As a user I want to be able to know in advance what will be the data type returned after a message transformation

• User impact:

  High
• Affects Docs:

  Yes
• Similar Issues:

  None

Mule currently manages transformations in a weak way, one of the main problems is that it does not enforce the application of transformers on a given message, so is not possible to know in advance what would be the payload type of a message after a given transformation.

Problems:

• Given a transformer chain, you cannot know in advance what will be the data type of the payload after the transformation.
• Because transformers are just skipped with no error, users can think they are doing everything ok and then found an error later on the flow, making the error analysis hard.