func (c *MonitorCommand) Run(args []string, ui cli.Ui) int {
var logLevel string
cmdFlags := flag.NewFlagSet("monitor", flag.ContinueOnError)
cmdFlags.Usage = func() { ui.Output(c.Help()) }
cmdFlags.StringVar(&logLevel, "log-level", "INFO", "log level")
rpcAddr := RPCAddrFlag(cmdFlags)
if err := cmdFlags.Parse(args); err != nil {
return 1
}
client, err := RPCClient(*rpcAddr)
if err != nil {
ui.Error(fmt.Sprintf("Error connecting to Serf agent: %s", err))
return 1
}
defer client.Close()
eventCh := make(chan string)
doneCh := make(chan struct{})
if err := client.Monitor(logutils.LogLevel(logLevel), eventCh, doneCh); err != nil {
ui.Error(fmt.Sprintf("Error starting monitor: %s", err))
return 1
}
eventDoneCh := make(chan struct{})
go func() {
defer close(eventDoneCh)
for e := range eventCh {
ui.Info(e)
}
c.lock.Lock()
defer c.lock.Unlock()
if !c.quitting {
ui.Info("")
ui.Output("Remote side ended the monitor! This usually means that the\n" +
"remote side has exited or crashed.")
}
}()
select {
case <-eventDoneCh:
return 1
case <-c.ShutdownCh:
c.lock.Lock()
c.quitting = true
c.lock.Unlock()
}
close(doneCh)
return 0
}
