donaldp 2002/10/31 13:52:31
Modified: lib/container excalibur-loader-1.0a.jar
Added: src/java/org/apache/avalon/phoenix/components/classloader
SarLoaderResolver.java
Log:
Start to implement a LoaderResolver in preparation for converting Phoenix to a more
comprehensive ClassLoader Management.
Revision Changes Path
1.5 +341 -106 jakarta-avalon-phoenix/lib/container/excalibur-loader-1.0a.jar
<<Binary file>>
1.1
jakarta-avalon-phoenix/src/java/org/apache/avalon/phoenix/components/classloader/SarLoaderResolver.java
Index: SarLoaderResolver.java
===================================================================
/*
* 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.
*/
package org.apache.avalon.phoenix.components.classloader;
import org.apache.excalibur.loader.builder.DefaultLoaderResolver;
import org.apache.avalon.excalibur.packagemanager.PackageManager;
import org.apache.avalon.framework.logger.LogEnabled;
import org.apache.avalon.framework.logger.Logger;
import org.apache.avalon.framework.container.ContainerUtil;
import java.net.URL;
import java.security.Policy;
import java.io.File;
/**
* a LoaderResolver that knows about Phoenixs environment,
* and the way it is split across multiple directories.
*
* @author <a href="mailto:peter at apache.org">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/10/31 21:52:31 $
*/
class SarLoaderResolver
extends DefaultLoaderResolver
implements LogEnabled
{
/**
* Logger to use when reporting information
*/
private Logger m_logger;
/**
* The policy object to use when creating ClassLoaders
*/
private Policy m_policy;
/**
* Base work directory for application.
*/
private File m_workDirectory;
/**
* Create a resolver for a jar.
* The resolver merges both the work and base directory
* hierarchies.
*
* @param manager the PackageManager
* @param policy the policy to use when creating classloaders
* @param baseDirectory the base directory
* @param workDirectory the base work directory
*/
SarLoaderResolver( final PackageManager manager,
final Policy policy,
final File baseDirectory,
final File workDirectory )
{
super( baseDirectory, manager );
if( null == policy )
{
throw new NullPointerException( "policy" );
}
if( null == baseDirectory )
{
throw new NullPointerException( "baseDirectory" );
}
if( null == workDirectory )
{
throw new NullPointerException( "workDirectory" );
}
m_policy = policy;
m_workDirectory = workDirectory;
}
/**
* Aquire an Avalon Logger.
*
* @param logger the avalon logger
*/
public void enableLogging( final Logger logger )
{
m_logger = logger;
}
/**
* Resolve a fileset. Make sure it is resolved against
* both the work and the base directories of application.
*
* @param baseDirectory the base directory of fileset
* @param includes the fileset includes
* @param excludes the ant style excludes
* @return the URLs that are in fileset
* @throws Exception if unable to resolve fileset
*/
public URL[] resolveFileSet( final String baseDirectory,
final String[] includes,
final String[] excludes )
throws Exception
{
final URL[] baseURLs =
resolveFileSet( getBaseDirectory(), baseDirectory, includes, excludes );
final URL[] workURLs =
resolveFileSet( m_workDirectory, baseDirectory, includes, excludes );
final URL[] urls = new URL[ baseURLs.length + workURLs.length ];
System.arraycopy( baseURLs, 0, urls, 0, baseURLs.length );
System.arraycopy( workURLs, 0, urls, baseURLs.length, workURLs.length );
return urls;
}
/**
* Create a ClassLoader that obeys policy in environment.xml.
*
* @param parent the parent classloader
* @param urls the set of URLs for classloader
* @return the new classloader
* @throws Exception if unable to create classloader
*/
public ClassLoader createClassLoader( final ClassLoader parent,
final URL[] urls )
throws Exception
{
final PolicyClassLoader loader =
new PolicyClassLoader( urls, parent, m_policy );
ContainerUtil.enableLogging( loader, m_logger );
return loader;
}
/**
* Route Logging to Avalons Logger.
*
* @param message the debug message
*/
protected void debug( final String message )
{
m_logger.debug( message );
}
/**
* Defer to Avalons Logger to see if debug is enabled.
*
* @return true if debug is enabled
*/
protected boolean isDebugEnabled()
{
return m_logger.isDebugEnabled();
}
/**
* Route Logging to Avalons Logger.
*
* @param message the warn message
*/
protected void warn( final String message )
{
m_logger.warn( message );
}
}
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