donaldp 2002/11/08 22:46:42
Added: fortress/src/java/org/apache/excalibur/fortress/handler
LEAwareComponentHandler.java
Log:
Add a ComponentHandler that passes through call to underlying ComponentHandler but
makes sure that the Extensions are called at correct places.
Revision Changes Path
1.1
jakarta-avalon-excalibur/fortress/src/java/org/apache/excalibur/fortress/handler/LEAwareComponentHandler.java
Index: LEAwareComponentHandler.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) @year@ 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 "Jakarta", "Avalon", "Excalibur" 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
[EMAIL PROTECTED]
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. For more information on the
Apache Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.excalibur.fortress.handler;
import org.apache.excalibur.fortress.lifecycle.LifecycleExtensionManager;
import org.apache.avalon.framework.context.Context;
/**
* A ComponentHandler that delegates to underlying handler but also
* calls relevent Lifecycle Extension handlers at the right time.
*
* @author <a href="mailto:peter@;apache.org">Peter Donald</a>
* @version CVS $Revision: 1.1 $ $Date: 2002/11/09 06:46:42 $
*/
public class LEAwareComponentHandler
implements ComponentHandler
{
private final ComponentHandler m_componentHandler;
private final LifecycleExtensionManager m_extManager;
private final Context m_context;
public LEAwareComponentHandler( final ComponentHandler componentHandler,
final LifecycleExtensionManager extManager,
final Context context )
{
if( null == componentHandler )
{
throw new NullPointerException( "componentHandler" );
}
if( null == extManager )
{
throw new NullPointerException( "extManager" );
}
if( null == context )
{
throw new NullPointerException( "context" );
}
m_componentHandler = componentHandler;
m_extManager = extManager;
m_context = context;
}
public boolean isLazy()
{
return m_componentHandler.isLazy();
}
public void prepareHandler()
throws Exception
{
m_componentHandler.prepareHandler();
}
/**
* Retrieve the object and execute access extensions.
*
* @return the object
* @throws Exception if unable to aquire object
*/
public Object get() throws Exception
{
final Object object = m_componentHandler.get();
m_extManager.executeAccessExtensions( object, m_context );
return object;
}
/**
* Return component and execute Release extensions.
*
* @param component the component
*/
public void put( final Object component )
{
try
{
m_extManager.executeReleaseExtensions( component, m_context );
}
catch( Exception e )
{
// REVISIT(MC): we need to log this somewhere
}
m_componentHandler.put( component );
}
}
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