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Java > Open Source Codes > org > apache > geronimo > clustering > ejb > EJBTier


1 /**
2  *
3  * Copyright 2003-2004 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * 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 implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */

17
18 package org.apache.geronimo.clustering.ejb;
19
20 import java.util.HashMap JavaDoc;
21 import java.util.Iterator JavaDoc;
22 import java.util.Map JavaDoc;
23
24 import org.apache.geronimo.clustering.Tier;
25
26 /**
27  * Responsible for maintaining state stored in the EJB tier -
28  * i.e. StatefulSessions.
29  *
30  * @version $Rev: 46019 $ $Date: 2004-09-14 02:56:06 -0700 (Tue, 14 Sep 2004) $
31  */

32 public class
33   EJBTier
34   extends Tier
35 {
36   // protected Log _log=LogFactory.getLog(EJBTier.class);
37

38   //----------------------------------------
39
// EJBTier
40
//----------------------------------------
41

42   protected Object JavaDoc alloc(){return new HashMap JavaDoc();}
43   public Object JavaDoc registerData(String JavaDoc uid, Object JavaDoc data) {synchronized (_tier) {return ((Map JavaDoc)_tier).put(uid, data);}}
44   public Object JavaDoc deregisterData(String JavaDoc uid) {synchronized (_tier){return ((Map JavaDoc)_tier).remove(uid);}}
45
46   public int
47     getAppCount()
48   {
49     return ((Map JavaDoc)_tier).size();
50   }
51
52   public int
53     getStatefulSessionCount()
54   {
55     int count=0;
56     synchronized (_tier) // values() returns a view, so we need to hold a lock...
57
{
58       for (Iterator JavaDoc i=((Map JavaDoc)_tier).values().iterator(); i.hasNext();)
59       {
60     Map JavaDoc app=(Map JavaDoc)i.next();
61     // TODO - how we synchronise here depends on the apps locking strategy - NYI...
62
synchronized (app){count+=app.size();}
63       }
64     }
65     return count;
66   }
67
68   //----------------------------------------
69
// GeronimoMBeanTarget
70
//----------------------------------------
71
/*
72   public static GeronimoMBeanInfo
73     getGeronimoMBeanInfo()
74   {
75     GeronimoMBeanInfo mbeanInfo=Tier.getGeronimoMBeanInfo();
76     mbeanInfo.setTargetClass(EJBTier.class);
77     mbeanInfo.addAttributeInfo(new GeronimoAttributeInfo("AppCount", true, false, "Number of Apps deployed in this Tier"));
78     mbeanInfo.addAttributeInfo(new GeronimoAttributeInfo("StatefulSessionCount", true, false, "Number of Stateful Sessions stored in this Tier"));
79     return mbeanInfo;
80   }
81   */

82 }
83
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