dependency injection

Trade study with multiple targets

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

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SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

A 2nd injection target I_B

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

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MagicDraw/Cameo: table

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

Instead of the client specifying which service it will use, the injector tells the client what service to use. The "injection" refers to the passing of a dependency (a service) into the object (a client) that would use it.

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In the typical "using" relationship the receiving object is called a client and the passed (that is, "injected") object is called a service. The code that passes the service to the client can be many kinds of things and is called the injector.

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In software engineering, dependency injection is a technique in which an object receives other objects that it depends on. These other objects are called dependencies.

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MultiClient with two injectable service targets

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

Section

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

Trade(-off) study for Client with A1 and A2 instances (dependency injection)

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

Section

Slide kind

SysML Block Definition Diagram (BDD)

SysML Internal Block Diagram (IBD)

Executable instance tables for Client with A1 and A2 instances (dependency injection)

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

Section

Slide kind

MagicDraw/Cameo: table

Executable instance tables for A1 and A2 (concrete implementations of I_A)

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

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MagicDraw/Cameo: table

Parametric diagrams with BindingConnectors for concrete implementation blocks A1 and A2

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Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

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SysML Parametric Diagram

Variations on concrete implementations of I_A and the constraints with computations they carry

Gallery

Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

Section

Slide kind

SysML Block Definition Diagram (BDD)

The problem statement: A Client subscribes to an output value property but does not know what computes it or how

Gallery

Tutorial

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

Section

Slide kind

SysML Block Definition Diagram (BDD)

SysML Parametric Diagram

TRAIL: HOWTO simulate Dependency Injection of SysML Parametric calculations

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The problem statement: A Client subscribes to an output value property but does not know what computes it or how

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Contexts and Dependency Injection (CDI) zone

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Based on decades of experience with Design Patterns and Enterprise Java web applications - and other types of Java applications too - Contexts and Dependency Injection (CDI) is a thing of architectural beauty and wonder!

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