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package org.apache.maven.project;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.codehaus.plexus.classworlds.realm.NoSuchRealmException;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Disposable;
import org.eclipse.aether.graph.DependencyFilter;
/**
* Default project realm cache implementation. Assumes cached data does not change.
*/
@Component( role = ProjectRealmCache.class )
public class DefaultProjectRealmCache
implements ProjectRealmCache, Disposable
{
protected static class CacheKey
implements Key
{
private final List<? extends ClassRealm> extensionRealms;
private final int hashCode;
public CacheKey( List<? extends ClassRealm> extensionRealms )
{
this.extensionRealms = ( extensionRealms != null ) ? extensionRealms : Collections.<ClassRealm>emptyList();
this.hashCode = this.extensionRealms.hashCode();
}
@Override
public int hashCode()
{
return hashCode;
}
@Override
public boolean equals( Object o )
{
if ( o == this )
{
return true;
}
if ( !( o instanceof CacheKey ) )
{
return false;
}
CacheKey other = (CacheKey) o;
return extensionRealms.equals( other.extensionRealms );
}
@Override
public String toString()
{
return extensionRealms.toString();
}
}
protected final Map<Key, CacheRecord> cache = new ConcurrentHashMap<Key, CacheRecord>();
@Override
public Key createKey( List<? extends ClassRealm> extensionRealms )
{
return new CacheKey( extensionRealms );
}
public CacheRecord get( Key key )
{
return cache.get( key );
}
public CacheRecord put( Key key, ClassRealm projectRealm, DependencyFilter extensionArtifactFilter )
{
if ( projectRealm == null )
{
throw new NullPointerException();
}
if ( cache.containsKey( key ) )
{
throw new IllegalStateException( "Duplicate project realm for extensions " + key );
}
CacheRecord record = new CacheRecord( projectRealm, extensionArtifactFilter );
cache.put( key, record );
return record;
}
public void flush()
{
for ( CacheRecord record : cache.values() )
{
ClassRealm realm = record.realm;
try
{
realm.getWorld().disposeRealm( realm.getId() );
}
catch ( NoSuchRealmException e )
{
// ignore
}
}
cache.clear();
}
public void register( MavenProject project, Key key, CacheRecord record )
{
// default cache does not track record usage
}
@Override
public void dispose()
{
flush();
}
}
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