Mule error handling
- 1. MULE ERROR HANDLING C H A N D U 1 4 4 3
- 2. EXCEPTIONS • Mule provides numerous options for handling errors. Faults that occur within Mule are referred to as exceptions • There are two categories of exceptions in mule: 1) System Exceptions 2) Messaging Exceptions
- 3. SYSTEM EXCEPTION • Mule invokes a System Exception Strategy when an exception is thrown at the system-level • No message is involved, exceptions are handled by system exception strategies EX: During application start-up or When a connection to an external system fails • Mule sends exception to registered listener and logs the exception • If exception is due to connection failure executes reconnection strategy to connect for a specific number of times
- 4. MESSAGE EXCEPTION • Thrown within a flow whenever a message is involved • Handled by messaging exception strategies • Mule flow throws an exception, normal flow execution stops and processes transfers to the message processor sequence within the exception strategy • Mule supports five types of messaging exception strategies, each of which is capable of handling errors that occur in flows which process transactions
- 5. TYPES OF MESSAGING EXCEPTION STRATEGIES • Default Exception Strategy • Catch Exception Strategy • Choice Exception Strategy • Reference Exception Strategy • Rollback Exception Strategy
- 6. BEST PRACTICE • Create a global default exception strategy to customize the way Mule implicitly handles all exceptions that occur in your application. • Create global exception strategies by defining them outside a flow globalException.xml • Add reference exception strategy in your flow and refer to global exception strategy • Set a default global exception strategy by creating a global configuration element and setting its default exception strategy to a global exception strategy
- 7. THANK YOU