func getSerialisedInstance(
app, proc string,
id int64,
status InsStatus,
sp cp.Snapshot,
) (*Instance, error) {
var (
i = &Instance{
ID: id,
AppName: app,
ProcessName: proc,
dir: cp.NewDir(instancePath(id), sp),
}
c = &cp.JsonCodec{
DecodedVal: i,
}
)
_, err := sp.GetFile(i.procStatusPath(status), c)
if err != nil {
return nil, errorf(err, "fetching instance %d: %s", id, err)
}
return i, nil
}
func claimNextPort(s cp.Snapshot) (int, error) {
for {
var err error
s, err = s.FastForward()
if err != nil {
return -1, err
}
f, err := s.GetFile(nextPortPath, new(cp.IntCodec))
if err == nil {
port := f.Value.(int)
f, err = f.Set(port + 1)
if err == nil {
return port, nil
}
time.Sleep(time.Second / 10)
} else {
return -1, err
}
}
}