mcconnell 2002/12/19 02:42:24
Modified: assembly/src/java/org/apache/avalon/assembly/lifecycle/context
DefaultContextualizationService.java
Added: assembly/src/java/org/apache/avalon/assembly/lifecycle/context
DefaultContextManager.xinfo
DefaultContextManager.java Contextualization.java
Log:
Added support for plugable context phase interface and supporting handler. The
contextualization stage is now indepedent of a particular interface (although the
default if the existing Contextualizable interface). Clients can define thier own
context strategy and eliminate the requirement for casting a context.
Revision Changes Path
1.6 +30 -4
avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/lifecycle/context/DefaultContextualizationService.java
Index: DefaultContextualizationService.java
===================================================================
RCS file:
/home/cvs/avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/lifecycle/context/DefaultContextualizationService.java,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -r1.5 -r1.6
--- DefaultContextualizationService.java 17 Dec 2002 09:55:24 -0000 1.5
+++ DefaultContextualizationService.java 19 Dec 2002 10:42:24 -0000 1.6
@@ -124,15 +124,16 @@
throw new NullPointerException( "object" );
}
+ Appliance provider = appliance.getContextProvider();
- if( object instanceof Contextualizable )
+ if(( provider != null ) || (object instanceof Contextualizable ))
{
if( getLogger().isDebugEnabled() )
{
- final String message =
- "[" + appliance.getProfile().getName() + "]";
+ final String message = appliance.toString();
getLogger().debug( message );
}
+
Context source;
if( appliance.getDeploymentContext() != null )
{
@@ -142,8 +143,33 @@
{
source = context;
}
+
Context standard =
createStandardContext( appliance, source );
+
+ if( provider != null )
+ {
+ if( getLogger().isDebugEnabled() )
+ {
+ final String message =
+ "Activating custom context: " + provider
+ + " for appliance: " + appliance;
+ getLogger().debug( message );
+ }
+
+ try
+ {
+ Contextualization handler = (Contextualization)
provider.access();
+ handler.contextualize( object, standard );
+ return;
+ }
+ catch( Throwable e )
+ {
+ final String error =
+ "Contextualization handler failure in appliance: " +
appliance;
+ throw new ContextException( error, e );
+ }
+ }
try
{
1.1
avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/lifecycle/context/DefaultContextManager.xinfo
Index: DefaultContextManager.xinfo
===================================================================
<?xml version="1.0"?>
<!DOCTYPE type
PUBLIC "-//AVALON/Component Type DTD Version 1.0//EN"
"http://jakarta.apache.org/avalon/dtds/meta/type_1_1.dtd"; >
<!--
Copyright (C) The Apache Software Foundation. All rights reserved.
This software is published under the terms of the Apache Software License
version 1.1, a copy of which has been included with this distribution in
the LICENSE.txt file.
@author Avalon Development Team
@version 1.0 12/03/2001
-->
<!--
Definition of the extension type phase support.
-->
<type>
<info>
<name>context</name>
</info>
<!--
Declaration of the lifecycle support phases that this manager provides.
-->
<extensions>
<extension type="org.apache.avalon.framework.context.Contextualizable:4.1"
phase="CONTEXT" />
</extensions>
</type>
1.1
avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/lifecycle/context/DefaultContextManager.java
Index: DefaultContextManager.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, 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", 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 (INCLUDING, 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.avalon.assembly.lifecycle.context;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.lifecycle.Creator;
import org.apache.avalon.assembly.appliance.Appliance;
/**
* Definition of an extension handler that handles the Contextualization
* process. This implementation is provided as a template for alternative
* context handlers. The requirements for introduction of an alternative
* handler include:
* <ul>
* <li>A class implementing the {@link Contextualization} interface.</li>
* <li>Declaration in the classes xinfo of the extension type where the
* type attribute value is a version interface reference corresponding
* to the interface that the target component must implement.</li>
* <li>Declaration by the target component in it's xinfo atttributes
* of the criteria for a custom context handler under the attribute
* key "urn:assembly:lifecycle.context.extension" and value
* corresponding to the extension type value. </li>
* <li>Implementation of the extension type interface by the target
* component.</li>
* </ul>
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Avalon Development Team</a>
*/
public class DefaultContextManager implements Contextualization
{
//=======================================================================
// Extension
//=======================================================================
/**
* Handle the contextualization stage of a component lifecycle.
* @param object the object to contextualize
* @param context the deployment context
* @exception ContextException if a contextualization error occurs
*/
public void contextualize( Object object, Context context )
throws ContextException
{
if( object instanceof Contextualizable )
{
( (Contextualizable)object ).contextualize( context );
}
}
}
1.1
avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/lifecycle/context/Contextualization.java
Index: Contextualization.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, 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", 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 (INCLUDING, 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.avalon.assembly.lifecycle.context;
import org.apache.avalon.assembly.appliance.Appliance;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
/**
* Definition of an extension handler that handles the Contextualize
* stage of a component lifecycle.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Avalon Development Team</a>
*/
public interface Contextualization
{
//=======================================================================
// Extension
//=======================================================================
/**
* Handle the contextualization stage of a component lifecycle.
* @param object the object to contextualize
* @param context the containement context
* @exception ContextException if a contextualization error occurs
*/
void contextualize( Object object, Context context )
throws ContextException;
}
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