Eduard’s Weblog

General

• Use the latest service pack level. Fixes can be found on IBM WPS support site: http://www-306.ibm.com/software/integration/wps/support/
• Do not use default path to install. Choose the shortest possible path, avoid blanks (i.e. C:\IBM\WPS).
• Design your service interfaces first. Adding additional fields after deployment may cause issues.
• Reuse existing applications and do not try to split them up if not necessary.

Business Processes

• Prefer BPEL constructs in processes over Java inline code.
• Avoid potential deadlock situations: do not access same variables from two parallel paths and use escalation or timeout mechanism for any asynchronous blocking activity.
• Use dynamic modeling options for decision based on runtime data.
• Use BPEL Fault Handlers when you think that this fault is a part of your business process logic.
• Use “continue on error” option if faults are rarely expected and require human intervention.
• External large data should be referenced.
• Regularly cleanup process choreographer database to speed up query performance.
• Use WPS Business Rules, if the process needs to be changed frequently.

Human Task Manager

Inline task:
An inline task is defined within an implementation of a business process.
Model as an inline task if:

• you need information from the process context
• you want to execute administrative tasks
• you want to define authorization rights on specific activities

Stand-alone task:
A stand-alone task exists independently of a business process.
Model as stand-alone task if:

• you do not need any information from the process context
• your implementation need to be BPEL compliant
• the task should be reused

Business State Machine

• Do not put any logic in generated BPEL.
• It will be overridden when changing state machine.
• Use a composite state to reduce number of transitions needed.
• Avoid long-running service calls in business state machine models.
• Not sure: use BPEL process

Business Rule Manager

• Know the difference between rule set (can be executed with multiple results) and decision table (only first positive condition will fire the action).
• Trying to write a rule set which will have one outcome may become very complex and difficult to maintain.
• Do not forget about security. BRM is tied to J2EE and EJB role settings and without global security anyone can modify/delete business rules!

Development and customer integration

• Use windows platform for development. Unix based systems are difficult to configure and need more time to setup system.
• Setup repositories to avoid concurrent modification of files.
• Use configuration scripts shipped with product or create your own for automating administrative tasks.
• Make a backup regularly.
• Make a deep testing of your system before deploying to production. Try to get service definitions and original data to be integrated. Use WSP testing mechanism.
• Enable WebSphere Security from the first day.

Um meinen Leserkreis zu erweitern und gleichzeitig meine Englischkenntnisse etwas zu trainieren, habe ich beschlossen einige ausgewählte Beträge in Zukunft in Englisch zu verfassen.

Feedback und Korrekturen sind sehr willkommen!