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Java > Open Source Codes > org > jacorb > notification > impl > PoolingEvaluationContextFactory


1 /*
2  * JacORB - a free Java ORB
3  *
4  * Copyright (C) 1999-2004 Gerald Brose
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the Free
18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  *
20  */
21
22 package org.jacorb.notification.impl;
23
24 import org.apache.avalon.framework.configuration.Configuration;
25 import org.jacorb.notification.filter.ETCLEvaluator;
26 import org.jacorb.notification.filter.EvaluationContext;
27 import org.jacorb.notification.interfaces.EvaluationContextFactory;
28 import org.jacorb.notification.util.AbstractObjectPool;
29 import org.jacorb.notification.util.AbstractPoolable;
30
31 /**
32  * @author Alphonse Bendt
33  * @version $Id: PoolingEvaluationContextFactory.java,v 1.2 2005/04/16 23:29:53 alphonse.bendt Exp $
34  */
35 public class PoolingEvaluationContextFactory implements EvaluationContextFactory
36 {
37     private final AbstractObjectPool evaluationContextPool_;
38
39     public PoolingEvaluationContextFactory(final Configuration configuration,
40                 final ETCLEvaluator evaluator)
41     {
42         evaluationContextPool_ = new AbstractObjectPool("EvaluationContextPool")
43         {
44             public Object JavaDoc newInstance()
45             {
46                 return new EvaluationContext(evaluator);
47             }
48
49             public void activateObject(Object JavaDoc o)
50             {
51                 AbstractPoolable obj = (AbstractPoolable) o;
52                 // todo check if configure can be called from AbstractObjectPool
53 // obj.configure(configuration);
54 obj.reset();
55                 obj.setObjectPool(this);
56             }
57         };
58         
59         evaluationContextPool_.configure(configuration);
60     }
61
62     public EvaluationContext newEvaluationContext()
63     {
64         return ( EvaluationContext ) evaluationContextPool_.lendObject();
65     }
66 }
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