singleflight

package
v1.0.0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jan 20, 2026 License: MIT Imports: 9 Imported by: 0

Documentation

Overview

Package singleflight provides a duplicate function call suppression mechanism.

Updated to use generics in Go 1.18+ import "golang.org/x/sync/singleflight"

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func AllCloser 

func AllCloser(r io.Closer, mw []io.WriteCloser) io.Closer

Types

type Group 

type Group struct {
	// contains filtered or unexported fields
}

Group represents a class of work and forms a namespace in which units of work can be executed with duplicate suppression.

func (*Group) Do 

func (g *Group) Do(key string, fn func() (*http.Response, error)) (v *http.Response, err error, shared bool)

Do executes and returns the results of the given function, making sure that only one execution is in-flight for a given key at a time. If a duplicate comes in, the duplicate caller waits for the original to complete and receives the same results. The return value shared indicates whether v was given to multiple callers.

func (*Group) DoChan 

func (g *Group) DoChan(key string, waiter time.Duration, fn func() (*http.Response, error)) <-chan Result

DoChan is like Do but returns a channel that will receive the results when they are ready.

The returned channel will not be closed.

func (*Group) Forget 

func (g *Group) Forget(key string)

Forget tells the singleflight to forget about a key. Future calls to Do for this key will call the function rather than waiting for an earlier call to complete.

type Result 

type Result struct {
	Val    *http.Response
	Err    error
	Shared bool
}

Result holds the results of Do, so they can be passed on a channel.

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.