/*
* 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.
*/
package org.apache.cocoon.transformation.helpers;
import java.util.Map;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.acting.ServiceableAction;
import org.apache.cocoon.environment.Redirector;
import org.apache.cocoon.environment.SourceResolver;
/**
* This action starts the preemptive loader and runs forever.
*
* @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
* @version CVS $Id$
* @since 2.1
*/
public class PreemptiveLoaderAction
extends ServiceableAction
implements ThreadSafe {
/**
* This action starts the preemptive loading
* It runs forever and is stopped by the {@link DefaultIncludeCacheManager}.
* @see org.apache.cocoon.acting.Action#act(Redirector, SourceResolver, Map, String, Parameters)
*/
public Map act(Redirector redirector,
SourceResolver resolver,
Map objectModel,
String source,
Parameters parameters)
throws Exception {
PreemptiveLoader loader = PreemptiveLoader.getInstance();
if (!loader.alive) {
loader.process(this.manager, resolver, this.getLogger());
return EMPTY_MAP;
}
return null;
}
}