org.smartfrog.sfcore.prim
Class LivenessSender

java.lang.Object
  org.smartfrog.sfcore.common.Timer
      org.smartfrog.sfcore.prim.LivenessSender

All Implemented Interfaces:

java.lang.Runnable

public class LivenessSender
extends Timer

Implements sending liveness messages to a liveness targets.

Field Summary

protected static java.lang.ThreadGroup	livenessGroup Thread group for all liveness threads.
protected Liveness	target Target for the liveness messages.

Fields inherited from class org.smartfrog.sfcore.common.Timer

name, stopped, tickDelay, timerThread, waiting

Constructor Summary

LivenessSender(Liveness target, long delay, java.lang.String name)
Constructor.

Method Summary

protected java.lang.Thread	createThread(java.lang.Runnable run, java.lang.String nameTh) Override Timer behavior to make the created thread a daemon thread and part of the liveness thread group.
protected void	timerTick() Timer behaviour.

Methods inherited from class org.smartfrog.sfcore.common.Timer

createThread, doTick, getStopped, getTickDelay, getWaiting, reschedule, run, setName, setTickDelay, start, stop, timerWait

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

livenessGroup

protected static java.lang.ThreadGroup livenessGroup

Thread group for all liveness threads.

target

protected Liveness target

Target for the liveness messages.

Constructor Detail

LivenessSender

public LivenessSender(Liveness target,
                      long delay,
                      java.lang.String name)

Constructor.

Parameters:

target - target for heart beats

delay - wait between heartbeats (in millis)

name - String name

Method Detail

timerTick

protected void timerTick()

Timer behaviour. Send liveness message to target. Target should handle any exceptions in the sfPing method. They are ignored here.

Overrides:

timerTick in class Timer

createThread

protected java.lang.Thread createThread(java.lang.Runnable run,
                                        java.lang.String nameTh)

Override Timer behavior to make the created thread a daemon thread and part of the liveness thread group.

Parameters:

run - interface to run on

nameTh - String name

Returns:

Thread