Golang Message.Marshal方法代碼示例

func mustMarshalMsg(t *testing.T, m raftpb.Message) []byte {
	json, err := m.Marshal()
	if err != nil {
		t.Fatalf("error marshalling raft Message: %#v", err)
	}
	return json
}

func send(p Peers, m raftpb.Message) {
	// TODO (xiangli): reasonable retry logic
	for i := 0; i < 3; i++ {
		url := p.Pick(m.To)
		if url == "" {
			// TODO: unknown peer id.. what do we do? I
			// don't think his should ever happen, need to
			// look into this further.
			log.Printf("etcdhttp: no addr for %d", m.To)
			return
		}

		url += raftPrefix

		// TODO: don't block. we should be able to have 1000s
		// of messages out at a time.
		data, err := m.Marshal()
		if err != nil {
			log.Println("etcdhttp: dropping message:", err)
			return // drop bad message
		}
		if httpPost(url, data) {
			return // success
		}
		// TODO: backoff
	}
}

func send(c *http.Client, cls ClusterStore, m raftpb.Message) {
	// TODO (xiangli): reasonable retry logic
	for i := 0; i < 3; i++ {
		u := cls.Get().Pick(m.To)
		if u == "" {
			// TODO: unknown peer id.. what do we do? I
			// don't think his should ever happen, need to
			// look into this further.
			log.Printf("etcdhttp: no addr for %d", m.To)
			return
		}

		u = fmt.Sprintf("%s%s", u, raftPrefix)

		// TODO: don't block. we should be able to have 1000s
		// of messages out at a time.
		data, err := m.Marshal()
		if err != nil {
			log.Println("etcdhttp: dropping message:", err)
			return // drop bad message
		}
		if httpPost(c, u, data) {
			return // success
		}
		// TODO: backoff
	}
}

func (n *node) send(m raftpb.Message) {
	x.AssertTruef(n.id != m.To, "Seding message to itself")
	data, err := m.Marshal()
	x.Check(err)
	if m.Type != raftpb.MsgHeartbeat && m.Type != raftpb.MsgHeartbeatResp {
		fmt.Printf("\t\tSENDING: %v %v-->%v\n", m.Type, m.From, m.To)
	}
	select {
	case n.messages <- sendmsg{to: m.To, data: data}:
		// pass
	default:
		log.Fatalf("Unable to push messages to channel in send")
	}
}

func (t *tcpTransport) send(msg pb.Message) error {
	data, err := msg.Marshal()
	if err != nil {
		fmt.Fprint(os.Stdout, "marshal message err:", err)
		return err
	}
	fmt.Println(msg)
	p := GenPacket(data)
	fmt.Println(len(p))
	n, err := t.peerC[msg.To].Write(p)
	if err != nil {
		fmt.Fprintf(os.Stdout, "socket write data err:%s\n", err.Error())
		return err
	}
	if n != 4+len(data) {
		fmt.Fprintln(os.Stdout, "write data short", n, 4+len(data))
		return ErrShortPacket
	}
	fmt.Fprint(os.Stdout, msg.From, "--->", msg.To, "\n")
	return nil
}

func (rn *raftNetwork) send(m raftpb.Message) {
	rn.mu.Lock()
	to := rn.recvQueues[m.To]
	if rn.disconnected[m.To] {
		to = nil
	}
	drop := rn.dropmap[conn{m.From, m.To}]
	dl := rn.delaymap[conn{m.From, m.To}]
	rn.mu.Unlock()

	if to == nil {
		return
	}
	if drop != 0 && rand.Float64() < drop {
		return
	}
	// TODO: shall we dl without blocking the send call?
	if dl.d != 0 && rand.Float64() < dl.rate {
		rd := rand.Int63n(int64(dl.d))
		time.Sleep(time.Duration(rd))
	}

	// use marshal/unmarshal to copy message to avoid data race.
	b, err := m.Marshal()
	if err != nil {
		panic(err)
	}

	var cm raftpb.Message
	err = cm.Unmarshal(b)
	if err != nil {
		panic(err)
	}

	select {
	case to <- cm:
	default:
		// drop messages when the receiver queue is full.
	}
}

// send uses the given client to send a message to a member in the given
// ClusterStore, retrying up to 3 times for each message. The given
// ServerStats and LeaderStats are updated appropriately
func send(c *http.Client, cl *Cluster, m raftpb.Message, ss *stats.ServerStats, ls *stats.LeaderStats) {
	cid := cl.ID()
	// TODO (xiangli): reasonable retry logic
	for i := 0; i < 3; i++ {
		memb := cl.Member(m.To)
		if memb == nil {
			// TODO: unknown peer id.. what do we do? I
			// don't think his should ever happen, need to
			// look into this further.
			log.Printf("etcdhttp: no member for %d", m.To)
			return
		}
		u := fmt.Sprintf("%s%s", memb.PickPeerURL(), raftPrefix)

		// TODO: don't block. we should be able to have 1000s
		// of messages out at a time.
		data, err := m.Marshal()
		if err != nil {
			log.Println("etcdhttp: dropping message:", err)
			return // drop bad message
		}
		if m.Type == raftpb.MsgApp {
			ss.SendAppendReq(len(data))
		}
		to := strutil.IDAsHex(m.To)
		fs := ls.Follower(to)

		start := time.Now()
		sent := httpPost(c, u, cid, data)
		end := time.Now()
		if sent {
			fs.Succ(end.Sub(start))
			return
		}
		fs.Fail()
		// TODO: backoff
	}
}