/** * Copyright (c) 2015 The JobX Project * <p> * 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 * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * 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 com.jobxhub.registry.zookeeper.zkclient; import org.I0Itec.zkclient.IZkChildListener; import org.I0Itec.zkclient.IZkStateListener; import org.I0Itec.zkclient.ZkClient; import org.I0Itec.zkclient.exception.ZkNoNodeException; import org.I0Itec.zkclient.exception.ZkNodeExistsException; import org.apache.zookeeper.Watcher.Event.KeeperState; import com.jobxhub.common.Constants; import com.jobxhub.registry.zookeeper.ChildListener; import com.jobxhub.registry.zookeeper.StateListener; import com.jobxhub.registry.zookeeper.support.AbstractZookeeperClient; import com.jobxhub.registry.URL; import java.util.List; public class ZkclientZookeeperClient extends AbstractZookeeperClient<IZkChildListener> { private final ZkClient client; private volatile KeeperState state = KeeperState.SyncConnected; public ZkclientZookeeperClient(URL url) { super(url); client = new ZkClient(url.getBackupAddress(), Constants.ZK_CONNECTION_TIMEOUT); client.subscribeStateChanges(new IZkStateListener() { public void handleStateChanged(KeeperState state) throws Exception { ZkclientZookeeperClient.this.state = state; if (state == KeeperState.Disconnected) { stateChanged(StateListener.DISCONNECTED); } else if (state == KeeperState.SyncConnected) { stateChanged(StateListener.CONNECTED); } } public void handleNewSession() throws Exception { stateChanged(StateListener.RECONNECTED); } @Override public void handleSessionEstablishmentError(Throwable throwable) throws Exception { } }); } public void createPersistent(String path) { try { client.createPersistent(path, true); } catch (ZkNodeExistsException e) { } } public void createEphemeral(String path) { try { client.createEphemeral(path); } catch (ZkNodeExistsException e) { } } public void delete(String path) { try { client.delete(path); } catch (ZkNoNodeException e) { } } public List<String> getChildren(String path) { try { return client.getChildren(path); } catch (ZkNoNodeException e) { return null; } } public boolean isConnected() { return state == KeeperState.SyncConnected; } public void doClose() { client.close(); } public IZkChildListener createTargetChildListener(String path, final ChildListener listener) { return new IZkChildListener() { public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception { listener.childChanged(parentPath, currentChilds); } }; } public List<String> addTargetChildListener(String path, final IZkChildListener listener) { return client.subscribeChildChanges(path, listener); } public void removeTargetChildListener(String path, IZkChildListener listener) { client.unsubscribeChildChanges(path, listener); } }