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The following commit(s) were added to refs/heads/master by this push:
new 1b267f7 SAMZA-2055: Async high level api
1b267f7 is described below
commit 1b267f70b0db9222e2002c18f831ec23a6f08c42
Author: mynameborat <[email protected]>
AuthorDate: Wed Apr 3 12:21:00 2019 -0700
SAMZA-2055: Async high level api
https://cwiki.apache.org/confluence/display/SAMZA/SEP-21%3A+Samza+Async+API+for+High+Level
Author: mynameborat <[email protected]>
Reviewers: Jagadish <[email protected]>
Closes #905 from mynameborat/async-high-level-api
---
.../org/apache/samza/operators/MessageStream.java | 27 +++
.../operators/functions/AsyncFlatMapFunction.java | 73 ++++++++
.../apache/samza/operators/MessageStreamImpl.java | 10 ++
...atorImpl.java => AsyncFlatmapOperatorImpl.java} | 38 ++--
.../operators/impl/BroadcastOperatorImpl.java | 7 +-
...mOperatorImpl.java => FlatmapOperatorImpl.java} | 10 +-
.../samza/operators/impl/InputOperatorImpl.java | 22 ++-
.../apache/samza/operators/impl/OperatorImpl.java | 198 ++++++++++++++-------
.../samza/operators/impl/OperatorImplGraph.java | 5 +-
.../samza/operators/impl/OutputOperatorImpl.java | 6 +-
.../operators/impl/PartialJoinOperatorImpl.java | 12 +-
.../operators/impl/PartitionByOperatorImpl.java | 6 +-
.../operators/impl/SendToTableOperatorImpl.java | 7 +-
.../samza/operators/impl/SinkOperatorImpl.java | 6 +-
.../impl/StreamTableJoinOperatorImpl.java | 27 +--
.../samza/operators/impl/TriggerScheduler.java | 7 +-
.../samza/operators/impl/WindowOperatorImpl.java | 12 +-
.../operators/spec/AsyncFlatMapOperatorSpec.java | 59 ++++++
.../apache/samza/operators/spec/OperatorSpec.java | 3 +-
.../apache/samza/operators/spec/OperatorSpecs.java | 16 ++
.../org/apache/samza/task/StreamOperatorTask.java | 50 +++++-
.../org/apache/samza/task/TaskFactoryUtil.java | 2 +-
.../apache/samza/operators/TestJoinOperator.java | 52 +++---
...ratorImpl.java => TestFlatmapOperatorImpl.java} | 10 +-
.../samza/operators/impl/TestOperatorImpl.java | 28 +--
.../operators/impl/TestOperatorImplGraph.java | 4 +-
.../impl/TestStreamTableJoinOperatorImpl.java | 5 +-
.../samza/operators/impl/TestWindowOperator.java | 98 +++++-----
.../org/apache/samza/task/TestTaskFactoryUtil.java | 4 +-
.../samza/example/AppWithGlobalConfigExample.java | 32 +---
.../samza/example/AsyncApplicationExample.java | 135 ++++++++++++++
.../org/apache/samza/example/BroadcastExample.java | 13 +-
.../apache/samza/example/KeyValueStoreExample.java | 23 +--
.../org/apache/samza/example/MergeExample.java | 8 +-
.../samza/example/PageViewCounterExample.java | 32 +---
.../apache/samza/example/RepartitionExample.java | 17 +-
.../org/apache/samza/example/WindowExample.java | 11 +-
.../apache/samza/example/models/AdClickEvent.java | 37 ++++
.../samza/example/models/EnrichedAdClickEvent.java | 43 +++++
.../org/apache/samza/example/models/Member.java | 43 +++++
.../apache/samza/example/models/PageViewCount.java | 44 +++++
.../apache/samza/example/models/PageViewEvent.java | 43 +++++
.../controlmessages/WatermarkIntegrationTest.java | 7 +-
.../samza/test/operator/TestAsyncFlatMap.java | 180 +++++++++++++++++++
.../test/samzasql/TestSamzaSqlRemoteTable.java | 2 +
45 files changed, 1125 insertions(+), 349 deletions(-)
diff --git
a/samza-api/src/main/java/org/apache/samza/operators/MessageStream.java
b/samza-api/src/main/java/org/apache/samza/operators/MessageStream.java
index f951a84..141a4d2 100644
--- a/samza-api/src/main/java/org/apache/samza/operators/MessageStream.java
+++ b/samza-api/src/main/java/org/apache/samza/operators/MessageStream.java
@@ -22,7 +22,9 @@ import java.time.Duration;
import java.util.ArrayList;
import java.util.Collection;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.annotation.InterfaceStability;
+import org.apache.samza.operators.functions.AsyncFlatMapFunction;
import org.apache.samza.operators.functions.FilterFunction;
import org.apache.samza.operators.functions.FlatMapFunction;
import org.apache.samza.operators.functions.JoinFunction;
@@ -68,6 +70,31 @@ public interface MessageStream<M> {
<OM> MessageStream<OM> flatMap(FlatMapFunction<? super M, ? extends OM>
flatMapFn);
/**
+ * Applies the provided 1:n transformation asynchronously to this {@link
MessageStream}. The asynchronous transformation
+ * is specified through {@link AsyncFlatMapFunction}. The results are
emitted to the downstream operators upon the
+ * completion of the {@link CompletionStage} returned from the {@link
AsyncFlatMapFunction}.
+ * <p>
+ * The operator can operate in two modes depending on
<i>task.max.concurrency.</i>.
+ * <ul>
+ * <li>
+ * Serialized (task.max.concurrency=1) - In this mode, each invocation
of the {@link AsyncFlatMapFunction} is guaranteed
+ * to happen-before next invocation.
+ * </li>
+ * <li>
+ * Parallel (task.max.concurrency>1) - In this mode, multiple
invocations can happen in parallel without happens-before guarantee
+ * and the {@link AsyncFlatMapFunction} is required synchronize any
shared state. The operator doesn't provide any ordering guarantees.
+ * i.e The results corresponding to each invocation of this operator
might not be emitted in the same order as invocations.
+ * By extension, the operator chain that follows it also doesn't have
any ordering guarantees.
+ * </li>
+ * </ul>
+ *
+ * @param asyncFlatMapFn the async function to transform a message to zero
or more messages
+ * @param <OM> the type of messages in the transformed {@link MessageStream}
+ * @return the transformed {@link MessageStream}
+ */
+ <OM> MessageStream<OM> flatMapAsync(AsyncFlatMapFunction<? super M, ?
extends OM> asyncFlatMapFn);
+
+ /**
* Applies the provided function to messages in this {@link MessageStream}
and returns the
* filtered {@link MessageStream}.
* <p>
diff --git
a/samza-api/src/main/java/org/apache/samza/operators/functions/AsyncFlatMapFunction.java
b/samza-api/src/main/java/org/apache/samza/operators/functions/AsyncFlatMapFunction.java
new file mode 100644
index 0000000..a24e0fe
--- /dev/null
+++
b/samza-api/src/main/java/org/apache/samza/operators/functions/AsyncFlatMapFunction.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.operators.functions;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.concurrent.CompletionStage;
+import org.apache.samza.SamzaException;
+import org.apache.samza.annotation.InterfaceStability;
+
+
+/**
+ * Asynchronous variant of the {@link FlatMapFunction} used in tandem with
{@link
org.apache.samza.operators.MessageStream#flatMapAsync(AsyncFlatMapFunction)}
+ * to transform a collection of 0 or more messages.
+ * <p>
+ * Typically, {@link AsyncFlatMapFunction} is used for describing complex
transformations that involve IO operations or remote calls.
+ * The following pseudo code demonstrates a sample implementation of {@link
AsyncFlatMapFunction} that sends out an email
+ * and returns the status asynchronously.
+ * <pre> {@code
+ * AsyncFlatMapFunction<Email, Status> asyncEmailSender = (Email message)
-> {
+ * ...
+ *
+ * Request<Email> emailRequest = buildEmailRequest(message);
+ * Future<EmailResponse> emailResponseFuture =
emailClient.sendRequest(emailRequest); // send email asynchronously
+ * ...
+ *
+ * return new CompletableFuture<>(emailResponseFuture)
+ * .thenApply(response -> fetchStatus(response);
+ * }
+ * }
+ * </pre>
+ *
+ * <p>
+ * The function needs to be thread safe in case of
task.max.concurrency>1. It also needs to coordinate any
+ * shared state since happens-before is not guaranteed between the messages
delivered to the function. Refer to
+ * {@link
org.apache.samza.operators.MessageStream#flatMapAsync(AsyncFlatMapFunction)}
docs for more details on the modes
+ * and guarantees.
+ *
+ * <p>
+ * For each invocation, the {@link CompletionStage} returned by the function
should be completed successfully/exceptionally
+ * within task.callback.timeout.ms; failure to do so will result in {@link
SamzaException} bringing down the application.
+ *
+ * @param <M> type of the input message
+ * @param <OM> type of the transformed messages
+ */
[email protected]
+@FunctionalInterface
+public interface AsyncFlatMapFunction<M, OM> extends InitableFunction,
ClosableFunction, Serializable {
+
+ /**
+ * Transforms the provided message into a collection of 0 or more messages.
+ *
+ * @param message the input message to be transformed
+ * @return a {@link CompletionStage} of a {@link Collection} of transformed
messages
+ */
+ CompletionStage<Collection<OM>> apply(M message);
+}
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/MessageStreamImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/MessageStreamImpl.java
index b652d68..99cc81a 100644
--- a/samza-core/src/main/java/org/apache/samza/operators/MessageStreamImpl.java
+++ b/samza-core/src/main/java/org/apache/samza/operators/MessageStreamImpl.java
@@ -25,12 +25,14 @@ import java.util.Collection;
import org.apache.samza.SamzaException;
import
org.apache.samza.application.descriptors.StreamApplicationDescriptorImpl;
+import org.apache.samza.operators.functions.AsyncFlatMapFunction;
import org.apache.samza.operators.functions.FilterFunction;
import org.apache.samza.operators.functions.FlatMapFunction;
import org.apache.samza.operators.functions.JoinFunction;
import org.apache.samza.operators.functions.MapFunction;
import org.apache.samza.operators.functions.SinkFunction;
import org.apache.samza.operators.functions.StreamTableJoinFunction;
+import org.apache.samza.operators.spec.AsyncFlatMapOperatorSpec;
import org.apache.samza.operators.spec.BroadcastOperatorSpec;
import org.apache.samza.operators.spec.JoinOperatorSpec;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -103,6 +105,14 @@ public class MessageStreamImpl<M> implements
MessageStream<M> {
}
@Override
+ public <OM> MessageStream<OM> flatMapAsync(AsyncFlatMapFunction<? super M, ?
extends OM> flatMapFn) {
+ String opId = this.streamAppDesc.getNextOpId(OpCode.ASYNC_FLAT_MAP);
+ AsyncFlatMapOperatorSpec<M, OM> op =
OperatorSpecs.createAsyncOperatorSpec(flatMapFn, opId);
+ this.operatorSpec.registerNextOperatorSpec(op);
+ return new MessageStreamImpl<>(this.streamAppDesc, op);
+ }
+
+ @Override
public void sink(SinkFunction<? super M> sinkFn) {
String opId = this.streamAppDesc.getNextOpId(OpCode.SINK);
SinkOperatorSpec<M> op = OperatorSpecs.createSinkOperatorSpec(sinkFn,
opId);
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/StreamOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/AsyncFlatmapOperatorImpl.java
similarity index 60%
copy from
samza-core/src/main/java/org/apache/samza/operators/impl/StreamOperatorImpl.java
copy to
samza-core/src/main/java/org/apache/samza/operators/impl/AsyncFlatmapOperatorImpl.java
index 1a615bd..fa5e56a 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/StreamOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/AsyncFlatmapOperatorImpl.java
@@ -18,49 +18,41 @@
*/
package org.apache.samza.operators.impl;
+import java.util.Collection;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
-import org.apache.samza.operators.functions.FlatMapFunction;
+import org.apache.samza.operators.functions.AsyncFlatMapFunction;
+import org.apache.samza.operators.spec.AsyncFlatMapOperatorSpec;
import org.apache.samza.operators.spec.OperatorSpec;
-import org.apache.samza.operators.spec.StreamOperatorSpec;
import org.apache.samza.task.MessageCollector;
import org.apache.samza.task.TaskCoordinator;
-import java.util.Collection;
-
-
-/**
- * A simple operator that accepts a 1:n transform function and applies it to
each incoming message.
- *
- * @param <M> the type of input message
- * @param <RM> the type of result
- */
-class StreamOperatorImpl<M, RM> extends OperatorImpl<M, RM> {
- private final StreamOperatorSpec<M, RM> streamOpSpec;
- private final FlatMapFunction<M, RM> transformFn;
+public class AsyncFlatmapOperatorImpl<M, RM> extends OperatorImpl<M, RM> {
+ private final AsyncFlatMapOperatorSpec<M, RM> opSpec;
+ private final AsyncFlatMapFunction<M, RM> transformFn;
- StreamOperatorImpl(StreamOperatorSpec<M, RM> streamOpSpec) {
- this.streamOpSpec = streamOpSpec;
- this.transformFn = streamOpSpec.getTransformFn();
+ AsyncFlatmapOperatorImpl(AsyncFlatMapOperatorSpec<M, RM> opSpec) {
+ this.opSpec = opSpec;
+ this.transformFn = opSpec.getTransformFn();
}
-
@Override
protected void handleInit(Context context) {
- transformFn.init(context);
+ this.transformFn.init(context);
}
@Override
- public Collection<RM> handleMessage(M message, MessageCollector collector,
+ protected CompletionStage<Collection<RM>> handleMessageAsync(M message,
MessageCollector collector,
TaskCoordinator coordinator) {
- return this.transformFn.apply(message);
+ return transformFn.apply(message);
}
@Override
protected void handleClose() {
- this.transformFn.close();
}
+ @Override
protected OperatorSpec<M, RM> getOperatorSpec() {
- return streamOpSpec;
+ return opSpec;
}
}
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/BroadcastOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/BroadcastOperatorImpl.java
index 4965f7b..4f93f2c 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/BroadcastOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/BroadcastOperatorImpl.java
@@ -19,6 +19,8 @@
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.spec.BroadcastOperatorSpec;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -50,9 +52,10 @@ class BroadcastOperatorImpl<M> extends OperatorImpl<M, Void>
{
}
@Override
- protected Collection<Void> handleMessage(M message, MessageCollector
collector, TaskCoordinator coordinator) {
+ protected CompletionStage<Collection<Void>> handleMessageAsync(M message,
MessageCollector collector,
+ TaskCoordinator coordinator) {
collector.send(new OutgoingMessageEnvelope(systemStream, 0, null,
message));
- return Collections.emptyList();
+ return CompletableFuture.completedFuture(Collections.emptyList());
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/StreamOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/FlatmapOperatorImpl.java
similarity index 82%
rename from
samza-core/src/main/java/org/apache/samza/operators/impl/StreamOperatorImpl.java
rename to
samza-core/src/main/java/org/apache/samza/operators/impl/FlatmapOperatorImpl.java
index 1a615bd..3191d33 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/StreamOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/FlatmapOperatorImpl.java
@@ -18,6 +18,8 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.functions.FlatMapFunction;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -34,12 +36,12 @@ import java.util.Collection;
* @param <M> the type of input message
* @param <RM> the type of result
*/
-class StreamOperatorImpl<M, RM> extends OperatorImpl<M, RM> {
+class FlatmapOperatorImpl<M, RM> extends OperatorImpl<M, RM> {
private final StreamOperatorSpec<M, RM> streamOpSpec;
private final FlatMapFunction<M, RM> transformFn;
- StreamOperatorImpl(StreamOperatorSpec<M, RM> streamOpSpec) {
+ FlatmapOperatorImpl(StreamOperatorSpec<M, RM> streamOpSpec) {
this.streamOpSpec = streamOpSpec;
this.transformFn = streamOpSpec.getTransformFn();
}
@@ -50,9 +52,9 @@ class StreamOperatorImpl<M, RM> extends OperatorImpl<M, RM> {
}
@Override
- public Collection<RM> handleMessage(M message, MessageCollector collector,
+ protected CompletionStage<Collection<RM>> handleMessageAsync(M message,
MessageCollector collector,
TaskCoordinator coordinator) {
- return this.transformFn.apply(message);
+ return CompletableFuture.completedFuture(this.transformFn.apply(message));
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/InputOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/InputOperatorImpl.java
index 8cf528c..d9dff9e 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/InputOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/InputOperatorImpl.java
@@ -18,6 +18,9 @@
*/
package org.apache.samza.operators.impl;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.KV;
import org.apache.samza.system.descriptors.InputTransformer;
@@ -47,18 +50,21 @@ public final class InputOperatorImpl extends
OperatorImpl<IncomingMessageEnvelop
}
@Override
- public Collection<Object> handleMessage(IncomingMessageEnvelope ime,
MessageCollector collector, TaskCoordinator coordinator) {
- Object message;
+ protected CompletionStage<Collection<Object>>
handleMessageAsync(IncomingMessageEnvelope message,
+ MessageCollector collector, TaskCoordinator coordinator) {
+ Object result;
InputTransformer transformer = inputOpSpec.getTransformer();
if (transformer != null) {
- message = transformer.apply(ime);
+ result = transformer.apply(message);
} else {
- message = this.inputOpSpec.isKeyed() ? KV.of(ime.getKey(),
ime.getMessage()) : ime.getMessage();
+ result = this.inputOpSpec.isKeyed() ? KV.of(message.getKey(),
message.getMessage()) : message.getMessage();
}
- if (message != null) {
- return Collections.singletonList(message);
- }
- return Collections.emptyList();
+
+ Collection<Object> output = Optional.ofNullable(result)
+ .map(Collections::singletonList)
+ .orElse(Collections.emptyList());
+
+ return CompletableFuture.completedFuture(output);
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImpl.java
index 276e8c3..8d4ae21 100644
--- a/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImpl.java
+++ b/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImpl.java
@@ -18,6 +18,9 @@
*/
package org.apache.samza.operators.impl;
+import com.google.common.annotations.VisibleForTesting;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.SamzaException;
import org.apache.samza.config.Config;
import org.apache.samza.config.MetricsConfig;
@@ -161,21 +164,13 @@ public abstract class OperatorImpl<M, RM> {
|| taskModel.getSystemStreamPartitions().stream().anyMatch(ssp ->
ssp.getSystemStream().equals(input));
}
- /**
- * Handle the incoming {@code message} for this {@link OperatorImpl} and
propagate results to registered operators.
- * <p>
- * Delegates to {@link #handleMessage(Object, MessageCollector,
TaskCoordinator)} for handling the message.
- *
- * @param message the input message
- * @param collector the {@link MessageCollector} for this message
- * @param coordinator the {@link TaskCoordinator} for this message
- */
- public final void onMessage(M message, MessageCollector collector,
TaskCoordinator coordinator) {
+ public final CompletionStage<Void> onMessageAsync(M message,
MessageCollector collector,
+ TaskCoordinator coordinator) {
this.numMessage.inc();
long startNs = this.highResClock.nanoTime();
- Collection<RM> results;
+ CompletionStage<Collection<RM>> completableResultsFuture;
try {
- results = handleMessage(message, collector, coordinator);
+ completableResultsFuture = handleMessageAsync(message, collector,
coordinator);
} catch (ClassCastException e) {
String actualType = e.getMessage().replaceFirst(" cannot be cast to .*",
"");
String expectedType = e.getMessage().replaceFirst(".* cannot be cast to
", "");
@@ -186,30 +181,39 @@ public abstract class OperatorImpl<M, RM> {
getOpImplId(), getOperatorSpec().getSourceLocation(),
expectedType, actualType), e);
}
- long endNs = this.highResClock.nanoTime();
- this.handleMessageNs.update(endNs - startNs);
-
- results.forEach(rm ->
- this.registeredOperators.forEach(op ->
- op.onMessage(rm, collector, coordinator)));
-
- WatermarkFunction watermarkFn = getOperatorSpec().getWatermarkFn();
- if (watermarkFn != null) {
- // check whether there is new watermark emitted from the user function
- Long outputWm = watermarkFn.getOutputWatermark();
- propagateWatermark(outputWm, collector, coordinator);
- }
+ CompletionStage<Void> result =
completableResultsFuture.thenCompose(results -> {
+ long endNs = this.highResClock.nanoTime();
+ this.handleMessageNs.update(endNs - startNs);
+
+ return CompletableFuture.allOf(results.stream()
+ .flatMap(r -> this.registeredOperators.stream()
+ .map(op -> op.onMessageAsync(r, collector, coordinator)))
+ .toArray(CompletableFuture[]::new));
+ });
+
+ result.thenAccept(x -> {
+ WatermarkFunction watermarkFn = getOperatorSpec().getWatermarkFn();
+ if (watermarkFn != null) {
+ // check whether there is new watermark emitted from the user
function
+ Long outputWm = watermarkFn.getOutputWatermark();
+ propagateWatermark(outputWm, collector, coordinator);
+ }
+ });
+
+ return result;
}
/**
- * Handle the incoming {@code message} and return the results to be
propagated to registered operators.
+ * Handle the incoming {@code message} asynchronously and return a {@link
CompletionStage} of the results to be propagated
+ * to the registered operators.
*
- * @param message the input message
- * @param collector the {@link MessageCollector} in the context
- * @param coordinator the {@link TaskCoordinator} in the context
- * @return results of the transformation
+ * @param message the input message
+ * @param collector the {@link MessageCollector} in the context
+ * @param coordinator the {@link TaskCoordinator} in the context
+ *
+ * @return a {@code CompletionStage} of the results of the transformation
*/
- protected abstract Collection<RM> handleMessage(M message, MessageCollector
collector,
+ protected abstract CompletionStage<Collection<RM>> handleMessageAsync(M
message, MessageCollector collector,
TaskCoordinator coordinator);
/**
@@ -220,17 +224,23 @@ public abstract class OperatorImpl<M, RM> {
* @param collector the {@link MessageCollector} in the context
* @param coordinator the {@link TaskCoordinator} in the context
*/
- public final void onTimer(MessageCollector collector, TaskCoordinator
coordinator) {
+ public final CompletionStage<Void> onTimer(MessageCollector collector,
TaskCoordinator coordinator) {
long startNs = this.highResClock.nanoTime();
Collection<RM> results = handleTimer(collector, coordinator);
long endNs = this.highResClock.nanoTime();
this.handleTimerNs.update(endNs - startNs);
- results.forEach(rm ->
- this.registeredOperators.forEach(op ->
- op.onMessage(rm, collector, coordinator)));
- this.registeredOperators.forEach(op ->
- op.onTimer(collector, coordinator));
+ CompletionStage<Void> resultFuture = CompletableFuture.allOf(
+ results.stream()
+ .flatMap(r -> this.registeredOperators.stream()
+ .map(op -> op.onMessageAsync(r, collector, coordinator)))
+ .toArray(CompletableFuture[]::new));
+
+ return resultFuture.thenCompose(x ->
+ CompletableFuture.allOf(this.registeredOperators
+ .stream()
+ .map(op -> op.onTimer(collector, coordinator))
+ .toArray(CompletableFuture[]::new)));
}
/**
@@ -254,12 +264,14 @@ public abstract class OperatorImpl<M, RM> {
* @param collector message collector
* @param coordinator task coordinator
*/
- public final void aggregateEndOfStream(EndOfStreamMessage eos,
SystemStreamPartition ssp, MessageCollector collector,
+ public final CompletionStage<Void> aggregateEndOfStream(EndOfStreamMessage
eos, SystemStreamPartition ssp, MessageCollector collector,
TaskCoordinator coordinator) {
LOG.info("Received end-of-stream message from task {} in {}",
eos.getTaskName(), ssp);
eosStates.update(eos, ssp);
SystemStream stream = ssp.getSystemStream();
+ CompletionStage<Void> endOfStreamFuture =
CompletableFuture.completedFuture(null);
+
if (eosStates.isEndOfStream(stream)) {
LOG.info("Input {} reaches the end for task {}", stream.toString(),
taskName.getTaskName());
if (eos.getTaskName() != null) {
@@ -267,16 +279,20 @@ public abstract class OperatorImpl<M, RM> {
// broadcast the end-of-stream to all the peer partitions
controlMessageSender.broadcastToOtherPartitions(new
EndOfStreamMessage(), ssp, collector);
}
- // populate the end-of-stream through the dag
- onEndOfStream(collector, coordinator);
- if (eosStates.allEndOfStream()) {
- // all inputs have been end-of-stream, shut down the task
- LOG.info("All input streams have reached the end for task {}",
taskName.getTaskName());
- coordinator.commit(TaskCoordinator.RequestScope.CURRENT_TASK);
- coordinator.shutdown(TaskCoordinator.RequestScope.CURRENT_TASK);
- }
+ // populate the end-of-stream through the dag
+ endOfStreamFuture = onEndOfStream(collector, coordinator)
+ .thenAccept(result -> {
+ if (eosStates.allEndOfStream()) {
+ // all inputs have been end-of-stream, shut down the task
+ LOG.info("All input streams have reached the end for task {}",
taskName.getTaskName());
+ coordinator.commit(TaskCoordinator.RequestScope.CURRENT_TASK);
+
coordinator.shutdown(TaskCoordinator.RequestScope.CURRENT_TASK);
+ }
+ });
}
+
+ return endOfStreamFuture;
}
/**
@@ -285,16 +301,25 @@ public abstract class OperatorImpl<M, RM> {
* @param collector message collector
* @param coordinator task coordinator
*/
- private final void onEndOfStream(MessageCollector collector, TaskCoordinator
coordinator) {
+ private CompletionStage<Void> onEndOfStream(MessageCollector collector,
TaskCoordinator coordinator) {
+ CompletionStage<Void> endOfStreamFuture =
CompletableFuture.completedFuture(null);
+
if (inputStreams.stream().allMatch(input ->
eosStates.isEndOfStream(input))) {
Collection<RM> results = handleEndOfStream(collector, coordinator);
- results.forEach(rm ->
- this.registeredOperators.forEach(op ->
- op.onMessage(rm, collector, coordinator)));
+ CompletionStage<Void> resultFuture = CompletableFuture.allOf(
+ results.stream()
+ .flatMap(r -> this.registeredOperators.stream()
+ .map(op -> op.onMessageAsync(r, collector, coordinator)))
+ .toArray(CompletableFuture[]::new));
- this.registeredOperators.forEach(op -> op.onEndOfStream(collector,
coordinator));
+ endOfStreamFuture = resultFuture.thenCompose(x ->
+ CompletableFuture.allOf(this.registeredOperators.stream()
+ .map(op -> op.onEndOfStream(collector, coordinator))
+ .toArray(CompletableFuture[]::new)));
}
+
+ return endOfStreamFuture;
}
/**
@@ -318,11 +343,13 @@ public abstract class OperatorImpl<M, RM> {
* @param collector message collector
* @param coordinator task coordinator
*/
- public final void aggregateWatermark(WatermarkMessage watermarkMessage,
SystemStreamPartition ssp,
+ public final CompletionStage<Void> aggregateWatermark(WatermarkMessage
watermarkMessage, SystemStreamPartition ssp,
MessageCollector collector, TaskCoordinator coordinator) {
LOG.debug("Received watermark {} from {}",
watermarkMessage.getTimestamp(), ssp);
watermarkStates.update(watermarkMessage, ssp);
long watermark = watermarkStates.getWatermark(ssp.getSystemStream());
+ CompletionStage<Void> watermarkFuture =
CompletableFuture.completedFuture(null);
+
if (currentWatermark < watermark) {
LOG.debug("Got watermark {} from stream {}", watermark,
ssp.getSystemStream());
@@ -332,11 +359,11 @@ public abstract class OperatorImpl<M, RM> {
controlMessageSender.broadcastToOtherPartitions(new
WatermarkMessage(watermark), ssp, collector);
}
// populate the watermark through the dag
- onWatermark(watermark, collector, coordinator);
-
- // update metrics
- watermarkStates.updateAggregateMetric(ssp, watermark);
+ watermarkFuture = onWatermark(watermark, collector, coordinator)
+ .thenAccept(ignored -> watermarkStates.updateAggregateMetric(ssp,
watermark));
}
+
+ return watermarkFuture;
}
/**
@@ -347,16 +374,20 @@ public abstract class OperatorImpl<M, RM> {
* @param collector message collector
* @param coordinator task coordinator
*/
- private final void onWatermark(long watermark, MessageCollector collector,
TaskCoordinator coordinator) {
+ private CompletionStage<Void> onWatermark(long watermark, MessageCollector
collector, TaskCoordinator coordinator) {
final long inputWatermarkMin;
if (prevOperators.isEmpty()) {
// for input operator, use the watermark time coming from the source
input
inputWatermarkMin = watermark;
} else {
// InputWatermark(op) = min { OutputWatermark(op') | op' is upstream of
op}
- inputWatermarkMin = prevOperators.stream().map(op ->
op.getOutputWatermark()).min(Long::compare).get();
+ inputWatermarkMin = prevOperators.stream()
+ .map(op -> op.getOutputWatermark())
+ .min(Long::compare)
+ .get();
}
+ CompletionStage<Void> watermarkFuture =
CompletableFuture.completedFuture(null);
if (currentWatermark < inputWatermarkMin) {
// advance the watermark time of this operator
currentWatermark = inputWatermarkMin;
@@ -377,26 +408,38 @@ public abstract class OperatorImpl<M, RM> {
}
if (!output.isEmpty()) {
- output.forEach(rm ->
- this.registeredOperators.forEach(op ->
- op.onMessage(rm, collector, coordinator)));
+ watermarkFuture = CompletableFuture.allOf(
+ output.stream()
+ .flatMap(rm -> this.registeredOperators.stream()
+ .map(op -> op.onMessageAsync(rm, collector, coordinator)))
+ .toArray(CompletableFuture[]::new));
}
- propagateWatermark(outputWm, collector, coordinator);
+ watermarkFuture.thenCompose(res -> propagateWatermark(outputWm,
collector, coordinator));
}
+
+ return watermarkFuture;
}
- private void propagateWatermark(Long outputWm, MessageCollector collector,
TaskCoordinator coordinator) {
+ private CompletionStage<Void> propagateWatermark(Long outputWm,
MessageCollector collector, TaskCoordinator coordinator) {
+ CompletionStage<Void> watermarkFuture =
CompletableFuture.completedFuture(null);
+
if (outputWm != null) {
if (outputWatermark < outputWm) {
// advance the watermark
outputWatermark = outputWm;
LOG.debug("Advance output watermark to {} in operator {}",
outputWatermark, getOpImplId());
- this.registeredOperators.forEach(op -> op.onWatermark(outputWatermark,
collector, coordinator));
+ watermarkFuture = CompletableFuture.allOf(
+ this.registeredOperators
+ .stream()
+ .map(op -> op.onWatermark(outputWatermark, collector,
coordinator))
+ .toArray(CompletableFuture[]::new));
} else if (outputWatermark > outputWm) {
LOG.warn("Ignore watermark {} that is smaller than the previous
watermark {}.", outputWm, outputWatermark);
}
}
+
+ return watermarkFuture;
}
/**
@@ -449,9 +492,12 @@ public abstract class OperatorImpl<M, RM> {
final Collection<RM> output = scheduledFn.onCallback(key, time);
if (!output.isEmpty()) {
- output.forEach(rm ->
- registeredOperators.forEach(op ->
- op.onMessage(rm, collector, coordinator)));
+ CompletableFuture<Void> timerFuture =
CompletableFuture.allOf(output.stream()
+ .flatMap(r -> registeredOperators.stream()
+ .map(op -> op.onMessageAsync(r, collector,
coordinator)))
+ .toArray(CompletableFuture[]::new));
+
+ timerFuture.join();
}
} else {
throw new SamzaException(
@@ -499,6 +545,24 @@ public abstract class OperatorImpl<M, RM> {
return getOperatorSpec().getOpId();
}
+ /* Package Private helper method for tests to perform onMessage synchronously
+ * Note: It is only intended for test use
+ */
+ @VisibleForTesting
+ final void onMessage(M message, MessageCollector collector, TaskCoordinator
coordinator) {
+ onMessageAsync(message, collector, coordinator)
+ .toCompletableFuture().join();
+ }
+
+ /* Package Private helper method for tests to perform handleMessage
synchronously
+ * Note: It is only intended for test use
+ */
+ @VisibleForTesting
+ final Collection<RM> handleMessage(M message, MessageCollector collector,
TaskCoordinator coordinator) {
+ return handleMessageAsync(message, collector, coordinator)
+ .toCompletableFuture().join();
+ }
+
private HighResolutionClock createHighResClock(Config config) {
MetricsConfig metricsConfig = new MetricsConfig(config);
// The timer metrics calculation here is only enabled for debugging
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImplGraph.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImplGraph.java
index 9f33356..2b95321 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImplGraph.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/OperatorImplGraph.java
@@ -31,6 +31,7 @@ import org.apache.samza.operators.OperatorSpecGraph;
import org.apache.samza.operators.Scheduler;
import org.apache.samza.operators.functions.JoinFunction;
import org.apache.samza.operators.functions.PartialJoinFunction;
+import org.apache.samza.operators.spec.AsyncFlatMapOperatorSpec;
import org.apache.samza.operators.spec.BroadcastOperatorSpec;
import org.apache.samza.operators.spec.InputOperatorSpec;
import org.apache.samza.operators.spec.JoinOperatorSpec;
@@ -218,7 +219,7 @@ public class OperatorImplGraph {
if (operatorSpec instanceof InputOperatorSpec) {
return new InputOperatorImpl((InputOperatorSpec) operatorSpec);
} else if (operatorSpec instanceof StreamOperatorSpec) {
- return new StreamOperatorImpl((StreamOperatorSpec) operatorSpec);
+ return new FlatmapOperatorImpl((StreamOperatorSpec) operatorSpec);
} else if (operatorSpec instanceof SinkOperatorSpec) {
return new SinkOperatorImpl((SinkOperatorSpec) operatorSpec);
} else if (operatorSpec instanceof OutputOperatorSpec) {
@@ -243,6 +244,8 @@ public class OperatorImplGraph {
String streamId = ((BroadcastOperatorSpec)
operatorSpec).getOutputStream().getStreamId();
SystemStream systemStream =
streamConfig.streamIdToSystemStream(streamId);
return new BroadcastOperatorImpl((BroadcastOperatorSpec) operatorSpec,
systemStream, context);
+ } else if (operatorSpec instanceof AsyncFlatMapOperatorSpec) {
+ return new AsyncFlatmapOperatorImpl((AsyncFlatMapOperatorSpec)
operatorSpec);
}
throw new IllegalArgumentException(
String.format("Unsupported OperatorSpec: %s",
operatorSpec.getClass().getName()));
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/OutputOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/OutputOperatorImpl.java
index 407cdd9..566485a 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/OutputOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/OutputOperatorImpl.java
@@ -18,6 +18,8 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -52,7 +54,7 @@ class OutputOperatorImpl<M> extends OperatorImpl<M, Void> {
}
@Override
- public Collection<Void> handleMessage(M message, MessageCollector collector,
+ protected CompletionStage<Collection<Void>> handleMessageAsync(M message,
MessageCollector collector,
TaskCoordinator coordinator) {
Object key, value;
if (outputStream.isKeyed()) {
@@ -64,7 +66,7 @@ class OutputOperatorImpl<M> extends OperatorImpl<M, Void> {
}
collector.send(new OutgoingMessageEnvelope(systemStream, null, key,
value));
- return Collections.emptyList();
+ return CompletableFuture.completedFuture(Collections.emptyList());
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/PartialJoinOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/PartialJoinOperatorImpl.java
index 55658eb..6497f67 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/PartialJoinOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/PartialJoinOperatorImpl.java
@@ -18,6 +18,8 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.SamzaException;
import org.apache.samza.context.Context;
import org.apache.samza.operators.functions.PartialJoinFunction;
@@ -68,7 +70,10 @@ class PartialJoinOperatorImpl<K, M, OM, JM> extends
OperatorImpl<M, JM> {
}
@Override
- public Collection<JM> handleMessage(M message, MessageCollector collector,
TaskCoordinator coordinator) {
+ protected CompletionStage<Collection<JM>> handleMessageAsync(M message,
MessageCollector collector,
+ TaskCoordinator coordinator) {
+ Collection<JM> output = Collections.emptyList();
+
try {
KeyValueStore<K, TimestampedValue<M>> thisState =
thisPartialJoinFn.getState();
KeyValueStore<K, TimestampedValue<OM>> otherState =
otherPartialJoinFn.getState();
@@ -80,12 +85,13 @@ class PartialJoinOperatorImpl<K, M, OM, JM> extends
OperatorImpl<M, JM> {
long now = clock.currentTimeMillis();
if (otherMessage != null && otherMessage.getTimestamp() > now - ttlMs) {
JM joinResult = thisPartialJoinFn.apply(message,
otherMessage.getValue());
- return Collections.singletonList(joinResult);
+ output = Collections.singletonList(joinResult);
}
} catch (Exception e) {
throw new SamzaException("Error handling message in
PartialJoinOperatorImpl " + getOpImplId(), e);
}
- return Collections.emptyList();
+
+ return CompletableFuture.completedFuture(output);
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/PartitionByOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/PartitionByOperatorImpl.java
index 134a517..47ad4f6 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/PartitionByOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/PartitionByOperatorImpl.java
@@ -18,6 +18,8 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.context.InternalTaskContext;
import org.apache.samza.operators.functions.MapFunction;
@@ -66,13 +68,13 @@ class PartitionByOperatorImpl<M, K, V> extends
OperatorImpl<M, Void> {
}
@Override
- public Collection<Void> handleMessage(M message, MessageCollector collector,
+ protected CompletionStage<Collection<Void>> handleMessageAsync(M message,
MessageCollector collector,
TaskCoordinator coordinator) {
K key = keyFunction.apply(message);
V value = valueFunction.apply(message);
Long partitionKey = key == null ? 0L : null;
collector.send(new OutgoingMessageEnvelope(systemStream, partitionKey,
key, value));
- return Collections.emptyList();
+ return CompletableFuture.completedFuture(Collections.emptyList());
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/SendToTableOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/SendToTableOperatorImpl.java
index 6d84b17..1197b37 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/SendToTableOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/SendToTableOperatorImpl.java
@@ -18,6 +18,8 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -52,10 +54,11 @@ public class SendToTableOperatorImpl<K, V> extends
OperatorImpl<KV<K, V>, Void>
}
@Override
- protected Collection<Void> handleMessage(KV<K, V> message, MessageCollector
collector, TaskCoordinator coordinator) {
+ protected CompletionStage<Collection<Void>> handleMessageAsync(KV<K, V>
message, MessageCollector collector,
+ TaskCoordinator coordinator) {
table.put(message.getKey(), message.getValue());
// there should be no further chained operators since this is a terminal
operator.
- return Collections.emptyList();
+ return CompletableFuture.completedFuture(Collections.emptyList());
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/SinkOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/SinkOperatorImpl.java
index 6fe9006..56b2d33 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/SinkOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/SinkOperatorImpl.java
@@ -18,6 +18,8 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.functions.SinkFunction;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -48,11 +50,11 @@ class SinkOperatorImpl<M> extends OperatorImpl<M, Void> {
}
@Override
- public Collection<Void> handleMessage(M message, MessageCollector collector,
+ protected CompletionStage<Collection<Void>> handleMessageAsync(M message,
MessageCollector collector,
TaskCoordinator coordinator) {
this.sinkFn.apply(message, collector, coordinator);
// there should be no further chained operators since this is a terminal
operator.
- return Collections.emptyList();
+ return CompletableFuture.completedFuture(Collections.emptyList());
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/StreamTableJoinOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/StreamTableJoinOperatorImpl.java
index e3fc266..ec4d45d 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/StreamTableJoinOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/StreamTableJoinOperatorImpl.java
@@ -18,6 +18,9 @@
*/
package org.apache.samza.operators.impl;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.spec.OperatorSpec;
@@ -55,26 +58,30 @@ class StreamTableJoinOperatorImpl<K, M, R extends KV, JM>
extends OperatorImpl<M
}
@Override
- public Collection<JM> handleMessage(M message, MessageCollector collector,
TaskCoordinator coordinator) {
+ protected CompletionStage<Collection<JM>> handleMessageAsync(M message,
MessageCollector collector,
+ TaskCoordinator coordinator) {
if (message == null) {
- return Collections.emptyList();
+ return CompletableFuture.completedFuture(Collections.emptyList());
}
K key = joinOpSpec.getJoinFn().getMessageKey(message);
- Object recordValue = null;
- if (key != null) {
- recordValue = table.get(key);
- }
+ return Optional.ofNullable(key)
+ .map(joinKey -> table.getAsync(joinKey)
+ .thenApply(val -> getJoinOutput(joinKey, val, message)))
+ .orElseGet(() -> CompletableFuture.completedFuture(getJoinOutput(key,
null, message)));
+ }
- R record = recordValue != null ? (R) KV.of(key, recordValue) : null;
- JM output = joinOpSpec.getJoinFn().apply(message, record);
+ private Collection<JM> getJoinOutput(K key, Object value, M message) {
+ JM output = Optional.ofNullable(value)
+ .map(val -> (R) KV.of(key, val))
+ .map(record -> joinOpSpec.getJoinFn().apply(message, record))
+ .orElseGet(() -> joinOpSpec.getJoinFn().apply(message, null));
// The support for inner and outer join will be provided in the jonFn. For
inner join, the joinFn might
// return null, when the corresponding record is absent in the table.
return output != null ?
- Collections.singletonList(output)
- : Collections.emptyList();
+ Collections.singletonList(output) : Collections.emptyList();
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/TriggerScheduler.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/TriggerScheduler.java
index 952d9f1..7628d33 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/TriggerScheduler.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/TriggerScheduler.java
@@ -19,6 +19,8 @@
package org.apache.samza.operators.impl;
+import java.util.Queue;
+import java.util.concurrent.PriorityBlockingQueue;
import org.apache.samza.operators.triggers.Cancellable;
import org.apache.samza.util.Clock;
import org.slf4j.Logger;
@@ -26,7 +28,6 @@ import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
-import java.util.PriorityQueue;
/**
* Allows to schedule and cancel callbacks for triggers.
@@ -35,11 +36,11 @@ public class TriggerScheduler<WK> {
private static final Logger LOG =
LoggerFactory.getLogger(TriggerScheduler.class);
- private final PriorityQueue<TriggerCallbackState<WK>> pendingCallbacks;
+ private final Queue<TriggerCallbackState<WK>> pendingCallbacks;
private final Clock clock;
public TriggerScheduler(Clock clock) {
- this.pendingCallbacks = new PriorityQueue<>();
+ this.pendingCallbacks = new PriorityBlockingQueue<>();
this.clock = clock;
}
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/impl/WindowOperatorImpl.java
b/samza-core/src/main/java/org/apache/samza/operators/impl/WindowOperatorImpl.java
index 0241d9e..f2b5914 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/impl/WindowOperatorImpl.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/impl/WindowOperatorImpl.java
@@ -21,6 +21,9 @@
package org.apache.samza.operators.impl;
import com.google.common.base.Preconditions;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.ConcurrentHashMap;
import org.apache.samza.context.Context;
import org.apache.samza.operators.functions.FoldLeftFunction;
import org.apache.samza.operators.functions.MapFunction;
@@ -53,7 +56,6 @@ import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
-import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
@@ -96,7 +98,7 @@ public class WindowOperatorImpl<M, K> extends OperatorImpl<M,
WindowPane<K, Obje
private final MapFunction<M, K> keyFn;
private final TriggerScheduler<K> triggerScheduler;
- private final Map<TriggerKey<K>, TriggerImplHandler> triggers = new
HashMap<>();
+ private final Map<TriggerKey<K>, TriggerImplHandler> triggers = new
ConcurrentHashMap<>();
private TimeSeriesStore<K, Object> timeSeriesStore;
public WindowOperatorImpl(WindowOperatorSpec<M, K, Object> windowOpSpec,
Clock clock) {
@@ -134,8 +136,8 @@ public class WindowOperatorImpl<M, K> extends
OperatorImpl<M, WindowPane<K, Obje
}
@Override
- public Collection<WindowPane<K, Object>> handleMessage(
- M message, MessageCollector collector, TaskCoordinator coordinator) {
+ protected CompletionStage<Collection<WindowPane<K, Object>>>
handleMessageAsync(M message, MessageCollector collector,
+ TaskCoordinator coordinator) {
LOG.trace("Processing message envelope: {}", message);
List<WindowPane<K, Object>> results = new ArrayList<>();
@@ -177,7 +179,7 @@ public class WindowOperatorImpl<M, K> extends
OperatorImpl<M, WindowPane<K, Obje
maybeTriggeredPane.ifPresent(results::add);
}
- return results;
+ return CompletableFuture.completedFuture(results);
}
@Override
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/spec/AsyncFlatMapOperatorSpec.java
b/samza-core/src/main/java/org/apache/samza/operators/spec/AsyncFlatMapOperatorSpec.java
new file mode 100644
index 0000000..968859b
--- /dev/null
+++
b/samza-core/src/main/java/org/apache/samza/operators/spec/AsyncFlatMapOperatorSpec.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.operators.spec;
+
+import org.apache.samza.operators.functions.AsyncFlatMapFunction;
+import org.apache.samza.operators.functions.ScheduledFunction;
+import org.apache.samza.operators.functions.WatermarkFunction;
+
+
+/**
+ * The spec for an operator that transforms each input message to a collection
of output messages.
+ *
+ * @param <M> type of input message
+ * @param <OM> type of output messages
+ */
+public class AsyncFlatMapOperatorSpec<M, OM> extends OperatorSpec<M, OM> {
+ protected final AsyncFlatMapFunction<M, OM> transformFn;
+
+ /**
+ * Constructor for a {@link AsyncFlatMapOperatorSpec}.
+ *
+ * @param transformFn the transformation function
+ * @param opId the unique ID for this {@link OperatorSpec}
+ */
+ AsyncFlatMapOperatorSpec(AsyncFlatMapFunction<M, OM> transformFn, String
opId) {
+ super(OpCode.FLAT_MAP, opId);
+ this.transformFn = transformFn;
+ }
+
+ @Override
+ public WatermarkFunction getWatermarkFn() {
+ return this.transformFn instanceof WatermarkFunction ? (WatermarkFunction)
this.transformFn : null;
+ }
+
+ @Override
+ public ScheduledFunction getScheduledFn() {
+ return this.transformFn instanceof ScheduledFunction ? (ScheduledFunction)
this.transformFn : null;
+ }
+
+ public AsyncFlatMapFunction<M, OM> getTransformFn() {
+ return this.transformFn;
+ }
+}
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpec.java
b/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpec.java
index 1886d1b..a047889 100644
--- a/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpec.java
+++ b/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpec.java
@@ -51,7 +51,8 @@ public abstract class OperatorSpec<M, OM> implements
Serializable {
MERGE,
PARTITION_BY,
OUTPUT,
- BROADCAST
+ BROADCAST,
+ ASYNC_FLAT_MAP
}
private final String opId;
diff --git
a/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpecs.java
b/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpecs.java
index ff3fe67..89d6b38 100644
---
a/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpecs.java
+++
b/samza-core/src/main/java/org/apache/samza/operators/spec/OperatorSpecs.java
@@ -20,6 +20,7 @@
package org.apache.samza.operators.spec;
import org.apache.samza.operators.KV;
+import org.apache.samza.operators.functions.AsyncFlatMapFunction;
import org.apache.samza.operators.functions.FilterFunction;
import org.apache.samza.operators.functions.FlatMapFunction;
import org.apache.samza.system.descriptors.InputTransformer;
@@ -96,6 +97,21 @@ public class OperatorSpecs {
}
/**
+ * Creates a {@link AsyncFlatMapOperatorSpec} for {@link
AsyncFlatMapFunction}.
+ *
+ * @param asyncFlatMapFn the transformation function
+ * @param opId the unique ID of the operator
+ * @param <M> type of input message
+ * @param <OM> type of output message
+ * @return the {@link AsyncFlatMapOperatorSpec}
+ */
+ public static <M, OM> AsyncFlatMapOperatorSpec<M, OM>
createAsyncOperatorSpec(
+ AsyncFlatMapFunction<? super M, ? extends OM> asyncFlatMapFn, String
opId) {
+ return new AsyncFlatMapOperatorSpec<>((AsyncFlatMapFunction<M, OM>)
asyncFlatMapFn, opId);
+ }
+
+
+ /**
* Creates a {@link SinkOperatorSpec} for the sink operator.
*
* @param sinkFn the sink function provided by the user
diff --git
a/samza-core/src/main/java/org/apache/samza/task/StreamOperatorTask.java
b/samza-core/src/main/java/org/apache/samza/task/StreamOperatorTask.java
index 87131d7..387ad2e 100644
--- a/samza-core/src/main/java/org/apache/samza/task/StreamOperatorTask.java
+++ b/samza-core/src/main/java/org/apache/samza/task/StreamOperatorTask.java
@@ -18,6 +18,10 @@
*/
package org.apache.samza.task;
+import com.google.common.base.Preconditions;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import org.apache.samza.SamzaException;
import org.apache.samza.context.Context;
import org.apache.samza.operators.OperatorSpecGraph;
import org.apache.samza.operators.impl.InputOperatorImpl;
@@ -37,7 +41,7 @@ import org.slf4j.LoggerFactory;
* A {@link StreamTask} implementation that brings all the operator API
implementation components together and
* feeds the input messages into the user-defined transformation chains in
{@link OperatorSpecGraph}.
*/
-public class StreamOperatorTask implements StreamTask, InitableTask,
WindowableTask, ClosableTask {
+public class StreamOperatorTask implements AsyncStreamTask, InitableTask,
WindowableTask, ClosableTask {
private static final Logger LOG =
LoggerFactory.getLogger(StreamOperatorTask.class);
private final OperatorSpecGraph specGraph;
@@ -90,34 +94,56 @@ public class StreamOperatorTask implements StreamTask,
InitableTask, WindowableT
* @param ime incoming message envelope to process
* @param collector the collector to send messages with
* @param coordinator the coordinator to request commits or shutdown
+ * @param callback the task callback handle
*/
@Override
- public final void process(IncomingMessageEnvelope ime, MessageCollector
collector, TaskCoordinator coordinator) {
+ public final void processAsync(IncomingMessageEnvelope ime, MessageCollector
collector, TaskCoordinator coordinator,
+ TaskCallback callback) {
SystemStream systemStream =
ime.getSystemStreamPartition().getSystemStream();
InputOperatorImpl inputOpImpl =
operatorImplGraph.getInputOperator(systemStream);
if (inputOpImpl != null) {
- switch (MessageType.of(ime.getMessage())) {
+ CompletionStage<Void> processFuture;
+ MessageType messageType = MessageType.of(ime.getMessage());
+ switch (messageType) {
case USER_MESSAGE:
- inputOpImpl.onMessage(ime, collector, coordinator);
+ processFuture = inputOpImpl.onMessageAsync(ime, collector,
coordinator);
break;
case END_OF_STREAM:
EndOfStreamMessage eosMessage = (EndOfStreamMessage)
ime.getMessage();
- inputOpImpl.aggregateEndOfStream(eosMessage,
ime.getSystemStreamPartition(), collector, coordinator);
+ processFuture =
+ inputOpImpl.aggregateEndOfStream(eosMessage,
ime.getSystemStreamPartition(), collector, coordinator);
break;
case WATERMARK:
WatermarkMessage watermarkMessage = (WatermarkMessage)
ime.getMessage();
- inputOpImpl.aggregateWatermark(watermarkMessage,
ime.getSystemStreamPartition(), collector, coordinator);
+ processFuture =
+ inputOpImpl.aggregateWatermark(watermarkMessage,
ime.getSystemStreamPartition(), collector, coordinator);
+ break;
+
+ default:
+ processFuture = failedFuture(new SamzaException("Unknown message
type " + messageType + " encountered."));
break;
}
+
+ processFuture.whenComplete((val, ex) -> {
+ if (ex != null) {
+ callback.failure(ex);
+ } else {
+ callback.complete();
+ }
+ });
}
}
@Override
public final void window(MessageCollector collector, TaskCoordinator
coordinator) {
- operatorImplGraph.getAllInputOperators()
- .forEach(inputOperator -> inputOperator.onTimer(collector,
coordinator));
+ CompletableFuture<Void> windowFuture =
CompletableFuture.allOf(operatorImplGraph.getAllInputOperators()
+ .stream()
+ .map(inputOperator -> inputOperator.onTimer(collector, coordinator))
+ .toArray(CompletableFuture[]::new));
+
+ windowFuture.join();
}
@Override
@@ -131,4 +157,12 @@ public class StreamOperatorTask implements StreamTask,
InitableTask, WindowableT
OperatorImplGraph getOperatorImplGraph() {
return this.operatorImplGraph;
}
+
+ private static CompletableFuture<Void> failedFuture(Throwable ex) {
+ Preconditions.checkNotNull(ex);
+ CompletableFuture<Void> failedFuture = new CompletableFuture<>();
+ failedFuture.completeExceptionally(ex);
+
+ return failedFuture;
+ }
}
diff --git
a/samza-core/src/main/java/org/apache/samza/task/TaskFactoryUtil.java
b/samza-core/src/main/java/org/apache/samza/task/TaskFactoryUtil.java
index b2297e1..7ad1a0a 100644
--- a/samza-core/src/main/java/org/apache/samza/task/TaskFactoryUtil.java
+++ b/samza-core/src/main/java/org/apache/samza/task/TaskFactoryUtil.java
@@ -48,7 +48,7 @@ public class TaskFactoryUtil {
if (appDesc instanceof TaskApplicationDescriptorImpl) {
return ((TaskApplicationDescriptorImpl) appDesc).getTaskFactory();
} else if (appDesc instanceof StreamApplicationDescriptorImpl) {
- return (StreamTaskFactory) () -> new StreamOperatorTask(
+ return (AsyncStreamTaskFactory) () -> new StreamOperatorTask(
((StreamApplicationDescriptorImpl) appDesc).getOperatorSpecGraph());
}
throw new
IllegalArgumentException(String.format("ApplicationDescriptorImpl has to be
either TaskApplicationDescriptorImpl or "
diff --git
a/samza-core/src/test/java/org/apache/samza/operators/TestJoinOperator.java
b/samza-core/src/test/java/org/apache/samza/operators/TestJoinOperator.java
index 90e59ae..b310e6f 100644
--- a/samza-core/src/test/java/org/apache/samza/operators/TestJoinOperator.java
+++ b/samza-core/src/test/java/org/apache/samza/operators/TestJoinOperator.java
@@ -41,6 +41,7 @@ import org.apache.samza.system.SystemStream;
import org.apache.samza.system.SystemStreamPartition;
import org.apache.samza.task.MessageCollector;
import org.apache.samza.task.StreamOperatorTask;
+import org.apache.samza.task.TaskCallback;
import org.apache.samza.task.TaskCoordinator;
import org.apache.samza.testUtils.StreamTestUtils;
import org.apache.samza.testUtils.TestClock;
@@ -69,6 +70,7 @@ public class TestJoinOperator {
private static final Duration JOIN_TTL = Duration.ofMinutes(10);
private final TaskCoordinator taskCoordinator = mock(TaskCoordinator.class);
+ private final TaskCallback taskCallback = mock(TaskCallback.class);
private final Set<Integer> numbers = ImmutableSet.of(1, 2, 3, 4, 5, 6, 7, 8,
9, 10);
@Test
@@ -79,9 +81,9 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to second stream with same keys
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int outputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(110, outputSum);
@@ -118,7 +120,7 @@ public class TestJoinOperator {
MessageCollector messageCollector = mock(MessageCollector.class);
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// close should not be called till now
sot.close();
@@ -137,9 +139,9 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to second stream
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to first stream with same keys
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int outputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(110, outputSum);
@@ -153,9 +155,9 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to second stream with different keys
- numbers.forEach(n -> sot.process(new SecondStreamIME(n + 100, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n + 100, n),
messageCollector, taskCoordinator, taskCallback));
assertTrue(output.isEmpty());
}
@@ -168,9 +170,9 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to second stream
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to first stream with different keys
- numbers.forEach(n -> sot.process(new FirstStreamIME(n + 100, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n + 100, n),
messageCollector, taskCoordinator, taskCallback));
assertTrue(output.isEmpty());
}
@@ -183,11 +185,11 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to first stream again with same keys but different values
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, 2 * n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, 2 * n),
messageCollector, taskCoordinator, taskCallback));
// push messages to second stream with same key
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int outputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(165, outputSum); // should use latest messages in the first
stream
@@ -201,11 +203,11 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to second stream
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to second stream again with same keys but different values
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, 2 * n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, 2 * n),
messageCollector, taskCoordinator, taskCallback));
// push messages to first stream with same key
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int outputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(165, outputSum); // should use latest messages in the second
stream
@@ -219,9 +221,9 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to second stream with same key
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int outputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(110, outputSum);
@@ -229,7 +231,7 @@ public class TestJoinOperator {
output.clear();
// push messages to first stream with same keys once again.
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int newOutputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(110, newOutputSum); // should produce the same output as
before
}
@@ -242,9 +244,9 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
// push messages to second stream with same key
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int outputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(110, outputSum);
@@ -252,7 +254,7 @@ public class TestJoinOperator {
output.clear();
// push messages to second stream with same keys once again.
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
int newOutputSum = output.stream().reduce(0, (s, m) -> s + m);
assertEquals(110, newOutputSum); // should produce the same output as
before
}
@@ -266,13 +268,13 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to first stream
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
testClock.advanceTime(JOIN_TTL.plus(Duration.ofMinutes(1))); // 1 minute
after ttl
sot.window(messageCollector, taskCoordinator); // should expire first
stream messages
// push messages to second stream with same key
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
assertTrue(output.isEmpty());
}
@@ -286,13 +288,13 @@ public class TestJoinOperator {
MessageCollector messageCollector = envelope -> output.add((Integer)
envelope.getMessage());
// push messages to second stream
- numbers.forEach(n -> sot.process(new SecondStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new SecondStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
testClock.advanceTime(JOIN_TTL.plus(Duration.ofMinutes(1))); // 1 minute
after ttl
sot.window(messageCollector, taskCoordinator); // should expire second
stream messages
// push messages to first stream with same key
- numbers.forEach(n -> sot.process(new FirstStreamIME(n, n),
messageCollector, taskCoordinator));
+ numbers.forEach(n -> sot.processAsync(new FirstStreamIME(n, n),
messageCollector, taskCoordinator, taskCallback));
assertTrue(output.isEmpty());
}
diff --git
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamOperatorImpl.java
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestFlatmapOperatorImpl.java
similarity index 90%
rename from
samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamOperatorImpl.java
rename to
samza-core/src/test/java/org/apache/samza/operators/impl/TestFlatmapOperatorImpl.java
index ae05305..378f574 100644
---
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamOperatorImpl.java
+++
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestFlatmapOperatorImpl.java
@@ -35,7 +35,7 @@ import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
-public class TestStreamOperatorImpl {
+public class TestFlatmapOperatorImpl {
@Test
@SuppressWarnings("unchecked")
@@ -43,8 +43,8 @@ public class TestStreamOperatorImpl {
StreamOperatorSpec<TestMessageEnvelope, TestOutputMessageEnvelope> mockOp
= mock(StreamOperatorSpec.class);
FlatMapFunction<TestMessageEnvelope, TestOutputMessageEnvelope> txfmFn =
mock(FlatMapFunction.class);
when(mockOp.getTransformFn()).thenReturn(txfmFn);
- StreamOperatorImpl<TestMessageEnvelope, TestOutputMessageEnvelope> opImpl =
- new StreamOperatorImpl<>(mockOp);
+ FlatmapOperatorImpl<TestMessageEnvelope, TestOutputMessageEnvelope> opImpl
=
+ new FlatmapOperatorImpl<>(mockOp);
TestMessageEnvelope inMsg = mock(TestMessageEnvelope.class);
Collection<TestOutputMessageEnvelope> mockOutputs = mock(Collection.class);
when(txfmFn.apply(inMsg)).thenReturn(mockOutputs);
@@ -62,8 +62,8 @@ public class TestStreamOperatorImpl {
FlatMapFunction<TestMessageEnvelope, TestOutputMessageEnvelope> txfmFn =
mock(FlatMapFunction.class);
when(mockOp.getTransformFn()).thenReturn(txfmFn);
- StreamOperatorImpl<TestMessageEnvelope, TestOutputMessageEnvelope> opImpl =
- new StreamOperatorImpl<>(mockOp);
+ FlatmapOperatorImpl<TestMessageEnvelope, TestOutputMessageEnvelope> opImpl
=
+ new FlatmapOperatorImpl<>(mockOp);
// ensure that close is not called yet
verify(txfmFn, times(0)).close();
diff --git
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImpl.java
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImpl.java
index 6279960..aea35aa 100644
---
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImpl.java
+++
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImpl.java
@@ -21,6 +21,8 @@ package org.apache.samza.operators.impl;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
import org.apache.samza.context.Context;
import org.apache.samza.context.InternalTaskContext;
import org.apache.samza.context.MockContext;
@@ -85,13 +87,15 @@ public class TestOperatorImpl {
// register a couple of operators
OperatorImpl mockNextOpImpl1 = mock(OperatorImpl.class);
when(mockNextOpImpl1.getOperatorSpec()).thenReturn(new TestOpSpec());
- when(mockNextOpImpl1.handleMessage(anyObject(), anyObject(),
anyObject())).thenReturn(Collections.emptyList());
+ when(mockNextOpImpl1.handleMessageAsync(anyObject(), anyObject(),
anyObject()))
+
.thenReturn(CompletableFuture.completedFuture(Collections.emptyList()));
mockNextOpImpl1.init(this.internalTaskContext);
opImpl.registerNextOperator(mockNextOpImpl1);
OperatorImpl mockNextOpImpl2 = mock(OperatorImpl.class);
when(mockNextOpImpl2.getOperatorSpec()).thenReturn(new TestOpSpec());
- when(mockNextOpImpl2.handleMessage(anyObject(), anyObject(),
anyObject())).thenReturn(Collections.emptyList());
+ when(mockNextOpImpl2.handleMessageAsync(anyObject(), anyObject(),
anyObject()))
+
.thenReturn(CompletableFuture.completedFuture(Collections.emptyList()));
mockNextOpImpl2.init(this.internalTaskContext);
opImpl.registerNextOperator(mockNextOpImpl2);
@@ -101,8 +105,8 @@ public class TestOperatorImpl {
opImpl.onMessage(mock(Object.class), mockCollector, mockCoordinator);
// verify that it propagates its handleMessage results to next operators
- verify(mockNextOpImpl1, times(1)).handleMessage(mockTestOpImplOutput,
mockCollector, mockCoordinator);
- verify(mockNextOpImpl2, times(1)).handleMessage(mockTestOpImplOutput,
mockCollector, mockCoordinator);
+ verify(mockNextOpImpl1, times(1)).handleMessageAsync(mockTestOpImplOutput,
mockCollector, mockCoordinator);
+ verify(mockNextOpImpl2, times(1)).handleMessageAsync(mockTestOpImplOutput,
mockCollector, mockCoordinator);
}
@Test
@@ -137,13 +141,15 @@ public class TestOperatorImpl {
// register a couple of operators
OperatorImpl mockNextOpImpl1 = mock(OperatorImpl.class);
when(mockNextOpImpl1.getOperatorSpec()).thenReturn(new TestOpSpec());
- when(mockNextOpImpl1.handleMessage(anyObject(), anyObject(),
anyObject())).thenReturn(Collections.emptyList());
+ when(mockNextOpImpl1.handleMessageAsync(anyObject(), anyObject(),
anyObject()))
+
.thenReturn(CompletableFuture.completedFuture(Collections.emptyList()));
mockNextOpImpl1.init(this.internalTaskContext);
opImpl.registerNextOperator(mockNextOpImpl1);
OperatorImpl mockNextOpImpl2 = mock(OperatorImpl.class);
when(mockNextOpImpl2.getOperatorSpec()).thenReturn(new TestOpSpec());
- when(mockNextOpImpl2.handleMessage(anyObject(), anyObject(),
anyObject())).thenReturn(Collections.emptyList());
+ when(mockNextOpImpl2.handleMessageAsync(anyObject(), anyObject(),
anyObject()))
+
.thenReturn(CompletableFuture.completedFuture(Collections.emptyList()));
mockNextOpImpl2.init(this.internalTaskContext);
opImpl.registerNextOperator(mockNextOpImpl2);
@@ -153,8 +159,8 @@ public class TestOperatorImpl {
opImpl.onTimer(mockCollector, mockCoordinator);
// verify that it propagates its handleTimer results to next operators
- verify(mockNextOpImpl1, times(1)).handleMessage(mockTestOpImplOutput,
mockCollector, mockCoordinator);
- verify(mockNextOpImpl2, times(1)).handleMessage(mockTestOpImplOutput,
mockCollector, mockCoordinator);
+ verify(mockNextOpImpl1, times(1)).handleMessageAsync(mockTestOpImplOutput,
mockCollector, mockCoordinator);
+ verify(mockNextOpImpl2, times(1)).handleMessageAsync(mockTestOpImplOutput,
mockCollector, mockCoordinator);
// verify that it propagates the timer tick to next operators
verify(mockNextOpImpl1, times(1)).handleTimer(mockCollector,
mockCoordinator);
@@ -197,9 +203,9 @@ public class TestOperatorImpl {
protected void handleInit(Context context) {}
@Override
- public Collection<Object> handleMessage(Object message,
- MessageCollector collector, TaskCoordinator coordinator) {
- return Collections.singletonList(mockOutput);
+ public CompletionStage<Collection<Object>> handleMessageAsync(Object
message, MessageCollector collector,
+ TaskCoordinator coordinator) {
+ return
CompletableFuture.completedFuture(Collections.singletonList(mockOutput));
}
@Override
diff --git
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImplGraph.java
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImplGraph.java
index 7fbeb74..61ee7a2 100644
---
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImplGraph.java
+++
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestOperatorImplGraph.java
@@ -150,11 +150,11 @@ public class TestOperatorImplGraph {
InputOperatorImpl inputOpImpl = opImplGraph.getInputOperator(new
SystemStream(inputSystem, inputPhysicalName));
assertEquals(1, inputOpImpl.registeredOperators.size());
- OperatorImpl filterOpImpl = (StreamOperatorImpl)
inputOpImpl.registeredOperators.iterator().next();
+ OperatorImpl filterOpImpl = (FlatmapOperatorImpl)
inputOpImpl.registeredOperators.iterator().next();
assertEquals(1, filterOpImpl.registeredOperators.size());
assertEquals(OpCode.FILTER, filterOpImpl.getOperatorSpec().getOpCode());
- OperatorImpl mapOpImpl = (StreamOperatorImpl)
filterOpImpl.registeredOperators.iterator().next();
+ OperatorImpl mapOpImpl = (FlatmapOperatorImpl)
filterOpImpl.registeredOperators.iterator().next();
assertEquals(1, mapOpImpl.registeredOperators.size());
assertEquals(OpCode.MAP, mapOpImpl.getOperatorSpec().getOpCode());
diff --git
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamTableJoinOperatorImpl.java
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamTableJoinOperatorImpl.java
index 8fd161b..69950d9 100644
---
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamTableJoinOperatorImpl.java
+++
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestStreamTableJoinOperatorImpl.java
@@ -18,6 +18,7 @@
*/
package org.apache.samza.operators.impl;
+import java.util.concurrent.CompletableFuture;
import junit.framework.Assert;
import org.apache.samza.SamzaException;
import org.apache.samza.context.Context;
@@ -72,8 +73,8 @@ public class TestStreamTableJoinOperatorImpl {
}
});
ReadWriteTable table = mock(ReadWriteTable.class);
- when(table.get("1")).thenReturn("r1");
- when(table.get("2")).thenReturn(null);
+
when(table.getAsync("1")).thenReturn(CompletableFuture.completedFuture("r1"));
+
when(table.getAsync("2")).thenReturn(CompletableFuture.completedFuture(null));
Context context = new MockContext();
when(context.getTaskContext().getTable(tableId)).thenReturn(table);
diff --git
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestWindowOperator.java
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestWindowOperator.java
index c588b3c..594cd4a 100644
---
a/samza-core/src/test/java/org/apache/samza/operators/impl/TestWindowOperator.java
+++
b/samza-core/src/test/java/org/apache/samza/operators/impl/TestWindowOperator.java
@@ -61,6 +61,7 @@ import org.apache.samza.system.SystemStream;
import org.apache.samza.system.SystemStreamPartition;
import org.apache.samza.task.MessageCollector;
import org.apache.samza.task.StreamOperatorTask;
+import org.apache.samza.task.TaskCallback;
import org.apache.samza.task.TaskCoordinator;
import org.apache.samza.testUtils.TestClock;
import org.junit.Assert;
@@ -74,6 +75,7 @@ import static org.mockito.Mockito.when;
public class TestWindowOperator {
private final TaskCoordinator taskCoordinator = mock(TaskCoordinator.class);
+ private final TaskCallback taskCallback = mock(TaskCallback.class);
private final List<Integer> integers = ImmutableList.of(1, 2, 1, 2, 1, 2, 1,
2, 3);
private Context context;
private Config config;
@@ -113,7 +115,7 @@ public class TestWindowOperator {
task.init(this.context);
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- integers.forEach(n -> task.process(new IntegerEnvelope(n),
messageCollector, taskCoordinator));
+ integers.forEach(n -> task.processAsync(new IntegerEnvelope(n),
messageCollector, taskCoordinator, taskCallback));
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -149,7 +151,7 @@ public class TestWindowOperator {
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
Assert.assertEquals(windowPanes.size(), 0);
- integers.forEach(n -> task.process(new IntegerEnvelope(n),
messageCollector, taskCoordinator));
+ integers.forEach(n -> task.processAsync(new IntegerEnvelope(n),
messageCollector, taskCoordinator, taskCallback));
Assert.assertEquals(windowPanes.size(), 0);
testClock.advanceTime(Duration.ofSeconds(1));
@@ -173,7 +175,7 @@ public class TestWindowOperator {
StreamOperatorTask task = new StreamOperatorTask(sgb, testClock);
task.init(this.context);
MessageCollector messageCollector = envelope ->
windowPanes.add((WindowPane<Integer, Integer>) envelope.getMessage());
- integers.forEach(n -> task.process(new IntegerEnvelope(n),
messageCollector, taskCoordinator));
+ integers.forEach(n -> task.processAsync(new IntegerEnvelope(n),
messageCollector, taskCoordinator, taskCallback));
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -196,7 +198,7 @@ public class TestWindowOperator {
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- integers.forEach(n -> task.process(new IntegerEnvelope(n),
messageCollector, taskCoordinator));
+ integers.forEach(n -> task.processAsync(new IntegerEnvelope(n),
messageCollector, taskCoordinator, taskCallback));
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -224,8 +226,8 @@ public class TestWindowOperator {
task.init(this.context);
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -233,10 +235,10 @@ public class TestWindowOperator {
Assert.assertEquals(windowPanes.get(0).getKey().getPaneId(), "1");
Assert.assertEquals(windowPanes.get(0).getKey().getKey(), new Integer(1));
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(3), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(3), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(3), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(3), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -249,8 +251,8 @@ public class TestWindowOperator {
Assert.assertEquals((windowPanes.get(1).getMessage()).size(), 2);
Assert.assertEquals((windowPanes.get(2).getMessage()).size(), 2);
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -272,15 +274,15 @@ public class TestWindowOperator {
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
task.init(this.context);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofSeconds(1));
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(2), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(2), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -303,16 +305,16 @@ public class TestWindowOperator {
List<WindowPane<Integer, Collection<IntegerEnvelope>>> windowPanes = new
ArrayList<>();
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
Assert.assertEquals(windowPanes.size(), 1);
Assert.assertEquals(windowPanes.get(0).getKey().getPaneId(), "0");
Assert.assertEquals(windowPanes.get(0).getKey().getKey(), new Integer(1));
Assert.assertEquals(windowPanes.get(0).getFiringType(), FiringType.EARLY);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
Assert.assertEquals(windowPanes.size(), 1);
@@ -324,7 +326,7 @@ public class TestWindowOperator {
Assert.assertEquals(windowPanes.get(1).getKey().getPaneId(), "0");
Assert.assertEquals(windowPanes.get(1).getFiringType(),
FiringType.DEFAULT);
- task.process(new IntegerEnvelope(3), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(3), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofSeconds(1));
task.window(messageCollector, taskCoordinator);
@@ -347,8 +349,8 @@ public class TestWindowOperator {
List<WindowPane<Integer, Collection<IntegerEnvelope>>> windowPanes = new
ArrayList<>();
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
//assert that the count trigger fired
Assert.assertEquals(windowPanes.size(), 1);
@@ -358,9 +360,9 @@ public class TestWindowOperator {
//assert that the triggering of the count trigger cancelled the inner
timeSinceFirstMessage trigger
Assert.assertEquals(windowPanes.size(), 1);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
//advance timer by 500 more millis to enable the default trigger
testClock.advanceTime(Duration.ofMillis(500));
@@ -373,7 +375,7 @@ public class TestWindowOperator {
Assert.assertEquals(windowPanes.get(1).getKey().getPaneId(), "0");
Assert.assertEquals((windowPanes.get(1).getMessage()).size(), 5);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
//advance timer by 500 millis to enable the inner timeSinceFirstMessage
trigger
testClock.advanceTime(Duration.ofMillis(500));
@@ -407,24 +409,24 @@ public class TestWindowOperator {
StreamOperatorTask task = new StreamOperatorTask(sgb, testClock);
task.init(this.context);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
//assert that the count trigger fired
Assert.assertEquals(windowPanes.size(), 1);
//advance the timer to enable the potential triggering of the inner
timeSinceFirstMessage trigger
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(Duration.ofMillis(500));
//assert that the triggering of the count trigger cancelled the inner
timeSinceFirstMessage trigger
task.window(messageCollector, taskCoordinator);
Assert.assertEquals(windowPanes.size(), 2);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
Assert.assertEquals(windowPanes.size(), 3);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
//advance timer by 500 more millis to enable the default trigger
testClock.advanceTime(Duration.ofMillis(500));
task.window(messageCollector, taskCoordinator);
@@ -448,7 +450,7 @@ public class TestWindowOperator {
Assert.assertEquals(windowPanes.size(), 0);
List<Integer> integerList = ImmutableList.of(1, 2, 1, 2, 1);
- integerList.forEach(n -> task.process(new IntegerEnvelope(n),
messageCollector, taskCoordinator));
+ integerList.forEach(n -> task.processAsync(new IntegerEnvelope(n),
messageCollector, taskCoordinator, taskCallback));
// early triggers should emit (1,2) and (1,2) in the same window.
Assert.assertEquals(windowPanes.size(), 2);
@@ -458,7 +460,7 @@ public class TestWindowOperator {
final IncomingMessageEnvelope endOfStream =
IncomingMessageEnvelope.buildEndOfStreamEnvelope(
new SystemStreamPartition("kafka", "integers", new Partition(0)));
- task.process(endOfStream, messageCollector, taskCoordinator);
+ task.processAsync(endOfStream, messageCollector, taskCoordinator,
taskCallback);
// end of stream flushes the last entry (1)
Assert.assertEquals(windowPanes.size(), 3);
@@ -479,18 +481,18 @@ public class TestWindowOperator {
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
testClock.advanceTime(1000);
task.window(messageCollector, taskCoordinator);
Assert.assertEquals(windowPanes.size(), 1);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
final IncomingMessageEnvelope endOfStream =
IncomingMessageEnvelope.buildEndOfStreamEnvelope(
new SystemStreamPartition("kafka", "integers", new Partition(0)));
- task.process(endOfStream, messageCollector, taskCoordinator);
+ task.processAsync(endOfStream, messageCollector, taskCoordinator,
taskCallback);
Assert.assertEquals(windowPanes.size(), 2);
Assert.assertEquals(windowPanes.get(0).getMessage().size(), 2);
verify(taskCoordinator,
times(1)).commit(TaskCoordinator.RequestScope.CURRENT_TASK);
@@ -510,14 +512,14 @@ public class TestWindowOperator {
MessageCollector messageCollector =
envelope -> windowPanes.add((WindowPane<Integer,
Collection<IntegerEnvelope>>) envelope.getMessage());
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
- task.process(new IntegerEnvelope(1), messageCollector, taskCoordinator);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
+ task.processAsync(new IntegerEnvelope(1), messageCollector,
taskCoordinator, taskCallback);
final IncomingMessageEnvelope endOfStream =
IncomingMessageEnvelope.buildEndOfStreamEnvelope(
new SystemStreamPartition("kafka", "integers", new Partition(0)));
- task.process(endOfStream, messageCollector, taskCoordinator);
+ task.processAsync(endOfStream, messageCollector, taskCoordinator,
taskCallback);
Assert.assertEquals(windowPanes.size(), 1);
Assert.assertEquals(windowPanes.get(0).getMessage().size(), 4);
verify(taskCoordinator,
times(1)).commit(TaskCoordinator.RequestScope.CURRENT_TASK);
diff --git
a/samza-core/src/test/java/org/apache/samza/task/TestTaskFactoryUtil.java
b/samza-core/src/test/java/org/apache/samza/task/TestTaskFactoryUtil.java
index 82fb41c..3e2b89b 100644
--- a/samza-core/src/test/java/org/apache/samza/task/TestTaskFactoryUtil.java
+++ b/samza-core/src/test/java/org/apache/samza/task/TestTaskFactoryUtil.java
@@ -111,8 +111,8 @@ public class TestTaskFactoryUtil {
OperatorSpecGraph mockSpecGraph = mock(OperatorSpecGraph.class);
when(mockStreamApp.getOperatorSpecGraph()).thenReturn(mockSpecGraph);
TaskFactory streamTaskFactory =
TaskFactoryUtil.getTaskFactory(mockStreamApp);
- assertTrue(streamTaskFactory instanceof StreamTaskFactory);
- StreamTask streamTask = ((StreamTaskFactory)
streamTaskFactory).createInstance();
+ assertTrue(streamTaskFactory instanceof AsyncStreamTaskFactory);
+ AsyncStreamTask streamTask = ((AsyncStreamTaskFactory)
streamTaskFactory).createInstance();
assertTrue(streamTask instanceof StreamOperatorTask);
verify(mockSpecGraph).clone();
}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/AppWithGlobalConfigExample.java
b/samza-test/src/main/java/org/apache/samza/example/AppWithGlobalConfigExample.java
index 766b529..ee299b7 100644
---
a/samza-test/src/main/java/org/apache/samza/example/AppWithGlobalConfigExample.java
+++
b/samza-test/src/main/java/org/apache/samza/example/AppWithGlobalConfigExample.java
@@ -23,6 +23,8 @@ import java.util.HashMap;
import org.apache.samza.application.StreamApplication;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.config.Config;
+import org.apache.samza.example.models.PageViewCount;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.triggers.Triggers;
import org.apache.samza.operators.windows.AccumulationMode;
@@ -66,37 +68,21 @@ public class AppWithGlobalConfigExample implements
StreamApplication {
KVSerde.of(new StringSerde(), new
JsonSerdeV2<>(PageViewCount.class)));
appDescriptor.getInputStream(inputStreamDescriptor)
- .window(Windows.<PageViewEvent, String, Integer>keyedTumblingWindow(m
-> m.memberId, Duration.ofSeconds(10), () -> 0, (m, c) -> c + 1,
+ .window(Windows.<PageViewEvent, String,
Integer>keyedTumblingWindow(PageViewEvent::getMemberId, Duration.ofSeconds(10),
() -> 0, (m, c) -> c + 1,
null, null)
.setEarlyTrigger(Triggers.repeat(Triggers.count(5)))
.setAccumulationMode(AccumulationMode.DISCARDING), "window1")
- .map(m -> KV.of(m.getKey().getKey(), new PageViewCount(m)))
+ .map(m -> KV.of(m.getKey().getKey(), buildPageViewCount(m)))
.sendTo(appDescriptor.getOutputStream(outputStreamDescriptor));
appDescriptor.withMetricsReporterFactories(new HashMap<>());
}
- class PageViewEvent {
- String pageId;
- String memberId;
- long timestamp;
+ static PageViewCount buildPageViewCount(WindowPane<String, Integer>
windowPane) {
+ String memberId = windowPane.getKey().getKey();
+ long timestamp = Long.valueOf(windowPane.getKey().getPaneId());
+ int count = windowPane.getMessage();
- PageViewEvent(String pageId, String memberId, long timestamp) {
- this.pageId = pageId;
- this.memberId = memberId;
- this.timestamp = timestamp;
- }
- }
-
- static class PageViewCount {
- String memberId;
- long timestamp;
- int count;
-
- PageViewCount(WindowPane<String, Integer> m) {
- this.memberId = m.getKey().getKey();
- this.timestamp = Long.valueOf(m.getKey().getPaneId());
- this.count = m.getMessage();
- }
+ return new PageViewCount(memberId, timestamp, count);
}
}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/AsyncApplicationExample.java
b/samza-test/src/main/java/org/apache/samza/example/AsyncApplicationExample.java
new file mode 100644
index 0000000..9ec1dca
--- /dev/null
+++
b/samza-test/src/main/java/org/apache/samza/example/AsyncApplicationExample.java
@@ -0,0 +1,135 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.example;
+
+import com.google.common.collect.ImmutableList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import org.apache.samza.application.StreamApplication;
+import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
+import org.apache.samza.config.Config;
+import org.apache.samza.example.models.AdClickEvent;
+import org.apache.samza.example.models.EnrichedAdClickEvent;
+import org.apache.samza.example.models.Member;
+import org.apache.samza.operators.KV;
+import org.apache.samza.operators.MessageStream;
+import org.apache.samza.operators.OutputStream;
+import org.apache.samza.runtime.ApplicationRunner;
+import org.apache.samza.runtime.ApplicationRunners;
+import org.apache.samza.serializers.JsonSerdeV2;
+import org.apache.samza.serializers.KVSerde;
+import org.apache.samza.serializers.StringSerde;
+import org.apache.samza.system.kafka.descriptors.KafkaInputDescriptor;
+import org.apache.samza.system.kafka.descriptors.KafkaOutputDescriptor;
+import org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor;
+import org.apache.samza.util.CommandLine;
+
+
+/**
+ * An illustration of use of async APIs in high level application.
+ * The following example demonstrates the use of {@link
MessageStream#flatMapAsync(org.apache.samza.operators.functions.AsyncFlatMapFunction)}.
We use a mock
+ * member decorator service which returns a future in response to decorate
request. Typically, in real world scenarios,
+ * this mock member service will be replaced with rest call to a remote
service.
+ */
+public class AsyncApplicationExample implements StreamApplication {
+
+ @Override
+ public void describe(StreamApplicationDescriptor appDescriptor) {
+ KafkaSystemDescriptor trackingSystem = new
KafkaSystemDescriptor("tracking");
+
+ KafkaInputDescriptor<AdClickEvent> inputStreamDescriptor =
+ trackingSystem.getInputDescriptor("adClickEvent", new
JsonSerdeV2<>(AdClickEvent.class));
+
+ KafkaOutputDescriptor<KV<String, EnrichedAdClickEvent>>
outputStreamDescriptor =
+ trackingSystem.getOutputDescriptor("enrichedAdClickEvent",
+ KVSerde.of(new StringSerde(), new
JsonSerdeV2<>(EnrichedAdClickEvent.class)));
+
+ MessageStream<AdClickEvent> adClickEventStream =
appDescriptor.getInputStream(inputStreamDescriptor);
+ OutputStream<KV<String, EnrichedAdClickEvent>> enrichedAdClickStream =
+ appDescriptor.getOutputStream(outputStreamDescriptor);
+
+ adClickEventStream
+ .flatMapAsync(AsyncApplicationExample::enrichAdClickEvent)
+ .map(enrichedAdClickEvent -> KV.of(enrichedAdClickEvent.getCountry(),
enrichedAdClickEvent))
+ .sendTo(enrichedAdClickStream);
+ }
+
+ public static void main(String[] args) {
+ CommandLine cmdLine = new CommandLine();
+ Config config = cmdLine.loadConfig(cmdLine.parser().parse(args));
+ ApplicationRunner runner = ApplicationRunners.getApplicationRunner(new
AsyncApplicationExample(), config);
+
+ runner.run();
+ runner.waitForFinish();
+ }
+
+ private static CompletionStage<Collection<EnrichedAdClickEvent>>
enrichAdClickEvent(AdClickEvent adClickEvent) {
+ CompletionStage<Member> decoratedMemberFuture =
MemberDecoratorService.decorateMember(adClickEvent.getMemberId());
+ return decoratedMemberFuture
+ .thenApply(member -> Collections.singleton(
+ new EnrichedAdClickEvent(adClickEvent.getId(), member.getGender(),
member.getCountry())));
+ }
+
+ /**
+ * A mock member decorator service that introduces delay to the member
decorate call for illustrating async APIs
+ * use in high level application. In real world, this component would
correspond to a component that makes remote
+ * calls.
+ */
+ private static class MemberDecoratorService {
+ private static final String[] GENDER = {"F", "M", "U"};
+ private static final List<String> COUNTRY = ImmutableList.of(
+ "KENYA",
+ "NEW ZEALAND",
+ "INDONESIA",
+ "PERU",
+ "FRANCE",
+ "MEXICO");
+ private static final Random RANDOM = new Random();
+
+ static CompletionStage<Member> decorateMember(int memberId) {
+ return CompletableFuture.supplyAsync(() -> {
+ /*
+ * Introduce some lag to mimic remote call. In real use cases, this
typically translates to over the wire
+ * network call to some rest service.
+ */
+ try {
+ Thread.sleep((long) (Math.random() * 10000));
+ } catch (InterruptedException ec) {
+ System.out.println("Interrupted during sleep");
+ }
+
+ return new Member(memberId, getRandomGender(), getRandomCountry());
+ });
+ }
+
+ static String getRandomGender() {
+ int index = RANDOM.nextInt(GENDER.length);
+ return GENDER[index];
+ }
+
+ static String getRandomCountry() {
+ int index = RANDOM.nextInt(COUNTRY.size());
+ return COUNTRY.get(index);
+ }
+ }
+}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/BroadcastExample.java
b/samza-test/src/main/java/org/apache/samza/example/BroadcastExample.java
index bf641ce..598e332 100644
--- a/samza-test/src/main/java/org/apache/samza/example/BroadcastExample.java
+++ b/samza-test/src/main/java/org/apache/samza/example/BroadcastExample.java
@@ -22,6 +22,7 @@ package org.apache.samza.example;
import org.apache.samza.application.StreamApplication;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.config.Config;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.MessageStream;
import org.apache.samza.runtime.ApplicationRunner;
@@ -41,7 +42,7 @@ import org.apache.samza.util.CommandLine;
public class BroadcastExample implements StreamApplication {
// local execution mode
- public static void main(String[] args) throws Exception {
+ public static void main(String[] args) {
CommandLine cmdLine = new CommandLine();
Config config = cmdLine.loadConfig(cmdLine.parser().parse(args));
ApplicationRunner runner = ApplicationRunners.getApplicationRunner(new
BroadcastExample(), config);
@@ -67,14 +68,4 @@ public class BroadcastExample implements StreamApplication {
inputStream.filter(m ->
m.key.equals("key2")).sendTo(appDescriptor.getOutputStream(outStream2));
inputStream.filter(m ->
m.key.equals("key3")).sendTo(appDescriptor.getOutputStream(outStream3));
}
-
- class PageViewEvent {
- String key;
- long timestamp;
-
- public PageViewEvent(String key, long timestamp) {
- this.key = key;
- this.timestamp = timestamp;
- }
- }
}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/KeyValueStoreExample.java
b/samza-test/src/main/java/org/apache/samza/example/KeyValueStoreExample.java
index 444039a..4b3ee38 100644
---
a/samza-test/src/main/java/org/apache/samza/example/KeyValueStoreExample.java
+++
b/samza-test/src/main/java/org/apache/samza/example/KeyValueStoreExample.java
@@ -26,6 +26,7 @@ import org.apache.samza.application.StreamApplication;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.config.Config;
import org.apache.samza.context.Context;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.MessageStream;
import org.apache.samza.operators.OutputStream;
@@ -48,7 +49,7 @@ import org.apache.samza.util.CommandLine;
public class KeyValueStoreExample implements StreamApplication {
// local execution mode
- public static void main(String[] args) throws Exception {
+ public static void main(String[] args) {
CommandLine cmdLine = new CommandLine();
Config config = cmdLine.loadConfig(cmdLine.parser().parse(args));
ApplicationRunner runner = ApplicationRunners.getApplicationRunner(new
KeyValueStoreExample(), config);
@@ -73,7 +74,7 @@ public class KeyValueStoreExample implements
StreamApplication {
OutputStream<KV<String, StatsOutput>> pageViewEventPerMember =
appDescriptor.getOutputStream(outputStreamDescriptor);
pageViewEvents
- .partitionBy(pve -> pve.memberId, pve -> pve,
+ .partitionBy(pve -> pve.getMemberId(), pve -> pve,
KVSerde.of(new StringSerde(), new
JsonSerdeV2<>(PageViewEvent.class)), "partitionBy")
.map(KV::getValue)
.flatMap(new MyStatsCounter())
@@ -95,8 +96,8 @@ public class KeyValueStoreExample implements
StreamApplication {
@Override
public Collection<StatsOutput> apply(PageViewEvent message) {
List<StatsOutput> outputStats = new ArrayList<>();
- long wndTimestamp = (long)
Math.floor(TimeUnit.MILLISECONDS.toMinutes(message.timestamp) / 5) * 5;
- String wndKey = String.format("%s-%d", message.memberId, wndTimestamp);
+ long wndTimestamp = (long)
Math.floor(TimeUnit.MILLISECONDS.toMinutes(message.getTimestamp()) / 5) * 5;
+ String wndKey = String.format("%s-%d", message.getMemberId(),
wndTimestamp);
StatsWindowState curState = this.statsStore.get(wndKey);
if (curState == null) {
curState = new StatsWindowState();
@@ -107,7 +108,7 @@ public class KeyValueStoreExample implements
StreamApplication {
curState.timeAtLastOutput = curTimeMs;
curState.lastCount += curState.newCount;
curState.newCount = 0;
- outputStats.add(new StatsOutput(message.memberId, wndTimestamp,
curState.lastCount));
+ outputStats.add(new StatsOutput(message.getMemberId(), wndTimestamp,
curState.lastCount));
}
// update counter w/o generating output
this.statsStore.put(wndKey, curState);
@@ -121,18 +122,6 @@ public class KeyValueStoreExample implements
StreamApplication {
}
}
- class PageViewEvent {
- String pageId;
- String memberId;
- long timestamp;
-
- PageViewEvent(String pageId, String memberId, long timestamp) {
- this.pageId = pageId;
- this.memberId = memberId;
- this.timestamp = timestamp;
- }
- }
-
static class StatsOutput {
private String memberId;
private long timestamp;
diff --git
a/samza-test/src/main/java/org/apache/samza/example/MergeExample.java
b/samza-test/src/main/java/org/apache/samza/example/MergeExample.java
index e3eee23..d4da7a5 100644
--- a/samza-test/src/main/java/org/apache/samza/example/MergeExample.java
+++ b/samza-test/src/main/java/org/apache/samza/example/MergeExample.java
@@ -24,6 +24,7 @@ import com.google.common.collect.ImmutableList;
import org.apache.samza.application.StreamApplication;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.config.Config;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.MessageStream;
import org.apache.samza.runtime.ApplicationRunner;
import org.apache.samza.runtime.ApplicationRunners;
@@ -39,7 +40,7 @@ import org.apache.samza.util.CommandLine;
public class MergeExample implements StreamApplication {
// local execution mode
- public static void main(String[] args) throws Exception {
+ public static void main(String[] args) {
CommandLine cmdLine = new CommandLine();
Config config = cmdLine.loadConfig(cmdLine.parser().parse(args));
ApplicationRunner runner = ApplicationRunners.getApplicationRunner(new
MergeExample(), config);
@@ -67,9 +68,4 @@ public class MergeExample implements StreamApplication {
.mergeAll(ImmutableList.of(appDescriptor.getInputStream(isd1),
appDescriptor.getInputStream(isd2), appDescriptor.getInputStream(isd3)))
.sendTo(appDescriptor.getOutputStream(osd));
}
-
- class PageViewEvent {
- String pageId;
- long viewTimestamp;
- }
}
\ No newline at end of file
diff --git
a/samza-test/src/main/java/org/apache/samza/example/PageViewCounterExample.java
b/samza-test/src/main/java/org/apache/samza/example/PageViewCounterExample.java
index 5fe7b9c..60dc2af 100644
---
a/samza-test/src/main/java/org/apache/samza/example/PageViewCounterExample.java
+++
b/samza-test/src/main/java/org/apache/samza/example/PageViewCounterExample.java
@@ -22,6 +22,8 @@ import java.time.Duration;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.application.StreamApplication;
import org.apache.samza.config.Config;
+import org.apache.samza.example.models.PageViewCount;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.MessageStream;
import org.apache.samza.operators.OutputStream;
@@ -74,34 +76,18 @@ public class PageViewCounterExample implements
StreamApplication {
SupplierFunction<Integer> initialValue = () -> 0;
FoldLeftFunction<PageViewEvent, Integer> foldLeftFn = (m, c) -> c + 1;
pageViewEvents
- .window(Windows.keyedTumblingWindow(m -> m.memberId,
Duration.ofSeconds(10), initialValue, foldLeftFn, null, null)
+ .window(Windows.keyedTumblingWindow(PageViewEvent::getMemberId,
Duration.ofSeconds(10), initialValue, foldLeftFn, null, null)
.setEarlyTrigger(Triggers.repeat(Triggers.count(5)))
.setAccumulationMode(AccumulationMode.DISCARDING),
"tumblingWindow")
- .map(windowPane -> KV.of(windowPane.getKey().getKey(), new
PageViewCount(windowPane)))
+ .map(windowPane -> KV.of(windowPane.getKey().getKey(),
buildPageViewCount(windowPane)))
.sendTo(pageViewEventPerMemberStream);
}
- class PageViewEvent {
- String pageId;
- String memberId;
- long timestamp;
+ static PageViewCount buildPageViewCount(WindowPane<String, Integer>
windowPane) {
+ String memberId = windowPane.getKey().getKey();
+ long timestamp = Long.valueOf(windowPane.getKey().getPaneId());
+ int count = windowPane.getMessage();
- PageViewEvent(String pageId, String memberId, long timestamp) {
- this.pageId = pageId;
- this.memberId = memberId;
- this.timestamp = timestamp;
- }
- }
-
- static class PageViewCount {
- String memberId;
- long timestamp;
- int count;
-
- PageViewCount(WindowPane<String, Integer> m) {
- this.memberId = m.getKey().getKey();
- this.timestamp = Long.valueOf(m.getKey().getPaneId());
- this.count = m.getMessage();
- }
+ return new PageViewCount(memberId, timestamp, count);
}
}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/RepartitionExample.java
b/samza-test/src/main/java/org/apache/samza/example/RepartitionExample.java
index 19403b0..1f5c91b 100644
--- a/samza-test/src/main/java/org/apache/samza/example/RepartitionExample.java
+++ b/samza-test/src/main/java/org/apache/samza/example/RepartitionExample.java
@@ -22,6 +22,7 @@ import java.time.Duration;
import org.apache.samza.application.StreamApplication;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.config.Config;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.KV;
import org.apache.samza.operators.MessageStream;
import org.apache.samza.operators.OutputStream;
@@ -44,7 +45,7 @@ import org.apache.samza.util.CommandLine;
public class RepartitionExample implements StreamApplication {
// local execution mode
- public static void main(String[] args) throws Exception {
+ public static void main(String[] args) {
CommandLine cmdLine = new CommandLine();
Config config = cmdLine.loadConfig(cmdLine.parser().parse(args));
ApplicationRunner runner = ApplicationRunners.getApplicationRunner(new
RepartitionExample(), config);
@@ -69,7 +70,7 @@ public class RepartitionExample implements StreamApplication {
OutputStream<KV<String, MyStreamOutput>> pageViewEventPerMember =
appDescriptor.getOutputStream(outputStreamDescriptor);
pageViewEvents
- .partitionBy(pve -> pve.memberId, pve -> pve,
+ .partitionBy(pve -> pve.getMemberId(), pve -> pve,
KVSerde.of(new StringSerde(), new
JsonSerdeV2<>(PageViewEvent.class)), "partitionBy")
.window(Windows.keyedTumblingWindow(
KV::getKey, Duration.ofMinutes(5), () -> 0, (m, c) -> c + 1, null,
null), "window")
@@ -77,18 +78,6 @@ public class RepartitionExample implements StreamApplication
{
.sendTo(pageViewEventPerMember);
}
- class PageViewEvent {
- String pageId;
- String memberId;
- long timestamp;
-
- PageViewEvent(String pageId, String memberId, long timestamp) {
- this.pageId = pageId;
- this.memberId = memberId;
- this.timestamp = timestamp;
- }
- }
-
static class MyStreamOutput {
String memberId;
long timestamp;
diff --git
a/samza-test/src/main/java/org/apache/samza/example/WindowExample.java
b/samza-test/src/main/java/org/apache/samza/example/WindowExample.java
index 426fd8d..d73b30f 100644
--- a/samza-test/src/main/java/org/apache/samza/example/WindowExample.java
+++ b/samza-test/src/main/java/org/apache/samza/example/WindowExample.java
@@ -23,6 +23,7 @@ import java.time.Duration;
import org.apache.samza.application.StreamApplication;
import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
import org.apache.samza.config.Config;
+import org.apache.samza.example.models.PageViewEvent;
import org.apache.samza.operators.MessageStream;
import org.apache.samza.operators.OutputStream;
import org.apache.samza.operators.functions.FoldLeftFunction;
@@ -80,14 +81,4 @@ public class WindowExample implements StreamApplication {
.map(WindowPane::getMessage)
.sendTo(outputStream);
}
-
- class PageViewEvent {
- String key;
- long timestamp;
-
- public PageViewEvent(String key, long timestamp) {
- this.key = key;
- this.timestamp = timestamp;
- }
- }
}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/models/AdClickEvent.java
b/samza-test/src/main/java/org/apache/samza/example/models/AdClickEvent.java
new file mode 100644
index 0000000..46cf94a
--- /dev/null
+++ b/samza-test/src/main/java/org/apache/samza/example/models/AdClickEvent.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.example.models;
+
+public class AdClickEvent {
+ private int id;
+ private int memberId;
+
+ public AdClickEvent(int id, int memberId) {
+ this.id = id;
+ this.memberId = memberId;
+ }
+
+ public int getId() {
+ return id;
+ }
+
+ public int getMemberId() {
+ return memberId;
+ }
+}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/models/EnrichedAdClickEvent.java
b/samza-test/src/main/java/org/apache/samza/example/models/EnrichedAdClickEvent.java
new file mode 100644
index 0000000..4a3b874
--- /dev/null
+++
b/samza-test/src/main/java/org/apache/samza/example/models/EnrichedAdClickEvent.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.example.models;
+
+public class EnrichedAdClickEvent {
+ private int id;
+ private String gender;
+ private String country;
+
+ public EnrichedAdClickEvent(int id, String gender, String country) {
+ this.id = id;
+ this.gender = gender;
+ this.country = country;
+ }
+
+ public int getId() {
+ return id;
+ }
+
+ public String getGender() {
+ return gender;
+ }
+
+ public String getCountry() {
+ return country;
+ }
+}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/models/Member.java
b/samza-test/src/main/java/org/apache/samza/example/models/Member.java
new file mode 100644
index 0000000..e321bbc
--- /dev/null
+++ b/samza-test/src/main/java/org/apache/samza/example/models/Member.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.example.models;
+
+public class Member {
+ private int memberId;
+ private String gender;
+ private String country;
+
+ public Member(int memberId, String gender, String country) {
+ this.memberId = memberId;
+ this.gender = gender;
+ this.country = country;
+ }
+
+ public int getMemberId() {
+ return memberId;
+ }
+
+ public String getGender() {
+ return gender;
+ }
+
+ public String getCountry() {
+ return country;
+ }
+}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/models/PageViewCount.java
b/samza-test/src/main/java/org/apache/samza/example/models/PageViewCount.java
new file mode 100644
index 0000000..eeb5d24
--- /dev/null
+++
b/samza-test/src/main/java/org/apache/samza/example/models/PageViewCount.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.example.models;
+
+
+public class PageViewCount {
+ private String memberId;
+ private long timestamp;
+ private int count;
+
+ public PageViewCount(String memberId, long timestamp, int count) {
+ this.memberId = memberId;
+ this.timestamp = timestamp;
+ this.count = count;
+ }
+
+ public String getMemberId() {
+ return memberId;
+ }
+
+ public long getTimestamp() {
+ return timestamp;
+ }
+
+ public int getCount() {
+ return count;
+ }
+}
diff --git
a/samza-test/src/main/java/org/apache/samza/example/models/PageViewEvent.java
b/samza-test/src/main/java/org/apache/samza/example/models/PageViewEvent.java
new file mode 100644
index 0000000..fba1bfb
--- /dev/null
+++
b/samza-test/src/main/java/org/apache/samza/example/models/PageViewEvent.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.example.models;
+
+public class PageViewEvent {
+ private String pageId;
+ private String memberId;
+ private long timestamp;
+
+ public PageViewEvent(String pageId, String memberId, long timestamp) {
+ this.pageId = pageId;
+ this.memberId = memberId;
+ this.timestamp = timestamp;
+ }
+
+ public String getPageId() {
+ return pageId;
+ }
+
+ public String getMemberId() {
+ return memberId;
+ }
+
+ public long getTimestamp() {
+ return timestamp;
+ }
+}
diff --git
a/samza-test/src/test/java/org/apache/samza/test/controlmessages/WatermarkIntegrationTest.java
b/samza-test/src/test/java/org/apache/samza/test/controlmessages/WatermarkIntegrationTest.java
index 9436fb2..63dc254 100644
---
a/samza-test/src/test/java/org/apache/samza/test/controlmessages/WatermarkIntegrationTest.java
+++
b/samza-test/src/test/java/org/apache/samza/test/controlmessages/WatermarkIntegrationTest.java
@@ -21,7 +21,6 @@ package org.apache.samza.test.controlmessages;
import scala.collection.JavaConverters;
-import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
@@ -65,7 +64,6 @@ import org.apache.samza.system.SystemConsumer;
import org.apache.samza.system.SystemFactory;
import org.apache.samza.system.SystemProducer;
import org.apache.samza.system.SystemStreamPartition;
-import org.apache.samza.task.AsyncStreamTaskAdapter;
import org.apache.samza.task.StreamOperatorTask;
import org.apache.samza.task.TestStreamOperatorTask;
import org.apache.samza.test.controlmessages.TestData.PageView;
@@ -198,10 +196,7 @@ public class WatermarkIntegrationTest extends
IntegrationTestHarness {
Map<TaskName, TaskInstance> taskInstances =
JavaConverters.mapAsJavaMapConverter(container.getTaskInstances()).asJava();
Map<String, StreamOperatorTask> tasks = new HashMap<>();
for (Map.Entry<TaskName, TaskInstance> entry : taskInstances.entrySet()) {
- AsyncStreamTaskAdapter adapter = (AsyncStreamTaskAdapter)
entry.getValue().task();
- Field field =
AsyncStreamTaskAdapter.class.getDeclaredField("wrappedTask");
- field.setAccessible(true);
- StreamOperatorTask task = (StreamOperatorTask) field.get(adapter);
+ StreamOperatorTask task = (StreamOperatorTask) entry.getValue().task();
tasks.put(entry.getKey().getTaskName(), task);
}
return tasks;
diff --git
a/samza-test/src/test/java/org/apache/samza/test/operator/TestAsyncFlatMap.java
b/samza-test/src/test/java/org/apache/samza/test/operator/TestAsyncFlatMap.java
new file mode 100644
index 0000000..4afff92
--- /dev/null
+++
b/samza-test/src/test/java/org/apache/samza/test/operator/TestAsyncFlatMap.java
@@ -0,0 +1,180 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.samza.test.operator;
+
+import com.google.common.collect.ImmutableList;
+import java.io.Serializable;
+import java.time.Duration;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+import java.util.stream.Collectors;
+import org.apache.samza.SamzaException;
+import org.apache.samza.application.StreamApplication;
+import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
+import org.apache.samza.config.Config;
+import org.apache.samza.config.MapConfig;
+import org.apache.samza.config.StreamConfig;
+import org.apache.samza.config.TaskConfig;
+import org.apache.samza.operators.OutputStream;
+import org.apache.samza.serializers.NoOpSerde;
+import org.apache.samza.system.kafka.descriptors.KafkaOutputDescriptor;
+import org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor;
+import org.apache.samza.test.framework.TestRunner;
+import
org.apache.samza.test.framework.system.descriptors.InMemoryInputDescriptor;
+import
org.apache.samza.test.framework.system.descriptors.InMemoryOutputDescriptor;
+import
org.apache.samza.test.framework.system.descriptors.InMemorySystemDescriptor;
+import org.apache.samza.test.harness.IntegrationTestHarness;
+import org.apache.samza.test.operator.data.PageView;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+
+public class TestAsyncFlatMap extends IntegrationTestHarness {
+ private static final String TEST_SYSTEM = "test";
+ private static final String PAGE_VIEW_STREAM = "test-async-page-view-stream";
+ private static final String NON_GUEST_PAGE_VIEW_STREAM =
"test-async-non-guest-page-view-stream";
+ private static final String FAIL_PROCESS = "process.fail";
+ private static final String FAIL_DOWNSTREAM_OPERATOR =
"downstream.operator.fail";
+ private static final String LOGIN_PAGE = "login-page";
+ private static final String PROCESS_JITTER = "process.jitter";
+
+ private static final List<PageView> PAGE_VIEWS = ImmutableList.of(
+ new PageView("1", LOGIN_PAGE, "1"),
+ new PageView("2", "home-page", "2"),
+ new PageView("3", "profile-page", "0"),
+ new PageView("4", LOGIN_PAGE, "0"));
+
+
+ @Test
+ public void testProcessingFutureCompletesSuccessfully() {
+ List<PageView> expectedPageViews = PAGE_VIEWS.stream()
+ .filter(pageView -> !pageView.getPageId().equals(LOGIN_PAGE) &&
Long.valueOf(pageView.getUserId()) > 0)
+ .collect(Collectors.toList());
+
+ List<PageView> actualPageViews = runTest(PAGE_VIEWS, new HashMap<>());
+ assertEquals("Mismatch between expected vs actual page views",
expectedPageViews, actualPageViews);
+ }
+
+ @Test(expected = SamzaException.class)
+ public void testProcessingFutureCompletesAfterTaskTimeout() {
+ Map<String, String> configs = new HashMap<>();
+ configs.put(TaskConfig.CALLBACK_TIMEOUT_MS(), "100");
+ configs.put(PROCESS_JITTER, "200");
+
+ runTest(PAGE_VIEWS, configs);
+ }
+
+ @Test(expected = RuntimeException.class)
+ public void testProcessingExceptionIsBubbledUp() {
+ Map<String, String> configs = new HashMap<>();
+ configs.put(FAIL_PROCESS, "true");
+
+ runTest(PAGE_VIEWS, configs);
+ }
+
+ @Test(expected = RuntimeException.class)
+ public void testDownstreamOperatorExceptionIsBubbledUp() {
+ Map<String, String> configs = new HashMap<>();
+ configs.put(FAIL_DOWNSTREAM_OPERATOR, "true");
+
+ runTest(PAGE_VIEWS, configs);
+ }
+
+ private List<PageView> runTest(List<PageView> pageViews, Map<String, String>
configs) {
+ configs.put(String.format(StreamConfig.SYSTEM_FOR_STREAM_ID(),
PAGE_VIEW_STREAM), TEST_SYSTEM);
+
+ InMemorySystemDescriptor isd = new InMemorySystemDescriptor(TEST_SYSTEM);
+ InMemoryInputDescriptor<PageView> pageViewStreamDesc = isd
+ .getInputDescriptor(PAGE_VIEW_STREAM, new NoOpSerde<>());
+
+
+ InMemoryOutputDescriptor<PageView> outputStreamDesc = isd
+ .getOutputDescriptor(NON_GUEST_PAGE_VIEW_STREAM, new NoOpSerde<>());
+
+ TestRunner
+ .of(new AsyncFlatMapExample())
+ .addInputStream(pageViewStreamDesc, pageViews)
+ .addOutputStream(outputStreamDesc, 1)
+ .addConfig(new MapConfig(configs))
+ .run(Duration.ofMillis(50000));
+
+ Map<Integer, List<PageView>> result =
TestRunner.consumeStream(outputStreamDesc, Duration.ofMillis(1000));
+ List<PageView> results = result.values().stream()
+ .flatMap(List::stream)
+ .collect(Collectors.toList());
+
+ return results;
+ }
+
+ static class AsyncFlatMapExample implements StreamApplication {
+ @Override
+ public void describe(StreamApplicationDescriptor appDescriptor) {
+ Config config = appDescriptor.getConfig();
+ KafkaSystemDescriptor kafkaSystemDescriptor = new
KafkaSystemDescriptor(TEST_SYSTEM);
+ KafkaOutputDescriptor<PageView>
+ outputDescriptor =
kafkaSystemDescriptor.getOutputDescriptor(NON_GUEST_PAGE_VIEW_STREAM, new
NoOpSerde<>());
+ OutputStream<PageView> nonGuestPageViewStream =
appDescriptor.getOutputStream(outputDescriptor);
+
+ Predicate<PageView> failProcess = (Predicate<PageView> & Serializable)
(ignored) -> config.getBoolean(FAIL_PROCESS, false);
+ Predicate<PageView> failDownstreamOperator = (Predicate<PageView> &
Serializable) (ignored) -> config.getBoolean(FAIL_DOWNSTREAM_OPERATOR, false);
+ Supplier<Long> processJitter = (Supplier<Long> & Serializable) () ->
config.getLong(PROCESS_JITTER, 100);
+
+
appDescriptor.getInputStream(kafkaSystemDescriptor.getInputDescriptor(PAGE_VIEW_STREAM,
new NoOpSerde<PageView>()))
+ .flatMapAsync(pageView -> filterGuestPageViews(pageView,
failProcess, processJitter))
+ .filter(pageView -> filterLoginPageViews(pageView,
failDownstreamOperator))
+ .sendTo(nonGuestPageViewStream);
+ }
+
+ private static CompletionStage<Collection<PageView>>
filterGuestPageViews(PageView pageView,
+ Predicate<PageView> shouldFailProcess, Supplier<Long> processJitter) {
+ CompletableFuture<Collection<PageView>> filteredPageViews =
CompletableFuture.supplyAsync(() -> {
+ try {
+ Thread.sleep(processJitter.get());
+ } catch (InterruptedException ex) {
+ System.out.println("Interrupted during sleep.");
+ }
+
+ return Long.valueOf(pageView.getUserId()) < 1 ?
Collections.emptyList() : Collections.singleton(pageView);
+ });
+
+ if (shouldFailProcess.test(pageView)) {
+ filteredPageViews.completeExceptionally(new RuntimeException("Remote
service threw an exception"));
+ }
+
+ return filteredPageViews;
+ }
+
+ private static boolean filterLoginPageViews(PageView pageView,
Predicate<PageView> shouldFailProcess) {
+ if (shouldFailProcess.test(pageView)) {
+ throw new RuntimeException("Filtering login page views ran into an
exception");
+ }
+
+ return !LOGIN_PAGE.equals(pageView.getPageId());
+ }
+
+ }
+}
diff --git
a/samza-test/src/test/java/org/apache/samza/test/samzasql/TestSamzaSqlRemoteTable.java
b/samza-test/src/test/java/org/apache/samza/test/samzasql/TestSamzaSqlRemoteTable.java
index d962b14..94efa79 100644
---
a/samza-test/src/test/java/org/apache/samza/test/samzasql/TestSamzaSqlRemoteTable.java
+++
b/samza-test/src/test/java/org/apache/samza/test/samzasql/TestSamzaSqlRemoteTable.java
@@ -32,6 +32,7 @@ import org.apache.samza.sql.util.JsonUtil;
import org.apache.samza.sql.util.SamzaSqlTestConfig;
import org.apache.samza.sql.util.RemoteStoreIOResolverTestFactory;
import org.junit.Assert;
+import org.junit.Ignore;
import org.junit.Test;
@@ -53,6 +54,7 @@ public class TestSamzaSqlRemoteTable extends
SamzaSqlIntegrationTestHarness {
}
@Test
+ @Ignore("Disabled due to flakiness related to data generation; Refer Pull
Request #905 for details")
public void testSinkEndToEndWithKeyWithNullRecords() {
int numMessages = 20;
