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RE: Announce: WS-Callback, WS-MessageData, and WS-Acknowledgement specifications

From: Ricky Ho <riho@cisco.com>
Date: Fri, 16 May 2003 07:46:02 -0700
Message-Id: <>
To: "Omprakash Bachu" <omprakash.bachu@mphasis.com>, www-ws-arch@w3.org

Within the reliable messaging scope (which is a narrower scope than 
WS-Acknowledge targets), when an sender send a stream of bytes over a 
socket, if the sender successfully close the socket, TCP guarantees that 
the whole stream of bytes is received successfully.  In case of any 
problem, the sender will know about that by receiving an exception.

But ... how about the receiver machine crash right after all the bytes are 
received.  On the other hand, SOAP is protocol agnostic and doesn't need to 
be sent over HTTP (hence TCP cannot be assumed).  Therefore, a higher level 
acknowledgement mechanism is needed.

But there are other areas beside reliable messaging which may also need 
acknowledgement, so why not provide a "general" acknowledgement standard to 
deal with that.  Hopefully achieve a broader reuse.

Rgds, Ricky

>-----Original Message-----
>From: Omprakash Bachu [mailto:omprakash.bachu@mphasis.com]
>Sent: Thursday, May 15, 2003 1:36 PM
>To: www-ws-arch@w3.org
>Subject: Re: Announce: WS-Callback, WS-MessageData, and
>WS-Acknowledgement specifications
>I'm kind of curious why do we need the WS-Acknowledgement when SOAP is
>over HTTP which is anyway TCP/IP based protocol ??? Is this meant for
>SOAP over other protocols like UDP?
>  Om
Received on Friday, 16 May 2003 10:46:12 UTC

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