benchmark/src/main/java/org/apache/apex/benchmark/ApplicationFixed.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.benchmark;

import org.apache.hadoop.conf.Configuration;

import com.datatorrent.api.Context.PortContext;

import com.datatorrent.api.DAG;
import com.datatorrent.api.DAG.Locality;
import com.datatorrent.api.StreamingApplication;

import com.datatorrent.api.annotation.ApplicationAnnotation;

/**
 * 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);
  }
}