validate
Allows validating a precondition before handling a route.
Description
Checks an arbitrary condition and passes control to the inner route if it returns true
.
Otherwise, rejects the request with a ValidationRejection
containing the given error message.
Example
TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: write example snippets for Akka HTTP Java DSL #20466.
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