How do you enrich messages with external payloads in Mule 4?

Enriching messages with external payloads in Mule 4 involves incorporating additional data into a given message in a way that enhances the original information. The correct approach is to use target and targetValue components, which allow for defining where the external data should be merged into the payload being processed.

This method works by specifying a target location in the message structure where the external payload should be inserted or updated. The targetValue component specifies the value being enriched into that predefined target. This straightforward mapping ensures that the original message is retained while simultaneously adding more contextual information from an external source, such as a database or API call.

This capability is particularly useful when developing integrations that require combining data from disparate systems or enriching incoming messages with additional context drawn from external sources. By utilizing these components effectively, developers can build robust and flexible data flows that meet complex business requirements.