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/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
package android.gov.nist.javax.sip.stack.timers;
import android.gov.nist.core.CommonLogger;
import android.gov.nist.core.NamingThreadFactory;
import android.gov.nist.core.StackLogger;
import android.gov.nist.javax.sip.SipStackImpl;
import android.gov.nist.javax.sip.stack.SIPStackTimerTask;
import java.util.Properties;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* Implementation of the SIP Timer based on java.util.concurrent.ScheduledThreadPoolExecutor
* Seems to perform
*
* @author [email protected]
*
*/
public class ScheduledExecutorSipTimer implements SipTimer {
private static StackLogger logger = CommonLogger.getLogger(ScheduledExecutorSipTimer.class);
protected SipStackImpl sipStackImpl;
ScheduledThreadPoolExecutor threadPoolExecutor;
public ScheduledExecutorSipTimer() {
threadPoolExecutor = new ScheduledThreadPoolExecutor(1, new NamingThreadFactory("jain_sip_timer_executor"));
}
private void schedulePurgeTaskIfNeeded() {
int purgePeriod = Integer.parseInt(sipStackImpl.getConfigurationProperties().getProperty("android.gov.nist.javax.sip.timers.SCHEDULED_EXECUTOR_PURGE_DELAY", "1"));
if(purgePeriod > 0) {
Runnable r = new Runnable() {
public void run() {
try {
if(logger.isLoggingEnabled(StackLogger.TRACE_DEBUG)) {
logger.logDebug("Purging canceled timer tasks...");
}
threadPoolExecutor.purge();
if(logger.isLoggingEnabled(StackLogger.TRACE_DEBUG)) {
logger.logDebug("Purging canceled timer tasks completed.");
}
}
catch (Exception e) {
logger.logError("failed to execute purge",e);
}
}
};
threadPoolExecutor.scheduleWithFixedDelay(r, purgePeriod, purgePeriod, TimeUnit.MINUTES);
}
}
/* (non-Javadoc)
* @see android.gov.nist.javax.sip.stack.timers.SipTimer#stop()
*/
public void stop() {
threadPoolExecutor.shutdown();
logger.logStackTrace(StackLogger.TRACE_DEBUG);
if(logger.isLoggingEnabled(StackLogger.TRACE_INFO)) {
logger.logInfo("the sip stack timer " + this.getClass().getName() + " has been stopped");
}
}
/* (non-Javadoc)
* @see android.gov.nist.javax.sip.stack.timers.SipTimer#schedule(android.gov.nist.javax.sip.stack.SIPStackTimerTask, long)
*/
public boolean schedule(SIPStackTimerTask task, long delay) {
if(threadPoolExecutor.isShutdown()) {
throw new IllegalStateException("The SIP Stack Timer has been stopped, no new tasks can be scheduled !");
}
ScheduledFuture future = threadPoolExecutor.schedule(new ScheduledSipTimerTask(task), delay, TimeUnit.MILLISECONDS);
task.setSipTimerTask(future);
return true;
}
/*
* (non-Javadoc)
* @see android.gov.nist.javax.sip.stack.timers.SipTimer#scheduleWithFixedDelay(android.gov.nist.javax.sip.stack.SIPStackTimerTask, long, long)
*/
public boolean scheduleWithFixedDelay(SIPStackTimerTask task, long delay,
long period) {
if(threadPoolExecutor.isShutdown()) {
throw new IllegalStateException("The SIP Stack Timer has been stopped, no new tasks can be scheduled !");
}
ScheduledFuture future = threadPoolExecutor.scheduleWithFixedDelay(new ScheduledSipTimerTask(task), delay, period, TimeUnit.MILLISECONDS);
task.setSipTimerTask(future);
return true;
}
/*
* (non-Javadoc)
* @see android.gov.nist.javax.sip.stack.timers.SipTimer#start(android.gov.nist.javax.sip.SipStackImpl, java.util.Properties)
*/
public void start(SipStackImpl sipStack, Properties configurationProperties) {
sipStackImpl= sipStack;
// TODO have a param in the stack properties to set the number of thread for the timer executor
threadPoolExecutor.prestartAllCoreThreads();
schedulePurgeTaskIfNeeded();
if(logger.isLoggingEnabled(StackLogger.TRACE_INFO)) {
logger.logInfo("the sip stack timer " + this.getClass().getName() + " has been started");
}
}
/*
* (non-Javadoc)
* @see android.gov.nist.javax.sip.stack.timers.SipTimer#cancel(android.gov.nist.javax.sip.stack.SIPStackTimerTask)
*/
public boolean cancel(SIPStackTimerTask task) {
boolean cancelled = false;
ScheduledFuture sipTimerTask = (ScheduledFuture) task.getSipTimerTask();
if(sipTimerTask != null) {
task.cleanUpBeforeCancel();
task.setSipTimerTask(null);
threadPoolExecutor.remove((Runnable)sipTimerTask);
cancelled = sipTimerTask.cancel(false);
}
return cancelled;
}
private class ScheduledSipTimerTask implements Runnable {
private SIPStackTimerTask task;
public ScheduledSipTimerTask(SIPStackTimerTask task) {
this.task= task;
}
public void run() {
try {
// task can be null if it has been cancelled
if(task != null) {
task.runTask();
}
} catch (Throwable e) {
System.out.println("SIP stack timer task failed due to exception:");
e.printStackTrace();
}
}
}
/*
* (non-Javadoc)
* @see android.gov.nist.javax.sip.stack.timers.SipTimer#isStarted()
*/
public boolean isStarted() {
return threadPoolExecutor.isTerminated();
}
}
