org.jgap.impl.job.SimpleJobConsumer Maven / Gradle / Ivy

/*
 * This file is part of JGAP.
 *
 * JGAP offers a dual license model containing the LGPL as well as the MPL.
 *
 * For licensing information please see the file license.txt included with JGAP
 * or have a look at the top of class org.jgap.Chromosome which representatively
 * includes the JGAP license policy applicable for any file delivered with JGAP.
 */
package org.jgap.impl.job;

import java.util.*;
import org.jgap.*;
import org.jgap.impl.*;
import org.jgap.distr.*;

/**
 * Sample implementation of a service that generates jobs, takes them, executes
 * them, receives results from finished jobs and merges the results in order to
 * start a new round of evolution.
 *
 * @author Klaus Meffert
 * @since 3.2
 */
public class SimpleJobConsumer {

  /** String containing the CVS revision. Read out via reflection!*/
  private final static String CVS_REVISION = "$Revision: 1.6 $";

  private List m_jobs = new Vector();
  private List m_results = new Vector();

  public void pushJobToGrid(IJob a_job) {
    m_jobs.add(a_job);
    // Execute the job asynchronously.
    // -------------------------------
    new Thread(a_job).start();
  }

  public void waitForAllJobs() {
    while (true) {
      if (m_jobs.size() < 1) {
        break;
      }
      try {
        Thread.sleep(50);
      } catch (InterruptedException iex) {
        iex.printStackTrace();
        break;
      }
      Iterator it = m_jobs.iterator();
      while (it.hasNext()) {
        IJob job = (IJob)it.next();
        if (job.isFinished()) {
          System.out.println("Another job finished!");
          m_results.add(job.getResult());
          it.remove();
        }
      }
    }
  }

  public EvolveResult[] getResults() {
    int size = m_results.size();
    if (size < 1) {
      throw new IllegalStateException("No results found!");
    }
    EvolveResult[] results = new EvolveResult[size];
    for(int i=0;i