/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.deployment.vfs;
import java.util.Collections;
import java.util.Date;
import org.jboss.virtual.spi.VFSContext;
import org.jboss.virtual.spi.cache.CacheStatistics;
import org.jboss.virtual.spi.cache.VFSCache;
import org.jboss.virtual.spi.cache.VFSCacheFactory;
/**
* Simple vfs cache statistics.
*
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public class VFSCacheStatistics implements VFSCacheStatisticsMBean
{
private CacheStatistics statistics;
public String listCachedContexts()
{
StringBuilder builder = new StringBuilder();
builder.append("<table><tr><th>VFSContext - root URI</th></tr>");
for (VFSContext context : getStatistics().getCachedContexts())
{
builder.append("<tr>");
builder.append("<td>").append(context.getRootURI()).append("</td>");
builder.append("</tr>");
}
builder.append("</table>");
return builder.toString();
}
public int size()
{
return getStatistics().size();
}
public Date lastInsert()
{
long lastInsert = getStatistics().lastInsert();
return (lastInsert > 0) ? new Date(lastInsert) : null;
}
public String cacheToString()
{
return getStatistics().toString();
}
private CacheStatistics getStatistics()
{
if (statistics == null)
{
VFSCache cache = VFSCacheFactory.getInstance();
if (cache instanceof CacheStatistics)
{
statistics = CacheStatistics.class.cast(cache);
}
else
{
statistics = new CacheStatistics()
{
public Iterable<VFSContext> getCachedContexts()
{
return Collections.emptySet();
}
public int size()
{
return -1;
}
public long lastInsert()
{
return -1;
}
};
}
}
return statistics;
}
@Override
public String toString()
{
return "Noop Cache / Statistics";
}
}