storj/private/errs2/collect.go

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2019-01-24 20:15:10 +00:00
// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package errs2
import (
"time"
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"github.com/zeebo/errs"
)
// Collect returns first error from channel and all errors that happen within duration
func Collect(errch chan error, duration time.Duration) error {
errch = discardNil(errch)
errlist := []error{<-errch}
timeout := time.After(duration)
for {
select {
case err := <-errch:
errlist = append(errlist, err)
case <-timeout:
return errs.Combine(errlist...)
}
}
}
// discard nil errors that are returned from services
func discardNil(ch chan error) chan error {
r := make(chan error)
go func() {
for err := range ch {
if err == nil {
continue
}
r <- err
}
close(r)
}()
return r
}