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Subject: Re: [soa-rm] Types of Services (RE: [soa-rm] Definition of "Service Consumer")
A
I wonder if the roles a service can play - or, perhaps one can say, the------------------------------------------------------------------------------------------
general types of services that can exist - have any bearing on our RM at
all, in an indirect way.
Put in simple terms, one may say that there are - in general - 3
overarching "types" of services. These correspond to 3 of the layers of
the general "integration stack" (data, application, and process):
(1) Data-Oriented Service: Primary role is to accept and process data,
or provide data based upon a request.
Two general types:
(a) Data Processor*: Accepts as input a set of data, processes that
data, and (optionally) sends a response. The response may simply be an
acknowledgement, or another set of data to be processed by the service
requester**.
Ex: Simple form acceptance service, such as a loan application form
service acting on behalf of multiple banks (routes to proper bank and
sends back acknowledgement to form submitter)
(b) Data Provider: Provides streaming data, or a set of data upon
request.
Ex's: RSS news feed (streaming data), stock quote (set of data upon
request - given stock ticker symbol)
*need better term - using this for illustration purposes only
**using term "requester" for now since we have not established our
perferred term
(2) Application-Oriented Service (aka "Function-Oriented Service"):
Primary role is to accept a command and carry out processing based on
that command, in a singular fashion (i.e. does not invoke other
services).
Ex's: Inventory verification service (accepts item #, responds with
whether or not it is in inventory), shipment cost calculation service
(3) Process-Oriented Service: Similar to Application-Oriented Service,
but invokes other services in carrying out its processing (i.e. it
embodies the definition of an overarching process).
Ex: Order processing service (checks customer credit, checks inventory,
does shipment cost calculation, etc.)
Thoughts?
Joe
Joseph Chiusano
Booz Allen Hamilton
Visit us online@ http://www.boozallen.com
-----Original Message-----
From: Christopher Bashioum [mailto:cbashioum@mitre.org]
Sent: Thursday, April 07, 2005 12:49 PM
To: soa-rm@lists.oasis-open.org
Subject: RE: [soa-rm] Definition of "Service Consumer"
When we talk about service consumer vs. provider in this
sense, I think we need to separate the "static" entity from
the dynamic role that said entity plays. A given entity can
be both service provider (in which case it publishes it's
service description) and service consumer (in which case it
binds to another service provider in order to accomplish its
own service).
So...to re-word your statement a little: An entity that binds
with a service is playing the role of service consumer.
-----Original Message-----
From: Vikas Deolaliker [mailto:vikas@sonoasystems.com]
Sent: Thursday, April 07, 2005 12:21 PM
To: 'Frank McCabe'; soa-rm@lists.oasis-open.org
Subject: RE: [soa-rm] Definition of "Service Consumer"
Using the publish/find/bind framework of SOA...
The entity that publishes is certainly not the consumer. The
entity that
finds may or may not be the consumer but the entity that
binds is certainly
the consumer.
So an entity that "binds" with a service would be the closest
to a service
consumer.
Vikas
-----Original Message-----
From: Frank McCabe [mailto:frank.mccabe@us.fujitsu.com]
Sent: Thursday, April 07, 2005 9:00 AM
To: soa-rm@lists.oasis-open.org
Subject: Re: [soa-rm] Definition of "Service Consumer"
There is a distinction between the software *entity*
(agent/component/J2EE bean/.../) that interacts with a
service in order
to achieve some goal, and the person or persons for whom that
interaction is taking place.
The reason that this distinction is important is similar to the
distinction between a service interface and the service itself:
accessing your bank account from an ATM or on-line will use different
interfaces but ultimately all use the same service.
Here is an example of why its important: the appropriate
business logic
to apply to a service request will depend on many factors:
the means by
which the request was delivered, the request itself and the
person (or
persons) for whom the request was made. This last aspect is
completely
independent of mode of requesting and is purely business/application
specific.
Incidentally, the above definition: "an agent that interacts with a
service in order to achieve a goal" seems to be a reasonable
definition
of a service requester.
On Apr 7, 2005, at 7:23 AM, Gregory A. Kohring wrote:
Matthew,which captures
OK, here a fewer other choices which might be deemed more
"respectful"...
Service Consumer:
1) End-user of a service.
2) An agent which, acting on behalf of its owner, uses a service.
3) An entity which utilizes a service
4) An entity which consumes the product or information produced by a
service.
Note all of these definitions depend upon the definition of the
term "service". Have we agreed on this already? Perhaps we should
start there first...
-- Greg
Matthew MacKenzie wrote:
I think services deserve respect, lets try not to exploit them :-)
Gregory A. Kohring wrote:
Thomas,
Perhaps one should use a somewhat broader definition
"Software thatthe human user as well:
Service Consumer: An entity which exploits a service.
-- Greg
Thomas Erl wrote:
Now that we've decided on the term "service consumer" it may be
useful to formally define it. The term "consumer" is used by the
WS-I Basic Profile wherein it is simply defined as
======================================================================invokes an instance."
Thomas
--
G.A. Kohring======================================================================
C&C Research Laboratories, NEC Europe Ltd.
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