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org.apache.jcs.access.monitor.MonitorAccess	0%	0%

1		package org.apache.jcs.access.monitor;
2
3		/*
4		* Licensed to the Apache Software Foundation (ASF) under one
5		* or more contributor license agreements. See the NOTICE file
6		* distributed with this work for additional information
7		* regarding copyright ownership. The ASF licenses this file
8		* to you under the Apache License, Version 2.0 (the
9		* "License"); you may not use this file except in compliance
10		* with the License. You may obtain a copy of the License at
11		*
12		* http://www.apache.org/licenses/LICENSE-2.0
13		*
14		* Unless required by applicable law or agreed to in writing,
15		* software distributed under the License is distributed on an
16		* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17		* KIND, either express or implied. See the License for the
18		* specific language governing permissions and limitations
19		* under the License.
20		*/
21
22		import java.io.Serializable;
23		import java.util.ArrayList;
24		import java.util.Arrays;
25		import java.util.Hashtable;
26		import java.util.StringTokenizer;
27
28		import org.apache.commons.logging.Log;
29		import org.apache.commons.logging.LogFactory;
30		import org.apache.jcs.access.GroupCacheAccess;
31		import org.apache.jcs.engine.CacheConstants;
32		import org.apache.jcs.engine.behavior.ICache;
33		import org.apache.jcs.engine.control.CompositeCacheManager;
34
35		/**
36		* Exposes the simple monitoring methods to the public in a simple manner.
37		*/
38		public class MonitorAccess
39		implements Serializable
40		{
41		/** Don't change. */
42		private static final long serialVersionUID = 1002037665133774391L;
43
44		/** The logger. */
45	0	private static final Log log = LogFactory.getLog( MonitorAccess.class );
46
47		/** Description of the Field */
48		protected CompositeCacheManager cacheMgr;
49
50		/** Constructor for the MonitorAccess object */
51		public MonitorAccess()
52	0	{
53	0	synchronized ( GroupCacheAccess.class )
54		{
55	0	if ( this.cacheMgr == null )
56		{
57	0	this.cacheMgr = CompositeCacheManager.getInstance();
58		}
59	0	}
60	0	}
61
62		/**
63		* Removes all.
64		* <p>
65		* @param cacheName
66		* @param key
67		* @return an informative message about what was deleted.
68		*/
69		public String delete( String cacheName, String key )
70		{
71		// some junk to return for a synchronous call
72	0	String result = "";
73
74		try
75		{
76	0	ICache cache = this.cacheMgr.getCache( cacheName );
77
78	0	if ( key != null )
79		{
80	0	if ( key.toUpperCase().equals( "ALL" ) )
81		{
82	0	cache.removeAll();
83
84	0	if ( log.isDebugEnabled() )
85		{
86	0	log.debug( "Removed all elements from " + cacheName );
87		}
88	0	result = "key = " + key;
89	0	}
90		else
91		{
92	0	if ( log.isDebugEnabled() )
93		{
94	0	log.debug( "key = " + key );
95		}
96	0	result = "key = " + key;
97	0	StringTokenizer toke = new StringTokenizer( key, "_" );
98
99	0	while ( toke.hasMoreElements() )
100		{
101	0	String temp = (String) toke.nextElement();
102	0	cache.remove( key );
103
104	0	if ( log.isDebugEnabled() )
105		{
106	0	log.debug( "Removed " + temp + " from " + cacheName );
107		}
108	0	}
109		}
110	0	}
111		else
112		{
113	0	result = "key is null";
114		}
115
116		}
117	0	catch ( Exception e )
118		{
119	0	log.error( e );
120	0	}
121
122	0	return result;
123		}
124
125		/**
126		* Gives basic info on all the regions. Better to use getStats.
127		* <p>
128		* @return list of hashtables with keys (name,size,stat)
129		*/
130		public ArrayList overview()
131		{
132	0	ArrayList data = new ArrayList();
133
134	0	String[] list = this.cacheMgr.getCacheNames();
135	0	Arrays.sort( list );
136	0	for ( int i = 0; i < list.length; i++ )
137		{
138	0	Hashtable ht = new Hashtable();
139	0	String name = list[i];
140	0	ht.put( "name", name );
141
142	0	ICache cache = this.cacheMgr.getCache( name );
143	0	int size = cache.getSize();
144	0	ht.put( "size", Integer.toString( size ) );
145
146	0	int status = cache.getStatus();
147	0	String stat = status == CacheConstants.STATUS_ALIVE
148		? "ALIVE"
149		: status == CacheConstants.STATUS_DISPOSED
150		? "DISPOSED"
151		: status == CacheConstants.STATUS_ERROR
152		? "ERROR"
153		: "UNKNOWN";
154	0	ht.put( "stat", stat );
155
156	0	data.add( ht );
157		}
158	0	return data;
159		}
160		}

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