Package org.jenkinsci.test.acceptance.slave

Class SlaveController

java.lang.Object

org.jenkinsci.test.acceptance.po.CapybaraPortingLayerImpl

org.jenkinsci.test.acceptance.slave.SlaveController

All Implemented Interfaces:

Closeable, AutoCloseable, AutoCleaned, CapybaraPortingLayer

Direct Known Subclasses:

LocalSlaveController

public abstract class SlaveController
extends CapybaraPortingLayerImpl
implements Closeable, AutoCleaned

Controls where/how to run slaves.

Jenkins supports different ways of launching slaves, and sometimes this affects behaviours of plugins. This abstraction hides the details of where the slaves are running (local machine? EC2? Docker?) and how slaves are hooked up to Jenkins.

Test authors write tests by injecting SlaveController and calling install(org.jenkinsci.test.acceptance.po.Jenkins).

Author:

Kohsuke Kawaguchi

See Also:

• SlaveProvider

Nested Class Summary

Nested classes/interfaces inherited from class org.jenkinsci.test.acceptance.po.CapybaraPortingLayerImpl

CapybaraPortingLayerImpl.Finder<R>, CapybaraPortingLayerImpl.Resolver

Field Summary

Fields inherited from class org.jenkinsci.test.acceptance.po.CapybaraPortingLayerImpl

driver, injector, LABEL_TO_INPUT_XPATH, time

Fields inherited from interface org.jenkinsci.test.acceptance.po.CapybaraPortingLayer

by

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SlaveController()

Method Summary

Modifier and Type	Method	Description
abstract void	close()	Convey the intention that this machine is no longer needed.
abstract Future<Slave>	install(Jenkins jenkinsToInstallTo)	Uses the given page object to create a new node and connect the slave to that Jenkins instance.
final void	restart()	Just a convenience method for stop+start.
Future<?>	start()	Reconnects a previously stopped slave.
void	stop()	Stops the slave from the slave side, for those slave launch methods that support it.

Methods inherited from class org.jenkinsci.test.acceptance.po.CapybaraPortingLayerImpl

all, blur, check, check, check, choose, clickButton, clickLink, confirmAlert, elasticSleep, executeScript, fillIn, find, findCaption, findCaption, findIfNotVisible, getCurrentUrl, getCurrentUrlWithFragment, getElement, getPageContent, getPageSource, getPageSource, getPath, handleAlert, isHiddenOrStale, isStale, last, lastIfNotVisible, newInstance, resource, runThenConfirmAlert, runThenConfirmAlert, runThenHandleAlert, runThenHandleAlert, runThenHandleDialog, runThenHandleInputDialog, sleep, visit, waitFor, waitFor, waitFor, waitFor, waitFor, waitForCond, waitForCond

Methods inherited from class java.lang.Object

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

Constructor Details

SlaveController

protected SlaveController()

Method Details

install

public abstract Future<Slave> install(Jenkins jenkinsToInstallTo)

Uses the given page object to create a new node and connect the slave to that Jenkins instance.

Since the actual launch of slave can take some time and it often involves a busy loop until the slave gets fully launched, this method returns Future and it can return before the slave is fully connected.

However, this does not mean the setup process can run entirely in another thread, as WebDriver do not support concurrent use by multiple threads.

For example, SSH slaves might synchronously interact with Jenkins to create a slave, and let Jenkins begin connecting to it, but this method would return without waiting for the slave to fully come online. Then later when Future.get() method is invoked, it'll check back the slave status and block until the slave becomes online.

This design improves the speed of connecting multiple slaves.

TODO: for EC2 based providers where there's also another initial delay of allocating a new machine, this abstraction doesn't hide all the latencies sufficiently.

When the Future.get() method returns successfully, the slave is fully online and ready to use.

stop

public void stop()

Stops the slave from the slave side, for those slave launch methods that support it.

Most notably JNLP slaves can control their own lifecycles, and for those slaves this method lets you disconnect this slave. A stopped slave can be later reconnected via start().

start

public Future<?> start()

Reconnects a previously stopped slave.

restart

public final void restart()

Just a convenience method for stop+start.

close

public abstract void close()
                    throws IOException

Convey the intention that this machine is no longer needed. The implementation will releases this machine / recycle the machine, etc.

Once this method is called, no other methods should be called.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException