errgroup

package
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Published: Jun 1, 2020 License: Apache-2.0 Imports: 1 Imported by: 0

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type Group

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

A Group is a collection of goroutines working on subtasks that are part of the same overall task.

A zero Group is valid and does not cancel on error.

func WithNErrs

func WithNErrs(nerrs int) *Group

WithNErrs returns a new Group with length of errs slice upto nerrs, upon Wait() errors are returned collected from all tasks.

func (*Group) Go

func (g *Group) Go(f func() error, index int)

Go calls the given function in a new goroutine.

The first call to return a non-nil error will be collected in errs slice and returned by Wait().

func (*Group) Wait

func (g *Group) Wait() []error

Wait blocks until all function calls from the Go method have returned, then returns the slice of errors from all function calls.

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