/** Activates the policy. Schedules acquire/release tasks with specified period. */
@Override
public BooleanWrapper activate() {
cronScheduler.schedule(
nodeAcquision,
new Runnable() {
public void run() {
logger.info("Acquiring nodes");
thisStub.acquireAllNodes();
}
});
cronScheduler.schedule(
nodeRemoval,
new Runnable() {
public void run() {
logger.info("Removing nodes");
thisStub.removeAllNodes(preemptive);
}
});
cronScheduler.start();
if (forceDeployment) {
logger.info("Acquiring nodes");
thisStub.acquireAllNodes();
}
return new BooleanWrapper(true);
}
public static final void init(File dir) {
if (dir == null || dir.listFiles() == null) return;
scheduler = new Scheduler();
scheduler.setDaemon(true);
for (File file : dir.listFiles()) {
scheduler.scheduleFile(file);
}
scheduler.start();
}
public static void main(String[] args) {
// Prepares the listener.
MySchedulerListener listener = new MySchedulerListener();
// Prepares the task.
MyTask task = new MyTask();
// Creates the scheduler.
Scheduler scheduler = new Scheduler();
// Registers the listener.
scheduler.addSchedulerListener(listener);
// Schedules the task, once every minute.
scheduler.schedule("* * * * *", task);
// Starts the scheduler.
scheduler.start();
// Stays alive for five minutes.
try {
Thread.sleep(5L * 60L * 1000L);
} catch (InterruptedException e) {;
}
// Stops the scheduler.
scheduler.stop();
}
public static final void destroy() {
if (scheduler != null) scheduler.stop();
}
/** Shutdown the policy and clears the timer. */
@Override
public void shutdown(Client initiator) {
cronScheduler.stop();
super.shutdown(initiator);
}