Exemplo n.º 1
0
// Bootstrap kicks off IpfsNode bootstrapping. This function will periodically
// check the number of open connections and -- if there are too few -- initiate
// connections to well-known bootstrap peers. It also kicks off subsystem
// bootstrapping (i.e. routing).
func Bootstrap(n *IpfsNode, cfg BootstrapConfig) (io.Closer, error) {

	// make a signal to wait for one bootstrap round to complete.
	doneWithRound := make(chan struct{})

	// the periodic bootstrap function -- the connection supervisor
	periodic := func(worker goprocess.Process) {
		ctx := procctx.OnClosingContext(worker)
		defer log.EventBegin(ctx, "periodicBootstrap", n.Identity).Done()

		if err := bootstrapRound(ctx, n.PeerHost, cfg); err != nil {
			log.Event(ctx, "bootstrapError", n.Identity, lgbl.Error(err))
			log.Debugf("%s bootstrap error: %s", n.Identity, err)
		}

		<-doneWithRound
	}

	// kick off the node's periodic bootstrapping
	proc := periodicproc.Tick(cfg.Period, periodic)
	proc.Go(periodic) // run one right now.

	// kick off Routing.Bootstrap
	if n.Routing != nil {
		ctx := procctx.OnClosingContext(proc)
		if err := n.Routing.Bootstrap(ctx); err != nil {
			proc.Close()
			return nil, err
		}
	}

	doneWithRound <- struct{}{}
	close(doneWithRound) // it no longer blocks periodic
	return proc, nil
}
Exemplo n.º 2
0
func ExampleTick() {
	p := periodicproc.Tick(time.Second, func(proc goprocess.Process) {
		fmt.Println("tick")
	})

	<-time.After(3*time.Second + 500*time.Millisecond)
	p.Close()

	// Output:
	// tick
	// tick
	// tick
}