Packages

object Metrics

Client middleware to record metrics for the http4s client.

This middleware will record: - Number of active requests - Time duration to receive the response headers - Time duration to process the whole response body - Time duration of errors, timeouts and other abnormal terminations

This middleware can be extended to support any metrics ecosystem by implementing the org.http4s.metrics.MetricsOps type

Source
Metrics.scala
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  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
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  4. def apply[F[_]](ops: MetricsOps[F], classifierF: (Request[F]) ⇒ Option[String] = (_: Request[F]) =>
    None    )    (client: Client[F])(implicit F: Clock[F], C: Concurrent[F]): Client[F]

    Wraps a Client with a middleware capable of recording metrics

    Wraps a Client with a middleware capable of recording metrics

    ops

    a algebra describing the metrics operations

    classifierF

    a function that allows to add a classifier that can be customized per request

    client

    the Client to gather metrics from

    returns

    the metrics middleware wrapping the Client

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  7. def effect[F[_]](ops: MetricsOps[F], classifierF: (Request[F]) ⇒ F[Option[String]])(client: Client[F])(implicit F: Clock[F], C: Concurrent[F]): Client[F]

    Wraps a Client with a middleware capable of recording metrics

    Wraps a Client with a middleware capable of recording metrics

    Same as apply, but can classify requests effectually, e.g. performing side-effects or examining the body. Failed attempt to classify the request (e.g. failing with F.raiseError) leads to not recording metrics for that request.

    ops

    a algebra describing the metrics operations

    classifierF

    a function that allows to add a classifier that can be customized per request

    client

    the Client to gather metrics from

    returns

    the metrics middleware wrapping the Client

    Note

    Compiling the request body in classifierF is unsafe, unless you are using some caching middleware.

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