org.springframework.integration.config.annotation.ServiceActivatorAnnotationPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2002-2019 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.integration.config.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.handler.AbstractReplyProducingMessageHandler;
import org.springframework.integration.handler.MessageProcessor;
import org.springframework.integration.handler.ReplyProducingMessageHandlerWrapper;
import org.springframework.integration.handler.ServiceActivatingHandler;
import org.springframework.integration.util.MessagingAnnotationUtils;
import org.springframework.messaging.MessageHandler;
import org.springframework.util.StringUtils;
/**
* Post-processor for Methods annotated with {@link ServiceActivator @ServiceActivator}.
*
* @author Mark Fisher
* @author Gary Russell
* @author Artem Bilan
* @author Yilin Wei
*/
public class ServiceActivatorAnnotationPostProcessor extends AbstractMethodAnnotationPostProcessor {
public ServiceActivatorAnnotationPostProcessor(ConfigurableListableBeanFactory beanFactory) {
super(beanFactory);
this.messageHandlerAttributes.addAll(Arrays.asList("outputChannel", "requiresReply", "adviceChain"));
}
@Override
protected MessageHandler createHandler(Object bean, Method method, List annotations) {
AbstractReplyProducingMessageHandler serviceActivator;
if (AnnotatedElementUtils.isAnnotated(method, Bean.class.getName())) {
final Object target = resolveTargetBeanFromMethodWithBeanAnnotation(method);
serviceActivator = extractTypeIfPossible(target, AbstractReplyProducingMessageHandler.class);
if (serviceActivator == null) {
if (target instanceof MessageHandler) {
/*
* Return a reply-producing message handler so that we still get 'produced no reply' messages
* and the super class will inject the advice chain to advise the handler method if needed.
*/
return new ReplyProducingMessageHandlerWrapper((MessageHandler) target);
}
else {
MessageProcessor messageProcessor = buildLambdaMessageProcessorForBeanMethod(method, target);
if (messageProcessor != null) {
serviceActivator = new ServiceActivatingHandler(messageProcessor);
}
else {
serviceActivator = new ServiceActivatingHandler(target);
}
}
}
else {
checkMessageHandlerAttributes(resolveTargetBeanName(method), annotations);
return (MessageHandler) target;
}
}
else {
serviceActivator = new ServiceActivatingHandler(bean, method);
}
String requiresReply = MessagingAnnotationUtils.resolveAttribute(annotations, "requiresReply", String.class);
if (StringUtils.hasText(requiresReply)) {
serviceActivator.setRequiresReply(resolveAttributeToBoolean(requiresReply));
}
String isAsync = MessagingAnnotationUtils.resolveAttribute(annotations, "async", String.class);
if (StringUtils.hasText(isAsync)) {
serviceActivator.setAsync(resolveAttributeToBoolean(isAsync));
}
setOutputChannelIfPresent(annotations, serviceActivator);
return serviceActivator;
}
}