Пример #1
0
func (mon *SlaveMonitor) slaveDidBeginRegistration(fd int) {
	// Having just started the process, we expect an IO, which we convert to a UNIX domain socket
	fileName := strconv.Itoa(rand.Int())
	slaveFile := os.NewFile(uintptr(fd), fileName)
	slaveUsock, err := unixsocket.NewFromFile(slaveFile)
	if err != nil {
		slog.Error(err)
	}

	// We now expect the slave to use this fd they send us to send a Pid&Identifier Message
	msg, err := slaveUsock.ReadMessage()
	if err != nil {
		slog.Error(err)
	}
	pid, identifier, err := messages.ParsePidMessage(msg)

	// And the last step before executing its action, the slave sends us a pipe it will later use to
	// send us all the features it's loaded.
	featurePipeFd, err := slaveUsock.ReadFD()
	if err != nil {
		slog.Error(err)
	}

	slaveNode := mon.tree.FindSlaveByName(identifier)
	if slaveNode == nil {
		Error("slavemonitor.go:slaveDidBeginRegistration:Unknown identifier:" + identifier)
	}

	slaveNode.SlaveWasInitialized(pid, slaveUsock, featurePipeFd)
}
Пример #2
0
func receivePidFromCommand(commandUsock *unixsocket.Usock, err error) (int, error) {
	if err != nil {
		return -1, err
	}

	msg, err := commandUsock.ReadMessage()
	if err != nil {
		return -1, err
	}
	intPid, _, _ := messages.ParsePidMessage(msg)

	return intPid, err
}