There have been many articles and blog postings about “Best Practices” and I thought we needed one about “Anti-Patterns”. We have all experienced them. Simply stating that something is a bad practice or anti-pattern doesn’t mean anything, it is simply an
There needs to be a reason why. And the best way to do this is for us to provide real-life scenarios we have all experienced. We all learn from our mistakes and reading about the mistakes of others. Hopefully the information in this list would benefit someone.
The "Anti-Patterns" in this list are not in any specific order.
A client had decided that they needed an ESB to send data from SharePoint to a Data Repository. They had selected BizTalk 2010 with the ESB Toolkit 2.1.
I don’t believe that they fully understood the capabilities of BizTalk 2010 and how the ESB Toolkit 2.1 is used. Apparently they had no actual experience in architecting and designing BizTalk / ESB Solutions. They did have quite a bit of experience and knowledge
in designing .NET Applications and WCF Services.
Having read all about the use of Itineraries in the ESB Toolkit 2.1, it was decided that their newly trained and inexperienced Lead BizTalk Developer would develop a framework of Itineraries for routing messages, which could be reused. The developer simply
took the samples included with the ESB Toolkit and “adapted” them. The developer was toldthat Itineraries would be designed first. At this time they had no requirements for BizTalk Applications.
To add fuel to the fire, it was dictated that they would use SCRUM for all projects. The BizTalk Developers would develop their Itineraries in multiple sprints.
A BizTalk developer was using the WCF LOB SDK to generate a WCF LOB SQL Adapter service to perform several CRUD Operations on database tables.
The section showing the Operations is shown in the figure below.
He then added a new Request/Response Port with two operations as shown in the figures below.
If you compare the difference between the WCF LOB Service Operations names and what the developer used for the Port Operations Names you will notice that they do not match.
After deploying the Orchestration the developer, he then tried to test it. An Insert Request Message was sent to the WCF Service. He did not receive a Response Message.
After checking the Applications Event Log, he discovered that he had an invalid type error. He came to me for help and we discovered he had misnamed the Operations on the WCFLOBPort in his Orchestration.
The issue here is that both the Operations Name in the Bindings and the Operations Name for the Orchestration Port must be the named the same.
A client wanted to promote the reuse of WCF LOB SQL Adapter services. It was decided that they would use separate Stored Procedures for Create, Update, and Delete operations. They didn’t want the Stored Procedures to contain any business logic.
There was a requirement to:
Someone came up with the idea that it would be worthwhile for all their architects and other developers go through the same training.
Can you imagine what the cost was for several weeks of training?
Prior to my starting with the client, they had migrated several HL7 feeds from their legacy system to BizTalk.
The legacy system administrator became the BizTalk Administrator. They had also contracted for an experienced BizTalk Administrator who had HL7 experience.
Their BizTalk Administrator had done an excellent job of installing and configuring their production environment. IMO, this was the first good decision the client made.
The training would include Monitoring and Troubleshooting.
I recommended that they implement SCOM 2007 R2 or another third-party tool to monitor their BizTalk infrastructure.
We were told us that they ran out of budget money
I also suggested that they create a VM, so the BizTalk Admins could learn how to use SCOM and to evaluate other monitoring tools.This VM was to be used for their training.
It seems that all the architects and developers were provided with a VM and they did not have the resources (storage and memory) to create a new one for the BizTalk Administrators.
Using SMTP has a number of advantages. The biggest advantage is probably that most organisations already have the infrastructure they need to exchange messages per email. So that makes SMTP very interesting to use in integration solutions.
From a BizTalk perspective however, there is an important down-side. This has to do with the state of your orchestrations when things go wrong.
Say your company build bikes. For different bike parts it has different suppliers. When you run out of parts, your BizTalk system orders the needed parts at these suppliers. Communication takes place with a SMTP Send port. The Send Port is configured with
a valid email address and a local mailserver is configured as the SMTP Host. In normal situations the mails sent by the orchestrations flow to the configured email address and the orchestrations continue their work fine.
But now there's a problem with an upstream mailserver. Your mail is sent to that local mailserver, but never reaches the supplier Since BizTalk has correctly sent that email to the local mailserver, the orchestration has continued its processing,
like updating the state of that order in your BizTalk system.
So now we have a problem. BizTalk, or better the orchestration, thinks it has succesfully delivered that email, while in fact it has not been delivered to the configured email address and the message lost in space. The process is broken.
For this reason, I think SMTP is not the best protocol of choice and should be replaced with another protocol, a solid compensating scenario or another pattern.
The below articles are all other anti-patterns and bad practices which people have contributed and links to those resources:
Great Howard! I'll add a couple of bad practices myself as well.
It might be handy to have a number of categories for the different kinds of bad practices.
I think an anti-pattern series for BizTalk would be quite valuable. Thanks Howard!
Keep them coming.
I think we should have an index at the top. We could split them into categories
I am working on another listing..
Great. Having categories would really make this article more accessable
Should we use a a standard format to describe a Bad Practice or Anti-Pattern?
Should we include links to the original post? Or external references?
Should there be any guidelines on what can be posted and what should not be posted?
Yes, I think we should use a standard format to describe the Bad practices or Anti-Patterns.
We should certainly add links to the original posts as this is fair to the original poster.
Where it's helpfull we could certainly add links to external references.
Guidelines could be nice, but I think that most authors know what they can post and what they cannot post. At least the guidelines should be brief.
By the way: I prefer the term Anti-Pattern. What do you think?
Should I change the title to Anti-Patterns?
BizTalk Anti-Patterns List
Valuable list. Thank you, Howard for it.
Anyone have something that they would like to share?
Please add it to the list.
I just fixed the layout to make it fit the rest of the TechNet wiki! :)