singleflight - ActiveState ActiveGo 1.8
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Package singleflight

import "go4.org/syncutil/singleflight"
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Package singleflight provides a duplicate function call suppression mechanism.

type Group

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

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

func (*Group) Do 

func (g *Group) Do(key string, fn func() (interface{}, error)) (interface{}, error)

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.