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https://issues.apache.org/jira/browse/NIFI-589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14581116#comment-14581116
]
ASF GitHub Bot commented on NIFI-589:
-------------------------------------
Github user joey commented on a diff in the pull request:
https://github.com/apache/incubator-nifi/pull/51#discussion_r32168929
--- Diff:
nifi/nifi-nar-bundles/nifi-flume-bundle/nifi-flume-processors/src/main/java/org/apache/nifi/processors/flume/FlumeSinkProcessor.java
---
@@ -0,0 +1,146 @@
+/*
+ * 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.nifi.processors.flume;
+
+import com.google.common.base.Throwables;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import java.util.List;
+import java.util.Set;
+import org.apache.flume.Context;
+import org.apache.flume.EventDeliveryException;
+import org.apache.flume.Sink;
+import org.apache.flume.conf.Configurables;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.annotation.lifecycle.OnUnscheduled;
+
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.Validator;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.SchedulingContext;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+
+/**
+ * This processor runs a Flume sink
+ */
+@Tags({"flume", "hadoop", "get", "sink"})
+@CapabilityDescription("Write FlowFile data to a Flume sink")
+public class FlumeSinkProcessor extends AbstractFlumeProcessor {
+
+ public static final PropertyDescriptor SINK_TYPE = new
PropertyDescriptor.Builder()
+ .name("Sink Type")
+ .description("The fully-qualified name of the Sink class")
+ .required(true)
+ .addValidator(createSinkValidator())
+ .build();
+ public static final PropertyDescriptor AGENT_NAME = new
PropertyDescriptor.Builder()
+ .name("Agent Name")
+ .description("The name of the agent used in the Flume sink
configuration")
+ .required(true)
+ .defaultValue("tier1")
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+ public static final PropertyDescriptor SOURCE_NAME = new
PropertyDescriptor.Builder()
+ .name("Sink Name")
+ .description("The name of the sink used in the Flume sink
configuration")
+ .required(true)
+ .defaultValue("sink-1")
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+ public static final PropertyDescriptor FLUME_CONFIG = new
PropertyDescriptor.Builder()
+ .name("Flume Configuration")
+ .description("The Flume configuration for the sink copied from
the flume.properties file")
+ .required(true)
+ .defaultValue("")
+ .addValidator(Validator.VALID)
+ .build();
+
+ public static final Relationship SUCCESS = new
Relationship.Builder().name("success").build();
+ public static final Relationship FAILURE = new
Relationship.Builder().name("failure").build();
+
+ private List<PropertyDescriptor> descriptors;
+ private Set<Relationship> relationships;
+
+ private volatile Sink sink;
+ private volatile NifiSinkSessionChannel channel;
+
+ @Override
+ protected void init(final ProcessorInitializationContext context) {
+ this.descriptors = ImmutableList.of(SINK_TYPE, AGENT_NAME,
SOURCE_NAME, FLUME_CONFIG);
+ this.relationships = ImmutableSet.of(SUCCESS, FAILURE);
+ }
+
+ @Override
+ protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
+ return descriptors;
+ }
+
+ @Override
+ public Set<Relationship> getRelationships() {
+ return relationships;
+ }
+
+ @OnScheduled
+ public void onScheduled(final SchedulingContext context) {
+ try {
+ channel = new NifiSinkSessionChannel(SUCCESS, FAILURE);
+ Configurables.configure(channel, new Context());
+ channel.start();
+
+ sink =
SINK_FACTORY.create(context.getProperty(SOURCE_NAME).getValue(),
+ context.getProperty(SINK_TYPE).getValue());
+ sink.setChannel(channel);
+
+ String flumeConfig =
context.getProperty(FLUME_CONFIG).getValue();
+ String agentName = context.getProperty(AGENT_NAME).getValue();
+ String sinkName = context.getProperty(SOURCE_NAME).getValue();
+ Configurables.configure(sink,
+ getFlumeSinkContext(flumeConfig, agentName, sinkName));
+
+ sink.start();
+ } catch (Throwable th) {
+ getLogger().error("Error creating sink", th);
+ throw Throwables.propagate(th);
+ }
+ }
+
+ @OnUnscheduled
+ public void unScheduled() {
+ sink.stop();
+ channel.stop();
+ }
+
+ @Override
+ public void onTrigger(final ProcessContext context,
+ final ProcessSession session) throws ProcessException {
+
+ channel.setSession(session);
+ try {
+ if (sink.process() == Sink.Status.BACKOFF) {
--- End diff --
It'd be nice if we could expose the counters that Flume uses internally to
the NiFi UI. If APIs for that don't exist yet, then there's no reason this
feature needs to be blocked by that.
> Add processors that can run Apache Flume sources/sinks
> ------------------------------------------------------
>
> Key: NIFI-589
> URL: https://issues.apache.org/jira/browse/NIFI-589
> Project: Apache NiFi
> Issue Type: New Feature
> Components: Extensions
> Affects Versions: 0.1.0
> Reporter: Joey Echeverria
>
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