Handling Local Exceptions in Mule

A catch exception strategy can be defined to customize the way Mule handles messages with errors. A catch exception strategy catches all exceptions thrown within its flow and processes them, thereby overriding Mule’s implicit default exception strategy.

Mule’s catch exception strategy behavior is similar to a Java catch block, except that a new exception cannot be thrown or another exception cannot be caught within a catch exception strategy.
For local catch-exception-strategy, exception strategies can be configured on a per-flow basis. This is done by defining an exception strategy at the end of each flow definition.

Let’s start by configuring an exception strategy inside a flow. Let’s use a catch-exception-strategy that will catch and process all exceptions thrown in the flow

Here you can find one new element, the catch-exception-strategy. This element instructs the flow to respond with a String that summarizes the exception message, for any kind of error.

The graphical representation is shown below


catch-exception-strategy

The PriceCalculator java class source code

When you run the mule application, you will see below outputs on different inputs


catch-exception-strategy


catch-exception-strategy


catch-exception-strategy

Console Output

Thanks for reading.

Soumitra

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