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|
package interrupt_handler
import (
"os"
"os/signal"
"sync"
"syscall"
"time"
"github.com/onsi/ginkgo/v2/internal/parallel_support"
)
var ABORT_POLLING_INTERVAL = 500 * time.Millisecond
type InterruptCause uint
const (
InterruptCauseInvalid InterruptCause = iota
InterruptCauseSignal
InterruptCauseAbortByOtherProcess
)
type InterruptLevel uint
const (
InterruptLevelUninterrupted InterruptLevel = iota
InterruptLevelCleanupAndReport
InterruptLevelReportOnly
InterruptLevelBailOut
)
func (ic InterruptCause) String() string {
switch ic {
case InterruptCauseSignal:
return "Interrupted by User"
case InterruptCauseAbortByOtherProcess:
return "Interrupted by Other Ginkgo Process"
}
return "INVALID_INTERRUPT_CAUSE"
}
type InterruptStatus struct {
Channel chan interface{}
Level InterruptLevel
Cause InterruptCause
}
func (s InterruptStatus) Interrupted() bool {
return s.Level != InterruptLevelUninterrupted
}
func (s InterruptStatus) Message() string {
return s.Cause.String()
}
func (s InterruptStatus) ShouldIncludeProgressReport() bool {
return s.Cause != InterruptCauseAbortByOtherProcess
}
type InterruptHandlerInterface interface {
Status() InterruptStatus
}
type InterruptHandler struct {
c chan interface{}
lock *sync.Mutex
level InterruptLevel
cause InterruptCause
client parallel_support.Client
stop chan interface{}
signals []os.Signal
requestAbortCheck chan interface{}
}
func NewInterruptHandler(client parallel_support.Client, signals ...os.Signal) *InterruptHandler {
if len(signals) == 0 {
signals = []os.Signal{os.Interrupt, syscall.SIGTERM}
}
handler := &InterruptHandler{
c: make(chan interface{}),
lock: &sync.Mutex{},
stop: make(chan interface{}),
requestAbortCheck: make(chan interface{}),
client: client,
signals: signals,
}
handler.registerForInterrupts()
return handler
}
func (handler *InterruptHandler) Stop() {
close(handler.stop)
}
func (handler *InterruptHandler) registerForInterrupts() {
// os signal handling
signalChannel := make(chan os.Signal, 1)
signal.Notify(signalChannel, handler.signals...)
// cross-process abort handling
var abortChannel chan interface{}
if handler.client != nil {
abortChannel = make(chan interface{})
go func() {
pollTicker := time.NewTicker(ABORT_POLLING_INTERVAL)
for {
select {
case <-pollTicker.C:
if handler.client.ShouldAbort() {
close(abortChannel)
pollTicker.Stop()
return
}
case <-handler.requestAbortCheck:
if handler.client.ShouldAbort() {
close(abortChannel)
pollTicker.Stop()
return
}
case <-handler.stop:
pollTicker.Stop()
return
}
}
}()
}
go func(abortChannel chan interface{}) {
var interruptCause InterruptCause
for {
select {
case <-signalChannel:
interruptCause = InterruptCauseSignal
case <-abortChannel:
interruptCause = InterruptCauseAbortByOtherProcess
case <-handler.stop:
signal.Stop(signalChannel)
return
}
abortChannel = nil
handler.lock.Lock()
oldLevel := handler.level
handler.cause = interruptCause
if handler.level == InterruptLevelUninterrupted {
handler.level = InterruptLevelCleanupAndReport
} else if handler.level == InterruptLevelCleanupAndReport {
handler.level = InterruptLevelReportOnly
} else if handler.level == InterruptLevelReportOnly {
handler.level = InterruptLevelBailOut
}
if handler.level != oldLevel {
close(handler.c)
handler.c = make(chan interface{})
}
handler.lock.Unlock()
}
}(abortChannel)
}
func (handler *InterruptHandler) Status() InterruptStatus {
handler.lock.Lock()
status := InterruptStatus{
Level: handler.level,
Channel: handler.c,
Cause: handler.cause,
}
handler.lock.Unlock()
if handler.client != nil && handler.client.ShouldAbort() && !status.Interrupted() {
close(handler.requestAbortCheck)
<-status.Channel
return handler.Status()
}
return status
}
|
