Class SCMListener

  extended by hudson.model.listeners.SCMListener
All Implemented Interfaces:

public abstract class SCMListener
extends Object
implements ExtensionPoint

Receives notifications about SCM activities in Hudson.

This is an abstract class so that methods added in the future won't break existing listeners.

Once instanciated, use the register() method to start receiving events.

Kohsuke Kawaguchi
See Also:

Nested Class Summary
Nested classes/interfaces inherited from interface hudson.ExtensionPoint
Constructor Summary
Method Summary
 void onChangeLogParsed(AbstractBuild<?,?> build, BuildListener listener, ChangeLogSet<?> changelog)
          Called once the changelog is determined.
 void register()
          Registers this SCMListener so that it will start receiving events.
 boolean unregister()
          Unregisters this SCMListener so that it will never receive further events.
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public SCMListener()
Method Detail


public void onChangeLogParsed(AbstractBuild<?,?> build,
                              BuildListener listener,
                              ChangeLogSet<?> changelog)
                       throws Exception
Called once the changelog is determined.

During a build, Hudson fetches the update of the workspace from SCM, and determines the changelog (see SCM.checkout(hudson.model.AbstractBuild, hudson.Launcher, hudson.FilePath, hudson.model.BuildListener, Immediately after that, a build will invoke this method on all registered SCMListeners.

If a build failed before we successfully determine changelog, this method will not be invoked (for example, if "cvs update" failed.) OTOH, this method is invoked before the actual build (like ant invocation) happens.

This is an opportunity for SCM-related plugins to act on changelog. A typical usage includes parsing commit messages and do cross-referencing between other systems. Implementations can also contribute Action to AbstractBuild (by build.getActions().add(...) to display additional data on build views.

TODO: once we have cvsnews plugin, refer to its usage.

build - The build in progress, which just finished determining changelog. At this point this build is still in progress. Never null.
listener - BuildListener for on-going build. This can be used to report any errors or the general logging of what's going on. This will show up in the "console output" of the build. Never null.
changelog - Set of changes detected in this build. This is the same value returned from AbstractBuild.getChangeSet() but passed separately for convenience.
Exception - If any exception is thrown from this method, it will be recorded and causes the build to fail.


public final void register()
Registers this SCMListener so that it will start receiving events.


public final boolean unregister()
Unregisters this SCMListener so that it will never receive further events.

Unless SCMListener is unregistered, it will never be a subject of GC.

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