web server - Borland Technical Publications
web server - Borland Technical Publications web server - Borland Technical Publications
MDBs and transactions MDBs and transactions You can set these properties with the DDEditor. From the Console, navigate the tree on the left until you find the module containing your MDBs. Right-click the module and select DDEditor. When the DDEditor appears, select the bean node in the Navigation Pane to open the editor's panels for that bean. Select the “Properties” tab from the Content pane, and Add properties. For information about using JMS within transactions, go to Chapter 23, “Using JMS.” This section deals exclusively with using MDBs in transactions. A common scenario for using the onMessage() method of MDBs involves transactions requiring two-phase commit (2PC). Such an MDB has the REQUIRED transaction attribute. The onMessage() method is written to access and possibly update an external resource. Completion of the container managed transaction for the MDB method must include receipt of the message that triggered the method, and any work performed against the external resource from within the method. To achieve this, the transaction must be coordinated by a 2PC transaction service, such as the OTS engine. Refer to EJBs and 2PC Transactions section in Chapter 19, “Transaction management” for more details on optimal ways to use the OTS engine with MDBs. Chapter 20: Message-Driven Beans and JMS 189
190 BES Developer’s Guide
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- Page 155 and 156: Setting Properties J2EE 1.3 Entity
- Page 157 and 158: Setting Properties Figure 16.2 Edit
- Page 159 and 160: Setting Properties Table 16.1 ejb.m
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- Page 163 and 164: Setting Properties Security Propert
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- Page 175 and 176: Generating primary keys from a cust
- Page 177 and 178: Implementing primary key generation
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- Page 197 and 198: Clustering of MDBs This is yet anot
- Page 199: Error Recovery Redelivered messages
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- Page 205 and 206: Disabling and Enabling a Deployed D
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- Page 219 and 220: Connecting to JDBC Resources from J
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- Page 223 and 224: Defining Connection Pool Properties
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