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Java > Open Source Codes > org > openejb > core > stateless > StatelessContext


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: StatelessContext.java 1096 2004-03-26 21:41:16Z dblevins $
44  */
45 package org.openejb.core.stateless;
46
47 import javax.xml.rpc.handler.MessageContext JavaDoc;
48
49 import org.openejb.RpcContainer;
50 import org.openejb.core.DeploymentInfo;
51 import org.openejb.core.Operations;
52 import org.openejb.core.ThreadContext;
53 import org.openejb.core.ivm.EjbObjectProxyHandler;
54
55 /**
56  * This class imposes restrictions on what stateless SessionBean methods can access which SessionContext
57  * methods. While the CoreContext handles restrictions related to container- vs. bean-managed
58  * transaction beans, this class manages restrictions related to the position of the bean
59  * in its life-cycle to the SessionContext operation being performed. Restrictions are specified
60  * in the EJB specification. The CoreContext actually fulfills the request, this class just
61  * applies restrictions on access.
62  */
63 public class StatelessContext
64 extends org.openejb.core.CoreContext implements javax.ejb.SessionContext JavaDoc{
65     public void checkBeanState(byte methodCategory) throws IllegalStateException JavaDoc{
66         /*
67         SECURITY_METHOD:
68         USER_TRANSACTION_METHOD:
69         ROLLBACK_METHOD:
70         EJBOBJECT_METHOD:
71         
72         The super class, CoreContext determines if Context.getUserTransaction( ) method
73         maybe called before invoking this.checkBeanState( ). Only "bean managed" transaction
74         beans may access this method.
75         
76         */
77         ThreadContext callContext = ThreadContext.getThreadContext();
78         DeploymentInfo di = callContext.getDeploymentInfo();
79         
80         switch(callContext.getCurrentOperation()){
81             case Operations.OP_SET_CONTEXT:
82                 /*
83                 Allowed Operations:
84                     getEJBHome
85                 Prohibited Operations:
86                     getCallerPrincipal
87                     getRollbackOnly,
88                     isCallerInRole
89                     setRollbackOnly
90                     getEJBObject
91                     getPrimaryKey
92                     getUserTransaction
93                 */
94                 if(methodCategory != EJBHOME_METHOD)
95                     throw new IllegalStateException JavaDoc("Invalid operation attempted");
96                 break;
97             case Operations.OP_CREATE:
98             case Operations.OP_REMOVE:
99                 /*
100                 Allowed Operations:
101                     getEJBHome
102                     getEJBObject
103                     getPrimaryKey
104                     getUserTransaction
105                 Prohibited Operations:
106                     getCallerPrincipal
107                     getRollbackOnly,
108                     isCallerInRole
109                     setRollbackOnly
110                 */
111                 if( methodCategory == EJBHOME_METHOD
112                    || methodCategory == EJBOBJECT_METHOD
113                    || methodCategory == USER_TRANSACTION_METHOD)
114                     break;
115                 else
116                     throw new IllegalStateException JavaDoc("Invalid operation attempted");
117             case Operations.OP_BUSINESS:
118                 /*
119                 Allowed Operations:
120                     getEJBHome
121                     getEJBObject
122                     getPrimaryKey
123                     getUserTransaction
124                     getCallerPrincipal
125                     getRollbackOnly,
126                     isCallerInRole
127                     setRollbackOnly
128                 Prohibited Operations:
129                 */
130                 break;
131         }
132         
133     }
134     
135     protected EjbObjectProxyHandler newEjbObjectHandler(RpcContainer container, Object JavaDoc pk, Object JavaDoc depID){
136         return new StatelessEjbObjectHandler(container, pk, depID);
137     }
138     
139     public MessageContext JavaDoc getMessageContext() {
140         return null; //TODO: implement this
141 }
142     
143 }
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