samza-test/src/test/java/org/apache/samza/test/framework/MyStreamTestTask.java

/*
 * 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.framework;

import org.apache.samza.context.Context;
import org.apache.samza.system.IncomingMessageEnvelope;
import org.apache.samza.system.OutgoingMessageEnvelope;
import org.apache.samza.system.SystemStream;
import org.apache.samza.task.InitableTask;
import org.apache.samza.task.MessageCollector;
import org.apache.samza.task.StreamTask;
import org.apache.samza.task.TaskCoordinator;


public class MyStreamTestTask implements StreamTask, InitableTask {
  private int multiplier;

  @Override
  public void process(IncomingMessageEnvelope envelope, MessageCollector collector, TaskCoordinator coordinator)
      throws Exception {
    Integer obj = (Integer) envelope.getMessage();
    collector.send(new OutgoingMessageEnvelope(new SystemStream("test", "output"),
        envelope.getKey(), envelope.getKey(), obj * multiplier));
  }

  @Override
  public void init(Context context) throws Exception {
    TestContext testContext = (TestContext) context.getExternalContext();
    multiplier = testContext.getMultiplier();
  }
}