https://github.com/sgroschupf/zkclient: A zookeeper client, that makes life a little easier.
  • Stefan Groshupf
  • Peter Voss
  • Johannes Zillmann 
Copyright 2010 the original author or authors.
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.

/**
 * Copyright 2010 the original author or authors.
 *
 * 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.I0Itec.zkclient;


An IZkDataListener can be registered at a ZkClient for listening on zk data changes for a given path. Node: Also this listener re-subscribes it watch for the path on each zk event (zk watches are one-timers) is is not guaranteed that events on the path are missing (see http://zookeeper.wiki.sourceforge.net/ZooKeeperWatches). An implementation of this class should take that into account. 
/**
 * An {@link IZkDataListener} can be registered at a {@link ZkClient} for listening on zk data changes for a given path.
 * 
 * Node: Also this listener re-subscribes it watch for the path on each zk event (zk watches are one-timers) is is not
 * guaranteed that events on the path are missing (see http://zookeeper.wiki.sourceforge.net/ZooKeeperWatches). An
 * implementation of this class should take that into account.
 */
public interface IZkDataListener {

    public void handleDataChange(String dataPath, Object data) throws Exception;

    public void handleDataDeleted(String dataPath) throws Exception;
}