Communicator e3000 MPE/iX Release 6.5 (Non-Platform Software Release C.65.00 (30216-90291)

148 Chapter5

Internet and Interoperability

HP Driver for JDBC

Shu-Feng Wei

Commercial Systems Division

Java Database Connectivity (JDBC) is a Java API that enables development of Java

applications and applets with a wide range of relational databases. It consists of a set of

classes and interfaces written in Java. JDBC allows developers to write database

applications using a standard, pure Java API.

A typical JDBC Java application consists of a Java application or applet, the JDBC Driver

Manager, a vendor speciﬁc JDBC driver, and a database. The JDBC Driver Manager is

provided with the Java SDK and its primary function is to load and register the

vendor-speciﬁc JDBC driver with the Java applications and then get out of the way. The

following diagram shows the various components of a client-server JDBC application.

Figure 5-1. JDBC Client-Server Application

The HP Driver for JDBC is a vendor speciﬁc JDBC Driver that allows Java applications to

connect to ALLBASE/SQL or IMAGE/SQL databases on MPE/iX or ALLBASE/SQL on

HP-UX. The HP Driver for JDBC is a Type 3 (Network-Protocol) driver, meaning the

driver translates the JDBC API into a DBMS-independent protocol on the client-side, and

then translates to the ALLBASE/SQL protocol on the server. The driver components on the

client-side are written in 100% Pure Java, which provides the complete compatibility with

all Java Virtual Machines on all platforms.

Java Application

JDBC Driver Manager

HP JDBC Server

ALLBASE/SQL or

IMAGE/SQL Database

Network

HP Driver for JDBC