Java tutorial
/* * Copyright 2015-2019 the original author or authors. * * Licensed 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 * * https://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.springframework.amqp.rabbit.listener; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; import org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler; import org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter; import org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter; import org.springframework.lang.Nullable; import org.springframework.messaging.handler.invocation.InvocableHandlerMethod; /** * @author Gary Russell * @since 1.5 * */ public class MultiMethodRabbitListenerEndpoint extends MethodRabbitListenerEndpoint { private final List<Method> methods; private final Method defaultMethod; /** * Construct an instance for the provided methods and bean. * @param methods the methods. * @param bean the bean. */ public MultiMethodRabbitListenerEndpoint(List<Method> methods, Object bean) { this(methods, null, bean); } /** * Construct an instance for the provided methods, default method and bean. * @param methods the methods. * @param defaultMethod the default method. * @param bean the bean. * @since 2.0.3 */ public MultiMethodRabbitListenerEndpoint(List<Method> methods, @Nullable Method defaultMethod, Object bean) { this.methods = methods; this.defaultMethod = defaultMethod; setBean(bean); } @Override protected HandlerAdapter configureListenerAdapter(MessagingMessageListenerAdapter messageListener) { List<InvocableHandlerMethod> invocableHandlerMethods = new ArrayList<InvocableHandlerMethod>(); InvocableHandlerMethod defaultHandler = null; for (Method method : this.methods) { InvocableHandlerMethod handler = getMessageHandlerMethodFactory() .createInvocableHandlerMethod(getBean(), method); invocableHandlerMethods.add(handler); if (method.equals(this.defaultMethod)) { defaultHandler = handler; } } return new HandlerAdapter(new DelegatingInvocableHandler(invocableHandlerMethods, defaultHandler, getBean(), getResolver(), getBeanExpressionContext())); } }