TxNever


1   /**
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3    * ("Software"), with or without modification, are permitted provided
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8    *    copy of this document.
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11   *    above copyright notice, this list of conditions and the
12   *    following disclaimer in the documentation and/or other
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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
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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
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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: TxNever.java 1912 2005-06-16 22:29:56Z jlaskowski $
44   */
45  package org.openejb.core.transaction;
46  
47  import javax.ejb.EnterpriseBean  ;
48  
49  import org.openejb.ApplicationException;
50  
51  /**
52   * 17.6.2.6 Never
53   * 
54   * The Container invokes an enterprise Bean method whose transaction attribute
55   * is set to Never without a transaction context defined by the EJB spec. 
56   * 
57   * The client is required to call without a transaction context.
58   * 
59   * � If the client calls with a transaction context, the Container throws the 
60   *   java.rmi.RemoteException exception if the client is a remote client, or 
61   *   the javax.ejb.EJBException if the client is a local client.
62   * � If the client calls without a transaction context, the Container performs
63   *   the same steps as described in the NotSupported case.
64   *
65   * @author <a HREF="mailto=david.blevins@visi.com">David Blevins</a>
66   * @version $Revision: 1912 $ $Date: 2005-06-16 15:29:56 -0700 (Thu, 16 Jun 2005) $
67   */
68  public class TxNever extends TransactionPolicy {
69      
70      public TxNever(TransactionContainer container){
71          this();
72          this.container = container;
73      }
74  
75      public TxNever(){
76          policyType = Never;
77      }
78      
79      public String   policyToString() {
80          return "TX_Never: ";
81      }
82  
83      public void beforeInvoke(EnterpriseBean   instance, TransactionContext context) throws org.openejb.SystemException, org.openejb.ApplicationException{
84          
85          try {
86          
87              if ( getTxMngr().getTransaction() != null ){
88                  // TODO:3: Localize the message; add to Messages.java
89                  throw new ApplicationException(new java.rmi.RemoteException  ("Transactions not supported"));
90              }
91          
92          } catch ( javax.transaction.SystemException   se ) {
93              logger.error("Exception during getTransaction()", se);
94              throw new org.openejb.SystemException(se);
95          }
96      }
97  
98      public void afterInvoke(EnterpriseBean   instance, TransactionContext context) throws org.openejb.ApplicationException, org.openejb.SystemException{
99          // Nothing to do
100     }
101 
102     
103     /**
104      * <B>Container's action</B>
105      * 
106      * <P>
107      * Re-throw AppException
108      * </P>
109      * 
110      * <B>Client's view</B>
111      * 
112      * <P>
113      * Receives AppException.
114      * 
115      * If the client executes in a transaction, the client's transaction is not 
116      * marked for rollback, and client can continue its work.
117      * </P>
118      */
119     public void handleApplicationException( Throwable   appException, TransactionContext context) throws ApplicationException{
120         // Re-throw AppException
121         throw new ApplicationException( appException );
122     }
123     
124     /**
125      * A system exception is any exception that is not an Application Exception.
126      * 
127      * <B>Container's action</B>
128      * 
129      * <P>
130      * <OL>
131      * <LI>
132      * Log the exception or error so that the System Administrator is alerted of
133      * the problem.
134      * </LI>
135      * <LI>
136      * Discard instance.  The Container must not invoke any business methods or
137      * container callbacks on the instance.
138      * </LI>
139      * <LI>
140      * Throw RemoteException to remote client;
141      * throw EJBException to local client.
142      * </LI>
143      * </OL>
144      * 
145      * </P>
146      * 
147      * <B>Client's view</B>
148      * 
149      * <P>
150      * Receives RemoteException or EJBException.
151      * 
152      * If the client executes in a transaction, the client's transaction may or
153      * may not be marked for rollback.
154      * </P>
155      */
156     public void handleSystemException( Throwable   sysException, EnterpriseBean   instance, TransactionContext context) throws org.openejb.ApplicationException, org.openejb.SystemException{
157         /* [1] Log the system exception or error *********/
158         logSystemException( sysException );
159 
160         /* [2] Discard instance. *************************/
161         discardBeanInstance( instance, context.callContext);
162 
163         /* [3] Throw RemoteException to client ***********/
164         throwExceptionToServer( sysException );
165     }
166 
167 }
168 
169
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