A Design Pattern Dictionary

Section 

2

 - The Dictionary

Foil 

29

 - Startup Registration idiom

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    Page published 2003/12/11, updated 2009/8/2. Copyright © 2016 by Avner Ben. All rights reserved.

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Some population in a Singleton registry (e.g. Dynamic Pluggable Factory) represents the application default .

Challenge:

To make the default population register automatically.

Skill:
View Wirechart

The system shall have the capability to let the default object population be registered spontaneously...

    ASYNCH (from outside), MANY OPTION ASYNCH (from outside), MANY ABSTRACT

    Participants:

    registry:

    A Singleton. Registers Citizens, possibly by event type.

    Citizen:

    The declared contents of the register.

    Concrete Citizen:

    Registered at the registry as part of the definition of its own or a parallel type.

    Signature:

    (In modular languages:) Registration code follows the Concrete Citizen type definition. (In conventionally-linked languages:) Global Concrete Citizen objects register themselves (in their own constructor).

    Used by:

    Global registration mechanisms, e.g. Dynamic Pluggable Factory.

    Scope:

    Languages that support either modularity or global objects.