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PubNub is a cross-platform client-to-client (1:1 and 1:many) push service in the cloud, capable of broadcasting real-time messages to millions of web and mobile clients simultaneously, in less than a quarter second!
package com.pubnub.api;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Vector;
abstract class TimedTask {
protected int interval;
public abstract void run();
TimedTask(int interval) {
this.setInterval(interval);
}
public int getInterval() {
return interval;
}
public void setInterval(int interval) {
this.interval = interval;
}
}
class TimedTaskWorker implements Runnable{
private TimedTask task;
private Thread thread;
protected volatile boolean _die;
private String name;
protected static Logger log = new Logger(Worker.class);
public Thread getThread() {
return thread;
}
void setThread(Thread thread) {
this.thread = thread;
}
void startWorker() {
thread.start();
}
void interruptWorker() {
thread.interrupt();
}
public TimedTask getTask() {
return task;
}
public void setTask(TimedTask task) {
this.task = task;
}
public int getInterval() {
return task.getInterval();
}
public void setInterval(int interval) {
this.task.setInterval(interval);
}
TimedTaskWorker(String name, TimedTask task) {
this.task = task;
this.name = name;
}
void die() {
_die = true;
}
public void run() {
do {
task.run();
try {
Thread.sleep(task.getInterval() * 1000);
} catch (InterruptedException e) {
}
} while (!_die);
}
}
public class TimedTaskManager {
protected Vector _workers = new Vector();;
private static int count = 0;
private TimedTask voidTask = new TimedTask(1) {
public void run() {}
};
protected static Logger log = new Logger(Worker.class);
public TimedTaskManager(String name) {
}
private void interruptWorkers() {
synchronized(_workers) {
for (int i = 0; i < _workers.size(); i++) {
((TimedTaskWorker)_workers.elementAt(i)).interruptWorker();
}
}
}
public int addTask(String name, TimedTask task) {
TimedTaskWorker w = new TimedTaskWorker(name, task);
w.setThread(new Thread(w, name + "-" + ++count));
_workers.add(w);
log.verbose("Starting new worker " + w.getThread().getName());
w.startWorker();
return w.hashCode();
}
public void removeTask(int hashCode) {
synchronized(_workers) {
for (int i = 0; i < _workers.size(); i++) {
TimedTaskWorker ttw = ((TimedTaskWorker)_workers.elementAt(i));
if (ttw.hashCode() == hashCode) {
ttw.setTask(voidTask);
ttw.die();
ttw.interruptWorker();
_workers.remove(ttw);
}
}
}
}
public void updateTask(int hashCode, TimedTask task) {
synchronized(_workers) {
for (int i = 0; i < _workers.size(); i++) {
TimedTaskWorker ttw = ((TimedTaskWorker)_workers.elementAt(i));
if (ttw.hashCode() == hashCode) {
ttw.setTask(task);
ttw.interruptWorker();
}
}
}
}
public void updateTask(int hashCode, int interval) {
synchronized(_workers) {
for (int i = 0; i < _workers.size(); i++) {
TimedTaskWorker ttw = ((TimedTaskWorker)_workers.elementAt(i));
if (ttw.hashCode() == hashCode) {
ttw.getTask().setInterval(interval);
ttw.interruptWorker();
}
}
}
}
public void stop() {
synchronized(_workers) {
for (int i = 0; i < _workers.size(); i++) {
TimedTaskWorker ttw = ((TimedTaskWorker)_workers.elementAt(i));
ttw.setTask(voidTask);
ttw.die();
ttw.interruptWorker();
_workers.remove(ttw);
}
}
}
}