/*
* 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.cache.eviction;
import junit.framework.TestCase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jboss.cache.ConfigureException;
import org.jboss.cache.Fqn;
import org.jboss.cache.TreeCache;
import org.w3c.dom.Element;
import EDU.oswego.cs.dl.util.concurrent.BoundedBuffer;
import EDU.oswego.cs.dl.util.concurrent.Callable;
import EDU.oswego.cs.dl.util.concurrent.Executor;
import EDU.oswego.cs.dl.util.concurrent.FutureResult;
import EDU.oswego.cs.dl.util.concurrent.ThreadedExecutor;
import EDU.oswego.cs.dl.util.concurrent.TimeoutException;
/**
* Tests BaseEvictionAlgorithm class.
*
* @author <a href="mailto:galder.zamarreno@jboss.com">Galder Zamarreno</a>
*/
public class BaseEvictionAlgorithmTest extends TestCase
{
private static final Log log = LogFactory.getLog(BaseEvictionAlgorithmTest.class);
private RegionManager regionManager;
public void setUp() throws Exception
{
regionManager = new RegionManager();
}
public void testFillUpRecycleQueue() throws Exception
{
final int recycleQueueCapacity = 10;
/* override recycle queue capacity to make the test shorter */
BaseEvictionAlgorithm algorithm = new MockEvictionAlgorithm(recycleQueueCapacity);
Region region = regionManager.createRegion("/a/b/c", new MockEvictionPolicy(), null);
for (int i = 0; i < (recycleQueueCapacity + 1); i ++)
{
Fqn fqn = Fqn.fromString("/a/b/c/" + Integer.toString(i + 1));
region.putNodeEvent(new EvictedEventNode(fqn, EvictedEventNode.ADD_NODE_EVENT));
}
Executor executor = new ThreadedExecutor();
FutureResult future = new FutureResult();
Runnable command = future.setter(new ProcessEvictionRegion(region, algorithm));
executor.execute(command);
try
{
future.timedGet(20000);
}
catch(TimeoutException te)
{
log.error("Region eviction processing did not finish on time", te);
fail("Region eviction processing should have finished by now, something is wrong. Recycle queue may have filled up.");
}
finally
{
log.info("recycle queue size: " + algorithm.recycleQueue.size());
}
}
/** Classes **/
public static class MockEvictionAlgorithm extends BaseEvictionAlgorithm
{
public MockEvictionAlgorithm(int recycleQueueCapacity)
{
recycleQueue = new BoundedBuffer(recycleQueueCapacity);
}
protected EvictionQueue setupEvictionQueue(Region region) throws EvictionException
{
return new LRUQueue();
}
protected boolean shouldEvictNode(NodeEntry ne)
{
/* all node entries need evicting */
return true;
}
}
public static class MockEvictionPolicy extends BaseEvictionPolicy
{
public void evict(Fqn fqn) throws Exception
{
throw new Exception("Unable to evict");
}
public void configure(TreeCache cache)
{
/* no op */
}
public EvictionAlgorithm getEvictionAlgorithm()
{
return null;
}
public Class getEvictionConfigurationClass()
{
return MockEvictionPolicyConfig.class;
}
}
public static class MockEvictionPolicyConfig implements EvictionConfiguration
{
public void parseXMLConfig(Element element) throws ConfigureException
{
/* no op */
}
}
public class ProcessEvictionRegion implements Callable
{
private Region region;
private EvictionAlgorithm algorithm;
public ProcessEvictionRegion(Region region, EvictionAlgorithm algorithm)
{
this.region = region;
this.algorithm = algorithm;
}
public Object call() throws Exception
{
try
{
algorithm.process(region);
}
catch(EvictionException e)
{
log.error("Eviction exception reported", e);
fail("Eviction exception reported" + e);
}
return null;
}
}
}