RE: [wsrm] Explicit Stop with GroupExpiryTime present

Title: RE: [wsrm] Explicit Stop with GroupExpiryTime present

Tom:

inline <JD>

-----Original Message-----

From: Tom Rutt [mailto:]

Sent: Friday, October 31, 2003 8:30 PM

To: wsrm

Subject: [wsrm] Explicit Stop with GroupExpiryTime present

I would like to have us discuss this situation:

A sender starts a group at noon, and determines that it will last until 

6:pm.

It sends all its messages in that group with GroupExpiryTime of 6:pm, 

and whatever

message expiry times it requires (as long as they are not after the 

GroupExpiryTime).

At 4: PM the sender realizes that the sequence is ready to terminate, 

and sends the status=end

attribute in the last message.

My question is, should this group stay around until the 

GroupExpiryTime,  

<JD> depends whether all in this sequence have been received or not:

- if all received (group complete) the group can terminate immediately.

- if some are missing, we fall back to the "t1" case: GroupExpiryTime

is the limit (or until the missing ones arrive).

I have reflected this behavior in a complete proposal I will send after this mail.

or is is allowed to delete the group state info on the 

receiver once the MaxExpiryTimeReceivedInGroup is reached?

<JD> I believe we have to distinguish "terminating a group"

from "removing its state". The group may be terminated (no more message expected for it)

but its state be kept around, precisely until MaxExpiryTimeReceivedInGroup, for dup checks.

(the rationale being, if duplicates arrive after MaxExpiryTimeReceivedInGroup, they

would by definition be expired, and not accepted by RMP. So no point to keep old IDs for

the group).

(i think this was 3a in Jacques proposal)

Tom Rutt

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Tom Rutt                email: ; 

Tel: +1 732 801 5744          Fax: +1 732 774 5133

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