In choice router if first route and second routes conditions are true. Which route it will execute? in MuleSoft 146

 In choice router if first route and second routes conditions are true. Which route it will execute? in MuleSoft

In MuleSoft 4's Choice Router, if both the first route's and the second route's conditions evaluate to true, MuleSoft will only execute the first route's processing logic. This behavior is consistent with how conditional logic typically works in programming languages.

Here's a breakdown of the execution flow:

1. Message Arrives: A message enters the Choice Router.

2. Condition Evaluation: The conditions associated with each route are evaluated sequentially against the message content and attributes.

3. First True Route: If the condition of the first route evaluates to true, the processing logic defined within that route is executed immediately.

4. Subsequent Routes Ignored: Even if subsequent routes also have conditions that evaluate to true, their processing logic is bypassed. The message is considered "handled" after the first successful route execution.

Example:

XML

<choice-router doc:name="Choice Router">
  <when expression="#[payload.type == 'order']">
    <logger message="Processing order" level="INFO" />
    <set-payload value="Order processed" doc:name="Set Order Processed" />
  </when>
  <when expression="#[payload.amount > 100]">
    <logger message="Processing high-value transaction" level="INFO" />
    <enrich target="#[payload]" source="#[{ additionalData: 'appended' }]">
      <enrich-type>MERGE</enrich-type>
    </enrich>
  </when>
  <default-otherwise>
    <logger message="Default route" level="INFO" />
  </default-otherwise>
</choice-router>

Explanation:

• In this example:

• If a message arrives with payload.type equal to "order", the first route's condition is true, and its processing logic (logging and setting payload) executes.

• Even if the payload.amount also happens to be greater than 100 (making the second route's condition true as well), the second route's logic is not processed.

Key Points:

• Choice Router prioritizes evaluating conditions from top to bottom.

• The first route with a true condition dictates the execution path.

• Subsequent routes, even with true conditions, are skipped to avoid unintended processing.

Recommendations:

• Order your Choice Router conditions carefully, placing the most likely scenarios or specific conditions at the top.

• Consider using a default route (<default-otherwise>) as a catch-all for messages that don't match any defined conditions.

By understanding this behavior, you can effectively design your MuleSoft 4 flows to handle messages based on specific criteria and ensure the intended processing logic is executed for each message.