/*
* Copyright 2002-2008 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;
import org.springframework.core.NestedRuntimeException;
/**
* Generic remote access exception. A service proxy for any remoting
* protocol should throw this exception or subclasses of it, in order
* to transparently expose a plain Java business interface.
*
* <p>When using conforming proxies, switching the actual remoting protocol
* e.g. from Hessian to Burlap does not affect client code. Clients work
* with a plain natural Java business interface that the service exposes.
* A client object simply receives an implementation for the interface that
* it needs via a bean reference, like it does for a local bean as well.
*
* <p>A client may catch RemoteAccessException if it wants to, but as
* remote access errors are typically unrecoverable, it will probably let
* such exceptions propagate to a higher level that handles them generically.
* In this case, the client code doesn't show any signs of being involved in
* remote access, as there aren't any remoting-specific dependencies.
*
* <p>Even when switching from a remote service proxy to a local implementation
* of the same interface, this amounts to just a matter of configuration. Obviously,
* the client code should be somewhat aware that it <i>might be working</i>
* against a remote service, for example in terms of repeated method calls that
* cause unnecessary roundtrips etc. However, it doesn't have to be aware whether
* it is <i>actually working</i> against a remote service or a local implementation,
* or with which remoting protocol it is working under the hood.
*
* @author Juergen Hoeller
* @since 14.05.2003
*/
public class RemoteAccessException extends NestedRuntimeException {
/** Use serialVersionUID from Spring 1.2 for interoperability */
private static final long serialVersionUID = -4906825139312227864L;
/**
* Constructor for RemoteAccessException.
* @param msg the detail message
*/
public RemoteAccessException(String msg) {
super(msg);
}
/**
* Constructor for RemoteAccessException.
* @param msg the detail message
* @param cause the root cause (usually from using an underlying
* remoting API such as RMI)
*/
public RemoteAccessException(String msg, Throwable cause) {
super(msg, cause);
}
}
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