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Java > Open Source Codes > org > openejb > core > stateful > StatefulEjbHomeHandler


1 /**
2  * Redistribution and use of this software and associated documentation
3  * ("Software"), with or without modification, are permitted provided
4  * that the following conditions are met:
5  *
6  * 1. Redistributions of source code must retain copyright
7  * statements and notices. Redistributions must also contain a
8  * copy of this document.
9  *
10  * 2. Redistributions in binary form must reproduce the
11  * above copyright notice, this list of conditions and the
12  * following disclaimer in the documentation and/or other
13  * materials provided with the distribution.
14  *
15  * 3. The name "Exolab" must not be used to endorse or promote
16  * products derived from this Software without prior written
17  * permission of Exoffice Technologies. For written permission,
18  * please contact info@exolab.org.
19  *
20  * 4. Products derived from this Software may not be called "Exolab"
21  * nor may "Exolab" appear in their names without prior written
22  * permission of Exoffice Technologies. Exolab is a registered
23  * trademark of Exoffice Technologies.
24  *
25  * 5. Due credit should be given to the Exolab Project
26  * (http://www.exolab.org/).
27  *
28  * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39  * OF THE POSSIBILITY OF SUCH DAMAGE.
40  *
41  * Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
42  *
43  * $Id: StatefulEjbHomeHandler.java 1096 2004-03-26 21:41:16Z dblevins $
44  */
45 package org.openejb.core.stateful;
46
47
48 import java.lang.reflect.Method JavaDoc;
49 import java.rmi.RemoteException JavaDoc;
50
51 import org.openejb.ProxyInfo;
52 import org.openejb.RpcContainer;
53 import org.openejb.core.ivm.EjbHomeProxyHandler;
54 import org.openejb.core.ivm.EjbObjectProxyHandler;
55 import org.openejb.util.proxy.ProxyManager;
56
57 /**
58  * This InvocationHandler and its proxy are serializable and can be used by
59  * HomeHandle, Handle, and MetaData to persist and revive handles. It maintains
60  * its original client identity which allows the container to be more discerning about
61  * allowing the revieed proxy to be used. See StatefulContaer manager for more details.
62  *
63  * @author <a HREF="mailto:david.blevins@visi.com">David Blevins</a>
64  * @author <a HREF="mailto:Richard@Monson-Haefel.com">Richard Monson-Haefel</a>
65  */
66 public class StatefulEjbHomeHandler extends EjbHomeProxyHandler {
67     
68     public StatefulEjbHomeHandler(RpcContainer container, Object JavaDoc pk, Object JavaDoc depID){
69         super(container, pk, depID);
70     }
71     
72     protected Object JavaDoc createProxy(ProxyInfo proxyInfo){
73         Object JavaDoc proxy = super.createProxy(proxyInfo);
74         EjbObjectProxyHandler handler = (EjbObjectProxyHandler)ProxyManager.getInvocationHandler(proxy);
75         
76         // register the handle with the BaseEjbProxyHandler.registerHandler
77 registerHandler(handler.getRegistryId(),handler);
78         
79         return proxy;
80     
81     }
82     
83     
84     /**
85      *
86      * EJB 1.1 Specification, Section 5.5 Session object identity
87      * Since all session objects hide their identity, there is no need to provide a finder for them. The home
88      * interface of a session bean must not define any finder methods.
89      *
90      * @param method
91      * @param args
92      * @param proxy
93      * @return Returns an new EJBObject proxy and handler
94      * @exception Throwable
95      */
96     protected Object JavaDoc findX(Method JavaDoc method, Object JavaDoc[] args, Object JavaDoc proxy) throws Throwable JavaDoc {
97         throw new UnsupportedOperationException JavaDoc("Stateful beans may not have find methods");
98     }
99     
100     /**
101      * ------------------------------------
102      * 5.3.2 Removing a session object
103      * A client may remove a session object using the remove() method on the javax.ejb.EJBObject
104      * interface, or the remove(Handle handle) method of the javax.ejb.EJBHome interface.
105      *
106      * Because session objects do not have primary keys that are accessible to clients, invoking the
107      * javax.ejb.EJBHome.remove(Object primaryKey) method on a session results in the
108      * javax.ejb.RemoveException.
109      *
110      * ------------------------------------
111      * 5.5 Session object identity
112      *
113      * Session objects are intended to be private resources used only by the
114      * client that created them. For this reason, session objects, from the
115      * client’s perspective, appear anonymous. In contrast to entity objects,
116      * which expose their identity as a primary key, session objects hide their
117      * identity. As a result, the EJBObject.getPrimaryKey() and
118      * EJBHome.remove(Object primaryKey) methods result in a java.rmi.RemoteException
119      * if called on a session bean. If the EJBMetaData.getPrimaryKeyClass()
120      * method is invoked on a EJBMetaData object for a Session bean, the method throws
121      * the java.lang.RuntimeException.
122      * ------------------------------------
123      *
124      * Sections 5.3.2 and 5.5 conflict. 5.3.2 says to throw javax.ejb.RemoveException, 5.5 says to
125      * throw java.rmi.RemoteException.
126      *
127      * For now, we are going with java.rmi.RemoteException.
128      */
129     protected Object JavaDoc removeByPrimaryKey(Method JavaDoc method, Object JavaDoc[] args, Object JavaDoc proxy) throws Throwable JavaDoc {
130         throw new RemoteException JavaDoc("Session objects are private resources and do not have primary keys");
131     }
132
133     
134     protected EjbObjectProxyHandler newEjbObjectHandler(RpcContainer container, Object JavaDoc pk, Object JavaDoc depID) {
135         return new StatefulEjbObjectHandler(container, pk, depID);
136     }
137     
138 }
139
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