How to SET Informix (ifxjdbcx.jar) LOCALES in Pool Properties - by G Moykin

Hi everybody,
Some users complain about setting the DB and Client Locales in Connection Pool Properties, when IBM Informix JDBC Driver (Type 4 XA) ifxjdbcx.jar is used. The usual way to set them is: 
DB_LOCALE= â€¦ 
CLIENT_LOCALE= â€¦ 
But regardless of what is written, the Locales are NOT set. Does the Connection Pool transmit these properties correctly? Does the Driver set them? Both are true but with a very important specification: the right way to set them in the Connection Pool Properties field is: 
IfxDB_LOCALE= â€¦ 
IfxCLIENT_LOCALE= â€¦ 
The appearance of prefix â€˜Ifxâ€™ is the clue.
Most of setPropertyName Driver methods are standard such as:
user -> setUser; password -> setPassword; serverName -> setServerName
but in particular, IBM decided to give a name to set Locales Methods (w/o notify BEA) as: 
 public void setIfxDB_LOCALE(String string) { 
Properties.setProperty("DB_LOCALE", string); 
} 
public void setIfxCLIENT_LOCALE(String string) { 
Properties.setProperty("CLIENT_LOCALE", string); 
} 
Methods reside in (ifxjdbcx.jar) class com.informix.jdbcx.IfxCoreDataSource,
and the Driver class com.informix.jdbcx.IfxXADataSource extends IfxCoreDataSource.
According to a standard properties SET (such as user, password, databaseName, serverName etc.), BEA developers have written a brilliant class (in weblogic.jar) which retrieves the properties from the Connection Pool and invokes the corresponding Driver SET Methods:
weblogic.management.console.utils.JDBC.testConnection method determines whether the JDBC driver class is instance of javax.sql.XADataSource, and if it is, the method passes
the driver instance:
XADataSource xadatasource =(XADataSource)Class.forName(yourDriverClass).newInstance();
And the Connection Pool properties obtained from
weblogic.management.configuration.JDBCConnectionPoolMBean_Stub.getProperties
to the method
weblogic.jdbc.common.internal.DataSourceUtil.initProps(null, xadatasource, properties);
which via weblogic.jdbc.common.internal.DataSourceUtil.initProp method invokes the SETs methods of the driver.
DataSourceUtil.initProp method reads the corresponding â€˜set property nameâ€™ and search through a Driver method setPropertyname.
Do you get me?! If you have written: DB_LOCALE= â€¦ , the initProp method search for a Driver method called setDB_LOCALE.
Since IBM gave a name to set Locales Methods setIfxDB_LOCALE, you must set them in the Connection Pool Properties field as: 
IfxDB_LOCALE= â€¦ 
IfxCLIENT_LOCALE= â€¦ 
Best Regards: George Moykin, Sofia, Bulgaria
e-mail: [email protected] 
Some of my decisions and fixes:
- Eliminate the problem â€˜CHAR to Booleanâ€™ automatic generation of Entity EJB Field in BEA Workshop EJB Project, when â€˜new Entity bean from database tableâ€™ option is used.
- Eliminate the problem â€˜Scan of table tablename failed: java.lang.NullPointerExceptionâ€™, when the user tries to create an Entity EJB from a DBMS table (â€˜new Entity bean from database tableâ€™) using BEA Informix JDBC Driver (Type 4) wlinformix.jar.
- Eliminate the problem â€˜JDBC Pool Connection Leak/JTAConnection leakâ€™.

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