content: /**
   * 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.examples.throttle;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.datatorrent.api.DefaultOutputPort;
  import com.datatorrent.api.InputOperator;
  import com.datatorrent.common.util.BaseOperator;
  
  /**
   * This is a simple operator that emits random number.
   *
   * @since 3.7.0
   */
  public class RandomNumberGenerator extends BaseOperator implements InputOperator
  {
    private int numTuples = 1000;
    private int origNumTuples = numTuples;
    private transient int count = 0;
  
    private static final Logger logger = LoggerFactory.getLogger(RandomNumberGenerator.class);
  
    public final transient DefaultOutputPort<Double> out = new DefaultOutputPort<Double>();
  
    @Override
    public void beginWindow(long windowId)
    {
      count = 0;
    }
  
    @Override
    public void emitTuples()
    {
      if (count++ < numTuples) {
        out.emit(Math.random());
      }
    }
  
    // Simple suspend and
    public void suspend()
    {
      logger.debug("Slowing down");
      numTuples = 0;
    }
  
    public void normal()
    {
      logger.debug("Normal");
      numTuples = origNumTuples;
    }
  
    public int getNumTuples()
    {
      return numTuples;
    }
  
    /**
     * Sets the number of tuples to be emitted every window.
     * @param numTuples number of tuples
     */
    public void setNumTuples(int numTuples)
    {
      this.numTuples = numTuples;
      this.origNumTuples = numTuples;
    }
  }
  