Example #1
0
// Creates a new server.
func New(path, listen string) (*Server, error) {
	sqlPath := filepath.Join(path, "storage.sql")
	util.EnsureAbsent(sqlPath)

    s := &Server{
    	received: make(map[string]bool),
		path:    path,
		listen:  listen,
		sql:     sql.NewSQL(sqlPath),
		router:  mux.NewRouter(),
		client:  transport.NewClient(),
	}

	// Read existing name or generate a new one.
	if b, err := ioutil.ReadFile(filepath.Join(path, "name")); err == nil {
		s.name = string(b)
	} else {
		s.name = fmt.Sprintf("%07x", rand.Int())[0:7]
		if err = ioutil.WriteFile(filepath.Join(path, "name"), []byte(s.name), 0644); err != nil {
			panic(err)
		}
	}

	return s, nil
}
Example #2
0
// Creates a new server.
func New(path, listen string) (*Server, error) {
	s := &Server{
		name:   listen,
		path:   path,
		listen: listen,
		sql:    sql.NewSQL(),
		router: mux.NewRouter(),
		client: transport.NewClient(),
	}

	return s, nil
}
// Creates a new HTTP transporter with the given path prefix.
func NewHTTPTransporter(prefix string) *HTTPTransporter {
	cli := transport.NewClient()
	t := &HTTPTransporter{
		DisableKeepAlives:    false,
		prefix:               prefix,
		appendEntriesPath:    joinPath(prefix, "/appendEntries"),
		requestVotePath:      joinPath(prefix, "/requestVote"),
		snapshotPath:         joinPath(prefix, "/snapshot"),
		snapshotRecoveryPath: joinPath(prefix, "/snapshotRecovery"),
		Transport:            &http.Transport{},
		client:               cli,
		httpClient:           cli.Internal(),
	}
	return t
}
Example #4
0
// Creates a new server.
func New(path, listen string) (*Server, error) {
	s := &Server{
		name:         listen,
		path:         path,
		listen:       listen,
		router:       mux.NewRouter(),
		client:       transport.NewClient(),
		db:           NewDB(path),
		outstanding:  NewOutstanding(),
		joined:       false,
		leaderNotify: make(chan string, 1000),
	}

	return s, nil
}
Example #5
0
// Creates a new server.
func New(path, listen string) (*Server, error) {
	sqlPath := filepath.Join(path, "storage.sql")
	util.EnsureAbsent(sqlPath)

	s := &Server{
		name:   listen,
		path:   path,
		listen: listen,
		sql:    sql.NewSQL(sqlPath),
		router: mux.NewRouter(),
		client: transport.NewClient(),
	}

	return s, nil
}
Example #6
0
// Creates a new server.
func New(path, listen string) (*Server, error) {
	cs, err := transport.Encode(listen)
	if err != nil {
		return nil, err
	}

	sqlPath := filepath.Join(path, "storage.sql")
	util.EnsureAbsent(sqlPath)

	s := &Server{
		path:    path,
		listen:  listen,
		sql:     sql.NewSQL(sqlPath),
		router:  mux.NewRouter(),
		client:  transport.NewClient(),
		cluster: NewCluster(path, cs),
	}

	return s, nil
}
Example #7
0
// Creates a new server.
func New(path, listen string) (*Server, error) {
	cs, err := transport.Encode(listen)
	if err != nil {
		return nil, err
	}
	log.Printf("My connection string is %s", cs)

	sqlPath := filepath.Join(path, "storage.sql")
	util.EnsureAbsent(sqlPath)

	s := &Server{
		path:              path,
		name:              strings.Replace(listen, "/", "-", -1),
		listen:            listen,
		connection_string: cs,
		sql:               sql.NewSQL(sqlPath),
		router:            mux.NewRouter(),
		client:            transport.NewClient(),
	}

	return s, nil
}
Example #8
0
// Creates a new server.
func New(path, listen, join string) (*Server, error) {
	cs, err := transport.Encode(listen)
	if err != nil {
		return nil, err
	}

	sqlPath := filepath.Join(path, "storage.sql")
	util.EnsureAbsent(sqlPath)

	s := &Server{
		path:             path,
		listen:           listen,
		name:             path,
		connectionString: cs,
		sql:              sql.NewSQL(sqlPath),
		router:           mux.NewRouter(),
		client:           transport.NewClient(),
		execCommand:      make(chan *ExecCommand),
	}

	return s, nil
}
Example #9
0
// Creates a new server.
func New(path, listen string) (*Server, error) {

	cs, err := transport.Encode(listen)
	if err != nil {
		return nil, err
	}

	log.Printf("Starting server at" + cs)

	sqlPath := filepath.Join(path, "storage.sql")
	util.EnsureAbsent(sqlPath)

	s := &Server{
		path:   path,
		listen: listen,
		sql:    sql.NewSQL(sqlPath),
		router: mux.NewRouter(),
		client: transport.NewClient(),
		block:  false,
	}

	return s, nil
}
Example #10
0
// Starts the server.
func (s *Server) ListenAndServe(primary string) error {
	var err error

	rand.Seed(int64(time.Now().Nanosecond()))

	s.primary = primary
	s.name = "name-" + s.listen

	raft.RegisterCommand(&BatchCommand{})

	// Initialize and start HTTP server.
	s.httpServer = &http.Server{
		Handler: s.router,
	}

	httpTransport := transport.NewClient().GetHTTPClient()

	//log.Printf(("Initializing Raft Server")
	transporter := NewHTTPTransporter("/raft", *httpTransport)
	s.raftServer, err = raft.NewServer(s.name, s.path, transporter, nil, s.db, "")
	if err != nil {
		log.Fatal(err)
	}
	transporter.Install(s.raftServer, s)
	s.raftServer.Start()

	s.raftServer.SetElectionTimeout(400 * time.Millisecond)

	s.raftServer.AddEventListener("addPeer", func(e raft.Event) {
		//log.Printf("Joined!")
		s.joined = true
	})

	s.raftServer.AddEventListener("leaderChange", func(e raft.Event) {
		leader := e.Value().(string)

		if leader == s.name {
			//log.Printf("Leader Changed to %v", leader)

			s.leaderNotify <- leader
		}
	})

	if primary == "" {
		cs, err := transport.Encode(s.listen)

		if err != nil {
			log.Fatal(err)
		}

		//log.Printf(("Starting as Leader")
		_, err = s.raftServer.Do(&raft.DefaultJoinCommand{
			Name:             s.raftServer.Name(),
			ConnectionString: cs,
		})
		//log.Printf(("I am Leader")

		if err != nil {
			log.Fatal(err)
		}
	} else {
		//log.Printf("Waiting 100 milliseconds to join Primary")
		time.AfterFunc(10*time.Millisecond, func() {
			maxTries := 25
			tries := 0
			for !s.joined {
				//log.Printf("Trying to Join")
				tries++
				//log.Printf("Attempting to Join")
				s.Join(primary)
				// if err != nil {
				// 	//log.Printf("Failed to join")
				// } else {
				// 	//log.Printf("Joined!")
				// 	break
				// }

				if tries > maxTries {
					log.Fatal("Could not join!")
				}

				time.Sleep(JOIN_TIMEOUT)
			}
		})
	}

	s.router.HandleFunc("/sql", s.sqlHandler).Methods("POST")
	s.router.HandleFunc("/healthcheck", s.healthcheckHandler).Methods("GET")
	s.router.HandleFunc("/join", s.joinHandler).Methods("POST")
	s.router.HandleFunc("/forward", s.forwardHandler).Methods("POST")

	// Start Unix transport
	l, err := transport.Listen(s.listen)
	if err != nil {
		log.Fatal(err)
	}

	//log.Printf(("Serving?")

	go s.healthChecker()
	go s.processQueue()
	go s.processNotifications()
	s.httpServer.Serve(l)
	return nil
}