pabloem commented on code in PR #24495:
URL: https://github.com/apache/beam/pull/24495#discussion_r1041497842
##########
sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaReadSchemaTransformProvider.java:
##########
@@ -68,15 +81,22 @@ public List<String> inputCollectionNames() {
@Override
public List<String> outputCollectionNames() {
- return Lists.newArrayList("OUTPUT");
+ return Lists.newArrayList("output");
Review Comment:
correct. Trying to standardize on lowercase
##########
sdks/java/io/kafka/src/test/java/org/apache/beam/sdk/io/kafka/KafkaIOIT.java:
##########
@@ -502,6 +511,103 @@ public void testKafkaWithDelayedStopReadingFunction() {
readElementMetric(readResult, NAMESPACE, READ_ELEMENT_METRIC_NAME));
}
+ public static final Schema KAFKA_TOPIC_SCHEMA =
+ Schema.builder()
+ .addStringField("name")
+ .addInt64Field("userId")
+ .addInt32Field("age")
+ .addBooleanField("ageIsEven")
+ .addDoubleField("temperature")
+ .addArrayField("childrenNames", Schema.FieldType.STRING)
+ .build();
+
+ private static final int FIVE_MINUTES_IN_MS = 5 * 60 * 1000;
+
+ @Test(timeout = FIVE_MINUTES_IN_MS)
+ public void testKafkaViaSchemaTransformJson() {}
Review Comment:
ahhh good catch. we don't have automatic conversion, but I've hardcoded the
json schema
##########
sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaWriteSchemaTransformProvider.java:
##########
@@ -0,0 +1,166 @@
+/*
+ * 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.beam.sdk.io.kafka;
+
+import com.google.auto.value.AutoValue;
+import java.io.Serializable;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import javax.annotation.Nullable;
+import org.apache.beam.sdk.schemas.AutoValueSchema;
+import org.apache.beam.sdk.schemas.Schema;
+import org.apache.beam.sdk.schemas.annotations.DefaultSchema;
+import org.apache.beam.sdk.schemas.transforms.SchemaTransform;
+import org.apache.beam.sdk.schemas.transforms.TypedSchemaTransformProvider;
+import org.apache.beam.sdk.schemas.utils.AvroUtils;
+import org.apache.beam.sdk.schemas.utils.JsonUtils;
+import org.apache.beam.sdk.transforms.MapElements;
+import org.apache.beam.sdk.transforms.PTransform;
+import org.apache.beam.sdk.transforms.SerializableFunction;
+import org.apache.beam.sdk.transforms.SimpleFunction;
+import org.apache.beam.sdk.values.KV;
+import org.apache.beam.sdk.values.PCollectionRowTuple;
+import org.apache.beam.sdk.values.Row;
+import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Sets;
+import org.apache.kafka.common.serialization.ByteArraySerializer;
+import org.checkerframework.checker.initialization.qual.Initialized;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.UnknownKeyFor;
+
+public class KafkaWriteSchemaTransformProvider
+ extends TypedSchemaTransformProvider<
+
KafkaWriteSchemaTransformProvider.KafkaWriteSchemaTransformConfiguration> {
+
+ public static final Set<String> SUPPORTED_FORMATS = Sets.newHashSet("JSON",
"AVRO");
+
+ @Override
+ protected @UnknownKeyFor @NonNull @Initialized
Class<KafkaWriteSchemaTransformConfiguration>
+ configurationClass() {
+ return KafkaWriteSchemaTransformConfiguration.class;
+ }
+
+ @Override
+ protected @UnknownKeyFor @NonNull @Initialized SchemaTransform from(
+ KafkaWriteSchemaTransformConfiguration configuration) {
+ if (!SUPPORTED_FORMATS.contains(configuration.getFormat())) {
+ throw new IllegalArgumentException(
+ "Format "
+ + configuration.getFormat()
+ + " is not supported. "
+ + "Supported formats are: "
+ + String.join(", ", SUPPORTED_FORMATS));
+ }
+ return new KafkaWriteSchemaTransform(configuration);
+ }
+
+ static final class KafkaWriteSchemaTransform implements SchemaTransform,
Serializable {
+ final KafkaWriteSchemaTransformConfiguration configuration;
+
+ KafkaWriteSchemaTransform(KafkaWriteSchemaTransformConfiguration
configuration) {
+ this.configuration = configuration;
+ }
+
+ @Override
+ public @UnknownKeyFor @NonNull @Initialized PTransform<
+ @UnknownKeyFor @NonNull @Initialized PCollectionRowTuple,
+ @UnknownKeyFor @NonNull @Initialized PCollectionRowTuple>
+ buildTransform() {
+ return new PTransform<PCollectionRowTuple, PCollectionRowTuple>() {
+ @Override
+ public PCollectionRowTuple expand(PCollectionRowTuple input) {
+ Schema inputSchema = input.get("input").getSchema();
+ final SerializableFunction<Row, byte[]> toBytesFn =
+ configuration.getFormat().equals("JSON")
+ ? JsonUtils.getRowToJsonBytesFunction(inputSchema)
+ : AvroUtils.getRowToAvroBytesFunction(inputSchema);
+
+ final Map<String, String> configOverrides =
configuration.getProducerConfigUpdates();
+ input
+ .get("input")
+ .apply(
+ "Map Rows to Kafka Messages",
+ MapElements.via(
+ new SimpleFunction<Row, KV<byte[], byte[]>>(
+ row -> KV.of(new byte[1], toBytesFn.apply(row))) {}))
+ .apply(
+ KafkaIO.<byte[], byte[]>write()
+ .withTopic(configuration.getTopic())
+
.withBootstrapServers(configuration.getBootstrapServers())
+ .withProducerConfigUpdates(
+ configOverrides == null
+ ? new HashMap<>()
+ : new HashMap<String, Object>(configOverrides))
+ .withKeySerializer(ByteArraySerializer.class)
+ .withValueSerializer(ByteArraySerializer.class));
+ return PCollectionRowTuple.empty(input.getPipeline());
+ }
+ };
+ }
+ }
+
+ @Override
+ public @UnknownKeyFor @NonNull @Initialized String identifier() {
+ return "beam:schematransform:org.apache.beam:kafka_write:v1";
+ }
+
+ @Override
+ public @UnknownKeyFor @NonNull @Initialized List<@UnknownKeyFor @NonNull
@Initialized String>
+ inputCollectionNames() {
+ return Collections.singletonList("input");
+ }
+
+ @Override
+ public @UnknownKeyFor @NonNull @Initialized List<@UnknownKeyFor @NonNull
@Initialized String>
+ outputCollectionNames() {
+ return Collections.emptyList();
+ }
+
+ @AutoValue
+ @DefaultSchema(AutoValueSchema.class)
+ public abstract static class KafkaWriteSchemaTransformConfiguration
implements Serializable {
Review Comment:
changed it in the design doc.
we've decided to do [datastore][operation]schematransform
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
