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Oracle UTL_DBWS Package

Oracle Database Tips by Donald Burleson

Advanced Oracle Utilities: The Definitive Reference by Rampant TechPress is written by top Oracle database experts (Bert Scalzo, Donald Burleson, and Steve Callan).  The following is an excerpt from the book.

The UTL_DBWS package is for the rarefied developer; that is, someone who is very deep into Java Web services and using DII (Dynamic Invocation Interface). The DBWS in the package name represents database Web services, and what the package does is provide a wrapper on top of the Java DII. Instead of using Java-specific calls to static invocations, Oracle uses UTL_DBWS to provide a means of using a dynamic invocation interface.  Sounds pretty simple, right?


MOSC note 428775.1, "DBWS Callout Utilities User's Guide for RDBMS 10.1 or 10.2," takes the developer through the setup steps to install UTL_DBWS Callout Utilities. In general, one will need to have Java installed and configured in the database, have JPublisher installed, and have access to an OC4J instance on the computer, which can be obtained via the OC4J version of Application Server. In essence, the database is being turned into a Web service consumer.


Installing Java and checking UTL_DBWS status (around 20,000 SYS-owned Java objects) is documented quite well in Oracle's documentation and elsewhere on the Internet. Look for "How to Reload the JVM" on MOSC or start with note 472937.1, "Information On Installed Database Components and Schemas" and look under the first section.


Installing JPublisher comes from installing SQLJ.  If not installed, it can be obtained with the installation CD/download used to install Oracle in the first place. At the end, "jpub" should be found when entering this executable at the command line.


Next, get the appropriate Web services callout utility from Oracle.


Use J2SE 1.3.x or Oracle 9.2, and 1.4.x for releases 1 and 2 of 10g (and also works for 11g). By this point, these details probably pertain to the five or six people who use this package. There is not much in the way of documentation, so aside from OTN and MOSC, a specialized book such as Oracle Database Programming Using Java and Web Services (Elsevier Digital Press, 2006) would be in order.



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