Is there a pub/sub system underneath BizTalk?

re: Is there a pub/sub system underneath BizTalk?

jc — Fri, 23 Jul 2004 21:38:00 GMT

Could you explain what is the MessageAgent ? Is it a .NET component, a COM component, something in Sql Server... ??

re: Is there a pub/sub system underneath BizTalk?

Lars — Fri, 23 Jul 2004 21:42:00 GMT

Were reading it allright!! Not understanding all of it but hoping that I someday will :) Naahh ... its really valuable. Keep it up!! Its all these little pieces of the puzzle that I really need to understand this gigantic product.

regards
Lars

re: Is there a pub/sub system underneath BizTalk?

Lee — Fri, 23 Jul 2004 21:50:00 GMT

It's not really important whether the agent is a COM object or a .Net component. It lives in the nt process (btsntsvc) not on sql server and provides interfaces to the engine for interacting with the messagebox. I don't want the engine devlopers to have to know what stored procedures to call or how to make sure calls are ordered correctly to avoid excessive locking or even deadlocks. Again, though, this (the agent) is not something you really need to worry about. Just excessive information

re: Is there a pub/sub system underneath BizTalk?

jc — Fri, 23 Jul 2004 21:54:00 GMT

ok, I understand, but I needed the information for my trainees (I give a BT training and in a slide the MessageAgent is written...).

re: Is there a pub/sub system underneath BizTalk?

Duncan Millard — Mon, 26 Jul 2004 11:55:00 GMT

Lee - posts like this are absolutely invaluable. My employer (Solidsoft) specialises in BizTalk implementations (you just had one of my colleagues out there for a week infact) and we need and want this deep level of understanding of the product. Keep it up - it's great stuff.

I'd love to know some more about routing on repeating elements as it's a pain point for me right now, eg: (hope this HTMLEncodes ok):

<Destinations>
<Destination>Person1</Destination>
<Destination>Person2</Destination>
</Destinations>

As you say, the UI won't let me promote Destination. Time to go digging in custom pipelines :-)

re: Is there a pub/sub system underneath BizTalk?

Lee — Tue, 03 Aug 2004 10:23:00 GMT

Routing is supported on repeating elements, but the engine will not do it for you. You have to do it yourself in custom code. If you promote a property with A=1, A=2, and A=3, and someone subscribes to any of those values, you will cause the message to be routed. Simply pass in an array to the promote call (VT_ARRAY | VT_???? in unmanaged). Note that you cannot reference this property from within an orchestration or you will get an exception as they don't support multi valued properties. But if you just want to route on it ... go for it.

Lee

Geek Notes 2004-08-04

Geek Noise — Thu, 05 Aug 2004 00:36:00 GMT

Starting BizTalk Server 2004 orchestrations using the MessageAgent.

Jes — Sat, 08 Jan 2005 19:42:00 GMT

Mick's Breeze Blogs - Biztalk/Sharepoint/... - BizTalk optimising Send Port Subscriptions

Tue, 20 Feb 2007 02:08:28 GMT

PingBack from http://blogs.breezetraining.com.au/mickb/2007/02/19/BizTalkOptimisingSendPortSubscriptions.aspx

A loosely coupled Scatter-and-Gather implementation In BizTalk 2006 by .RICHARD

A loosely coupled Scatter-and-Gather implementation In BizTalk 2006 by .RICHARD — Tue, 15 Jan 2008 19:47:27 GMT

PingBack from http://www.webhostingsearch.com/blogs/richard/a-loosely-coupled-scatter-and-gather-implementation-in-biztalk-2006/