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Spring Framework example source code file (RmiBasedExporter.java)

This example Spring Framework source code file (RmiBasedExporter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

illegalaccessexception, invocationtargetexception, invocationtargetexception, nosuchmethodexception, object, object, reflection, remote, remote, remoteinvocationbasedexporter, rmi, rmi, rmibasedexporter, rmiinvocationwrapper

The Spring Framework RmiBasedExporter.java source code

/*
 * Copyright 2002-2005 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.rmi;

import java.lang.reflect.InvocationTargetException;
import java.rmi.Remote;

import org.springframework.remoting.support.RemoteInvocation;
import org.springframework.remoting.support.RemoteInvocationBasedExporter;

/**
 * Convenient superclass for RMI-based remote exporters. Provides a facility
 * to automatically wrap a given plain Java service object with am
 * RmiInvocationWrapper, exposing the RmiInvocationHandler interface.
 *
 * <p>With an RMI invoker, RMI communication works on the RmiInvocationHandler
 * level, needing only one stub for any service. Service interfaces do not have to
 * extend <code>java.rmi.Remote or throw java.rmi.RemoteException
 * on all methods, but in and out parameters have to be serializable.
 *
 * @author Juergen Hoeller
 * @since 1.2.5
 * @see RmiServiceExporter
 * @see JndiRmiServiceExporter
 */
public abstract class RmiBasedExporter extends RemoteInvocationBasedExporter {

	/**
	 * Determine the object to export: either the service object itself
	 * or a RmiInvocationWrapper in case of a non-RMI service object.
	 * @return the RMI object to export
	 * @see #setService
	 * @see #setServiceInterface
	 */
	protected Remote getObjectToExport() {
		// determine remote object
		if (getService() instanceof Remote &&
				((getServiceInterface() == null) || Remote.class.isAssignableFrom(getServiceInterface()))) {
			// conventional RMI service
			return (Remote) getService();
		}
		else {
			// RMI invoker
			if (logger.isDebugEnabled()) {
				logger.debug("RMI service [" + getService() + "] is an RMI invoker");
			}
			return new RmiInvocationWrapper(getProxyForService(), this);
		}
	}

	/**
	 * Redefined here to be visible to RmiInvocationWrapper.
	 * Simply delegates to the corresponding superclass method.
	 */
	protected Object invoke(RemoteInvocation invocation, Object targetObject)
			throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {

		return super.invoke(invocation, targetObject);
	}

}

Other Spring Framework examples (source code examples)

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