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package roadrunner
import (
"fmt"
"sync/atomic"
)
// State represents WorkerProcess status and updated time.
type State interface {
fmt.Stringer
// Value returns state value
Value() int64
// Set sets the state
Set(value int64)
// NumJobs shows how many times WorkerProcess was invoked
NumExecs() int64
// IsActive returns true if WorkerProcess not Inactive or Stopped
IsActive() bool
// RegisterExec using to registering php executions
RegisterExec()
// SetLastUsed sets worker last used time
SetLastUsed(lu uint64)
// LastUsed return worker last used time
LastUsed() uint64
}
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
// State of worker, when no need to allocate new one
StateDestroyed
// StateStopped - process has been terminated.
StateStopped
// StateErrored - error state (can't be used).
StateErrored
StateRemove
)
type state struct {
value int64
numExecs int64
// to be lightweight, use UnixNano
lastUsed uint64
}
// Thread safe
func newState(value int64) *state {
return &state{value: value}
}
// String returns current state as string.
func (s *state) String() string {
switch s.Value() {
case StateInactive:
return "inactive"
case StateReady:
return "ready"
case StateWorking:
return "working"
case StateInvalid:
return "invalid"
case StateStopped:
return "stopped"
case StateErrored:
return "errored"
}
return "undefined"
}
// NumExecs returns number of registered WorkerProcess execs.
func (s *state) NumExecs() int64 {
return atomic.LoadInt64(&s.numExecs)
}
// Value state returns state value
func (s *state) Value() int64 {
return atomic.LoadInt64(&s.value)
}
// IsActive returns true if WorkerProcess not Inactive or Stopped
func (s *state) IsActive() bool {
val := s.Value()
return val == StateWorking || val == StateReady
}
// change state value (status)
func (s *state) Set(value int64) {
atomic.StoreInt64(&s.value, value)
}
// register new execution atomically
func (s *state) RegisterExec() {
atomic.AddInt64(&s.numExecs, 1)
}
// Update last used time
func (s *state) SetLastUsed(lu uint64) {
atomic.StoreUint64(&s.lastUsed, lu)
}
func (s *state) LastUsed() uint64 {
return atomic.LoadUint64(&s.lastUsed)
}
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