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

/*
 * To change this template, choose Tools | Templates and open the template in the editor.
 */

import java.util.ArrayList;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.datatorrent.api.Context.OperatorContext;

import com.datatorrent.api.DefaultInputPort;
import com.datatorrent.api.Operator;

/**
 * <p>WordCountOperator class.</p>
 *
 * @since 0.3.2
 */
public class WordCountOperator<T> implements Operator
{
  public final transient DefaultInputPort<T> input = new DefaultInputPort<T>()
  {
    @Override
    public void process(T tuple)
    {
      WordCountOperator.this.count++;
    }

  };
  private transient ArrayList<Integer> counts;
  private transient int count;
  private long startmillis;
  private ArrayList<Integer> millis;

  @Override
  public void endWindow()
  {
    counts.add(count);
    millis.add((int)(System.currentTimeMillis() - startmillis));
    count = 0;

    if (counts.size() % 10 == 0) {
      logger.info("millis = {}", millis);
      logger.info("counts = {}", counts);
      millis.clear();
      counts.clear();
    }
  }

  @Override
  public void teardown()
  {
    logger.info("millis = {}", millis);
    logger.info("counts = {}", counts);
  }

  @Override
  public void beginWindow(long windowId)
  {
    startmillis = System.currentTimeMillis();
  }

  @Override
  public void setup(OperatorContext context)
  {
    counts = new ArrayList<Integer>();
    millis = new ArrayList<Integer>();
  }

  private static final Logger logger = LoggerFactory.getLogger(WordCountOperator.class);
}