promutil

Documentation

Overview

Package promutil contains utilities for collecting Prometheus metrics.

Index

• func InstrumentRoundTripper(name string, rt http.RoundTripper) http.RoundTripper
• type Adder
• type CountingReader
  • func (r *CountingReader) Read(p []byte) (n int, err error)
• type CountingWriter
  • func (w *CountingWriter) Write(p []byte) (n int, err error)

Functions

func InstrumentRoundTripper

func InstrumentRoundTripper(name string, rt http.RoundTripper) http.RoundTripper

InstrumentRoundTripper returns an http.RoundTripper that collects Prometheus metrics; delegating to the underlying RoundTripper to actually make requests.

Types

type Adder

type Adder interface {
	Add(float64) // Implemented by prometheus.Counter.
}

Adder is something that can be added to.

type CountingReader

type CountingReader struct {
	io.Reader
	Counter Adder
}

CountingReader exports a count of bytes read from an underlying io.Reader.

func (*CountingReader) Read

func (r *CountingReader) Read(p []byte) (n int, err error)

Read implements io.Reader.

type CountingWriter

type CountingWriter struct {
	io.Writer
	Counter Adder
}

CountingWriter exports a count of bytes written to an underlying io.Writer.

func (*CountingWriter) Write

func (w *CountingWriter) Write(p []byte) (n int, err error)

Write implements io.Writer.