Exemplo n.º 1
0
//
// Bootstrp
//
func (s *Server) bootstrap() (err error) {

	// Initialize server state
	s.state = newServerState()

	// Initialize repository service
	s.repo, err = r.OpenRepository()
	if err != nil {
		return err
	}
	s.log = r.NewCommitLog(s.repo)
	s.srvConfig = r.NewServerConfig(s.repo)

	// Create and initialize new txn state.
	s.txn = common.NewTxnState()

	// initialize the current transaction id to the lastLoggedTxid.  This
	// is the txid that this node has seen so far.  If this node becomes
	// the leader, a new epoch will be used and new current txid will
	// be generated. So no need to initialize the epoch at this point.
	lastLoggedTxid, err := s.srvConfig.GetLastLoggedTxnId()
	if err != nil {
		return err
	}
	s.txn.InitCurrentTxnid(common.Txnid(lastLoggedTxid))

	// Initialize various callback facility for leader election and
	// voting protocol.
	s.factory = message.NewConcreteMsgFactory()
	s.handler = action.NewServerAction(s.repo, s.log, s.srvConfig, s, s.txn, s.factory, s)
	s.skillch = make(chan bool, 1) // make it buffered to unblock sender
	s.site = nil

	// Need to start the peer listener before election. A follower may
	// finish its election before a leader finishes its election. Therefore,
	// a follower node can request a connection to the leader node before that
	// node knows it is a leader.  By starting the listener now, it allows the
	// follower to establish the connection and let the leader handles this
	// connection at a later time (when it is ready to be a leader).
	s.listener, err = common.StartPeerListener(GetHostTCPAddr())
	if err != nil {
		return common.WrapError(common.SERVER_ERROR, "Fail to start PeerListener.", err)
	}

	// Start a request listener.
	s.reqListener, err = StartRequestListener(GetHostRequestAddr(), s)
	if err != nil {
		return common.WrapError(common.SERVER_ERROR, "Fail to start RequestListener.", err)
	}

	return nil
}
Exemplo n.º 2
0
func (s *fakeServer) bootstrap() (err error) {

	// Initialize repository service
	s.repo, err = repo.OpenRepository()
	if err != nil {
		return err
	}

	s.txn = common.NewTxnState()
	s.factory = message.NewConcreteMsgFactory()
	s.handler = action.NewDefaultServerAction(s.repo, s, s.txn)
	s.killch = make(chan bool, 1) // make it buffered to unblock sender
	s.status = protocol.ELECTING

	return nil
}
Exemplo n.º 3
0
func newRemoteRepoRef(requestAddr string,
	leaderAddr string,
	config string,
	mgr *IndexManager) (*RemoteRepoRef, error) {

	// Initialize local repository
	repository, err := repo.OpenRepository()
	if err != nil {
		return nil, err
	}

	// This is a blocking call unit the watcher is ready.  This means
	// the watcher has succesfully synchronized with the remote metadata
	// repository.

	var watcherId string
	env, err := newEnv(config)
	if err == nil {
		watcherId = env.getHostElectionPort()
	} else {
		uuid, err := common.NewUUID()
		if err != nil {
			return nil, err
		}
		watcherId = strconv.FormatUint(uuid.Uint64(), 10)
	}

	watcher, err := startWatcher(mgr, repository, leaderAddr, watcherId)
	if err != nil {
		return nil, err
	}

	repoRef := &RemoteRepoRef{remoteReqAddr: requestAddr,
		repository: repository,
		watcher:    watcher}

	return repoRef, nil
}