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package worker
import (
"sync/atomic"
)
// SYNC WITH worker_watcher.GET
const (
// StateInactive - no associated process
StateInactive int64 = iota
// StateReady - ready for job.
StateReady
// StateWorking - working on given payload.
StateWorking
// StateInvalid - indicates that WorkerProcess is being disabled and will be removed.
StateInvalid
// StateStopping - process is being softly stopped.
StateStopping
// StateKilling - process is being forcibly stopped
StateKilling
// State of worker, when no need to allocate new one
StateDestroyed
// StateStopped - process has been terminated.
StateStopped
// StateErrored - error StateImpl (can't be used).
StateErrored
)
type StateImpl struct {
value int64
numExecs uint64
// to be lightweight, use UnixNano
lastUsed uint64
}
// Thread safe
func NewWorkerState(value int64) *StateImpl {
return &StateImpl{value: value}
}
// String returns current StateImpl as string.
func (s *StateImpl) String() string {
switch s.Value() {
case StateInactive:
return "inactive"
case StateReady:
return "ready"
case StateWorking:
return "working"
case StateInvalid:
return "invalid"
case StateStopping:
return "stopping"
case StateStopped:
return "stopped"
case StateKilling:
return "killing"
case StateErrored:
return "errored"
case StateDestroyed:
return "destroyed"
}
return "undefined"
}
// NumExecs returns number of registered WorkerProcess execs.
func (s *StateImpl) NumExecs() uint64 {
return atomic.LoadUint64(&s.numExecs)
}
// Value StateImpl returns StateImpl value
func (s *StateImpl) Value() int64 {
return atomic.LoadInt64(&s.value)
}
// IsActive returns true if WorkerProcess not Inactive or Stopped
func (s *StateImpl) IsActive() bool {
val := s.Value()
return val == StateWorking || val == StateReady
}
// change StateImpl value (status)
func (s *StateImpl) Set(value int64) {
atomic.StoreInt64(&s.value, value)
}
// register new execution atomically
func (s *StateImpl) RegisterExec() {
atomic.AddUint64(&s.numExecs, 1)
}
// Update last used time
func (s *StateImpl) SetLastUsed(lu uint64) {
atomic.StoreUint64(&s.lastUsed, lu)
}
func (s *StateImpl) LastUsed() uint64 {
return atomic.LoadUint64(&s.lastUsed)
}
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