zookeeper-api/src/main/java/org/apache/helix/zookeeper/zkclient/deprecated/IZkStateListener.java

/**
 * 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.apache.helix.zookeeper.zkclient.deprecated;

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

@Deprecated
public interface IZkStateListener {

    /**
     * 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.
     */
    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
     *
     * @param error
     *            The error that prevents a session from being established
     * @throws Exception
     *             On any error.
     */
    public void handleSessionEstablishmentError(final Throwable error) throws Exception;

}