| /* |
| * 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.metadata.store.zookeeper; |
| |
| import com.google.gson.Gson; |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.logger.Logger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| import org.apache.dubbo.common.utils.CollectionUtils; |
| import org.apache.dubbo.common.utils.StringUtils; |
| import org.apache.dubbo.metadata.MappingChangedEvent; |
| import org.apache.dubbo.metadata.MappingListener; |
| import org.apache.dubbo.metadata.MetadataInfo; |
| import org.apache.dubbo.metadata.report.identifier.BaseMetadataIdentifier; |
| import org.apache.dubbo.metadata.report.identifier.KeyTypeEnum; |
| import org.apache.dubbo.metadata.report.identifier.MetadataIdentifier; |
| import org.apache.dubbo.metadata.report.identifier.ServiceMetadataIdentifier; |
| import org.apache.dubbo.metadata.report.identifier.SubscriberMetadataIdentifier; |
| import org.apache.dubbo.metadata.report.support.AbstractMetadataReport; |
| import org.apache.dubbo.remoting.zookeeper.ChildListener; |
| import org.apache.dubbo.remoting.zookeeper.ZookeeperClient; |
| import org.apache.dubbo.remoting.zookeeper.ZookeeperTransporter; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import static org.apache.dubbo.common.constants.CommonConstants.GROUP_KEY; |
| import static org.apache.dubbo.common.constants.CommonConstants.PATH_SEPARATOR; |
| |
| /** |
| * ZookeeperMetadataReport |
| */ |
| public class ZookeeperMetadataReport extends AbstractMetadataReport { |
| |
| private final static Logger logger = LoggerFactory.getLogger(ZookeeperMetadataReport.class); |
| |
| private final String root; |
| |
| final ZookeeperClient zkClient; |
| |
| private Gson gson = new Gson(); |
| |
| private Map<String, ChildListener> listenerMap = new ConcurrentHashMap<>(); |
| |
| public ZookeeperMetadataReport(URL url, ZookeeperTransporter zookeeperTransporter) { |
| super(url); |
| if (url.isAnyHost()) { |
| throw new IllegalStateException("registry address == null"); |
| } |
| String group = url.getParameter(GROUP_KEY, DEFAULT_ROOT); |
| if (!group.startsWith(PATH_SEPARATOR)) { |
| group = PATH_SEPARATOR + group; |
| } |
| this.root = group; |
| zkClient = zookeeperTransporter.connect(url); |
| } |
| |
| String toRootDir() { |
| if (root.equals(PATH_SEPARATOR)) { |
| return root; |
| } |
| return root + PATH_SEPARATOR; |
| } |
| |
| @Override |
| protected void doStoreProviderMetadata(MetadataIdentifier providerMetadataIdentifier, String serviceDefinitions) { |
| storeMetadata(providerMetadataIdentifier, serviceDefinitions); |
| } |
| |
| @Override |
| protected void doStoreConsumerMetadata(MetadataIdentifier consumerMetadataIdentifier, String value) { |
| storeMetadata(consumerMetadataIdentifier, value); |
| } |
| |
| @Override |
| protected void doSaveMetadata(ServiceMetadataIdentifier metadataIdentifier, URL url) { |
| zkClient.create(getNodePath(metadataIdentifier), URL.encode(url.toFullString()), false); |
| } |
| |
| @Override |
| protected void doRemoveMetadata(ServiceMetadataIdentifier metadataIdentifier) { |
| zkClient.delete(getNodePath(metadataIdentifier)); |
| } |
| |
| @Override |
| protected List<String> doGetExportedURLs(ServiceMetadataIdentifier metadataIdentifier) { |
| String content = zkClient.getContent(getNodePath(metadataIdentifier)); |
| if (StringUtils.isEmpty(content)) { |
| return Collections.emptyList(); |
| } |
| return new ArrayList<String>(Arrays.asList(URL.decode(content))); |
| } |
| |
| @Override |
| protected void doSaveSubscriberData(SubscriberMetadataIdentifier subscriberMetadataIdentifier, String urls) { |
| zkClient.create(getNodePath(subscriberMetadataIdentifier), urls, false); |
| } |
| |
| @Override |
| protected String doGetSubscribedURLs(SubscriberMetadataIdentifier subscriberMetadataIdentifier) { |
| return zkClient.getContent(getNodePath(subscriberMetadataIdentifier)); |
| } |
| |
| @Override |
| public String getServiceDefinition(MetadataIdentifier metadataIdentifier) { |
| return zkClient.getContent(getNodePath(metadataIdentifier)); |
| } |
| |
| private void storeMetadata(MetadataIdentifier metadataIdentifier, String v) { |
| zkClient.create(getNodePath(metadataIdentifier), v, false); |
| } |
| |
| String getNodePath(BaseMetadataIdentifier metadataIdentifier) { |
| return toRootDir() + metadataIdentifier.getUniqueKey(KeyTypeEnum.PATH); |
| } |
| |
| @Override |
| public void publishAppMetadata(SubscriberMetadataIdentifier identifier, MetadataInfo metadataInfo) { |
| String path = getNodePath(identifier); |
| if (StringUtils.isBlank(zkClient.getContent(path))) { |
| zkClient.create(path, gson.toJson(metadataInfo), false); |
| } |
| } |
| |
| @Override |
| public void registerServiceAppMapping(String serviceKey, String application, URL url) { |
| String path = toRootDir() + serviceKey + PATH_SEPARATOR + application; |
| if (StringUtils.isBlank(zkClient.getContent(path))) { |
| Map<String, String> value = new HashMap<>(); |
| value.put("timestamp", String.valueOf(System.currentTimeMillis())); |
| zkClient.create(path, gson.toJson(value), false); |
| } |
| } |
| |
| @Override |
| public MetadataInfo getAppMetadata(SubscriberMetadataIdentifier identifier, Map<String, String> instanceMetadata) { |
| String content = zkClient.getContent(getNodePath(identifier)); |
| return gson.fromJson(content, MetadataInfo.class); |
| } |
| |
| @Override |
| public Set<String> getServiceAppMapping(String serviceKey, MappingListener listener, URL url) { |
| Set<String> appNameSet = new HashSet<>(); |
| String path = toRootDir() + serviceKey; |
| List<String> appNameList = zkClient.getChildren(path); |
| if (!CollectionUtils.isEmpty(appNameList)) { |
| appNameSet.addAll(appNameList); |
| } |
| |
| if (null == listenerMap.get(path)) { |
| zkClient.create(path, false); |
| addServiceMappingListener(path, serviceKey, listener); |
| } |
| |
| return appNameSet; |
| } |
| |
| private void addServiceMappingListener(String path, String serviceKey, MappingListener listener) { |
| ChildListener zkListener = new ChildListener() { |
| @Override |
| public void childChanged(String path, List<String> children) { |
| MappingChangedEvent event = new MappingChangedEvent(); |
| event.setServiceKey(serviceKey); |
| event.setApps(null != children ? new HashSet<>(children) : null); |
| listener.onEvent(event); |
| } |
| }; |
| zkClient.addChildListener(path, zkListener); |
| listenerMap.put(path, zkListener); |
| } |
| } |