DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

orElse(TryResult<T>, () -> R): T | R

Returns the result of the orElse if the previous try result failed if not returns the result of the previous

Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later.


Name Description


Previous try result


The next option to try if the previous fails


This example waits shows how to chain different try


%dw 2.0
import * from dw::Runtime
var user = {}
var otherUser = {name: "DW"}
output application/json
    a: try(() -> user.name!) orElse "No User Name",
    b: try(() -> otherUser.name) orElse "No User Name"


  "a": "No User Name",
  "b": "DW"

Was this article helpful?

💙 Thanks for your feedback!

Edit on GitHub
Submit your feedback!
Share your thoughts to help us build the best documentation experience for you!
Take our latest survey!