TaskGenerator.java

/**
 * The MIT License
 * Copyright (c) 2014 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.iluwatar.queue.load.leveling;

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

/**
 * TaskGenerator class.
 * Each TaskGenerator thread will be a Worker which submit's messages to the queue.
 * We need to mention the message count for each of the TaskGenerator threads.
 * 
*/
public class TaskGenerator implements Task, Runnable {

  
  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
  
  // MessageQueue reference using which we will submit our messages.
  private final MessageQueue msgQueue;
  
  // Total message count that a TaskGenerator will submit.
  private final int msgCount;
  
  // Parameterized constructor.
  public TaskGenerator(MessageQueue msgQueue, int msgCount) {
    this.msgQueue = msgQueue;
    this.msgCount = msgCount;
  }
  
  /**
   * Submit messages to the Blocking Queue.
   */
  public void submit(Message msg) {
    try {
      this.msgQueue.submitMsg(msg);
    } catch (Exception e) {
      LOGGER.error(e.getMessage());
    }
  }
  
  /**
   * Each TaskGenerator thread will submit all the messages to the Queue.
   * After every message submission TaskGenerator thread will sleep for 1 second.
   */
  public void run() {
    
    int count = this.msgCount;
    
    try {
      while (count > 0) {
        String statusMsg = "Message-" + count + " submitted by " + Thread.currentThread().getName();
        this.submit(new Message(statusMsg));
        
        LOGGER.info(statusMsg);
        
        // reduce the message count.
        count--;
        
        // Make the current thread to sleep after every Message submission.
        Thread.sleep(1000);
      }
    } catch (InterruptedException ie) {
      LOGGER.error(ie.getMessage());
    } catch (Exception e) {
      LOGGER.error(e.getMessage());
    }
  }
}