<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<TITLE>Event Queues - Comments on Pros & Cons?</TITLE>
<META content="MSHTML 5.00.2919.6307" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=839010607-27092001>Alan
& Stefan,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=839010607-27092001></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=839010607-27092001>Thankyou for your replies, I understand the
functionality now and like it. I think that option 3 ' Do Not Change Linkage'
makes the most sense for us.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=839010607-27092001>Also
it wasn't that I would want to capture the events that failed because of a start
condition, rather the opposite I was wondering if they would be captured
uneccessarily</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=839010607-27092001>Alan I
also checked out your virtual classroom presentation which was an excellent way
of providing information on new things - thanks!</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=839010607-27092001></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=839010607-27092001>Regards,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=839010607-27092001>Andrew</SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader><FONT face="Times New Roman"
size=2>-----Original Message-----<BR><B>From:</B> Rickayzen, Alan
[mailto:alan.rickayzen@sap.com]<BR><B>Sent:</B> Thursday, 20 September 2001
17:27<BR><B>To:</B> SAP-WUG@MITVMA.MIT.EDU<BR><B>Subject:</B> Re: Event Queues
- Comments on Pros & Cons?<BR><BR></DIV></FONT>
<DIV><SPAN class=203185106-20092001><FONT color=#0000ff face=Arial size=2>Hi
Andrew,</FONT></SPAN></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001>I go into more detail about the recommendations about
when to use the event queue and when not to in the "what's new to
6.10" virtual classroom presentation in SAPNet. I admit this is
the last place that you'd expect information about older Releases but there
you have it.</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001>Only the events that error out within the receiver
are added to the error queue. E.g. problems starting the flow because the
object does not yet exist or a table space filled up. The evaluation of the
check functions including start conditions takes place beforehand so if the
condition is false (or your check routine returns an exception) the
event is not added to the queue. </SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001>I'm not sure why you would want to restart events
where they have been configured to evaporate without any consequences (via the
conditions). For debugging purposes you can view such events in the event
trace but there'd be little point in restarting
them.</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001>Kind regards,</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001>
<P><B><FONT color=#000080 face=Arial>Alan Rickayzen</FONT></B> <BR><FONT
color=#808080 face=Courier>WebFlow Product Manager</FONT> <BR><B><FONT
color=#808080 face=Courier size=1>SAP AG</FONT></B> </P>
<P><FONT color=#808080 face=Courier size=1>Techdev</FONT><B></B> <BR><FONT
color=#808080 face=Courier size=1>Neurottstra_e 15 </FONT><BR><FONT
color=#808080 face=Courier size=1>69190 Walldorf </FONT><BR><BR><FONT
color=#808080 face=Courier size=1>E-mail
alan.rickayzen@sap.com</FONT> </P>
<P><FONT color=#808080 face=Courier size=1><A
href="http://service.sap.com/webflow"
target=_blank>http://service.sap.com/webflow</A></FONT>
</P></SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=203185106-20092001></SPAN></FONT></FONT></FONT><FONT face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=203185106-20092001> </SPAN></FONT></FONT></FONT><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Rankin, Andrew AJ
[mailto:Andrew.J.Rankin@BHPBilliton.com]<BR><B>Sent:</B> Donnerstag, September
20, 2001 4:45 AM<BR><B>To:</B> SAP-WUG@MITVMA.MIT.EDU<BR><B>Subject:</B> Event
Queues - Comments on Pros & Cons?<BR><BR></DIV></FONT>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<P><FONT face=Arial size=2>Hi all,</FONT> </P>
<P><FONT face=Arial size=2>From what I have read, event queues are available
to assist with performance where there is a likelihood of a large number of
the same event being created in a very short space of time. To date, I
haven't used them and haven't had problems, and I don't expect that to
change. However the other thing that also interests me is that you can use
the event queue to manage the case where event linkages end in an error, so
that with the correct settings in the event linkage, if necessary these
events can be resubmitted once the problem is fixed.</FONT></P>
<P><FONT face=Arial size=2>We had the situation a while ago where a small
number of event linkage instances went into error because a table space was
filled. Fortunately it was picked up early, and I only had to recreate a
small number of these events by hand. If the number was large, I don't know
how I would manage to kick off all the worklfows required without spending
many tedious hours doing it manually. Perhaps this was a freak occurrence,
but it makes me think that I should switch on the event queue for
everything, to cover this risk in the future. So what is the downside to
using the event queue, if any?</FONT></P>
<P><FONT face=Arial size=2>The other thing I'm wondering though is if I do
switch it on, will it see event linkages that end with exception due to a
start condition killing it (which we want to happen)? What else do I need to
consider?</FONT></P>
<P><FONT face=Arial size=2>I thank you for any expert advice.</FONT> </P>
<P><FONT face=Arial size=2>Andrew Rankin.</FONT> </P><BR>
<P><FONT face=Arial size=2>EOM </FONT></P>
<P><FONT face=Arial size=2>NOTICE - This message and any attached files may
contain information that is confidential and/or subject of legal privilege
intended only for use by the intended recipient. If you are not the intended
recipient or the person responsible for delivering the message to the
intended recipient, be advised that you have received this message in error
and that any dissemination, copying or use of this message or attachment is
strictly forbidden, as is the disclosure of the information therein.
If you have received this message in error please notify the sender
immediately and delete the
message.</FONT></P></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
<BR>
<P><FONT SIZE=2 FACE="Arial">EOM </FONT></P>
<BR>
<P><FONT SIZE=2 FACE="Arial">NOTICE - This message and any attached files may contain information that is confidential and/or subject of legal privilege intended only for use by the intended recipient. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, be advised that you have received this message in error and that any dissemination, copying or use of this message or attachment is strictly forbidden, as is the disclosure of the information therein. If you have received this message in error please notify the sender immediately and delete the message.</FONT></P>