/*
* 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.rmi;
import java.io.Serializable;
import org.springframework.integration.gateway.RequestReplyExchanger;
import org.springframework.integration.handler.AbstractReplyProducingMessageHandler;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHandlingException;
import org.springframework.messaging.MessagingException;
import org.springframework.remoting.RemoteAccessException;
import org.springframework.remoting.rmi.RmiProxyFactoryBean;
/**
* An outbound Messaging Gateway for RMI-based remoting.
*
* @author Mark Fisher
* @author Gary Russell
* @author Artem Bilan
*/
public class RmiOutboundGateway extends AbstractReplyProducingMessageHandler {
private final RequestReplyExchanger proxy;
private final RmiProxyFactoryBeanConfigurer configurer;
/**
* Construct an instance with a `RequestReplyExchanger` built from the
* default {@link RmiProxyFactoryBean}.
* @param url the url.
*/
public RmiOutboundGateway(String url) {
this(url, null);
}
/**
* Construct an instance with a `RequestReplyExchanger` built from the
* default {@link RmiProxyFactoryBean} which can be modified by the
* configurer.
* @param url the url.
* @param configurer the {@link RmiProxyFactoryBeanConfigurer}.
* @since 4.3.2
*/
public RmiOutboundGateway(String url, RmiProxyFactoryBeanConfigurer configurer) {
this.configurer = configurer;
this.proxy = createProxy(url);
}
public void setReplyChannel(MessageChannel replyChannel) {
setOutputChannel(replyChannel);
}
@Override
public String getComponentType() {
return "rmi:outbound-gateway";
}
@Override
public final Object handleRequestMessage(Message<?> requestMessage) {
if (!(requestMessage.getPayload() instanceof Serializable)) {
throw new MessageHandlingException(requestMessage,
this.getComponentName() + " expects a Serializable payload type " +
"but encountered [" + requestMessage.getPayload().getClass().getName() + "]");
}
try {
return this.proxy.exchange(requestMessage);
}
catch (MessagingException e) {
throw new MessageHandlingException(requestMessage, e);
}
catch (RemoteAccessException e) {
throw new MessageHandlingException(requestMessage, "Remote failure in RmiOutboundGateway: " +
this.getComponentName(), e);
}
}
private RequestReplyExchanger createProxy(String url) {
RmiProxyFactoryBean proxyFactory = new RmiProxyFactoryBean();
proxyFactory.setServiceInterface(RequestReplyExchanger.class);
proxyFactory.setServiceUrl(url);
proxyFactory.setLookupStubOnStartup(false);
proxyFactory.setRefreshStubOnConnectFailure(true);
if (this.configurer != null) {
this.configurer.configure(proxyFactory);
}
proxyFactory.afterPropertiesSet();
return (RequestReplyExchanger) proxyFactory.getObject();
}
/**
* Allows configuration of the proxy factory bean before the RMI proxy is created.
* @since 4.3.2
*/
public interface RmiProxyFactoryBeanConfigurer {
/**
* Perform additional configuration of the factory bean before the
* {@code RequestReplyExchanger} is created.
* @param factoryBean the factory bean.
*/
void configure(RmiProxyFactoryBean factoryBean);
}
}