| /* |
| * 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.dubbo.configcenter.support.zookeeper; |
| |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.config.configcenter.ConfigurationListener; |
| import org.apache.dubbo.common.config.configcenter.TreePathDynamicConfiguration; |
| import org.apache.dubbo.common.utils.NamedThreadFactory; |
| import org.apache.dubbo.remoting.zookeeper.ZookeeperClient; |
| import org.apache.dubbo.remoting.zookeeper.ZookeeperTransporter; |
| |
| import java.util.Collection; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * |
| */ |
| public class ZookeeperDynamicConfiguration extends TreePathDynamicConfiguration { |
| |
| private Executor executor; |
| // The final root path would be: /configRootPath/"config" |
| private String rootPath; |
| private final ZookeeperClient zkClient; |
| private CountDownLatch initializedLatch; |
| |
| private CacheListener cacheListener; |
| private URL url; |
| |
| |
| ZookeeperDynamicConfiguration(URL url, ZookeeperTransporter zookeeperTransporter) { |
| super(url); |
| this.url = url; |
| rootPath = getRootPath(url); |
| |
| initializedLatch = new CountDownLatch(1); |
| this.cacheListener = new CacheListener(rootPath, initializedLatch); |
| this.executor = Executors.newFixedThreadPool(1, new NamedThreadFactory(this.getClass().getSimpleName(), true)); |
| |
| zkClient = zookeeperTransporter.connect(url); |
| zkClient.addDataListener(rootPath, cacheListener, executor); |
| try { |
| // Wait for connection |
| long timeout = url.getParameter("init.timeout", 5000); |
| boolean isCountDown = this.initializedLatch.await(timeout, TimeUnit.MILLISECONDS); |
| if (!isCountDown) { |
| throw new IllegalStateException("Failed to receive INITIALIZED event from zookeeper, pls. check if url " |
| + url + " is correct"); |
| } |
| } catch (InterruptedException e) { |
| logger.warn("Failed to build local cache for config center (zookeeper)." + url); |
| } |
| } |
| |
| /** |
| * @param key e.g., {service}.configurators, {service}.tagrouters, {group}.dubbo.properties |
| * @return |
| */ |
| @Override |
| public String getInternalProperty(String key) { |
| return zkClient.getContent(key); |
| } |
| |
| @Override |
| protected void doClose() throws Exception { |
| zkClient.close(); |
| } |
| |
| @Override |
| protected boolean doPublishConfig(String pathKey, String content) throws Exception { |
| zkClient.create(pathKey, content, false); |
| return true; |
| } |
| |
| @Override |
| protected String doGetConfig(String pathKey) throws Exception { |
| return zkClient.getContent(pathKey); |
| } |
| |
| @Override |
| protected boolean doRemoveConfig(String pathKey) throws Exception { |
| zkClient.delete(pathKey); |
| return true; |
| } |
| |
| @Override |
| protected Collection<String> doGetConfigKeys(String groupPath) { |
| return zkClient.getChildren(groupPath); |
| } |
| |
| @Override |
| protected void doAddListener(String pathKey, ConfigurationListener listener) { |
| cacheListener.addListener(pathKey, listener); |
| } |
| |
| @Override |
| protected void doRemoveListener(String pathKey, ConfigurationListener listener) { |
| cacheListener.removeListener(pathKey, listener); |
| } |
| } |