module validation

[jeromevdl]

Issue #, if available:

Description of changes:

Validation module, permits to validate events and responses agains JSON schema

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

Breaking change checklist

RFC issue #:

• Migration process documented
• Implement warnings (if it can live side by side)

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[msailes]

Is there any way we can eagerly load the schema from file during init phase?

[jeromevdl]

Is there any way we can eagerly load the schema from file during init phase?

You could use the Validator.getJsonSchema("classpath:/schema.json") out of the handler, so that it is loaded and cached. Not sure how to do it transparently for the developer.
But at least, once loaded, it is cached so it will be reloaded only for new lambda instances.

[msailes]

@Validation annotation is used to validate either inbound or functions' response.

to

@Validation annotation is used to validate either inbound events or functions' response.

[msailes]

approved