Golang Conn.Rev方法代码示例

// Find possible addresses for cluster named name.
func lookup(b *doozer.Conn, name string) (as []string) {
	rev, err := b.Rev()
	if err != nil {
		panic(err)
	}

	path := "/ctl/ns/" + name
	names, err := b.Getdir(path, rev, 0, -1)
	if err == doozer.ErrNoEnt {
		return nil
	} else if err, ok := err.(*doozer.Error); ok && err.Err == doozer.ErrNoEnt {
		return nil
	} else if err != nil {
		panic(err)
	}

	path += "/"
	for _, name := range names {
		body, _, err := b.Get(path+name, &rev)
		if err != nil {
			panic(err)
		}
		as = append(as, string(body))
	}
	return as
}

// Find possible addresses for cluster named name.
func lookup(b *doozer.Conn, name string) (as []string) {
	rev, err := b.Rev()
	if err != nil {
		panic(err)
	}

	info, err := b.Walk("/ctl/ns/"+name+"/*", rev, 0, -1)
	if err != nil {
		panic(err)
	}
	for _, e := range info {
		as = append(as, string(e.Body))
	}
	return as
}

func Main(clusterName, self, buri, rwsk, rosk string, cl *doozer.Conn, udpConn net.PacketConn, listener, webListener net.Listener, pulseInterval, fillDelay, kickTimeout int64, hi int64) {
	listenAddr := listener.Addr().String()

	canWrite := make(chan bool, 1)
	in := make(chan consensus.Packet, 50)
	out := make(chan consensus.Packet, 50)

	st := store.New()
	pr := &proposer{
		seqns: make(chan int64, alpha),
		props: make(chan *consensus.Prop),
		st:    st,
	}

	calSrv := func(start int64) {
		go gc.Pulse(self, st.Seqns, pr, pulseInterval)
		go gc.Clean(st, hi, time.Tick(1e9))
		var m consensus.Manager
		m.Self = self
		m.DefRev = start
		m.Alpha = alpha
		m.In = in
		m.Out = out
		m.Ops = st.Ops
		m.PSeqn = pr.seqns
		m.Props = pr.props
		m.TFill = fillDelay
		m.Store = st
		m.Ticker = time.Tick(10e6)
		go m.Run()
	}

	if cl == nil { // we are the only node in a new cluster
		set(st, "/ctl/name", clusterName, store.Missing)
		set(st, "/ctl/node/"+self+"/addr", listenAddr, store.Missing)
		set(st, "/ctl/node/"+self+"/hostname", os.Getenv("HOSTNAME"), store.Missing)
		set(st, "/ctl/node/"+self+"/version", Version, store.Missing)
		set(st, "/ctl/cal/0", self, store.Missing)
		calSrv(<-st.Seqns)
		// Skip ahead alpha steps so that the registrar can provide a
		// meaningful cluster.
		for i := 0; i < alpha; i++ {
			st.Ops <- store.Op{1 + <-st.Seqns, store.Nop}
		}
		canWrite <- true
	} else {
		setC(cl, "/ctl/node/"+self+"/addr", listenAddr, store.Clobber)
		setC(cl, "/ctl/node/"+self+"/hostname", os.Getenv("HOSTNAME"), store.Clobber)
		setC(cl, "/ctl/node/"+self+"/version", Version, store.Clobber)

		rev, err := cl.Rev()
		if err != nil {
			panic(err)
		}

		stop := make(chan bool, 1)
		go follow(st, cl, rev+1, stop)

		errs := make(chan os.Error)
		go func() {
			e, ok := <-errs
			if ok {
				panic(e)
			}
		}()
		doozer.Walk(cl, rev, "/", cloner{st.Ops, cl}, errs)
		close(errs)
		st.Flush()

		ch, err := st.Wait(store.Any, rev+1)
		if err == nil {
			<-ch
		}

		go func() {
			n := activate(st, self, cl)
			calSrv(n)
			advanceUntil(cl, st.Seqns, n+alpha)
			stop <- true
			canWrite <- true
			if buri != "" {
				b, err := doozer.DialUri(buri, "")
				if err != nil {
					panic(err)
				}
				setC(
					b,
					"/ctl/ns/"+clusterName+"/"+self,
					listenAddr,
					store.Missing,
				)
			}
		}()
	}

	shun := make(chan string, 3) // sufficient for a cluster of 7
	go member.Clean(shun, st, pr)
	go server.ListenAndServe(listener, canWrite, st, pr, rwsk, rosk)

	if rwsk == "" && rosk == "" && webListener != nil {
//.........这里部分代码省略.........

func Main(clusterName, self, buri, rwsk, rosk string, cl *doozer.Conn, udpConn *net.UDPConn, listener, webListener net.Listener, pulseInterval, fillDelay, kickTimeout int64, hi int64) {
	listenAddr := listener.Addr().String()

	canWrite := make(chan bool, 1)
	in := make(chan consensus.Packet, 50)
	out := make(chan consensus.Packet, 50)

	st := store.New()
	pr := &proposer{
		seqns: make(chan int64, alpha),
		props: make(chan *consensus.Prop),
		st:    st,
	}

	calSrv := func(start int64) {
		go gc.Pulse(self, st.Seqns, pr, pulseInterval)
		go gc.Clean(st, hi, time.Tick(1e9))
		var m consensus.Manager
		m.Self = self
		m.DefRev = start
		m.Alpha = alpha
		m.In = in
		m.Out = out
		m.Ops = st.Ops
		m.PSeqn = pr.seqns
		m.Props = pr.props
		m.TFill = fillDelay
		m.Store = st
		m.Ticker = time.Tick(10e6)
		go m.Run()
	}

	hostname, err := os.Hostname()
	if err != nil {
		hostname = "unknown"
	}

	if cl == nil { // we are the only node in a new cluster
		set(st, "/ctl/name", clusterName, store.Missing)
		set(st, "/ctl/node/"+self+"/addr", listenAddr, store.Missing)
		set(st, "/ctl/node/"+self+"/hostname", hostname, store.Missing)
		set(st, "/ctl/node/"+self+"/version", Version, store.Missing)
		set(st, "/ctl/cal/0", self, store.Missing)
		if buri == "" {
			set(st, "/ctl/ns/"+clusterName+"/"+self, listenAddr, store.Missing)
		}
		calSrv(<-st.Seqns)
		// Skip ahead alpha steps so that the registrar can provide a
		// meaningful cluster.
		for i := 0; i < alpha; i++ {
			st.Ops <- store.Op{1 + <-st.Seqns, store.Nop}
		}
		canWrite <- true
		go setReady(pr, self)
	} else {
		setC(cl, "/ctl/node/"+self+"/addr", listenAddr, store.Clobber)
		setC(cl, "/ctl/node/"+self+"/hostname", hostname, store.Clobber)
		setC(cl, "/ctl/node/"+self+"/version", Version, store.Clobber)

		rev, err := cl.Rev()
		if err != nil {
			panic(err)
		}

		stop := make(chan bool, 1)
		go follow(st, cl, rev+1, stop)

		errs := make(chan error)
		go func() {
			e, ok := <-errs
			if ok {
				panic(e)
			}
		}()
		doozer.Walk(cl, rev, "/", cloner{st.Ops, cl, rev}, errs)
		close(errs)
		st.Flush()

		ch, err := st.Wait(store.Any, rev+1)
		if err == nil {
			<-ch
		}

		go func() {
			n := activate(st, self, cl)
			calSrv(n)
			advanceUntil(cl, st.Seqns, n+alpha)
			stop <- true
			canWrite <- true
			go setReady(pr, self)
			if buri != "" {
				b, err := doozer.DialUri(buri, "")
				if err != nil {
					panic(err)
				}
				setC(
					b,
					"/ctl/ns/"+clusterName+"/"+self,
					listenAddr,
					store.Missing,
//.........这里部分代码省略.........

func Main(clusterName, self, buri, secret string, cl *doozer.Conn, udpConn net.PacketConn, listener, webListener net.Listener, pulseInterval, fillDelay, kickTimeout int64) {
	listenAddr := listener.Addr().String()

	canWrite := make(chan bool, 1)
	in := make(chan consensus.Packet, 50)
	out := make(chan consensus.Packet, 50)

	st := store.New()
	pr := &proposer{
		seqns: make(chan int64, alpha),
		props: make(chan *consensus.Prop),
		st:    st,
	}

	calSrv := func(start int64) {
		go gc.Pulse(self, st.Seqns, pr, pulseInterval)
		go gc.Clean(st, 360000, time.Tick(1e9))
		consensus.NewManager(self, start, alpha, in, out, st.Ops, pr.seqns, pr.props, fillDelay, st)
	}

	if cl == nil { // we are the only node in a new cluster
		set(st, "/ctl/name", clusterName, store.Missing)
		set(st, "/ctl/node/"+self+"/addr", listenAddr, store.Missing)
		set(st, "/ctl/node/"+self+"/hostname", os.Getenv("HOSTNAME"), store.Missing)
		set(st, "/ctl/node/"+self+"/version", Version, store.Missing)
		set(st, "/ctl/cal/0", self, store.Missing)
		calSrv(<-st.Seqns)
		// Skip ahead alpha steps so that the registrar can provide a
		// meaningful cluster.
		for i := 0; i < alpha; i++ {
			st.Ops <- store.Op{1 + <-st.Seqns, store.Nop}
		}
		canWrite <- true
	} else {
		setC(cl, "/ctl/node/"+self+"/addr", listenAddr, store.Clobber)
		setC(cl, "/ctl/node/"+self+"/hostname", os.Getenv("HOSTNAME"), store.Clobber)
		setC(cl, "/ctl/node/"+self+"/version", Version, store.Clobber)

		rev, err := cl.Rev()
		if err != nil {
			panic(err)
		}

		stop := make(chan bool, 1)
		go follow(st, cl, rev+1, stop)

		info, err := cl.Walk("/**", rev, 0, -1)
		if err != nil {
			panic(err)
		}
		for _, ev := range info {
			// store.Clobber is okay here because the event
			// has already passed through another store
			mut := store.MustEncodeSet(ev.Path, string(ev.Body), store.Clobber)
			st.Ops <- store.Op{ev.Rev, mut}
		}
		st.Flush()

		ch, err := st.Wait(store.Any, rev+1)
		if err == nil {
			<-ch
		}

		go func() {
			n := activate(st, self, cl)
			calSrv(n)
			advanceUntil(cl, st.Seqns, n+alpha)
			stop <- true
			canWrite <- true
			if buri != "" {
				b, err := doozer.DialUri(buri)
				if err != nil {
					panic(err)
				}
				setC(
					b,
					"/ctl/ns/"+clusterName+"/"+self,
					listenAddr,
					store.Missing,
				)
			}
		}()
	}

	shun := make(chan string, 3) // sufficient for a cluster of 7
	go member.Clean(shun, st, pr)
	go server.ListenAndServe(listener, canWrite, st, pr, secret)

	if secret == "" && webListener != nil {
		web.Store = st
		web.ClusterName = clusterName
		go web.Serve(webListener)
	}

	go func() {
		for p := range out {
			addr, err := net.ResolveUDPAddr(p.Addr)
			if err != nil {
				log.Println(err)
				continue
//.........这里部分代码省略.........