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//******************************************************************************
//
// File: JobSchedulerRef.java
// Package: edu.rit.pj.cluster
// Unit: Interface edu.rit.pj.cluster.JobSchedulerRef
//
// This Java source file is copyright (C) 2012 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 java.io.IOException;
/**
* Interface JobSchedulerRef specifies the interface for the PJ Job Scheduler
* Daemon process.
*
* @author Alan Kaminsky
* @version 24-Jan-2012
*/
public interface JobSchedulerRef
{
// Exported operations.
/**
* Report that a backend node failed.
*
* @param theJobFrontend Job frontend that is calling this method.
* @param name Backend node name.
*
* @exception IOException
* Thrown if an I/O error occurred.
*/
public void backendFailed
(JobFrontendRef theJobFrontend,
String name)
throws IOException;
/**
* Cancel a job.
*
* @param theJobFrontend Job frontend that is calling this method.
* @param errmsg Error message string.
*
* @exception IOException
* Thrown if an I/O error occurred.
*/
public void cancelJob
(JobFrontendRef theJobFrontend,
String errmsg)
throws IOException;
/**
* Report that a job finished.
*
* @param theJobFrontend Job frontend that is calling this method.
*
* @exception IOException
* Thrown if an I/O error occurred.
*/
public void jobFinished
(JobFrontendRef theJobFrontend)
throws IOException;
/**
* Renew the lease on a job.
*
* @param theJobFrontend Job frontend that is calling this method.
*
* @exception IOException
* Thrown if an I/O error occurred.
*/
public void renewLease
(JobFrontendRef theJobFrontend)
throws IOException;
/**
* Report a comment for a process.
*
* @param theJobFrontend Job frontend that is calling this method.
* @param rank Process rank.
* @param comment Comment string.
*
* @exception IOException
* Thrown if an I/O error occurred.
*/
public void reportComment
(JobFrontendRef theJobFrontend,
int rank,
String comment)
throws IOException;
/**
* Request that a job be scheduled.
*
* @param theJobFrontend Job frontend that is calling this method.
* @param username User name.
* @param Nn Number of backend nodes.
* @param Np Number of processes.
* @param Nt Number of CPUs per process. 0 means "all CPUs."
*
* @exception IOException
* Thrown if an I/O error occurred.
*/
public void requestJob
(JobFrontendRef theJobFrontend,
String username,
int Nn,
int Np,
int Nt)
throws IOException;
/**
* Close communication with this Job Scheduler.
*/
public void close();
}
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