Hook: Define New Timer Type

Requirement

A new type of timer that is not provided by the Framework is needed.

Method of Adaptation

Add Feature

Level of Support

Open Ended

HotSpot

Time management

Participants

Timer, NewTimer

Changes

1. implementation NewTimer of Timer.
2. NewTimer implements all methods from Timer using a Time object as delegate.
3. NewTimer provides a constructor that takes a Time object as parameter, defining the delegate to be used.
4. define new methods and attributes as necessary.

Constraints

• This hook must only be invoked via the Select Timer Type hook.

Comments

• Although this cannot be enforced, new Timer classes should apply the Bridge design pattern and defer most of their functionality to the Time object. It is the Time object's responsibility to determine the representation of the current time and to increase the time on demand. It is the Timer's responsibility to define when and how the time is updated.