| /* |
| * Copyright 1999-2005 The Apache Software Foundation. |
| * |
| * Licensed 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.components.pipeline.impl; |
| |
| import org.apache.avalon.framework.activity.Disposable; |
| import org.apache.avalon.framework.parameters.ParameterException; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.cocoon.caching.Cache; |
| import org.apache.cocoon.components.pipeline.AbstractProcessingPipeline; |
| import org.apache.cocoon.components.sax.XMLByteStreamCompiler; |
| import org.apache.cocoon.components.sax.XMLByteStreamInterpreter; |
| |
| /** |
| * This is the base class for all caching pipeline implementations. |
| * The pipeline can be configured with the {@link Cache} to use |
| * by specifying the <code>cache-role</code> parameter. |
| * |
| * @since 2.1 |
| * @version $Id$ |
| */ |
| public abstract class BaseCachingProcessingPipeline extends AbstractProcessingPipeline |
| implements Disposable { |
| |
| /** This is the Cache holding cached responses */ |
| protected Cache cache; |
| |
| /** The deserializer */ |
| protected XMLByteStreamInterpreter xmlDeserializer; |
| |
| /** The serializer */ |
| protected XMLByteStreamCompiler xmlSerializer; |
| |
| /** |
| * Parameterizable Interface - Configuration |
| */ |
| public void parameterize(Parameters params) |
| throws ParameterException { |
| super.parameterize(params); |
| |
| String cacheRole = params.getParameter("cache-role", Cache.ROLE); |
| if (getLogger().isDebugEnabled()) { |
| getLogger().debug("Using cache " + cacheRole); |
| } |
| |
| try { |
| this.cache = (Cache) this.manager.lookup(cacheRole); |
| } catch (ServiceException ce) { |
| throw new ParameterException("Unable to lookup cache: " + cacheRole, ce); |
| } |
| } |
| |
| /** |
| * Recyclable Interface |
| */ |
| public void recycle() { |
| this.xmlDeserializer = null; |
| this.xmlSerializer = null; |
| |
| super.recycle(); |
| } |
| |
| /** |
| * Disposable Interface |
| */ |
| public void dispose() { |
| if (null != this.manager) { |
| this.manager.release(this.cache); |
| } |
| this.cache = null; |
| this.manager = null; |
| } |
| } |