the eSCL Message Broker
- a software bus
Our Definition:
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Message Passing Architecture
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Publish/Subscribe Mechanism
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One-to-many (Multicast)
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Connectionless
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Guaranteed Delivery
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Notifications, Requests/Replies
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Request Handler Stacking
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Synchronous/Asynchronous Delivery
Software Bus User Benefits:
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Simple to use (Plug & Play)
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No concept of Client or Server, instead a
Listener or Request Handler
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No IDL, compiling, linking…
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Message is self documenting (XML)
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Message easy to parse, test, validate, archive…
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Loose coupling with other apps (none)
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Scales up
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Used for control messages (not high speed
data)
The Message Broker Layers
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Messaging (payload) is independent of protocols
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Enough information is carried to route messages
