WSDL One-way operation type and Data in Soap envelope of underlyingresponse

[Tom Rutt <tom@coastin.com>]

 From the minutes of 6/14 meeting, My comments new to this email start 
with <ter> tag
"
 2b) The  one-way consumer  interface and Response  RM-Reply pattern  is the
     most  direct combination to  reliably deliver  one-way messages  from a
     producer "hidden" behind a firewall.   The matrix in section 5.2 should
     not  disallow this  combination.   While synchronous  polling at  least
     works, it always requires an additional round trip.

<ter>  one of Sunil's objections to the above proposal is based on the 
BP 1.0 restriction.

I Quote from BP 1.0a of WS-I
"


        5.6.10 One-Way Operations

There are differing interpretations of how HTTP is to be used when 
performing one-way operations.

R2714 For one-way operations, an INSTANCE MUST NOT return a HTTP 
response that contains a SOAP envelope. Specifically, the HTTP response 
entity-body must be empty.

R2750 A CONSUMER MUST ignore a SOAP response carried in a response from 
a one-way operation.

R2727 For one-way operations, a CONSUMER MUST NOT interpret a successful 
HTTP response status code (i.e., 2xx) to mean the message is valid or 
that the receiver would process it.

One-way operations do not produce SOAP responses. Therefore, the Profile 
prohibits sending a SOAP envelope in response to a one-way operation. 
This means that transmission of one-way operations can not result in 
processing level responses or errors. For example, a "500 Internal 
Server Error" HTTP response that includes a SOAP message containing a 
SOAP Fault element can not be returned.

The HTTP response to a one-way operation indicates the success or 
failure of the transmission of the message. Based on the semantics of 
the different response status codes supported by the HTTP protocol, the 
Profile specifies that "200" and "202" are the preferred status codes 
that the sender should expect, signifying that the one-way message was 
received. A successful transmission does not indicate that the SOAP 
processing layer and the application logic has had a chance to validate 
the message or have committed to processing it.

Despite the fact that the HTTP 1.1 assigns different meanings to 
response status codes "200" and "202", in the context of the Profile 
they should be considered equivalent by the initiator of the request. 
The Profile accepts both status codes because some SOAP implementations 
have little control over the HTTP protocol implementation and cannot 
control which of these response status codes is sent.

"

<ter> the requirements seem tied to HTTP transport binding for SOAP, 
rather than to SOAP in general. However the first two sentences of 
explanatory text is written regarding Soap in general.

"
One-way operations do not produce SOAP responses. Therefore, the Profile 
prohibits sending a SOAP envelope in response to a one-way operation "


<ter - If we are going to allow response rm reply pattern with WSDL 
One-Way operation we
need to explain our way around this Profile restriction.  >


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