File: ProcessInfo.java

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//******************************************************************************
//
// File:    ProcessInfo.java
// Package: edu.rit.pj.cluster
// Unit:    Class edu.rit.pj.cluster.ProcessInfo
//
// This Java source file is copyright (C) 2008 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This Java source file is part of the Parallel Java Library ("PJ"). PJ is free
// software; you can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// PJ is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// Linking this library statically or dynamically with other modules is making a
// combined work based on this library. Thus, the terms and conditions of the
// GNU General Public License cover the whole combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent modules, and
// to copy and distribute the resulting executable under terms of your choice,
// provided that you also meet, for each linked independent module, the terms
// and conditions of the license of that module. An independent module is a
// module which is not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the library, but
// you are not obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************

package edu.rit.pj.cluster;

import edu.rit.util.Timer;

import java.net.InetSocketAddress;

/**
 * Class ProcessInfo provides a record of information about one job backend
 * process in the PJ cluster middleware.
 *
 * @author  Alan Kaminsky
 * @version 21-May-2008
 */
public class ProcessInfo
	{

// Exported enumerations.

	/**
	 * The state of a job backend process.
	 */
	public static enum State
		{
		/**
		 * The job backend process has not started yet.
		 */
		NOT_STARTED ("Not started"),

		/**
		 * The job backend process is running.
		 */
		RUNNING ("Running"),

		/**
		 * The job backend process has finished.
		 */
		FINISHED ("Finished"),

		/**
		 * The job backend process has failed.
		 */
		FAILED ("Failed");

		private final String stringForm;

		/**
		 * Construct a new State value.
		 *
		 * @param  stringForm  String form.
		 */
		State
			(String stringForm)
			{
			this.stringForm = stringForm;
			}

		/**
		 * Returns a string version of this State value.
		 *
		 * @return  String version.
		 */
		public String toString()
			{
			return stringForm;
			}
		}

// Exported data members.

	/**
	 * The job backend process's state.
	 */
	public State state;

	/**
	 * The job backend node's name.
	 */
	public String name;

	/**
	 * The job backend process's rank.
	 */
	public int rank;

	/**
	 * Reference to the job backend process.
	 */
	public JobBackendRef backend;

	/**
	 * Host/port to which the job backend process is listening for middleware
	 * messages.
	 */
	public InetSocketAddress middlewareAddress;

	/**
	 * Host/port to which the job backend process is listening for the world
	 * communicator.
	 */
	public InetSocketAddress worldAddress;

	/**
	 * Host/port to which the job backend process is listening for the frontend
	 * communicator, or null if the frontend communicator does not exist.
	 */
	public InetSocketAddress frontendAddress;

	/**
	 * Lease renewal timer.
	 */
	public Timer renewTimer;

	/**
	 * Lease expiration timer.
	 */
	public Timer expireTimer;

	/**
	 * Number of CPUs assigned to the job backend process.
	 */
	public int Nt;

// Exported constructors.

	/**
	 * Construct a new job information record.
	 *
	 * @param  state
	 *     The job backend process's state.
	 * @param  name
	 *     The job backend processor's name.
	 * @param  rank
	 *     The job backend process's rank.
	 * @param  backend
	 *     Reference to the job backend process.
	 * @param  middlewareAddress
	 *     Host/port to which the job backend process is listening for
	 *     middleware messages.
	 * @param  worldAddress
	 *     Host/port to which the job backend process is listening for the world
	 *     communicator.
	 * @param  frontendAddress
	 *     Host/port to which the job backend process is listening for the
	 *     frontend communicator, or null if the frontend communicator does not
	 *     exist.
	 * @param  renewTimer
	 *     Lease renewal timer.
	 * @param  expireTimer
	 *     Lease expiration timer.
	 * @param  Nt
	 *     Number of CPUs assigned to the job backend process.
	 */
	public ProcessInfo
		(State state,
		 String name,
		 int rank,
		 JobBackendRef backend,
		 InetSocketAddress middlewareAddress,
		 InetSocketAddress worldAddress,
		 InetSocketAddress frontendAddress,
		 Timer renewTimer,
		 Timer expireTimer,
		 int Nt)
		{
		this.state = state;
		this.name = name;
		this.rank = rank;
		this.backend = backend;
		this.middlewareAddress = middlewareAddress;
		this.worldAddress = worldAddress;
		this.frontendAddress = frontendAddress;
		this.renewTimer = renewTimer;
		this.expireTimer = expireTimer;
		this.Nt = Nt;
		}

	}