/*
* Copyright 2002-2009 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.remoting.httpinvoker;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.beans.factory.FactoryBean;
/**
* {@link FactoryBean} for HTTP invoker proxies. Exposes the proxied service
* for use as a bean reference, using the specified service interface.
*
* <p>The service URL must be an HTTP URL exposing an HTTP invoker service.
* Optionally, a codebase URL can be specified for on-demand dynamic code download
* from a remote location. For details, see HttpInvokerClientInterceptor docs.
*
* <p>Serializes remote invocation objects and deserializes remote invocation
* result objects. Uses Java serialization just like RMI, but provides the
* same ease of setup as Caucho's HTTP-based Hessian and Burlap protocols.
*
* <p><b>HTTP invoker is the recommended protocol for Java-to-Java remoting.</b>
* It is more powerful and more extensible than Hessian and Burlap, at the
* expense of being tied to Java. Nevertheless, it is as easy to set up as
* Hessian and Burlap, which is its main advantage compared to RMI.
*
* @author Juergen Hoeller
* @since 1.1
* @see #setServiceInterface
* @see #setServiceUrl
* @see #setCodebaseUrl
* @see HttpInvokerClientInterceptor
* @see HttpInvokerServiceExporter
* @see org.springframework.remoting.rmi.RmiProxyFactoryBean
* @see org.springframework.remoting.caucho.HessianProxyFactoryBean
* @see org.springframework.remoting.caucho.BurlapProxyFactoryBean
*/
public class HttpInvokerProxyFactoryBean extends HttpInvokerClientInterceptor
implements FactoryBean<Object> {
private Object serviceProxy;
@Override
public void afterPropertiesSet() {
super.afterPropertiesSet();
if (getServiceInterface() == null) {
throw new IllegalArgumentException("Property 'serviceInterface' is required");
}
this.serviceProxy = new ProxyFactory(getServiceInterface(), this).getProxy(getBeanClassLoader());
}
public Object getObject() {
return this.serviceProxy;
}
public Class<?> getObjectType() {
return getServiceInterface();
}
public boolean isSingleton() {
return true;
}
}
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