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utils.go
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/
utils.go
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package goworker
import (
"context"
"strconv"
"strings"
"sync"
)
func FanIn(ctx context.Context, channels ...<-chan error) <-chan error {
var wg sync.WaitGroup
multiplexedChan := make(chan error)
multiplex := func(c <-chan error) {
defer wg.Done()
for i := range c {
select {
case <-ctx.Done():
return
case multiplexedChan <- i:
}
}
}
wg.Add(len(channels))
for _, c := range channels {
go multiplex(c)
}
go func() {
wg.Wait()
close(multiplexedChan)
}()
return multiplexedChan
}
func ResolveClusterParameter(params string) map[int]string {
var res map[int]string
if params == "" {
return res
}
ps := strings.Split(params, ",")
if len(ps) < 1 {
return res
}
res = make(map[int]string, len(ps))
for _, item := range ps {
kv := strings.Split(item, "=")
if len(kv) != 2 {
return nil
}
k := strings.Trim(kv[0], " ")
v := strings.Trim(kv[1], " ")
index, err := strconv.Atoi(k)
if err != nil {
return nil
}
res[index] = v
}
return res
}