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|
package upload.job;
import java.util.* ;
public class JobScheduler
{
private Vector pending_jobs ;
private Vector pending_priority_jobs ;
private boolean running = true ;
public boolean paused = false ;
private boolean started = false ;
private JobSchedulerThread[] thread ;
/** Creates a new instance of JobScheduler */
public JobScheduler( String name )
{
this( name , 1 ) ;
}
public JobScheduler( String name , int nb_threads )
{
thread = new JobSchedulerThread[ nb_threads ] ;
for ( int i=0 ; i<nb_threads ; i++ )
{
thread[ i ] = new JobSchedulerThread( name + "-" + i , this ) ; // [NOLOC]
}
pending_jobs = new Vector() ;
pending_priority_jobs = new Vector() ;
}
public void setPriority( int priority )
{
for ( int i=0 ; i<thread.length ; i++ )
{
thread[ i ].setPriority( priority ) ;
}
}
public synchronized void addJob( Job job )
{
pending_jobs.addElement( job ) ;
if (! started)
{
started = true ;
start() ;
}
else
{
notify() ;
}
}
public synchronized void insertJob( Job job )
{
pending_jobs.insertElementAt( job , 0 ) ;
if (! started)
{
started = true ;
start() ;
}
else
{
notify() ;
}
}
public synchronized void clearJobs()
{
pending_jobs.removeAllElements() ;
pending_priority_jobs.removeAllElements() ;
}
public synchronized void priorizeJob( Job job )
{
if (pending_jobs.contains( job ))
{
pending_jobs.removeElement( job ) ;
pending_priority_jobs.addElement( job ) ;
}
}
public synchronized void start()
{
for ( int i=0 ; i<thread.length ; i++ )
thread[ i ].start() ;
}
public Object getLock()
{
return this ;
}
public boolean isRunning()
{
return running ;
}
public boolean isPaused()
{
return paused ;
}
public void setPaused( boolean paused )
{
this.paused = paused ;
synchronized (this)
{ notifyAll() ; }
}
public synchronized void removeAllJobs()
{
pending_jobs.removeAllElements() ;
pending_priority_jobs.removeAllElements() ;
}
public synchronized void removeJob( Job job )
{
pending_jobs.removeElement( job ) ;
pending_priority_jobs.removeElement( job ) ;
}
public synchronized Job nextJob()
{
if ( ( ( (pending_priority_jobs.size() == 0) && (pending_jobs.size() == 0) ) || paused) && running) try
{ wait() ; } catch (InterruptedException ie) {}
if (! running) return null ;
if (paused) return null ;
Job job = null ;
if (pending_priority_jobs.size() > 0)
{
job = (Job) pending_priority_jobs.elementAt( 0 ) ;
removeJob( 0 , job ) ;
}
else if (pending_jobs.size() > 0)
{
job = (Job) pending_jobs.elementAt( 0 ) ;
removeJob( 0 , job ) ;
}
return job ;
}
protected synchronized void removeJob( int index , Job job )
{
pending_priority_jobs.removeElement( job ) ;
pending_jobs.removeElement( job ) ;
}
public synchronized void finish()
{
running = false ;
synchronized (this)
{ notifyAll() ; }
for ( int i=0 ; i<thread.length ; i++ )
{
try
{ thread[ i ].kill() ; } catch (Throwable t)
{}
}
for ( int i=0 ; i<thread.length ; i++ )
{
try
{ thread[ i ].join() ; } catch (InterruptedException ie)
{}
}
}
public synchronized void exitFinish()
{
finish() ;
}
public synchronized void exitNotify()
{
running = false ;
synchronized (this)
{ notifyAll() ; }
}
public boolean isProcessing()
{
if ( (pending_jobs.size() > 0) || (pending_priority_jobs.size() > 0) ) return true ;
else
{
for ( int i=0 ; i<thread.length ; i++ )
{
if (thread[ i ].isProcessingJob()) return true ;
}
}
return false ;
}
protected void jobFinished( Job job )
{
}
public int getPendingJobCount()
{
return pending_jobs.size() + pending_priority_jobs.size() ;
}
} |
