hudson.slaves
Class DelegatingComputerLauncher

java.lang.Object
  hudson.model.AbstractDescribableImpl<ComputerLauncher>
      hudson.slaves.ComputerLauncher
          hudson.slaves.DelegatingComputerLauncher

All Implemented Interfaces:

ExtensionPoint, Describable<ComputerLauncher>

public abstract class DelegatingComputerLauncher
extends ComputerLauncher

Convenient base implementation of ComputerLauncher that allows subtypes to perform some initialization (typically something cloud/v12n related to power up the machine), then to delegate to another ComputerLauncher to connect.

Since:

1.382

Author:

Kohsuke Kawaguchi

Nested Class Summary

static class

DelegatingComputerLauncher.DescriptorImpl

Nested classes/interfaces inherited from interface hudson.ExtensionPoint

ExtensionPoint.LegacyInstancesAreScopedToHudson

Field Summary

protected ComputerLauncher

launcher

Fields inherited from class hudson.slaves.ComputerLauncher

LIST

Constructor Summary

protected

DelegatingComputerLauncher(ComputerLauncher launcher)

Method Summary

void	afterDisconnect(SlaveComputer computer, TaskListener listener) Allows the ComputerLauncher to tidy-up after a disconnect.
void	beforeDisconnect(SlaveComputer computer, TaskListener listener) Allows the ComputerLauncher to prepare for a disconnect.
ComputerLauncher	getLauncher()
void	launch(SlaveComputer computer, TaskListener listener) Launches the slave agent for the given Computer.

Methods inherited from class hudson.slaves.ComputerLauncher

afterDisconnect, beforeDisconnect, checkJavaVersion, isLaunchSupported, launch

Methods inherited from class hudson.model.AbstractDescribableImpl

getDescriptor

Methods inherited from class java.lang.Object

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

Field Detail

launcher

protected ComputerLauncher launcher

Constructor Detail

DelegatingComputerLauncher

protected DelegatingComputerLauncher(ComputerLauncher launcher)

Method Detail

getLauncher

public ComputerLauncher getLauncher()

launch

public void launch(SlaveComputer computer,
                   TaskListener listener)
            throws IOException,
                   InterruptedException

Description copied from class: ComputerLauncher

Launches the slave agent for the given Computer.

If the slave agent is launched successfully, SlaveComputer.setChannel(InputStream, OutputStream, TaskListener, Channel.Listener) should be invoked in the end to notify Hudson of the established connection. The operation could also fail, in which case there's no need to make any callback notification, (except to notify the user of the failure through StreamTaskListener.) Also note that the normal return of this method call does not necessarily signify a successful launch. If someone programmatically calls this method and wants to find out if the launch was a success, use Computer.isOnline() at the end.

This method must operate synchronously. Asynchrony is provided by Computer.connect(boolean) and its correct operation depends on this.

Overrides:

launch in class ComputerLauncher

listener - The progress of the launch, as well as any error, should be sent to this listener.

Throws:

IOException - if the method throws an IOException or InterruptedException, the launch was considered a failure and the stack trace is reported into the listener. This handling is just so that the implementation of this method doesn't have to dilligently catch those exceptions.

InterruptedException

afterDisconnect

public void afterDisconnect(SlaveComputer computer,
                            TaskListener listener)

Description copied from class: ComputerLauncher

Allows the ComputerLauncher to tidy-up after a disconnect.

This method is invoked after the Channel to this computer is terminated.

Disconnect operation is performed asynchronously, so there's no guarantee that the corresponding SlaveComputer exists for the duration of the operation.

Overrides:

afterDisconnect in class ComputerLauncher

beforeDisconnect

public void beforeDisconnect(SlaveComputer computer,
                             TaskListener listener)

Description copied from class: ComputerLauncher

Allows the ComputerLauncher to prepare for a disconnect.

This method is invoked before the Channel to this computer is terminated, thus the channel is still accessible from SlaveComputer.getChannel(). If the channel is terminated unexpectedly, this method will not be invoked, as the channel is already gone.

Disconnect operation is performed asynchronously, so there's no guarantee that the corresponding SlaveComputer exists for the duration of the operation.

Overrides:

beforeDisconnect in class ComputerLauncher