| /* |
| * 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.admin.registry.metadata.impl; |
| |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.retry.ExponentialBackoffRetry; |
| import org.apache.dubbo.admin.common.util.Constants; |
| import org.apache.dubbo.admin.registry.metadata.MetaDataCollector; |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.logger.Logger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| import org.apache.dubbo.metadata.identifier.MetadataIdentifier; |
| |
| public class ZookeeperMetaDataCollector implements MetaDataCollector { |
| |
| private static final Logger logger = LoggerFactory.getLogger(ZookeeperMetaDataCollector.class); |
| private CuratorFramework client; |
| private URL url; |
| private String root; |
| private final static String METADATA_NODE_NAME = "service.data"; |
| private final static String DEFAULT_ROOT = "dubbo"; |
| |
| @Override |
| public void setUrl(URL url) { |
| this.url = url; |
| } |
| |
| @Override |
| public URL getUrl() { |
| return url; |
| } |
| |
| @Override |
| public void init() { |
| String group = url.getParameter(Constants.GROUP_KEY, DEFAULT_ROOT); |
| if (!group.startsWith(Constants.PATH_SEPARATOR)) { |
| group = Constants.PATH_SEPARATOR + group; |
| } |
| root = group; |
| client = CuratorFrameworkFactory.newClient(url.getAddress(), new ExponentialBackoffRetry(1000, 3)); |
| client.start(); |
| } |
| |
| |
| @Override |
| public String getProviderMetaData(MetadataIdentifier key) { |
| return doGetMetadata(key); |
| } |
| |
| @Override |
| public String getConsumerMetaData(MetadataIdentifier key) { |
| return doGetMetadata(key); |
| } |
| |
| private String getNodePath(MetadataIdentifier metadataIdentifier) { |
| return toRootDir() + metadataIdentifier.getUniqueKey(MetadataIdentifier.KeyTypeEnum.PATH) + |
| Constants.PATH_SEPARATOR + METADATA_NODE_NAME; |
| } |
| |
| private String toRootDir() { |
| if (root.equals(Constants.PATH_SEPARATOR)) { |
| return root; |
| } |
| return root + Constants.PATH_SEPARATOR; |
| } |
| |
| private String doGetMetadata(MetadataIdentifier identifier) { |
| //TODO error handing |
| try { |
| String path = getNodePath(identifier); |
| if (client.checkExists().forPath(path) == null) { |
| return null; |
| } |
| return new String(client.getData().forPath(path)); |
| } catch (Exception e) { |
| logger.error(e.getMessage(), e); |
| } |
| return null; |
| } |
| } |