JDBC(JNDI):Connection dinamically managed

Question

Hi all,
I'm using
1) Crystal Reports 2008 for the reports' design,
2) Java Reporting Component (version 18.8.4.1094) for the integration in java environment,
3) JBoss (version 4.2.3) as Application Server
4) Oracle 11 as DBMS
in a web application.
When I create a report using JDBC (JNDI) and specify as the "Connection Name (optional)" the following string "java:jdbc/name_data_source",
How is managed the connection of the report and any sottoreports? In other words are the connections dynamically managed by the container web or ejb?
Thank you very much.

Answer 1

Hi, Andrea,
I'm gonna' make a few guesses here:
2) Java Reporting Component (version 18.8.4.1094)
I think you mean Crystal Reports for Java (CRJ) 2.8 version 12.2.209.1094. Neither the JRC (the name for the 1.x series) nor the CRJ (the 2.x series) has any version number in the 18.x range.
sottoreports
I think that means "subreports."
are the connections dynamically managed by the container web or ejb?
There are two ways the connections can be managed. If you've created a JNDI connection (a named connection), then you can base a report off of it, then at a later date change where the JNDI connection itself points to and the report should still work correctly, as long as the new target database shares the same schema as the original.
The other way you can manage the connection is to use code to change the database connection information inside the report itself. In this way, you could change it from one JNDI connection to another or even to another type of connection altogether. Again, however, the schemas between the old and the new connections must match.
Regards,
Bryan