/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sling.installer.provider.jcr.impl;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.observation.Event;
import javax.jcr.observation.EventIterator;
import javax.jcr.observation.EventListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/** Listen for JCR events under one of our roots, to find out
* when new WatchedFolders must be created, or when some might
* have been deleted.
*/
class RootFolderListener implements EventListener {
protected final Logger log = LoggerFactory.getLogger(this.getClass());
private final RescanTimer timer;
private final String watchedPath;
RootFolderListener(Session session, FolderNameFilter fnf, String path, RescanTimer timer) throws RepositoryException {
this.timer = timer;
this.watchedPath = path;
int eventTypes = Event.NODE_ADDED | Event.NODE_REMOVED;
boolean isDeep = true;
boolean noLocal = true;
session.getWorkspace().getObservationManager().addEventListener(this, eventTypes, watchedPath,
isDeep, null, null, noLocal);
log.info("Watching {} to detect potential changes in subfolders", watchedPath);
}
@Override
public String toString() {
return getClass().getSimpleName() + " (" + watchedPath + ")";
}
void cleanup(Session session) throws RepositoryException {
session.getWorkspace().getObservationManager().removeEventListener(this);
}
/** Schedule a scan */
public void onEvent(EventIterator it) {
while(it.hasNext()) {
final Event e = it.nextEvent();
log.debug("Got event {}", e);
}
timer.scheduleScan();
}
}