4
Methods: Using C/C++ and Java

This chapter describes how to use C, C++, and Java to implement the methods of a data cartridge. Methods are procedures and functions that define the operations permitted on data defined using the data cartridge.

This chapter focuses on issues related to developing and debugging external procedures, including:

• External Procedures

• Using Shared Libraries

• Registering an External Procedure

• How PL/SQL Calls an External Procedure

• Configuration Files for External Procedures

• OCIExtProcGetEnv

• Doing Callbacks

• OCI Access Functions for External Procedures

• Common Potential Errors

• Debugging External Procedures

• Guidelines for Using External Procedures with Data Cartridges

• Java Methods