/*
* Copyright 2002-2017 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
*
* 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.springframework.integration.aggregator;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Map;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.Lifecycle;
import org.springframework.integration.util.AbstractExpressionEvaluator;
import org.springframework.integration.util.MessagingMethodInvokerHelper;
import org.springframework.messaging.Message;
/**
* A MessageListProcessor implementation that invokes a method on a target POJO.
*
* @author Dave Syer
* @author Artem Bilan
* @since 2.0
*/
public class MethodInvokingMessageListProcessor<T> extends AbstractExpressionEvaluator
implements Lifecycle {
private final MessagingMethodInvokerHelper<T> delegate;
public MethodInvokingMessageListProcessor(Object targetObject, Method method, Class<T> expectedType) {
this.delegate = new MessagingMethodInvokerHelper<T>(targetObject, method, expectedType, true);
}
public MethodInvokingMessageListProcessor(Object targetObject, Method method) {
this.delegate = new MessagingMethodInvokerHelper<T>(targetObject, method, true);
}
public MethodInvokingMessageListProcessor(Object targetObject, String methodName, Class<T> expectedType) {
this.delegate = new MessagingMethodInvokerHelper<T>(targetObject, methodName,
expectedType, true);
}
public MethodInvokingMessageListProcessor(Object targetObject, String methodName) {
this.delegate = new MessagingMethodInvokerHelper<T>(targetObject, methodName, true);
}
public MethodInvokingMessageListProcessor(Object targetObject, Class<? extends Annotation> annotationType) {
this.delegate = new MessagingMethodInvokerHelper<T>(targetObject, annotationType, Object.class, true);
}
@Override
public void setBeanFactory(BeanFactory beanFactory) {
super.setBeanFactory(beanFactory);
this.delegate.setBeanFactory(beanFactory);
}
/**
* A {@code boolean} flag to use SpEL Expression evaluation or
* {@link org.springframework.messaging.handler.invocation.InvocableHandlerMethod}
* for target method invocation.
* @param useSpelInvoker to use SpEL Expression evaluation or not.
* @since 5.0
*/
public void setUseSpelInvoker(boolean useSpelInvoker) {
this.delegate.setUseSpelInvoker(useSpelInvoker);
}
public String toString() {
return this.delegate.toString();
}
public T process(Collection<Message<?>> messages, Map<String, Object> aggregateHeaders) {
try {
return this.delegate.process(messages, aggregateHeaders);
}
catch (RuntimeException e) {
throw e;
}
catch (Exception e) {
throw new IllegalStateException("Failed to process message list", e);
}
}
@Override
public void start() {
this.delegate.start();
}
@Override
public void stop() {
this.delegate.stop();
}
@Override
public boolean isRunning() {
return this.delegate.isRunning();
}
}