benchmark/src/main/java/com/datatorrent/benchmark/ApplicationFixed.java

/*
 * Copyright (c) 2014 DataTorrent, Inc. ALL Rights Reserved.
 *
 * Licensed 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.benchmark;

import com.datatorrent.api.StreamingApplication;
import com.datatorrent.api.DAG;
import com.datatorrent.api.Context.PortContext;
import com.datatorrent.api.DAG.Locality;
import com.datatorrent.api.annotation.ApplicationAnnotation;

import org.apache.hadoop.conf.Configuration;

/**
 * Example of application configuration in Java.
 * <p>
 * Measures the time taken to emit a fixed number of tuples.
 * </p>
 *
 * @since 0.3.2
 */
@ApplicationAnnotation(name="PerformanceBenchmarkForFixedNumberOfTuples")
public class ApplicationFixed implements StreamingApplication
{
  private final Locality locality = null;
  public static final int QUEUE_CAPACITY = 16 * 1024;

  @Override
  public void populateDAG(DAG dag, Configuration conf)
  {
    FixedTuplesInputOperator wordGenerator = dag.addOperator("WordGenerator", FixedTuplesInputOperator.class);
    dag.getMeta(wordGenerator).getMeta(wordGenerator.output).getAttributes().put(PortContext.QUEUE_CAPACITY, QUEUE_CAPACITY);
    wordGenerator.setCount(500000);

    WordCountOperator<byte[]> counter = dag.addOperator("Counter", new WordCountOperator<byte[]>());
    dag.getMeta(counter).getMeta(counter.input).getAttributes().put(PortContext.QUEUE_CAPACITY, QUEUE_CAPACITY);

    dag.addStream("Generator2Counter", wordGenerator.output, counter.input).setLocality(locality);
  }
}