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;

import org.apache.zookeeper.Watcher.Event.KeeperState;

public interface IZkStateListener {

    
Called when the zookeeper connection state has changed.

Params:
  • state – 
           The new state.
Throws:
/**
     * Called when the zookeeper connection state has changed.
     * 
     * @param state
     *            The new state.
     * @throws Exception
     *             On any error.
     */
    public void handleStateChanged(KeeperState state) throws Exception;

    
Called after the zookeeper session has expired and a new session has been created. You would have to re-create
any ephemeral nodes here.

Throws:
  • Exception – 
            On any error.
/**
     * Called after the zookeeper session has expired and a new session has been created. You would have to re-create
     * any ephemeral nodes here.
     * 
     * @throws Exception
     *             On any error.
     */
    public void handleNewSession() throws Exception;

    
Called when a session cannot be re-established. This should be used to implement connection
failure handling e.g. retry to connect or pass the error up

Params:
  • error – 
           The error that prevents a session from being established
Throws:
/**
     * Called when a session cannot be re-established. This should be used to implement connection
     * failure handling e.g. retry to connect or pass the error up
     * 
     * @param error
     *            The error that prevents a session from being established
     * @throws Exception
     *             On any error.
     */
    public void handleSessionEstablishmentError(final Throwable error) throws Exception;

}