| /* |
| * 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.remoting.exchange.support; |
| |
| import org.apache.dubbo.common.utils.CollectionUtils; |
| import org.apache.dubbo.remoting.RemotingException; |
| import org.apache.dubbo.remoting.exchange.ExchangeChannel; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * ReplierDispatcher |
| */ |
| public class ReplierDispatcher implements Replier<Object> { |
| |
| private final Replier<?> defaultReplier; |
| |
| private final Map<Class<?>, Replier<?>> repliers = new ConcurrentHashMap<>(); |
| |
| public ReplierDispatcher() { |
| this(null, null); |
| } |
| |
| public ReplierDispatcher(Replier<?> defaultReplier) { |
| this(defaultReplier, null); |
| } |
| |
| public ReplierDispatcher(Replier<?> defaultReplier, Map<Class<?>, Replier<?>> repliers) { |
| this.defaultReplier = defaultReplier; |
| if (CollectionUtils.isNotEmptyMap(repliers)) { |
| this.repliers.putAll(repliers); |
| } |
| } |
| |
| public <T> ReplierDispatcher addReplier(Class<T> type, Replier<T> replier) { |
| repliers.put(type, replier); |
| return this; |
| } |
| |
| public <T> ReplierDispatcher removeReplier(Class<T> type) { |
| repliers.remove(type); |
| return this; |
| } |
| |
| private Replier<?> getReplier(Class<?> type) { |
| for (Map.Entry<Class<?>, Replier<?>> entry : repliers.entrySet()) { |
| if (entry.getKey().isAssignableFrom(type)) { |
| return entry.getValue(); |
| } |
| } |
| if (defaultReplier != null) { |
| return defaultReplier; |
| } |
| throw new IllegalStateException("Replier not found, Unsupported message object: " + type); |
| } |
| |
| @Override |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public Object reply(ExchangeChannel channel, Object request) throws RemotingException { |
| return ((Replier) getReplier(request.getClass())).reply(channel, request); |
| } |
| } |