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

import java.util.ArrayList;

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

import com.datatorrent.api.Context.OperatorContext;

import com.datatorrent.api.DefaultOutputPort;
import com.datatorrent.api.InputOperator;

/**
 * <p>FixedTuplesInputOperator class.</p>
 *
 * @since 0.3.2
 */
public class FixedTuplesInputOperator implements InputOperator
{
  public final transient DefaultOutputPort<byte[]> output = new DefaultOutputPort<byte[]>();
  private int count;
  private boolean firstTime;
  private ArrayList<Integer> millis = new ArrayList<Integer>();

  @Override
  public void emitTuples()
  {
    if (firstTime) {
      long start = System.currentTimeMillis();
      for (int i = count; i-- > 0; ) {
        output.emit(new byte[64]);
      }
      firstTime = false;
      millis.add((int)(System.currentTimeMillis() - start));
    }
  }

  @Override
  public void beginWindow(long windowId)
  {
    firstTime = true;
  }

  @Override
  public void endWindow()
  {
    if (millis.size() % 10 == 0) {
      logger.info("millis = {}", millis);
      millis.clear();
    }
  }

  @Override
  public void setup(OperatorContext context)
  {
  }

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

  /**
   * @return the count
   */
  public int getCount()
  {
    return count;
  }

  /**
   * Sets the number of tuples to emit.
   *
   * @param count the number of tuples to emit
   */
  public void setCount(int count)
  {
    this.count = count;
  }

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