February 2004
Intermediate to advanced
848 pages
27h 25m
English
Content preview from WebLogic: The Definitive GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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WebLogic’s Wrapper Drivers
In this section, we examine how you can use WebLogic’s wrapper drivers to access preconfigured connection pools. Even though a data source is the recommended way for accessing a connection pool, you may need to use wrapper drivers for existing or legacy applications that are based on the JDBC 1.x API. WebLogic supports three kinds of wrapper drivers:
- WebLogic RMI Driver
Client-side applications can use the RMI Driver to access server-side connection pools.
- WebLogic Pool Driver
Server-side applications can use the Pool Driver to access the connection pools directly.
- WebLogic JTS Driver
The JTS Driver is identical to the Pool Driver, except that the database connections also can participate in distributed transactions.
Each driver provides vendor-neutral access to connection pools already configured in WebLogic. The J2EE standard recommends that you use a data source to access the pool.
The RMI Driver
WebLogic’s RMI Driver is a Type 3 JDBC driver that enables client-side applications to access connection pools configured on WebLogic Server. The RMI Driver returns JDBC connections through the data source configured for the pool. The connection pool is configured as usual using a two-tier JDBC driver. As its name suggests, the RMI Driver provides RMI access to a server-side JDBC pool.
Let’s look at how a client application obtains a JDBC connection from a connection pool:
java.sql.Driver wlDriver = (java.sql.Driver) Class.forName("weblogic.jdbc.rmi.Driver").newInstance( ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.