Chapter 3. General Application Design

In this chapter, we will focus on the following recipes related to advanced application development:

• Improving concurrency by using a connection concentrator

• Using trusted contexts for improved security

• Using trusted connections in JDBC

• Using trusted connections in PHP

• Securing data using DB2 encryption

• Improving concurrency by using enhanced optimistic locking

• Working with user-defined types (UDT)

• Working with structured types

Introduction

In this chapter, we will look at some advanced techniques that can be used to design efficient applications. We will see how we can improve security in 3-tier architecture applications. We will also look at the various methods of data encryption provided by DB2. Thereafter, we will see how we can extend the data type support provided by DB2 and apply them in our application design.