Architecture overview Visual programming for development of Distributed Event-Based systems

Architecture overviewVisual programming for development of Distributed

Event-Based systems

Architecture overviewVisual programming for development of Distributed

Event-Based systems

Carlos Neves Júnior [email protected]

Hans Kurt Edmund Liesenberg [email protected] de Computação – UNICAMP

(July/2013)

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Agenda

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Communication based on Notification systems: Publish/Subscribe model

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Event-Based systems: Architecture

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Examples

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Related Work

SCXML (2013) – State Chart XML

– Reactive Browser

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Notes

Simple to design using visual programming and notations

– Model Driven Architecture

Hybrid approach when additional functionality is needed

– Visual Programming and Traditional Programming language (Java)

IDE implemented in Java/JEE

– Support for Components covered in the current prototype

– Event system (Brokers) to be addressed in next releases

System runtime configuration requires manual intervention

More experiments with Distributed Event-Based system

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Event-Based systems: Components

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Introducing the building blocks Components

Producers

Consumers

Event Processing Agents

Event Processing Network

Scopes

Channels and Notification systems/Delivery of events

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Producer

Component that generates and produces events (output)

publish

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EPAEvent Processing Agent

Component that process events (rules) – produce and consume events

publishnotify

(subscribe,

unsubscribe)

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Consumer

Component that consume and react to events (input)

notify

(subscribe,

unsubscribe)

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Distributed view - channelsEPN – Event Processing Network

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Distributed view - scopes Group of components

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Distributed View #2 Scopes – Graph of scopes

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Visual programming From EPN to DEBSxml

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Visual programming From Statecharts to SCXML

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Rules & Transitions in StatechartsTransitions (Statecharts)

Source (State(s))

Target (State(s))

Trigger – Event + guard (condition)

Action

Raise(event), Send(event), invoke(), assign()

Rule (NEW - Introduced in this Statecharts variant)

Trigger – Event + guard (condition)

Action

Special rules: onentry, onexit

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RUNTIME – distributed components Messaging Service (JMS) and custom DEBS services for EPN handling

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Thank you!!!Thank you!!!

Carlos Neves Júnior [email protected]

Hans Kurt Edmund Liesenberg [email protected]