hudson.slaves
Class ChannelPinger

java.lang.Object
  hudson.slaves.ComputerListener
      hudson.slaves.ChannelPinger

All Implemented Interfaces:

ExtensionPoint

@Extension
public class ChannelPinger
extends ComputerListener

Establish a periodic ping to keep connections between slaves and the main Jenkins node alive. This prevents network proxies from terminating connections that are idle for too long.

Since:

1.405

Nested Class Summary

Nested classes/interfaces inherited from interface hudson.ExtensionPoint

ExtensionPoint.LegacyInstancesAreScopedToHudson

Constructor Summary

ChannelPinger()

Method Summary

void	preOnline(Computer c, hudson.remoting.Channel channel, FilePath root, TaskListener listener) Called before a Computer is marked online.

Methods inherited from class hudson.slaves.ComputerListener

all, onConfigurationChange, onLaunchFailure, onOffline, onOnline, onOnline, onTemporarilyOffline, onTemporarilyOnline, preLaunch, register, unregister

Methods inherited from class java.lang.Object

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

Constructor Detail

ChannelPinger

public ChannelPinger()

Method Detail

preOnline

public void preOnline(Computer c,
                      hudson.remoting.Channel channel,
                      FilePath root,
                      TaskListener listener)

Description copied from class: ComputerListener

Called before a Computer is marked online.

This enables you to do some work on all the slaves as they get connected. Unlike ComputerListener.onOnline(Computer, TaskListener), a failure to carry out this function normally will prevent a computer from marked as online.

Overrides:

preOnline in class ComputerListener

channel - This is the channel object to talk to the slave. (This is the same object returned by Computer.getChannel() once it's connected.

root - The directory where this slave stores files. The same as Node.getRootPath(), except that method returns null until the slave is connected. So this parameter is passed explicitly instead.

listener - This is connected to the launch log of the computer. Since this method is called synchronously from the thread that launches a computer, if this method performs a time-consuming operation, this listener should be notified of the progress. This is also a good listener for reporting problems.

See Also:

ComputerListener.onOnline(Computer, TaskListener)