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Java > Open Source Codes > org > openejb > client > StatefulEJBObjectHandler


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 "OpenEJB" must not be used to endorse or promote
16  * products derived from this Software without prior written
17  * permission of The OpenEJB Group. For written permission,
18  * please contact dev@openejb.org.
19  *
20  * 4. Products derived from this Software may not be called "OpenEJB"
21  * nor may "OpenEJB" appear in their names without prior written
22  * permission of The OpenEJB Group. OpenEJB is a registered
23  * trademark of The OpenEJB Group.
24  *
25  * 5. Due credit should be given to the OpenEJB Project
26  * (http://www.openejb.org/).
27  *
28  * THIS SOFTWARE IS PROVIDED BY THE OPENEJB GROUP 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  * THE OPENEJB GROUP 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 2001 (C) The OpenEJB Group. All Rights Reserved.
42  *
43  * $Id: StatefulEJBObjectHandler.java 1921 2005-06-19 22:40:34Z jlaskowski $
44  */
45 package org.openejb.client;
46
47 import java.lang.reflect.Method JavaDoc;
48 import java.rmi.RemoteException JavaDoc;
49
50 /**
51  *
52  * @author <a HREF="mailto:david.blevins@visi.com">David Blevins</a>
53  * @since 11/25/2001
54  */
55 public class StatefulEJBObjectHandler extends EJBObjectHandler {
56
57     public StatefulEJBObjectHandler() {
58     }
59
60     public StatefulEJBObjectHandler(EJBMetaDataImpl ejb, ServerMetaData server, ClientMetaData client){
61         super(ejb, server, client);
62     }
63     
64     public StatefulEJBObjectHandler(EJBMetaDataImpl ejb, ServerMetaData server, ClientMetaData client, Object JavaDoc primaryKey){
65         super(ejb, server, client, primaryKey);
66         registerHandler( primaryKey, this );
67     }
68     
69     public Object JavaDoc getRegistryId() {
70         return primaryKey;
71     }
72
73
74     /**
75      * <B>5.8.3 getPrimaryKey()</B>
76      * <P>
77      * The object identifier of a session object is, in general, opaque
78      * to the client. The result of getPrimaryKey() on a session EJBObject
79      * reference results in java.rmi.RemoteException.
80      * </P>
81      *
82      * @param method
83      * @param args
84      * @param proxy
85      * @return Object
86      * @exception Throwable
87      */
88     protected Object JavaDoc getPrimaryKey(Method JavaDoc method, Object JavaDoc[] args, Object JavaDoc proxy) throws Throwable JavaDoc{
89         throw new RemoteException JavaDoc("Session objects are private resources and do not have primary keys");
90     }
91
92     /**
93      * <B><P>5.8.2 Stateless session beans</P></B>
94      * <P>
95      * All session objects of the same stateless session bean within
96      * the same home have the same object identity, which is assigned
97      * by the container. If a stateless session bean is deployed
98      * multiple times (each deployment results in the creation of a
99      * distinct home), session objects from different homes will have a
100      * different identity.
101      * </P>
102      * <P>
103      * The isIdentical(EJBObject otherEJBObject) method always returns
104      * true when used to compare object references of two session
105      * objects of the same stateless session bean. The following example
106      * illustrates the use of the isIdentical method for a stateless
107      * session object.
108      * </P>
109      * <PRE>
110      * FooHome fooHome = ...; // obtain home of a stateless session bean
111      * Foo foo1 = fooHome.create();
112      * Foo foo2 = fooHome.create();
113      * if (foo1.isIdentical(foo1)) {// this test returns true
114      * ...
115      * }
116      * if (foo1.isIdentical(foo2)) {// this test returns true
117      * ...
118      * }
119      * </PRE>
120      *
121      * @param method
122      * @param args
123      * @param proxy
124      * @return Object
125      * @exception Throwable
126      */
127     protected Object JavaDoc isIdentical(Method JavaDoc method, Object JavaDoc[] args, Object JavaDoc proxy) throws Throwable JavaDoc{
128         if ( args[0] == null ) return Boolean.FALSE;
129
130         EJBObjectProxy ejbObject = (EJBObjectProxy)args[0];
131         EJBObjectHandler that = ejbObject.getEJBObjectHandler();
132
133         return new Boolean JavaDoc(this.primaryKey.equals(that.primaryKey));
134     }
135
136     protected Object JavaDoc remove(Method JavaDoc method, Object JavaDoc[] args, Object JavaDoc proxy) throws Throwable JavaDoc{
137
138         EJBRequest req = new EJBRequest( EJB_OBJECT_REMOVE );
139         req.setClientIdentity( client.getClientIdentity() );
140         req.setDeploymentCode( ejb.deploymentCode );
141         req.setDeploymentId( ejb.deploymentID );
142         req.setMethodInstance( method );
143         req.setMethodParameters( args );
144         req.setPrimaryKey( primaryKey );
145         
146         EJBResponse res = request( req );
147   
148         if ( EJB_ERROR == res.getResponseCode() ) {
149             throw (Throwable JavaDoc)res.getResult();
150         }
151         
152         invalidateAllHandlers( this.getRegistryId() );
153         this.invalidateReference();
154         return null;
155     }
156
157 }
158
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