Metrics

org.http4s.server.middleware.Metrics$

object 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

Attributes

Source:: Metrics.scala
Graph
Supertypes: class Object
trait Matchable
class Any
Self type: Metrics.type

Members list

Concise view

Value members

Concrete methods

A server middleware capable of recording metrics

Attributes

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
Source:: Metrics.scala

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.

Attributes

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 classifierF is unsafe, unless you are using some caching middleware.
Source:: Metrics.scala

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