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package mech
import (
"fmt"
"sync"
log "github.com/golang/glog"
)
var (
mechLock sync.Mutex
supportedMechs = make(map[string]Factory)
)
func Register(name string, f Factory) error {
mechLock.Lock()
defer mechLock.Unlock()
if _, found := supportedMechs[name]; found {
return fmt.Errorf("Mechanism registered twice: %s", name)
}
supportedMechs[name] = f
log.V(1).Infof("Registered mechanism %s", name)
return nil
}
func ListSupported() (list []string) {
mechLock.Lock()
defer mechLock.Unlock()
for mechname := range supportedMechs {
list = append(list, mechname)
}
return list
}
func SelectSupported(mechanisms []string) (selectedMech string, factory Factory) {
mechLock.Lock()
defer mechLock.Unlock()
for _, m := range mechanisms {
if f, ok := supportedMechs[m]; ok {
selectedMech = m
factory = f
break
}
}
return
}
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