At times we
get presented with technical requirements in OIC integration that will require the
use of custom developed Java classes (maybe from legacy systems, third party
collaborators, cryptography needs, etc.). As easy and straight-forward the
requirement sounds, its implementation may not be so, most of the times. The usually
suggested way is to compile the Java classes in OCI and create functions.
However, what if I tell you that there is another easier way to achieve the
requirement?
There is and
it assumes that there is an Oracle database in picture (preferably an ATP).
- 1. Enable Java in your Oracle database,
after which, you may have to bounce the database once.
- 2. Import your Java classes using the CREATE
JAVA statement. More details on this statement can be known here. Please note
that if a class references another class objects, then the class being
referenced has to be imported first before proceeding to import the other.
- 3. Once you have imported and successfully
compiled the necessary Java classes, you will have to wrap the Java classes
using PLSQL functions. Please take note that when you create wrappers, you will
have to mention the formal data type of its arguments – like java.lang.String
for a string type.
- 4. Utilize these wrappers by creating
another wrapper procedure/function – but this time, using the PLSQL datatypes.
These procedures and functions can be invoked from OIC integrations, indirectly
utilizing the custom Java classes.
Voila!
