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Subject: Re: [ws-rx] Relationship of ISSUE 008 with ISSUE 021

Ashok Malhotra wrote:

>You can attach policies at the binding level.
>This allows you to do what you want.
To clarify, it seems that the message subject level of attachment can 
use binding scope:

. wsdl:binding/wsdl:operation/wsdl:input
. wsdl:binding/wsdl:operation/wsdl:output
. wsdl:binding/wsdl:operation/wsdl:fault

These are the things that attaching reliability DA levels and other QOS parameters might enable
specification of two-way operation types which have different reliability requirements in each direction.

Tom Rutt

>But there are other problems.  As I see it, the
>binding (or message) definition is for the messages
>in the sequence - not the framing messages such as
>CreateSequence, CreateSequenceResponse, Ack, etc. 
>So if we attach a QoS policy to the binding, which
>messages does it apply to? 
>All the best, Ashok
>>-----Original Message-----
>>From: Tom Rutt [mailto:tom@coastin.com] 
>>Sent: Thursday, September 29, 2005 8:23 AM
>>To: wsrx
>>Subject: [ws-rx] Relationship of ISSUE 008 with ISSUE 021
>>The Sept 2004 version of WS-policy attachment includes the following
>>4.1.4 Message Policy Subject The following WSDL/1.1 elements 
>>are used to describe messages:
>>. wsdl:message
>>. wsdl:portType/wsdl:operation/wsdl:input
>>. wsdl:portType/wsdl:operation/wsdl:output
>>. wsdl:portType/wsdl:operation/wsdl:fault
>>. wsdl:binding/wsdl:operation/wsdl:input
>>. wsdl:binding/wsdl:operation/wsdl:output
>>. wsdl:binding/wsdl:operation/wsdl:fault
>>The current WS-RM policy spec attaches policy at the endpoint 
>>subject level.
>>If we could attach the Qos policy for DA at the message 
>>subject level, we would be in a better position to express 
>>the desired semantics for Reliability of a WSDL 
>>Request/response operation.
>>For example, exactly once, ordered could be attached to the 
>>request message, while no reliability qos is attached to the response.
>>Other examples could attache reliability DA levels to the 
>>response message as well.
>>Thus I now see that Issue 008 on granularity of reliability 
>>policy attachment, and Issue 021 on reliability for two way 
>>exchanges should be discussed together.
>>Tom Rutt
>>Tom Rutt	email: tom@coastin.com; trutt@us.fujitsu.com
>>Tel: +1 732 801 5744          Fax: +1 732 774 5133

Tom Rutt	email: tom@coastin.com; trutt@us.fujitsu.com
Tel: +1 732 801 5744          Fax: +1 732 774 5133

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