Examples of java.util.Timer$TimerImpl$TimerTree

java.util.Timer
Timers are used to schedule jobs for execution in a background process. A single thread is used for the scheduling and this thread has the option of being a daemon thread. By calling cancel you can terminate a timer and it's associated thread. All tasks which are scheduled to run after this point are cancelled. Tasks are executed sequentially but are subject to the delays from other tasks run methods. If a specific task takes an excessive amount of time to run it may impact the time at which subsequent tasks may run.
The Timer task does not offer any guarantees about the real-time nature of scheduling tasks as it's underlying implementation relies on the Object.wait(long) method.
Multiple threads can share a single Timer without the need for their own synchronization. @see TimerTask @see java.lang.Object#wait(long)

    _sipFactory = (SipFactory) getServletContext().getAttribute(SipServlet.SIP_FACTORY);
    _bindings = new HashMap<String, SortedSet<Binding>>();
    
    getServletContext().setAttribute(Binding.class.getName(), _bindings);
    
    _timer = new Timer();
    _timer.scheduleAtFixedRate(new BindingScavenger(), 5000, 5000);
    
    _dateFormat = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss z", Locale.US);
    _dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
  }

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            if (Log.isDebugEnabled())
                Log.debug("starting local scavenger thread...(period: " + getScavengerPeriod() + " secs)");
            long delay = getScavengerPeriod() * 1000;
            boolean isDaemon = true;
            _scavenger = new Timer(isDaemon);
            _scavenger.scheduleAtFixedRate(new Scavenger(), delay, delay);
            Log.debug("...local scavenger thread started");
            _started = true;
        }

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    // Store LifeCycle
    public void start() throws Exception
    {
        boolean isDaemon = true;
        _scavenger = new Timer(isDaemon);
        long delay = _scavengerPeriod
                + Math.round(Math.random() * _scavengerPeriod);
        if (Log.isDebugEnabled())
          Log.debug("starting distributed scavenger thread...(period: "
                    + delay + " secs)");

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    public List<Member> getMembers(){
        return this.activeMembers;
    }


    public void startApplicationMembershipTimer(){
        Timer timer = new Timer();
        timer.scheduleAtFixedRate(new MemberActivatorTask(), 1000, 500);
    }

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        if (messageQueue.isPersistent()) {
            log.info("Loading the persisted messages if there are any to the message queue");
            messageQueue.load();
        }


        Timer samplingTimer = synapseEnvironment.getSynapseConfiguration().getSynapseTimer();
        messageProcessor = new MessageProcessor();
        log.info("Scheduling the sampling timer to invoke the message processor " +
                "at an interval of : " + unitTime);
        samplingTimer.schedule(messageProcessor, 0, unitTime);
    }

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      long cacheRefreshDelay, String refreshThreadName, SnapshotFileInspector inspectSnapshotFiles) {
    this.fs = fs;
    this.fileInspector = inspectSnapshotFiles;
    this.snapshotDir = SnapshotDescriptionUtils.getSnapshotsDir(rootDir);
    // periodically refresh the file cache to make sure we aren't superfluously saving files.
    this.refreshTimer = new Timer(refreshThreadName, true);
    this.refreshTimer.scheduleAtFixedRate(new RefreshCacheTask(), cacheRefreshDelay,
      cacheRefreshPeriod);
  }

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    /**
     * Starts timer if it is not already started
     */
    private synchronized void startTimer() {
         if (timer == null) {
            timer = new Timer();
            TimerTask task = new TimerTask() {
                public void run() {
                  try {
                    timerEvent();
                  }

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    //GBeanLifeCycle
    public synchronized void doStart() throws Exception {
        load();
        if (!readOnly) {
            timer = new Timer(true);
        }
        log.debug("Started LocalAttributeManager with data on " + serverOverride.getConfigurations().size() + " configurations");
    }

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            }


            synchronized (this) {
                reconfigure();


                timer = new Timer(true);


                // Periodically check the configuration file
                schedule();
            }

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        this.executor = executor;
        this.transactionManager = transactionManager;
    }


    public void doStart() throws Exception {
        delegate = new Timer(true);
    }

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