Re: [wsrm] Action item for ReplyTo definition

[Patrick Yee <kcyee@cecid.hku.hk>]

Another thinking.
I understand the motivation to put ReplyTo under AckRequested. But 
ReplyTo is not limited to acknowledgment as stated. It will be the 
endpoint for sending fault messages as well. Where should I locate the 
ReplyTo URL for sending fault messages if AckRequested is not used?

Regards, -Patrick


Tom Rutt wrote:

> This mail is my contribution for fixing the definition for ReplyTo 
> element. I also made necessary
> changes to the ackRequested element to get rid of the words 
> "asynchronous" and "synchronous".
>
> --------------------
>
> The current text states:
>
> “
>
> *3.2.2. ReplyTo Element*
>
> This is a REQUIRED element, used to specify the initial sender’s 
> endpoint to receive an
>
> asynchronous Acknowledgment message or Fault Message. The value of 
> this element is
>
> REQUIRED to be URL as defined in [RFC 1738].
>
> “
>
> However this does not properly reflect the differences between use of 
> the reply
>
> acknowledgment binding pattern and the callback acknowledgement pattern.
>
> Lets first modify the definition for the AckRequested element to 
> change the use of the
>
> terms synchronous and asynchronous to the new terms “reply 
> acknowledgment pattern”
>
> and “callback acknowledgement pattern”.
>
> “*3.2.4. AckRequested Element*
>
> The AckRequested element is an OPTIONAL element. It is REQUIRED for
>
> guaranteeing message delivery and message order. However this element 
> MUST NOT
>
> appear in a non-Reliable Message. This element is to be used for a 
> sender to request the
>
> receiver to send back an Acknowledgment message for the message sent. The
>
> AckRequested element contains the following attribute:
>
> - an *ackPattern *attribute
>
> *(1) ackPattern attribute*
>
> The ackPattern attribute is an OPTIONAL attribute. This attribute is 
> used to specify
>
> whether the Acknowledgment Message should be sent back directly in the 
> reply to the reliable message or
>
> in a separate callback request. This attribute, when used, MUST have 
> one of the following two values.
>
> The default value of this attribute is “Reply”, when omitted.
>
> - *Reply *: An Acknowledgment Message MUST be sent back directly in 
> the Reply to the Reliable Message.
>
> - *Callback*: An Acknowledgment Message MUST be sent as a callback 
> request, using the address in the
>
> ReplyTo element
>
> “
>
> With this modification the ReplyTo definition can be modified as follows:
>
> “
>
> *3.2.2. ReplyTo Element*
>
> This is an OPTIONAL element, used to specify the initial sender’s 
> endpoint to receive a callback
>
> Acknowledgment message or Fault Message. A value of this element MUST 
> be present in the request
>
> message if the AckRequested element indicates that the Callback 
> Acknowledgement pattern is requested.
>
> If present, the ReplyTo element is required to be URL as defined in 
> [RFC 1738].
>
> “
>
>