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Java > Open Source Codes > org > apache > excalibur > instrument > manager > http > HTMLGCHandler


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * 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
14  * implied.
15  *
16  * See the License for the specific language governing permissions and
17  * limitations under the License.
18  */
19
20 package org.apache.excalibur.instrument.manager.http;
21
22 import java.io.IOException JavaDoc;
23 import java.io.PrintWriter JavaDoc;
24 import java.util.Map JavaDoc;
25
26 import org.apache.excalibur.instrument.manager.http.server.HTTPRedirect;
27 import org.apache.excalibur.instrument.manager.DefaultInstrumentManager;
28 import org.apache.excalibur.instrument.manager.InstrumentSampleDescriptor;
29 import org.apache.excalibur.instrument.manager.NoSuchInstrumentSampleException;
30
31 /**
32  *
33  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
34  * @version CVS $Revision: 1.6 $ $Date: 2004/03/06 14:01:28 $
35  * @since 4.1
36  */
37 public class HTMLGCHandler
38     extends AbstractHTMLHandler
39 {
40     /*---------------------------------------------------------------
41      * Constructors
42      *-------------------------------------------------------------*/
43     /**
44      * Creates a new HTMLGCHandler.
45      *
46      * @param manager Reference to the DefaultInstrumentManager.
47      * @param connector The InstrumentManagerHTTPConnector.
48      */
49     public HTMLGCHandler( DefaultInstrumentManager manager,
50                           InstrumentManagerHTTPConnector connector )
51     {
52         super( "/gc.html", manager, connector );
53     }
54     
55     /*---------------------------------------------------------------
56      * AbstractHTTPURLHandler Methods
57      *-------------------------------------------------------------*/
58     /**
59      * Handles the specified request.
60      *
61      * @param The full path being handled.
62      * @param parameters A Map of the parameters in the request.
63      * @param os The PrintWriter to write the result to.
64      */
65     public void doGet( String JavaDoc path, Map JavaDoc parameters, PrintWriter JavaDoc out )
66         throws IOException JavaDoc
67     {
68         long oldMemory = getMemory();
69         
70         System.gc();
71         
72         long newMemory = getMemory();
73         
74         throw new HTTPRedirect(
75             "instrument-manager.html?oldMemory=" + oldMemory + "&newMemory=" + newMemory );
76     }
77             
78     /*---------------------------------------------------------------
79      * Methods
80      *-------------------------------------------------------------*/
81     private long getMemory()
82     {
83         Runtime JavaDoc rt = Runtime.getRuntime();
84         return rt.totalMemory() - rt.freeMemory();
85     }
86 }
87
88
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