/*
* 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.support;
import java.util.HashSet;
import java.util.Set;
import org.springframework.core.JdkVersion;
/**
* General utilities for handling remote invocations.
*
* <p>Mainly intended for use within the remoting framework.
*
* @author Juergen Hoeller
* @since 2.0
*/
public abstract class RemoteInvocationUtils {
/**
* Fill the current client-side stack trace into the given exception.
* <p>The given exception is typically thrown on the server and serialized
* as-is, with the client wanting it to contain the client-side portion
* of the stack trace as well. What we can do here is to update the
* <code>StackTraceElement</code> array with the current client-side stack
* trace, provided that we run on JDK 1.4+.
* @param ex the exception to update
* @see java.lang.Throwable#getStackTrace()
* @see java.lang.Throwable#setStackTrace(StackTraceElement[])
*/
public static void fillInClientStackTraceIfPossible(Throwable ex) {
if (ex != null) {
StackTraceElement[] clientStack = new Throwable().getStackTrace();
Set<Throwable> visitedExceptions = new HashSet<Throwable>();
Throwable exToUpdate = ex;
while (exToUpdate != null && !visitedExceptions.contains(exToUpdate)) {
StackTraceElement[] serverStack = exToUpdate.getStackTrace();
StackTraceElement[] combinedStack = new StackTraceElement[serverStack.length + clientStack.length];
System.arraycopy(serverStack, 0, combinedStack, 0, serverStack.length);
System.arraycopy(clientStack, 0, combinedStack, serverStack.length, clientStack.length);
exToUpdate.setStackTrace(combinedStack);
visitedExceptions.add(exToUpdate);
exToUpdate = exToUpdate.getCause();
}
}
}
}
|