| /* |
| * 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.registry.integration; |
| |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.URLBuilder; |
| import org.apache.dubbo.registry.Registry; |
| import org.apache.dubbo.registry.client.RegistryProtocol; |
| import org.apache.dubbo.rpc.Invocation; |
| import org.apache.dubbo.rpc.Invoker; |
| import org.apache.dubbo.rpc.Result; |
| import org.apache.dubbo.rpc.RpcException; |
| import org.apache.dubbo.rpc.cluster.Cluster; |
| import org.apache.dubbo.rpc.cluster.ClusterInvoker; |
| import org.apache.dubbo.rpc.cluster.Directory; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import static org.apache.dubbo.common.constants.RegistryConstants.ENABLE_REGISTRY_DIRECTORY_AUTO_MIGRATION; |
| import static org.apache.dubbo.common.constants.RegistryConstants.REGISTRY_KEY; |
| import static org.apache.dubbo.common.constants.RegistryConstants.REGISTRY_PROTOCOL; |
| import static org.apache.dubbo.registry.Constants.CONSUMER_PROTOCOL; |
| import static org.apache.dubbo.registry.Constants.DEFAULT_REGISTRY; |
| import static org.apache.dubbo.registry.Constants.REGISTER_IP_KEY; |
| |
| /** |
| * RegistryProtocol |
| */ |
| public class InterfaceCompatibleRegistryProtocol extends RegistryProtocol { |
| |
| @Override |
| protected URL getRegistryUrl(Invoker<?> originInvoker) { |
| URL registryUrl = originInvoker.getUrl(); |
| if (REGISTRY_PROTOCOL.equals(registryUrl.getProtocol())) { |
| String protocol = registryUrl.getParameter(REGISTRY_KEY, DEFAULT_REGISTRY); |
| registryUrl = registryUrl.setProtocol(protocol).removeParameter(REGISTRY_KEY); |
| } |
| return registryUrl; |
| } |
| |
| @Override |
| protected URL getRegistryUrl(URL url) { |
| return URLBuilder.from(url) |
| .setProtocol(url.getParameter(REGISTRY_KEY, DEFAULT_REGISTRY)) |
| .removeParameter(REGISTRY_KEY) |
| .build(); |
| } |
| |
| @Override |
| protected <T> DynamicDirectory<T> createDirectory(Class<T> type, URL url) { |
| return new RegistryDirectory<>(type, url); |
| } |
| |
| protected <T> Invoker<T> doRefer(Cluster cluster, Registry registry, Class<T> type, URL url) { |
| ClusterInvoker<T> invoker = getInvoker(cluster, registry, type, url); |
| ClusterInvoker<T> serviceDiscoveryInvoker = getServiceDiscoveryInvoker(cluster, type, url); |
| ClusterInvoker<T> migrationInvoker = new MigrationInvoker<>(invoker, serviceDiscoveryInvoker); |
| |
| return interceptInvoker(migrationInvoker, url); |
| } |
| |
| protected <T> ClusterInvoker<T> getServiceDiscoveryInvoker(Cluster cluster, Class<T> type, URL url) { |
| Registry registry = registryFactory.getRegistry(super.getRegistryUrl(url)); |
| ClusterInvoker<T> serviceDiscoveryInvoker = null; |
| // enable auto migration from interface address pool to instance address pool |
| boolean autoMigration = url.getParameter(ENABLE_REGISTRY_DIRECTORY_AUTO_MIGRATION, false); |
| if (autoMigration) { |
| DynamicDirectory<T> serviceDiscoveryDirectory = super.createDirectory(type, url); |
| serviceDiscoveryDirectory.setRegistry(registry); |
| serviceDiscoveryDirectory.setProtocol(protocol); |
| Map<String, String> parameters = new HashMap<String, String>(serviceDiscoveryDirectory.getConsumerUrl().getParameters()); |
| URL urlToRegistry = new URL(CONSUMER_PROTOCOL, parameters.remove(REGISTER_IP_KEY), 0, type.getName(), parameters); |
| if (serviceDiscoveryDirectory.isShouldRegister()) { |
| serviceDiscoveryDirectory.setRegisteredConsumerUrl(urlToRegistry); |
| registry.register(serviceDiscoveryDirectory.getRegisteredConsumerUrl()); |
| } |
| serviceDiscoveryDirectory.buildRouterChain(urlToRegistry); |
| serviceDiscoveryDirectory.subscribe(toSubscribeUrl(urlToRegistry)); |
| serviceDiscoveryInvoker = (ClusterInvoker<T>) cluster.join(serviceDiscoveryDirectory); |
| } |
| return serviceDiscoveryInvoker; |
| } |
| |
| private static class MigrationInvoker<T> implements ClusterInvoker<T> { |
| private ClusterInvoker<T> invoker; |
| private ClusterInvoker<T> serviceDiscoveryInvoker; |
| |
| public MigrationInvoker(ClusterInvoker<T> invoker, ClusterInvoker<T> serviceDiscoveryInvoker) { |
| this.invoker = invoker; |
| this.serviceDiscoveryInvoker = serviceDiscoveryInvoker; |
| } |
| |
| public ClusterInvoker<T> getInvoker() { |
| return invoker; |
| } |
| |
| public void setInvoker(ClusterInvoker<T> invoker) { |
| this.invoker = invoker; |
| } |
| |
| public ClusterInvoker<T> getServiceDiscoveryInvoker() { |
| return serviceDiscoveryInvoker; |
| } |
| |
| public void setServiceDiscoveryInvoker(ClusterInvoker<T> serviceDiscoveryInvoker) { |
| this.serviceDiscoveryInvoker = serviceDiscoveryInvoker; |
| } |
| |
| @Override |
| public Class<T> getInterface() { |
| return invoker.getInterface(); |
| } |
| |
| @Override |
| public Result invoke(Invocation invocation) throws RpcException { |
| if (serviceDiscoveryInvoker == null) { |
| return invoker.invoke(invocation); |
| } |
| |
| if (invoker.isDestroyed()) { |
| return serviceDiscoveryInvoker.invoke(invocation); |
| } |
| if (serviceDiscoveryInvoker.isAvailable()) { |
| invoker.destroy(); // can be destroyed asynchronously |
| return serviceDiscoveryInvoker.invoke(invocation); |
| } |
| return invoker.invoke(invocation); |
| } |
| |
| @Override |
| public URL getUrl() { |
| return invoker.getUrl(); |
| } |
| |
| @Override |
| public boolean isAvailable() { |
| if (serviceDiscoveryInvoker == null) { |
| return invoker.isAvailable(); |
| } |
| return invoker.isAvailable() || serviceDiscoveryInvoker.isAvailable(); |
| } |
| |
| @Override |
| public void destroy() { |
| if (invoker != null) { |
| invoker.destroy(); |
| } |
| if (serviceDiscoveryInvoker != null) { |
| serviceDiscoveryInvoker.destroy(); |
| } |
| } |
| |
| @Override |
| public URL getRegistryUrl() { |
| return invoker.getRegistryUrl(); |
| } |
| |
| @Override |
| public Directory<T> getDirectory() { |
| return invoker.getDirectory(); |
| } |
| |
| @Override |
| public boolean isDestroyed() { |
| if (serviceDiscoveryInvoker == null) { |
| return invoker.isDestroyed(); |
| } |
| return invoker.isDestroyed() && serviceDiscoveryInvoker.isDestroyed(); |
| } |
| } |
| |
| } |