svn-gvsig-desktop / tags / v1_0_2_Build_907 / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / engine / internalExceptions / Timer.java @ 11015
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package com.hardcode.gdbms.engine.internalExceptions; |
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/**
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* Reseteable timer. After a cancelTimer or after the execution of the
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* scheduled task the object becomes unuseful: It's not possible to schedule
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* more tasks
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class Timer { |
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private boolean cancel = false; |
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private Thread timerThread; |
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/**
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* schedules a task
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*
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* @param task task to schedule
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* @param delay delay in milliseconds
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*/
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public void schedule(Task task, long delay) { |
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timerThread = new Thread(new TimerThread(delay, task)); |
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timerThread.start(); |
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} |
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/**
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* restarts the timer
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*/
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public void resetTimer() { |
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cancel = false;
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if (timerThread != null) |
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timerThread.interrupt(); |
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} |
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/**
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* cancels the timer. It causes the timer to be unuseful. After this call
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* you cannot schedule more tasks
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*/
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public void cancelTimer() { |
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cancel = true;
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timerThread.interrupt(); |
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} |
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/**
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* timer thread
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class TimerThread implements Runnable { |
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long timeout;
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Task task; |
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/**
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* Creates a new TimerThread.
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*
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* @param timeout delay in milliseconds
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* @param task task to schedule
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*/
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public TimerThread(long timeout, Task task) { |
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this.timeout = timeout;
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this.task = task;
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} |
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/**
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* @see java.lang.Runnable#run()
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*/
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public synchronized void run() { |
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while (true) { |
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try {
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// Waits the delay
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wait(timeout); |
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//executes the task
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task.execute(); |
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//exits
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break;
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} catch (InterruptedException e) { |
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if (cancel) {
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break;
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} else {
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//Volvemos a esperar
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} |
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} |
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} |
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} |
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} |
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} |