[CAMEL-18368] Kamelet jslt-action not handling byte[] input

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.18.2, 3.19.0
• Component/s: camel-k

Environment

The samples have been tested with the Camel K Operator 1.9.x on an OpenShift environment.

• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Bruno Meseguer
• Created: 09/Aug/22 09:15
• Updated: 10/Aug/22 12:56
• Resolved: 10/Aug/22 12:56

Description

the [jslt-action] kamelet, based on the JSLT component is very handy for performing data transformations with JSON input.

However, when configuring KameletBindings, for non-Camel users, it becomes tricky as some Kamelet sources deliver JSON in byte[]. If we bind for example a Telegram Source with the JSLT action before sending it to some backend, the process fails with the following message:

org.apache.camel.ValidationException: Allowed body types are String or InputStream.. Exchange[]

 One way to work around the problem is to customise the JSLT-action to convert the body to String, or modify the Telegram source to deliver String JSON payloads.

Attached is a sample project containing a modified JSLT-action and a sample KameletBinding connecting Telegram to the JSLT action. Note the modified action converts the body to String.