/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <stefano@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.components.treeprocessor.sitemap;
import java.util.Map;
import org.apache.avalon.framework.component.ComponentManager;
import org.apache.avalon.framework.component.Composable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.cocoon.Constants;
import org.apache.cocoon.components.notification.Notifying;
import org.apache.cocoon.components.notification.NotifyingBuilder;
import org.apache.cocoon.components.treeprocessor.InvokeContext;
import org.apache.cocoon.components.treeprocessor.ProcessingNode;
import org.apache.cocoon.environment.Environment;
import org.apache.cocoon.environment.ObjectModelHelper;
/**
* Helps to call error handlers from PipelineNode and PipelinesNode.
*
* @author <a href="mailto:juergen.seitz@basf-it-services.com">J�rgen Seitz</a>
* @author <a href="mailto:bluetkemeier@s-und-n.de">Bj�rn L�tkemeier</a>
* @version CVS $Id: ErrorHandlerHelper.java,v 1.2 2003/04/29 10:45:20 cziegeler Exp $
*/
public class ErrorHandlerHelper extends AbstractLogEnabled implements Composable {
private ComponentManager manager;
/**
* The component manager is used to create notifying builders.
*/
public void compose(ComponentManager manager) {
this.manager = manager;
}
public boolean invokeErrorHandler(ProcessingNode node, Exception ex, Environment env)
throws Exception {
Map objectModel = env.getObjectModel();
InvokeContext errorContext = null;
boolean nodeSuccessfull = false;
try {
if (objectModel.get(Constants.NOTIFYING_OBJECT) == null) {
// error has not been processed by another handler before
// Try to reset the response to avoid mixing already produced output
// and error page.
env.tryResetResponse();
// Create a Notifying
NotifyingBuilder notifyingBuilder= (NotifyingBuilder)this.manager.lookup(NotifyingBuilder.ROLE);
Notifying currentNotifying = null;
try {
currentNotifying = notifyingBuilder.build(this, ex);
} finally {
this.manager.release(notifyingBuilder);
}
// Add it to the object model
objectModel.put(Constants.NOTIFYING_OBJECT, currentNotifying);
// Also add the exception
objectModel.put(ObjectModelHelper.THROWABLE_OBJECT, ex);
}
// Build a new context
errorContext = new InvokeContext();
errorContext.enableLogging(getLogger());
errorContext.compose(this.manager);
nodeSuccessfull = node.invoke(env, errorContext);
} catch (Exception subEx) {
getLogger().error("An exception occured in while handling errors at " + node.getLocation(), subEx);
// Rethrow it : it will either be handled by the parent sitemap or by the environment (e.g. Cocoon servlet)
throw subEx;
} finally {
if (errorContext != null) {
errorContext.dispose();
}
}
if (nodeSuccessfull) {
return true;
} else {
throw ex;
}
}
}