AG VLSI Design and Architecture

SFB 501 - Project D1: Application System "Buildings"

PSiGene

Pattern Catalog

16.4 Pattern BinarySensorServer

Intent

Provide only read access for remote programs. EventMode ist also supported. (See SensuatorServer for details)

Motivation

Restrict the general SensuatorServer pattern by not allowing external processes to write to an attribute.

Applicability

Same as in SensuatorServer .

Structure

Same as in SensuatorServer .

Participants

All participants are inherited from SensuatorServer :

objects:

target (use)
The target object that should act as a Sensuator.

attributes:

name (use)
An attribute containing the Sensuators name.
attribute (use)
The attribute that should be accessed by extern components.

methods:

init (implement, preset)
Generated method to initialize the sensuator.

Collaborations

Same as in SensuatorServer .

Consequences

Same as in SensuatorServer .

Implementation

{init}
|aSet anArray |
self {name} notNil ifTrue:
[
aSet := Set new.
anArray := Array withSize: 6.

       anArray at: 1 put: self.
        anArray at: 2 put: #{attribute}.
        anArray at: 3 put: nil.
        anArray at: 4 put: #setEventMode.
        anArray at: 5 put: #resetEventMode.
        anArray at: 6 put: aSet.
        Scheduler simSched remoteAccessibleObjects at: (self {name} asSymbol) put: anArray.
    ]

Related Patterns

SensorServer , SensuatorServer

PEdit description

Pattern BinarySensorServer Category sockets

    ObjectType use target
    Attribute use name
    Attribute use attribute
    SingleMethod implement preset init
End