org.springframework.integration.handler.BeanNameMessageProcessor Maven / Gradle / Ivy
/*
* Copyright 2016-2019 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.handler;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.lang.Nullable;
import org.springframework.messaging.Message;
/**
* An "artificial" {@link MessageProcessor} for lazy-load of target bean by its name.
* For internal use only.
*
* @param the expected {@link #processMessage} result type.
*
* @author Artem Bilan
*
* @since 5.0
*/
public class BeanNameMessageProcessor implements MessageProcessor, BeanFactoryAware {
private final String beanName;
private final String methodName;
private MessageProcessor delegate;
private BeanFactory beanFactory;
public BeanNameMessageProcessor(String object, String methodName) {
this.beanName = object;
this.methodName = methodName;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
@Override
@Nullable
public T processMessage(Message message) {
if (this.delegate == null) {
Object target = this.beanFactory.getBean(this.beanName);
MethodInvokingMessageProcessor methodInvokingMessageProcessor =
new MethodInvokingMessageProcessor<>(target, this.methodName);
methodInvokingMessageProcessor.setBeanFactory(this.beanFactory);
this.delegate = methodInvokingMessageProcessor;
}
return this.delegate.processMessage(message);
}
}