org.jgroups.util
Class Scheduler
java.lang.Object
org.jgroups.util.Scheduler
- All Implemented Interfaces:
- java.lang.Runnable
- public class Scheduler
- extends java.lang.Object
- implements java.lang.Runnable
Implementation of a priority scheduler. The scheduler maintains a queue to the end of which
all tasks are added. It continually looks at the first queue element, assigns a thread to
it, runs the thread and waits for completion. When a new priority task is added,
it will be added to the head of the queue and the scheduler will be interrupted. In this
case, the currently handled task is suspended, and the one at the head of the queue
handled. This is recursive: a priority task can always be interrupted by another priority
task. Resursion ends when no more priority tasks are added, or when the thread pool is
exhausted.
- Author:
- Bela Ban
Field Summary |
protected static org.apache.commons.logging.Log |
log
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
log
protected static final org.apache.commons.logging.Log log
Scheduler
public Scheduler()
Scheduler
public Scheduler(int num_threads)
setListener
public void setListener(SchedulerListener l)
getConcurrentProcessing
public boolean getConcurrentProcessing()
setConcurrentProcessing
public void setConcurrentProcessing(boolean process_concurrently)
run
public void run()
- Specified by:
run
in interface java.lang.Runnable
addPrio
public void addPrio(java.lang.Runnable task)
add
public void add(java.lang.Runnable task)
start
public void start()
stop
public void stop()
- Stop the scheduler thread. The thread may be waiting for its next task (queue.peek()) or it may be waiting on
the currently executing thread. In the first case, closing the queue will throw a QueueClosed exception which
terminates the scheduler thread. In the second case, after closing the queue, we interrupt the scheduler thread,
which then checks whether the queue is closed. If this is the case, the scheduler thread terminates.
Copyright ? 1998-2005 Bela Ban. All Rights Reserved.