func (App) Open(filepath string) circuit.X {
f, err := os.Open(filepath)
if err != nil {
return nil
}
circuit.RunInBack(func() { time.Sleep(5 * time.Second) })
return circuit.Ref(file.NewFileServer(f))
}
// StartReducer.Start is a worker function that initializes a new Reducer and
// returns a cross-runtime pointer to it
func (StartReducer) Start() circuit.X {
r := &Reducer{} // Create a new reducer object
r.m = make(map[int64]*Post) // Create the map holding the posts, indexed by ID
circuit.Listen("reducer-service", r) // Register Reducer as public service that can be accessed on this worker
circuit.Daemonize(func() {
r.maintainTop() // Start a background goroutine that maintains the top ten posts on this reducer
})
return circuit.Ref(r) // Make the pointer to the Reducer object exportable and return it
}
func (StartReducer) Start() circuit.X {
r := &Reducer{}
r.m = make(map[int64]*SlidingPost)
r.rank = llrb.New(SlidingPostLess)
circuit.Listen("reducer-service", r)
circuit.Daemonize(func() {
r.maintainTop()
})
return circuit.Ref(r)
}
// JailTail opens a file within this worker's jail directory and prepares a
// cross-circuit pointer to the open file
func (a *Acid) JailTail(jailFile string) (circuit.X, error) {
abs := path.Join(config.Config.Deploy.JailDir(), circuit.WorkerAddr().WorkerID().String(), jailFile)
cmd := exec.Command("/bin/sh", "-c", "tail -f "+abs)
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, circuit.FlattenError(err)
}
if err = cmd.Start(); err != nil {
return nil, circuit.FlattenError(err)
}
return circuit.Ref(teleio.NewServer(&tailStdout{stdout, cmd})), nil
}
func spark(ch chan int) {
d := &worker.Dummy{}
runtime.SetFinalizer(d, func(h *worker.Dummy) {
println("finalizing dummy")
close(ch)
})
defer runtime.GC()
// Test:
// Spawn a worker and pass an x-pointer to it;
// Worker proceeds to die right away;
// Check that finalizer of local dummy called when local runtime notices remote is dead
_, addr, err := circuit.Spawn("localhost", []string{"/xgc"}, worker.Start{}, circuit.Ref(d))
if err != nil {
panic(err)
}
println(addr.String())
}
