Move to the root the bundles which will be part of v1.4 and v2.2

[lgpl/argeo-commons.git] / org.argeo.server.jcr / src / main / java / org / argeo / jcr / DefaultJcrListener.java

diff --git a/org.argeo.server.jcr/src/main/java/org/argeo/jcr/DefaultJcrListener.java b/org.argeo.server.jcr/src/main/java/org/argeo/jcr/DefaultJcrListener.java
new file mode 100644 (file)
index 0000000..253b305
--- /dev/null
+++ b/org.argeo.server.jcr/src/main/java/org/argeo/jcr/DefaultJcrListener.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.jcr;
+
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.observation.Event;
+import javax.jcr.observation.EventIterator;
+import javax.jcr.observation.EventListener;
+import javax.jcr.observation.ObservationManager;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.ArgeoException;
+
+/** To be overridden */
+public class DefaultJcrListener implements EventListener {
+       private final static Log log = LogFactory.getLog(DefaultJcrListener.class);
+       private Session session;
+       private String path = "/";
+       private Boolean deep = true;
+
+       public void start() {
+               try {
+                       addEventListener(session().getWorkspace().getObservationManager());
+                       if (log.isDebugEnabled())
+                               log.debug("Registered JCR event listener on " + path);
+               } catch (Exception e) {
+                       throw new ArgeoException("Cannot register event listener", e);
+               }
+       }
+
+       public void stop() {
+               try {
+                       session().getWorkspace().getObservationManager()
+                                       .removeEventListener(this);
+                       if (log.isDebugEnabled())
+                               log.debug("Unregistered JCR event listener on " + path);
+               } catch (Exception e) {
+                       throw new ArgeoException("Cannot unregister event listener", e);
+               }
+       }
+
+       /** Default is listen to all events */
+       protected Integer getEvents() {
+               return Event.NODE_ADDED | Event.NODE_REMOVED | Event.PROPERTY_ADDED
+                               | Event.PROPERTY_CHANGED | Event.PROPERTY_REMOVED;
+       }
+
+       /** To be overidden */
+       public void onEvent(EventIterator events) {
+               while (events.hasNext()) {
+                       Event event = events.nextEvent();
+                       log.debug(event);
+               }
+       }
+
+       /** To be overidden */
+       protected void addEventListener(ObservationManager observationManager)
+                       throws RepositoryException {
+               observationManager.addEventListener(this, getEvents(), path, deep,
+                               null, null, false);
+       }
+
+       private Session session() {
+               return session;
+       }
+
+       public void setPath(String path) {
+               this.path = path;
+       }
+
+       public void setDeep(Boolean deep) {
+               this.deep = deep;
+       }
+
+       public void setSession(Session session) {
+               this.session = session;
+       }
+
+}