contrib/src/test/java/org/apache/apex/malhar/contrib/kinesis/KinesisStringOutputOperatorTest.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 com.datatorrent.contrib.kinesis;

import java.util.concurrent.ArrayBlockingQueue;

import com.datatorrent.api.Context.OperatorContext;
import com.datatorrent.api.DAG;
import com.datatorrent.api.DefaultOutputPort;
import com.datatorrent.api.InputOperator;
import com.datatorrent.api.Operator.ActivationListener;

public class KinesisStringOutputOperatorTest extends KinesisOutputOperatorTest< KinesisStringOutputOperator, KinesisStringOutputOperatorTest.StringGeneratorInputOperator >
{
  @Override
  protected StringGeneratorInputOperator addGenerateOperator( DAG dag )
  {
    return dag.addOperator("TestStringGenerator", StringGeneratorInputOperator.class);
    //StringGeneratorInputOperator generator =
  }

  @Override
  protected DefaultOutputPort getOutputPortOfGenerator( StringGeneratorInputOperator generator )
  {
    return generator.outputPort;
  }

  @Override
  protected KinesisStringOutputOperator addTestingOperator(DAG dag)
  {
    return dag.addOperator("KinesisMessageProducer", KinesisStringOutputOperator.class );
  }

  /**
   * Tuple generator for testing.
   */
  public static class StringGeneratorInputOperator implements InputOperator, ActivationListener<OperatorContext>
  {
    public final transient DefaultOutputPort<String> outputPort = new DefaultOutputPort<String>();
    private final transient ArrayBlockingQueue<String> stringBuffer = new ArrayBlockingQueue<String>(1024);
    private volatile Thread dataGeneratorThread;

    @Override
    public void beginWindow(long windowId)
    {
    }

    @Override
    public void endWindow()
    {
    }

    @Override
    public void setup(OperatorContext context)
    {
    }

    @Override
    public void teardown()
    {
    }

    @Override
    public void activate(OperatorContext ctx)
    {
      dataGeneratorThread = new Thread("String Generator")
      {
        @Override
        @SuppressWarnings("SleepWhileInLoop")
        public void run()
        {
          try {
            int i = 0;
            while (dataGeneratorThread != null && i < maxTuple) {
              stringBuffer.put("testString " + (++i));
            }
          }
          catch (Exception ie) {
            throw new RuntimeException(ie);
          }
        }
      };
      dataGeneratorThread.start();
    }

    @Override
    public void deactivate()
    {
      dataGeneratorThread = null;
    }

    @Override
    public void emitTuples()
    {
      for (int i = stringBuffer.size(); i-- > 0;) {
        outputPort.emit(stringBuffer.poll());
      }
    }
  } // End of StringGeneratorInputOperator

}