Utils

ASAP became a fairly huge project after a while. Some useful little classes are implemented over some time. Some could be useful in your application. Feel free to use them. Why implementing such little things over and over again.

• AlarmClock
• PeerIDHelper
• StreamLinks

AlarmClock

Distributed systems are often need timeouts. A message is sent to another peer. We expect some result within a given time frame. What would we do in real life? Go to bed and set the alarm. Meet class AlarmClock.

class YourClass implements AlarmClockListener {
... 
    // define constants
    public static final int TASK_0 = 0;
    public static final int TASK_1 = 1;

    // implement AlarmClockListener - what happens after alarm
    public void alarmClockRinging(int yourKey) {
        switch (yourKey) {
            case TASK_0: /* do something */; break;
            case TASK_1: /* do something else */; break;
        }
    }

...
    long timeout0 = 1000;
    // set alarm - your class will be called in 1000 milliseconds
    new AlarmClock(timeout0, TASK_0, this).start();
    // another alarm - 5 seconds
    new AlarmClock(5000, TASK_0, this).start();

PeerIDHelper

StreamLinks