Metrics
Server middleware to record metrics for the http4s server.
This middleware will record:
- Number of active requests
- Time duration to send the response headers
- Time duration to send the whole response body
- Time duration of errors and other abnormal terminations
This middleware can be extended to support any metrics ecosystem by implementing the org.http4s.metrics.MetricsOps type
Value members
Concrete methods
A server middleware capable of recording metrics
A server middleware capable of recording metrics
- Value parameters:
- classifierF
a function that allows to add a classifier that can be customized per request
- emptyResponseHandler
an optional http status to be registered for requests that do not match
- errorResponseHandler
a function that maps a java.lang.Throwable to an optional http status code to register
- ops
a algebra describing the metrics operations
- Returns:
the metrics middleware
A server middleware capable of recording metrics
A server middleware capable of recording metrics
Same as apply, but can classify requests effectually, e.g. performing side-effects.
Failed attempt to classify the request (e.g. failing with F.raiseError) leads to not recording metrics for that request.
- Value parameters:
- classifierF
a function that allows to add a classifier that can be customized per request
- emptyResponseHandler
an optional http status to be registered for requests that do not match
- errorResponseHandler
a function that maps a java.lang.Throwable to an optional http status code to register
- ops
a algebra describing the metrics operations
- Returns:
the metrics middleware
- Note:
Compiling the request body in
classifierFis unsafe, unless you are using some caching middleware.