Presentation at the Azure Lunchtime meetup about Exception Management for Logic Apps

1. Exception management
patterns in Logic Apps

2. Who am I?
Wagner Silveira
Principal Integration Architect
Microsoft MVP - Azure
MCSA – Cloud Platform

3. Agenda
•What is Logic Apps
•Exception management components
•Some patterns
•Lessons learned

5. Logic Apps
• Microsoft Integration Platform as a Service (IPaaS) offering
• Business Processes Orchestration in the Cloud
• Azure factor (pay as you go, pay per usage, scale on demand)
• Cloud and Hybrid Integration
• Multiple Trigger Patterns
• Manual Invocation
• Event Based
• Scheduled
• Extensible

6. Concepts
• Workflows
• Triggers
• Actions
• Connectors
• Flow structures

7. Planning for the unexpected
• Try again
• Plot alternative paths
• Divide and conquer
• Finish execution

8. Exception management components
• Retry policies
• Run after
• Scopes
• Terminate

9. Retry policies
• Retry execution based on status code
‐ 429 | 5xx
• Two modes
‐ Fixed  based on interval and count
‐ None
• Out of the box  20s x 4
• Can be configured from designer

10. Run after
• Define execution order
• Based on name and status
• Define success and failure flows
• Can be configured from designer
• Multiple predecessors possible (from code)

11. Scopes
• Group a series of workflow elements
• Can host any action or flow control
• Simplify exception management

12. Terminate
• Force workflow termination
• Define final workflow status
‐ Succeeded
‐ Cancelled
‐ Failed
 Error Code
 Error Message

13. Hands on time
Exploring the tools

14. Patterns
• Controlling the flow
• Collating error information
• Group logical blocks by scope

15. Controlling the Flow
• Similar to try/catch
• Use scope for try
• Use run after for catch
• Use terminate to
control the result

16. Collating error information
• Filter scope results for errors
• Use information
‐ Propagate error
‐ Notify
‐ Log

17. Group logical blocks by scope
• Identify logical blocks
• Wrap them around scopes
• Allow
‐ Compensation
policies
‐ More
granularity

18. Hands on time
Collating information

19. Lessons learned
• Use scope from start
• Use multiple scopes for more control
• Have the right retry policy
• Do Until can replicate retry

20. Takeaways
• Logic Apps have good tools for exception management
• Latest changes in UI makes it simpler
• Scopes can help you control the flow
• Think about the right retry policies
• Plan it from start

21. Thank you!
@wsilveiranz | wagner.Silveira@theta.co.nz