func (r region) communicate() {
//collect region statistics
ticker := time.NewTicker(5 * time.Second)
//object holding process reference
var exe *exec.Cmd
exe = nil
var start time.Time
var proc *process.Process
//process communication
terminated := make(chan bool)
for {
select {
case <-terminated:
//the process exited for some Reason
exe = nil
case cmd := <-r.cmds:
switch cmd.command {
case "start":
//if already running, exit
if exe != nil {
r.log.Error("Region is already running", r.UUID)
continue
}
//execute binaries
os.Chdir(r.dir)
cmdName := "/usr/bin/mono"
cmdArgs := []string{"OpenSim.exe", "-console", "rest"}
exe = exec.Command(cmdName, cmdArgs...)
err := exe.Start()
if err != nil {
errMsg := fmt.Sprintf("Error starting process: %s", err.Error())
r.log.Error(errMsg)
continue
}
r.log.Info("Started Successfully")
start = time.Now()
proc, _ = process.NewProcess(int32(exe.Process.Pid))
go func() {
//wait for process, ignoring process-specific errors
_ = exe.Wait()
r.log.Error("Terminated")
exe = nil
terminated <- true
}()
case "kill":
//if not running, exit
if exe == nil {
errMsg := fmt.Sprintf("Kill region %v failed, region is not running", r.UUID.String())
r.log.Error(errMsg)
continue
}
if err := exe.Process.Kill(); err != nil {
errMsg := fmt.Sprintf("Error killing process: %s", err.Error())
r.log.Error(errMsg)
}
default:
r.log.Info("Received unexpected command: %v", cmd.command)
}
case <-ticker.C:
stat := mgm.RegionStat{UUID: r.UUID}
if exe == nil {
//trivially halted if we never started
r.rStat <- stat
continue
}
stat.Running = true
cpuPercent, err := proc.CPUPercent(0)
if err != nil {
errMsg := fmt.Sprintf("Error getting cpu for pid: %s", err.Error())
r.log.Error(errMsg)
} else {
stat.CPUPercent = cpuPercent
}
//memory info from this module may not be correct....
memInfo, err := proc.MemoryInfo()
if err != nil {
errMsg := fmt.Sprintf("Error getting memory for pid: %s", err.Error())
r.log.Error(errMsg)
} else {
stat.MemKB = (float64(memInfo.RSS) / 1024.0)
}
elapsed := time.Since(start)
stat.Uptime = elapsed
r.rStat <- stat
}
}
}
