Where should we use Template Method - pattern?

design-patterns template-method-pattern
user366312 picture user366312 · Oct 12, 2009 · Viewed 13.4k times · Source

Can anyone let me know some example situations where Template Method - pattern should be used?

Give me some real-world use from your own experience.

(I have so far found it useful only for mapping data in the DA layer. Sorry!!!)

Answer

Pascal Thivent picture Pascal Thivent · Oct 12, 2009

A Template method pattern provides a skeleton for performing any sort of algorithm or an operation, and it allows the sub-classes to re-define part of the logic.

Pros: Natural fit for building frameworks, so that parent framework classes can make callbacks into methods implemented in child.

Examples:

  • java.util.AbstractList
  • Servlet's doGet and doPost methods
  • MDB's onMessage method
  • Struts Action class
  • Spring's data access classes

Cons: Restricts you to a single inheritance in Java.

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