Requirements for Management of Web Services

["KUMAR,PANKAJ (HP-Cupertino,ex1)" <pankaj_kumar@hp.com>]

Hi WSDM-TC Members,

As indicated in my previous mail, the writeup on 
for "Management of Web Services" requirements is attached in this mail.

Heather, Winston,

Please add this one also to the TC agenda.
 <<MOWS-Req.txt>> 
Best Regards,
Pankaj Kumar
Web Services Management Organization,
HP OpenView, HP.
Tel: 1-408-447-4571
Requirements -- Management Of Web Services
==========================================

This writeup explains the need to have a standard for Management Of
Web Services, refereed to as MOWS, and lists basic requirements that 
should be met by such a standrd. 

Ref: "Requirements -- management Using Web Services"


Why A New Standard for Management of Web Services
-------------------------------------------------
Web services use a common middleware layer (Internet) across diverse 
domains for allowing various parties to exchange data.  The most 
prevalent use of Web services today is between businesses or 
inside enterprises to carry business processes and transactions. 
Any such environment should be managed in order to provide the 
security, usability, and reliability needed in today’s business 
environment. Hence, use of tools and standards for security, 
collaborations, process flows, and management are necessary.
  
Currently there is no standard approach to managing Web services.  
What management vendors can offer is instrumentation at the SOAP 
end points and intermediaries (e.g. SOAP servers, UDDI 
servers, etc.).  This will provide information about the Web services 
as they use these applications.  However, this management view is 
incomplete and lacks critical information on the state of the Web 
service as it is executing and messages are traveling between various 
end points.  For such information, Web services need to become much 
more manageable.

It is quite normal for Web services to span enterprise boundaries. 
Existing technologies are designed for management of components within 
an enterprise and are not suitable for Internet wide management. In contrast, 
Web services present a very good platform for inter-enterprise interaction.
Hence, it is only natural to use Web services for managing Web Services.

In this light, the requirements for Managing Web Services are essentially 
requirements for management of web services using web services and hence 
assume the framework being specified under the requirements of "Management 
Using Web Services".
    
Requirements
------------

1. Web Services should be managed using Web Services technology. This
   implies support for all the relevant requirements from "Requirements --
   management Using Web Services" writeup.
2. Should be independnet of any particular middleware implementation to
   support Web Services.
3. Should allow management of Web Services, Web Services Execution 
   Environment (WSEE), Conversation and Intermediaries as 
   Managed Resources.
     + It should be possible to query conversations engaged in by 
       a Web Service.
     + It should be possible to get all Web Services participating
       in a particular Conversation.
     + It should be possible to get the WSEE of a Web Service.
     + It should be possible to get all the Web Services of a WSEE.
     + It should be possible to get Messages of a conversation.
4. Should allow access to following metrics: 
     + messages (total, successful, failed) processed since a specified
       time.
     + response time (average, minumum, maximum) per operation.
5. Should allow start, stop and restart of a Web Service by a Manager
   with appropriate access rights.
5. Should allow tracking of processing overhead as a message travels from
   client to intermediaries, from there to the Web Service and back 
   to the client. It should be possible to get information on processing
   time at each stage.
6. Should support processing of a Ping message by the Web Service for
   testing purposes. This should also allow estimate of response time
   for no-processing message time.
7. Support for the Web Services management standard should not introduce 
   large performance overheads in normal processing of requests.
8. It should be possible to support management of Web services that 
   process signed, encrypted, or signed and encrypted messages.
9. It should be possible to manage normal Web Services without requiring 
   additional infrastructure (such as GRID).
10. It should be possible to support management of a Web Service without
    having a separate Agent.
11. It should support subscription of Web services.
   
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