/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.virtual.plugins.cache;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.jboss.logging.Logger;
import org.jboss.virtual.VFS;
import org.jboss.virtual.spi.ExceptionHandler;
import org.jboss.virtual.spi.TempStore;
/**
* Initialize vfs contexts - performance improvements.
*
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public class PreInitializeVFSContexts
{
protected Logger log = Logger.getLogger(getClass());
private Map<URL, ExceptionHandler> initializedVFSContexts;
private Map<URL, TempStore> tempStores;
private boolean holdReference;
private List<VFS> references;
/**
* Start initializer.
*
* @throws Exception for any exception
*/
public void start() throws Exception
{
Map<URL, VFS> refs = new HashMap<URL, VFS>();
// apply exception handlers
if (initializedVFSContexts != null && initializedVFSContexts.isEmpty() == false)
{
for (Map.Entry<URL, ExceptionHandler> entry : initializedVFSContexts.entrySet())
{
URL url = entry.getKey();
VFS vfs = VFS.getVFS(url);
ExceptionHandler eh = entry.getValue();
if (eh != null)
vfs.setExceptionHandler(eh);
log.debug("Initialized Virtual File: " + vfs.getRoot());
refs.put(url, vfs);
}
}
// apply stores
if (tempStores != null && tempStores.isEmpty() == false)
{
for (Map.Entry<URL, TempStore> entry : tempStores.entrySet())
{
URL url = entry.getKey();
VFS vfs = refs.get(url);
if (vfs == null)
{
vfs = VFS.getVFS(url);
log.debug("Initialized Virtual File: " + vfs.getRoot());
refs.put(url, vfs);
}
TempStore ts = entry.getValue();
if (ts != null)
vfs.setTempStore(ts);
}
}
if (holdReference)
references = new ArrayList<VFS>(refs.values());
}
/**
* Clear possible references.
*/
public void stop()
{
if (references != null)
references.clear();
}
/**
* Get VFS references.
*
* @return the VFS references
*/
public List<VFS> getReferences()
{
if (references == null || references.isEmpty())
return Collections.emptyList();
else
return Collections.unmodifiableList(references);
}
/**
* Set URLs that need to be initialized before anything else.
*
* @param initializedVFSContexts the URLs to be initialized
*/
public void setInitializedVFSContexts(Map<URL, ExceptionHandler> initializedVFSContexts)
{
this.initializedVFSContexts = initializedVFSContexts;
}
/**
* Set temp stores.
*
* @param tempStores the temp stores
*/
public void setTempStores(Map<URL, TempStore> tempStores)
{
this.tempStores = tempStores;
}
/**
* Should we hold the reference to initialized VFSs.
*
* @param holdReference the hold reference flag
*/
public void setHoldReference(boolean holdReference)
{
this.holdReference = holdReference;
}
}