BEA WebLogic Server 7 Manuel D’Utilisation

BEA WebLogic Server 7.0 Upgrade Guide

for the WebLogic Server EJB container.  This file must conform to the 
WebLogic Server 5.1 DTD or the WebLogic Server 7.0 DTD.

„

In order to specify the mappings to the database, container-managed persistence 
entity beans require a CMP deployment descriptor that conforms to either the 
WebLogic Server 5.1 CMP DTD, the WebLogic Server 7.0 EJB 1.1 DTD, or the 
WebLogic Server 7.0 EJB 2.0 DTD.

„

In WebLogic Server 7.0 the 

max-beans-in-cache

 parameter controls the 

maximum number of beans in the cache for Database concurrency. In earlier 
WebLogic Server versions, 

max-beans-in-cache

 was ignored; the size of the 

cache was unlimited. You may need to increase the size of this parameter.

„

Use 

TxDataSource.

EJBs should always get their database connections from a 

TxDataSource

. This 

allows the EJB container's transaction management to interface with the JDBC 
connection, and it also supports XA transactions.

The WebLogic Server 7.0 CMP Deployment Descriptor supports 

TxDataSource

s and should be used instead of the WebLogic Server 5.1 CMP 

Deployment Descriptor which only specifies a connection pool.

„

Use a fast compiler: 

ejbc.

The WebLogic Server EJB compiler (

weblogic.ejbc

) generates Java code that 

is then compiled by the Java compiler. By default, WebLogic Server uses the 

javac

 compiler included with the bundled JDK. The EJB compiler runs much 

faster when a faster Java compiler is used. Use the 

-compiler

 option to specify 

an alternate compiler as in the following example:

java weblogic.ejbc -compiler sj pre_AccountEJB.jar 
AccountEJB.jar

„

Correct errors before deploying the EJB on WebLogic Server 7.0.

The WebLogic Server 7.0 EJB compiler (

ejbc

) includes additional verification 

that was missing from earlier WebLogic Server releases. It is possible that an 
EJB deployed in a previous WebLogic Server version without error, but 
WebLogic Server 7.0 finds and complains about the error. These errors must be 
corrected before the EJB is deployed in WebLogic Server 7.0.