ISSUE 84: Create an Event Processing Model for SCA

[Scott Vorthmann <scottv@tibco.com>]

http://www.osoa.org/jira/browse/ASSEMBLY-84

On Sep 9, 2008, at 1:47 AM, Mike Edwards wrote:

>
> Raiser:                              Mike Edwards
>
> Target:                              SCA Assembly Specification
>
> Description:
>
> SCA currently describes service interactions between clients and  
> providers.
>
> However, there is another form of application interaction which is  
> commonly used and
> which is complementary to the current service interaction modelled  
> by SCA.  This is
> Event Processing, where messages called Events are emitted by Event  
> Producers
> and which are processed asynchronously by zero to many Event  
> Consumers.
>
> In addition to the simple production and consumption of events,  
> applications organized
> in this way also involve the use of Publish and Subscribe  
> techniques, decoupling a set
> of event producers from a set of event consumers.
>
> Event processing becomes very useful when combined with service  
> oriented architecture.
> Service processing is required when dealing with requests that  
> require specific handling
> and where the client requires a definite response either in terms of  
> processing completed
> and/or in terms of data returned.  Event processing is useful when  
> looser coupling is
> required - events are produced without the expectation that any  
> specific processing will
> occur based on them.  However, by listening to one or more events an  
> event consumer
> can detect certain behaviours and react accordingly.
>
> SCA should be extended to encompass both services and event  
> processing.
>
> Proposal:
>
>
> None at this time
>
>
>
> Yours,  Mike.
>
> Strategist - Emerging Technologies, SCA & SDO.
> Co Chair OASIS SCA Assembly TC.
> IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
> Phone & FAX: +44-1962-818014    Mobile: +44-7802-467431
> Email:  mike_edwards@uk.ibm.com
>
>
>
>
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