| /* |
| * 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.ConfigItem; |
| import org.apache.dubbo.common.config.configcenter.ConfigurationListener; |
| import org.apache.dubbo.common.config.configcenter.TreePathDynamicConfiguration; |
| import org.apache.dubbo.common.threadpool.support.AbortPolicyWithReport; |
| import org.apache.dubbo.common.utils.CollectionUtils; |
| import org.apache.dubbo.common.utils.NamedThreadFactory; |
| import org.apache.dubbo.remoting.zookeeper.ZookeeperClient; |
| import org.apache.dubbo.remoting.zookeeper.ZookeeperTransporter; |
| |
| import org.apache.zookeeper.data.Stat; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.apache.dubbo.common.constants.LoggerCodeConstants.CONFIG_FAILED_CONNECT_REGISTRY; |
| |
| public class ZookeeperDynamicConfiguration extends TreePathDynamicConfiguration { |
| |
| private Executor executor; |
| private ZookeeperClient zkClient; |
| |
| private CacheListener cacheListener; |
| private static final int DEFAULT_ZK_EXECUTOR_THREADS_NUM = 1; |
| private static final int DEFAULT_QUEUE = 10000; |
| private static final Long THREAD_KEEP_ALIVE_TIME = 0L; |
| |
| ZookeeperDynamicConfiguration(URL url, ZookeeperTransporter zookeeperTransporter) { |
| super(url); |
| |
| this.cacheListener = new CacheListener(); |
| |
| final String threadName = this.getClass().getSimpleName(); |
| this.executor = new ThreadPoolExecutor(DEFAULT_ZK_EXECUTOR_THREADS_NUM, DEFAULT_ZK_EXECUTOR_THREADS_NUM, |
| THREAD_KEEP_ALIVE_TIME, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<>(DEFAULT_QUEUE), |
| new NamedThreadFactory(threadName, true), |
| new AbortPolicyWithReport(threadName, url)); |
| |
| zkClient = zookeeperTransporter.connect(url); |
| boolean isConnected = zkClient.isConnected(); |
| if (!isConnected) { |
| |
| IllegalStateException illegalStateException = |
| new IllegalStateException("Failed to connect with zookeeper, pls check if url " + url + " is correct."); |
| |
| if (logger != null) { |
| logger.error(CONFIG_FAILED_CONNECT_REGISTRY, "configuration server offline", "", |
| "Failed to connect with zookeeper", illegalStateException); |
| } |
| |
| throw illegalStateException; |
| } |
| } |
| |
| /** |
| * @param key e.g., {service}.configurators, {service}.tagrouters, {group}.dubbo.properties |
| * @return |
| */ |
| @Override |
| public String getInternalProperty(String key) { |
| return zkClient.getContent(buildPathKey("", key)); |
| } |
| |
| @Override |
| protected void doClose() throws Exception { |
| // remove data listener |
| Map<String, ZookeeperDataListener> pathKeyListeners = cacheListener.getPathKeyListeners(); |
| for (Map.Entry<String, ZookeeperDataListener> entry : pathKeyListeners.entrySet()) { |
| zkClient.removeDataListener(entry.getKey(), entry.getValue()); |
| } |
| cacheListener.clear(); |
| |
| // zkClient is shared in framework, should not close it here |
| // zkClient.close(); |
| // See: org.apache.dubbo.remoting.zookeeper.AbstractZookeeperTransporter#destroy() |
| // All zk clients is created and destroyed in ZookeeperTransporter. |
| zkClient = null; |
| } |
| |
| @Override |
| protected boolean doPublishConfig(String pathKey, String content) throws Exception { |
| zkClient.create(pathKey, content, false); |
| return true; |
| } |
| |
| @Override |
| public boolean publishConfigCas(String key, String group, String content, Object ticket) { |
| try { |
| if (ticket != null && !(ticket instanceof Stat)) { |
| throw new IllegalArgumentException("zookeeper publishConfigCas requires stat type ticket"); |
| } |
| String pathKey = buildPathKey(group, key); |
| zkClient.createOrUpdate(pathKey, content, false, ticket == null ? 0 : ((Stat) ticket).getVersion()); |
| return true; |
| } catch (Exception e) { |
| logger.warn("zookeeper publishConfigCas failed.", e); |
| return false; |
| } |
| } |
| |
| @Override |
| protected String doGetConfig(String pathKey) throws Exception { |
| return zkClient.getContent(pathKey); |
| } |
| |
| @Override |
| public ConfigItem getConfigItem(String key, String group) { |
| String pathKey = buildPathKey(group, key); |
| return zkClient.getConfigItem(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, String key, String group) { |
| ZookeeperDataListener cachedListener = cacheListener.getCachedListener(pathKey); |
| if (cachedListener != null) { |
| cachedListener.addListener(listener); |
| } else { |
| ZookeeperDataListener addedListener = cacheListener.addListener(pathKey, listener, key, group); |
| zkClient.addDataListener(pathKey, addedListener, executor); |
| } |
| } |
| |
| @Override |
| protected void doRemoveListener(String pathKey, ConfigurationListener listener) { |
| ZookeeperDataListener zookeeperDataListener = cacheListener.removeListener(pathKey, listener); |
| if (zookeeperDataListener != null && CollectionUtils.isEmpty(zookeeperDataListener.getListeners())) { |
| zkClient.removeDataListener(pathKey, zookeeperDataListener); |
| } |
| } |
| } |