info.magnolia.cms.util
Class ObservationUtil

java.lang.Object
  info.magnolia.cms.util.ObservationUtil

public class ObservationUtil
extends java.lang.Object

Util to register JCR observations. Supports delayed execution of the listener to handle event bursts.

Version:

$Revision: 41137 $ ($Author: gjoseph $)

Nested Class Summary

static class	ObservationUtil.DeferringEventListener A listener using an ObservationUtil.ObservationBasedDelayedExecutor.
static class	ObservationUtil.ListBasedEventIterator List based event iterator.
static class	ObservationUtil.ObservationBasedDelayedExecutor Deferred event handling.

Constructor Summary

ObservationUtil()

Method Summary

static javax.jcr.observation.EventListener	instanciateDeferredEventListener(javax.jcr.observation.EventListener listener, long delay, long maxDelay) Use this and register the returned EventListener with the registerChangeListener() methods, if you need to be able to later unregister your EventListener.
static void	registerChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, javax.jcr.observation.EventListener listener) Registers an EventListener for any node type.
static void	registerChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, java.lang.String[] nodeTypes, javax.jcr.observation.EventListener listener) Registers an EventListener for a specific set of node types and event types.
static void	registerChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, java.lang.String[] nodeTypes, int eventTypesMask, javax.jcr.observation.EventListener listener) Register a single event listener, bound to the given path.
static void	registerChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, java.lang.String nodeType, javax.jcr.observation.EventListener listener) Registers an EventListener for a specific node type.
static void	registerChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, java.lang.String nodeType, int eventTypesMask, javax.jcr.observation.EventListener listener) Registers an EventListener for a specific node type and event types.
static void	registerChangeListener(java.lang.String repository, java.lang.String observationPath, javax.jcr.observation.EventListener listener) Registers an EventListener for any node type.
static void	registerDeferredChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, javax.jcr.observation.EventListener listener, long delay, long maxDelay)
static void	registerDeferredChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, java.lang.String[] nodeTypes, javax.jcr.observation.EventListener listener, long delay, long maxDelay) The event firing is deferred in case there is a serie of fired events.
static void	registerDeferredChangeListener(java.lang.String repository, java.lang.String observationPath, boolean includeSubnodes, java.lang.String nodeType, javax.jcr.observation.EventListener listener, long delay, long maxDelay)
static void	registerDeferredChangeListener(java.lang.String repository, java.lang.String observationPath, javax.jcr.observation.EventListener listener, long delay, long maxDelay)
static void	unregisterChangeListener(java.lang.String repository, javax.jcr.observation.EventListener listener)

Methods inherited from class java.lang.Object

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

Constructor Detail

ObservationUtil

public ObservationUtil()

Method Detail

registerChangeListener

public static void registerChangeListener(java.lang.String repository,
                                          java.lang.String observationPath,
                                          javax.jcr.observation.EventListener listener)

Registers an EventListener for any node type.

See Also:

registerChangeListener(String,String,boolean,String[],javax.jcr.observation.EventListener)

registerChangeListener

public static void registerChangeListener(java.lang.String repository,
                                          java.lang.String observationPath,
                                          boolean includeSubnodes,
                                          javax.jcr.observation.EventListener listener)

Registers an EventListener for any node type.

See Also:

registerChangeListener(String,String,boolean,String[],javax.jcr.observation.EventListener)

registerChangeListener

public static void registerChangeListener(java.lang.String repository,
                                          java.lang.String observationPath,
                                          boolean includeSubnodes,
                                          java.lang.String nodeType,
                                          javax.jcr.observation.EventListener listener)

Registers an EventListener for a specific node type.

See Also:

registerChangeListener(String,String,boolean,String[],javax.jcr.observation.EventListener)

registerChangeListener

public static void registerChangeListener(java.lang.String repository,
                                          java.lang.String observationPath,
                                          boolean includeSubnodes,
                                          java.lang.String nodeType,
                                          int eventTypesMask,
                                          javax.jcr.observation.EventListener listener)

Registers an EventListener for a specific node type and event types.

See Also:

registerChangeListener(String,String,boolean,String[],int,javax.jcr.observation.EventListener)

registerChangeListener

public static void registerChangeListener(java.lang.String repository,
                                          java.lang.String observationPath,
                                          boolean includeSubnodes,
                                          java.lang.String[] nodeTypes,
                                          javax.jcr.observation.EventListener listener)

Registers an EventListener for a specific set of node types and event types.

See Also:

registerChangeListener(String, String, boolean, String[], int, javax.jcr.observation.EventListener)

registerChangeListener

public static void registerChangeListener(java.lang.String repository,
                                          java.lang.String observationPath,
                                          boolean includeSubnodes,
                                          java.lang.String[] nodeTypes,
                                          int eventTypesMask,
                                          javax.jcr.observation.EventListener listener)

Register a single event listener, bound to the given path. Be careful that if you observe "/", events are going to be generated for jcr:system, which is "shared" across all workspaces.

Parameters:

repository -

observationPath - repository path

includeSubnodes - the isDeep parameter of ObservationManager.addEventListener()

nodeTypes - the node types to filter events for

eventTypesMask - an ORed mask of even types (Event constants)

listener - event listener

See Also:

ObservationManager.addEventListener(javax.jcr.observation.EventListener, int, java.lang.String, boolean, java.lang.String[], java.lang.String[], boolean), Event

registerDeferredChangeListener

public static void registerDeferredChangeListener(java.lang.String repository,
                                                  java.lang.String observationPath,
                                                  javax.jcr.observation.EventListener listener,
                                                  long delay,
                                                  long maxDelay)

registerDeferredChangeListener

public static void registerDeferredChangeListener(java.lang.String repository,
                                                  java.lang.String observationPath,
                                                  boolean includeSubnodes,
                                                  javax.jcr.observation.EventListener listener,
                                                  long delay,
                                                  long maxDelay)

registerDeferredChangeListener

public static void registerDeferredChangeListener(java.lang.String repository,
                                                  java.lang.String observationPath,
                                                  boolean includeSubnodes,
                                                  java.lang.String nodeType,
                                                  javax.jcr.observation.EventListener listener,
                                                  long delay,
                                                  long maxDelay)

registerDeferredChangeListener

public static void registerDeferredChangeListener(java.lang.String repository,
                                                  java.lang.String observationPath,
                                                  boolean includeSubnodes,
                                                  java.lang.String[] nodeTypes,
                                                  javax.jcr.observation.EventListener listener,
                                                  long delay,
                                                  long maxDelay)

The event firing is deferred in case there is a serie of fired events.

instanciateDeferredEventListener

public static javax.jcr.observation.EventListener instanciateDeferredEventListener(javax.jcr.observation.EventListener listener,
                                                                                   long delay,
                                                                                   long maxDelay)

Use this and register the returned EventListener with the registerChangeListener() methods, if you need to be able to later unregister your EventListener.

unregisterChangeListener

public static void unregisterChangeListener(java.lang.String repository,
                                            javax.jcr.observation.EventListener listener)