Interfaces usage

[Dragos DOBRE]

Hello,

 

I have tried to understand the use of Interfaces on standard ports and I even use them to provide or require operations (as in Interfaces we define the operations). What I didn’t understand is why in an Sequence Diagram it is not possible to use these operations in order to describe the system’s behavior (communication between ports is made by calling the Interfaces operations). I’m using Artisan Studio Uno and  when I want to call an operation from other block (described by the Interface), within a sequence diagram, the operation must be provided by the block (the operations from the Interface are not seen by the block) and so I have to redefine the same operation defined in the Interface.

 

Can someone explain the use of Interfaces (not only to show which block connects to which, but also the further use for this connection and the declared operations).

 

Regards,

 

Dragos DOBRE

Doctorant - Nancy Université - Université Henri Poincaré

Centre de Recherche en Automatique de Nancy - CRAN

Faculté des Sciences, BP 70239

54506 Vandoeuvre-lès-Nancy

Tél: +33 (0) 3.83.68.40.00 P81450

Fax: +33 (0) 3.83.68.44.59

 

 

 

 

[Daniel Wadler]

if i understand correctly, the port cannot "provide" a service, rather it defines a point of interaction with the block.
the block must provide the service.
the block should inheret the same interface that is "provided" by the port, and should either include an implementation of the service, or an allocation to a sub-block.

hope this helps.
- daniel

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From: dobre....@gmail.com
To: sysml...@googlegroups.com
Subject: [SysML Forum] Interfaces usage
Date: Mon, 9 Nov 2009 15:55:34 +0100

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