io.aviso.logging.correlation
Defines a minimal namespace containing a dynamic Var used to propogate the correlation id into the logging layer.
*correlation-id*
dynamic
A dynamic var that contains the correlation id used by the %mdc{correlation-id} pattern. Defaults to the empty string.
default-correlation-id-generator
(default-correlation-id-generator request)The default correlation id generator ignores the request, and returns a random UUID string. Alternate implementations may use information in the request to build a more meaningful or semantic name.
wrap-with-request-correlation
(wrap-with-request-correlation handler)(wrap-with-request-correlation handler header-name correlation-id-generator)Wraps a handler with logic that obtains the correlation id from the request (if present).
When the id is not present, a new id is generated.
The id (from the request, or as generated) will be available in the *correlation-id* dynamic Var. This will allow code sending requests to other servers to add the necessary header.
The id will be returned in the response.