4.2 Using Oracle Net Stack Communication for Java Applications

The Oracle Java Database Connectivity (JDBC) Drivers provide Java applications access to an Oracle database. Oracle offers two JDBC drivers.

• JDBC OCI Driver is a type 2 JDBC driver which is used by client/server Java applications. The JDBC OCI driver uses a communication stack similar to a standard client/server communication stack. The JDBC OCI driver converts JDBC invocations to calls to OCI which are then sent over Oracle Net to the Oracle database server.

• JDBC Thin Driver is a type 4 driver which is used by Java applets. The JDBC Thin Driver establishes a direct connection to the Oracle database server over Java sockets. The JDBC Thin driver uses a Java implementation of the Oracle Net foundation layer called JavaNet and a Java implementation of TTC called JavaTTC to access the database.

The following figure shows the stack communication layers used by JDBC drivers.

Figure 4-3 Layers Used for Java-Client Applications

Description of "Figure 4-3 Layers Used for Java-Client Applications"