| /* |
| * 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.task; |
| |
| import org.apache.samza.config.Config; |
| import org.apache.samza.context.Context; |
| import org.apache.samza.system.IncomingMessageEnvelope; |
| import org.apache.samza.system.OutgoingMessageEnvelope; |
| import org.apache.samza.system.SystemStream; |
| |
| |
| public class IdentityStreamTask implements StreamTask, InitableTask { |
| private int processedMessageCount = 0; |
| private int expectedMessageCount; |
| private String outputTopic; |
| private String outputSystem; |
| |
| @Override |
| public void init(Context context) throws Exception { |
| Config config = context.getJobContext().getConfig(); |
| this.expectedMessageCount = config.getInt("app.messageCount"); |
| this.outputTopic = config.get("app.outputTopic", "output"); |
| this.outputSystem = config.get("app.outputSystem", "test-system"); |
| } |
| |
| @Override |
| public void process( |
| IncomingMessageEnvelope incomingMessageEnvelope, |
| MessageCollector messageCollector, |
| TaskCoordinator taskCoordinator) throws Exception { |
| messageCollector.send( |
| new OutgoingMessageEnvelope( |
| new SystemStream(outputSystem, outputTopic), |
| incomingMessageEnvelope.getMessage())); |
| processedMessageCount++; |
| if (processedMessageCount == expectedMessageCount) { |
| taskCoordinator.shutdown(TaskCoordinator.RequestScope.ALL_TASKS_IN_CONTAINER); |
| } |
| } |
| } |