01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.acting;
18:
19: import org.apache.avalon.framework.parameters.Parameters;
20: import org.apache.avalon.framework.thread.ThreadSafe;
21: import org.apache.cocoon.caching.Cache;
22: import org.apache.cocoon.environment.Redirector;
23: import org.apache.cocoon.environment.SourceResolver;
24:
25: import java.util.Map;
26:
27: /**
28: * Simple action which ensures the cache is cleared of all
29: * cached results
30: *
31: * @author <a href="mailto:Michael.Melhem@managesoft.com">Michael Melhem</a>
32: * @version CVS $Id: ClearCacheAction.java 433543 2006-08-22 06:22:54Z crossley $
33: */
34: public class ClearCacheAction extends ServiceableAction implements
35: ThreadSafe {
36:
37: public Map act(Redirector redirector, SourceResolver resolver,
38: Map objectModel, String src, Parameters par)
39: throws Exception {
40: final String cacheRole = par.getParameter("cache-role",
41: Cache.ROLE);
42: Cache cache = null;
43:
44: try {
45: cache = (Cache) this .manager.lookup(cacheRole);
46: cache.clear();
47: return EMPTY_MAP;
48: } catch (Exception ex) {
49: if (this .getLogger().isDebugEnabled()) {
50: getLogger().debug(
51: "Exception while trying to clear Cache with role "
52: + cacheRole, ex);
53: }
54: return null;
55: } finally {
56: this.manager.release(cache);
57: }
58: }
59: }
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