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Java > Open Source Codes > org > apache > cocoon > components > store > impl > DefaultTransientStore


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.cocoon.components.store.impl;
17
18 import org.apache.avalon.framework.parameters.ParameterException;
19 import org.apache.avalon.framework.parameters.Parameters;
20 import org.apache.excalibur.store.impl.MRUMemoryStore;
21
22 /**
23  * Default implementation of Cocoon's transient store. This is a <code>MRUMemoryStore</code>
24  * that cannot be backed by a persistent store (this ensure it is really transient).
25  *
26  * @author <a HREF="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
27  * @version CVS $Id: DefaultTransientStore.java 30932 2004-07-29 17:35:38Z vgritsenko $
28  */
29 public class DefaultTransientStore extends MRUMemoryStore {
30     
31     public void parameterize(Parameters params) throws ParameterException {
32         if (params.getParameterAsBoolean("use-persistent-cache", false)) {
33             throw new ParameterException("A transient store cannot be backed by a persistent store.");
34         }
35         super.parameterize(params);
36     }
37 }
38
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