Golang User.GetName方法代碼示例

func (self *Permissions) AuthorizeChangeDbUserPassword(user common.User, db string, targetUsername string) (ok bool, err common.AuthorizationError) {
	if !user.IsDbAdmin(db) && !(user.GetDb() == db && user.GetName() == targetUsername) {
		return false, common.NewAuthorizationError("Insufficient permissions to change db user password for %s on %s", targetUsername, db)
	}

	return true, ""
}

// Distributes the query across the cluster and combines the results. Yields as they come in ensuring proper order.
// TODO: make this work even if there is a downed server in the cluster
func (self *CoordinatorImpl) DistributeQuery(user common.User, db string, query *parser.SelectQuery, localOnly bool, yield func(*protocol.Series) error) error {
	if self.clusterConfiguration.IsSingleServer() || localOnly {
		return self.datastore.ExecuteQuery(user, db, query, yield, nil)
	}
	servers, replicationFactor := self.clusterConfiguration.GetServersToMakeQueryTo(&db)
	id := atomic.AddUint32(&self.requestId, uint32(1))
	userName := user.GetName()
	isDbUser := !user.IsClusterAdmin()
	responseChannels := make([]chan *protocol.Response, 0, len(servers)+1)
	queryString := query.GetQueryString()
	var localServerToQuery *serverToQuery
	for _, server := range servers {
		if server.server.Id == self.clusterConfiguration.localServerId {
			localServerToQuery = server
		} else {
			request := &protocol.Request{Type: &queryRequest, Query: &queryString, Id: &id, Database: &db, UserName: &userName, IsDbUser: &isDbUser}
			if server.ringLocationsToQuery != replicationFactor {
				r := server.ringLocationsToQuery
				request.RingLocationsToQuery = &r
			}
			responseChan := make(chan *protocol.Response, 3)
			server.server.MakeRequest(request, responseChan)
			responseChannels = append(responseChannels, responseChan)
		}
	}

	local := make(chan *protocol.Response)
	nextPointMap := make(map[string]*NextPoint)

	// TODO: this style of wrapping the series in response objects with the
	//       last point time is duplicated in the request handler. Refactor...
	sendFromLocal := func(series *protocol.Series) error {
		response := createResponse(nextPointMap, series, nil)
		local <- response
		return nil
	}
	responseChannels = append(responseChannels, local)
	// TODO: wire up the willreturnsingleseries method and uncomment this line and delete the next one.
	//	isSingleSeriesQuery := query.WillReturnSingleSeries()
	isSingleSeriesQuery := false

	go func() {
		var ringFilter func(database, series *string, time *int64) bool
		if replicationFactor != localServerToQuery.ringLocationsToQuery {
			ringFilter = self.clusterConfiguration.GetRingFilterFunction(db, localServerToQuery.ringLocationsToQuery)
		}
		self.datastore.ExecuteQuery(user, db, query, sendFromLocal, ringFilter)
		local <- &protocol.Response{Type: &endStreamResponse}
		close(local)
	}()
	self.streamResultsFromChannels(isSingleSeriesQuery, query.Ascending, responseChannels, yield)
	return nil
}

func (self *CoordinatorImpl) ListSeries(user common.User, database string) ([]*protocol.Series, error) {
	if self.clusterConfiguration.IsSingleServer() {
		dbs := []string{}
		self.datastore.GetSeriesForDatabase(database, func(db string) error {
			dbs = append(dbs, db)
			return nil
		})
		return seriesFromListSeries(dbs), nil
	}
	servers, replicationFactor := self.clusterConfiguration.GetServersToMakeQueryTo(&database)
	id := atomic.AddUint32(&self.requestId, uint32(1))
	userName := user.GetName()
	isDbUser := !user.IsClusterAdmin()
	responseChannels := make([]chan *protocol.Response, 0, len(servers)+1)
	for _, server := range servers {
		if server.server.Id == self.clusterConfiguration.localServerId {
			continue
		}
		request := &protocol.Request{Type: &listSeriesRequest, Id: &id, Database: &database, UserName: &userName, IsDbUser: &isDbUser}
		if server.ringLocationsToQuery != replicationFactor {
			r := server.ringLocationsToQuery
			request.RingLocationsToQuery = &r
		}
		responseChan := make(chan *protocol.Response, 3)
		server.server.protobufClient.MakeRequest(request, responseChan)
		responseChannels = append(responseChannels, responseChan)
	}

	local := make(chan *protocol.Response)

	responseChannels = append(responseChannels, local)

	go func() {
		dbs := []string{}
		self.datastore.GetSeriesForDatabase(database, func(db string) error {
			dbs = append(dbs, db)
			return nil
		})
		seriesArray := seriesFromListSeries(dbs)
		for _, series := range seriesArray {
			local <- &protocol.Response{Type: &listSeriesResponse, Series: series}
		}
		local <- &protocol.Response{Type: &endStreamResponse}
		close(local)
	}()
	seriesArray := []*protocol.Series{}
	self.streamResultsFromChannels(true, true, responseChannels, func(series *protocol.Series) error {
		seriesArray = append(seriesArray, series)
		return nil
	})
	return seriesArray, nil
}

func (self *CoordinatorImpl) ChangeDbUserPassword(requester common.User, db, username, password string) error {
	if !requester.IsClusterAdmin() && !requester.IsDbAdmin(db) && !(requester.GetDb() == db && requester.GetName() == username) {
		return common.NewAuthorizationError("Insufficient permissions")
	}

	hash, err := cluster.HashPassword(password)
	if err != nil {
		return err
	}
	return self.raftServer.ChangeDbUserPassword(db, username, hash)
}

func (self *CoordinatorImpl) RunQuery(user common.User, database string, queryString string, seriesWriter SeriesWriter) (err error) {
	log.Info("Query: db: %s, u: %s, q: %s", database, user.GetName(), queryString)
	// don't let a panic pass beyond RunQuery
	defer common.RecoverFunc(database, queryString, nil)

	q, err := parser.ParseQuery(queryString)
	if err != nil {
		return err
	}

	for _, query := range q {
		querySpec := parser.NewQuerySpec(user, database, query)

		if query.DeleteQuery != nil {
			if err := self.clusterConfiguration.CreateCheckpoint(); err != nil {
				return err
			}

			if err := self.runDeleteQuery(querySpec, seriesWriter); err != nil {
				return err
			}
			continue
		}

		if query.DropQuery != nil {
			if err := self.DeleteContinuousQuery(user, database, uint32(query.DropQuery.Id)); err != nil {
				return err
			}
			continue
		}

		if query.IsListQuery() {
			if query.IsListSeriesQuery() {
				self.runListSeriesQuery(querySpec, seriesWriter)
			} else if query.IsListContinuousQueriesQuery() {
				queries, err := self.ListContinuousQueries(user, database)
				if err != nil {
					return err
				}
				for _, q := range queries {
					if err := seriesWriter.Write(q); err != nil {
						return err
					}
				}
			}
			continue
		}

		if query.DropSeriesQuery != nil {
			err := self.runDropSeriesQuery(querySpec, seriesWriter)
			if err != nil {
				return err
			}
			continue
		}

		selectQuery := query.SelectQuery

		if selectQuery.IsContinuousQuery() {
			return self.CreateContinuousQuery(user, database, queryString)
		}
		if err := self.checkPermission(user, querySpec); err != nil {
			return err
		}
		return self.runQuery(querySpec, seriesWriter)
	}
	seriesWriter.Close()
	return nil
}

func (self *CoordinatorImpl) WriteSeriesData(user common.User, db string, series []*protocol.Series) error {
	// make sure that the db exist
	if !self.clusterConfiguration.DatabasesExists(db) {
		return fmt.Errorf("Database %s doesn't exist", db)
	}

	for _, s := range series {
		seriesName := s.GetName()
		if user.HasWriteAccess(seriesName) {
			continue
		}
		return common.NewAuthorizationError("User %s doesn't have write permissions for %s", user.GetName(), seriesName)
	}

	err := self.CommitSeriesData(db, series, false)
	if err != nil {
		return err
	}

	for _, s := range series {
		self.ProcessContinuousQueries(db, s)
	}

	return err
}

func (self *CoordinatorImpl) WriteSeriesData(user common.User, db string, series []*protocol.Series) error {
	for _, s := range series {
		seriesName := s.GetName()
		if user.HasWriteAccess(seriesName) {
			continue
		}
		return common.NewAuthorizationError("User %s doesn't have write permissions for %s", user.GetName(), seriesName)
	}

	err := self.CommitSeriesData(db, series, false)
	if err != nil {
		return err
	}

	for _, s := range series {
		self.ProcessContinuousQueries(db, s)
	}

	return err
}

func (self *CoordinatorImpl) ChangeDbUserPassword(requester common.User, db, username, password string) error {
	if !requester.IsClusterAdmin() && !requester.IsDbAdmin(db) && !(requester.GetDb() == db && requester.GetName() == username) {
		return fmt.Errorf("Insufficient permissions")
	}

	dbUsers := self.clusterConfiguration.dbUsers[db]
	if dbUsers == nil || dbUsers[username] == nil {
		return fmt.Errorf("Invalid username %s", username)
	}

	dbUsers[username].changePassword(password)
	return self.raftServer.SaveDbUser(dbUsers[username])
}

// Distributes the query across the cluster and combines the results. Yields as they come in ensuring proper order.
// TODO: make this work even if there is a downed server in the cluster
func (self *CoordinatorImpl) DistributeQuery(user common.User, db string, query *parser.SelectQuery, yield func(*protocol.Series) error) error {
	if self.clusterConfiguration.IsSingleServer() {
		return self.datastore.ExecuteQuery(user, db, query, yield, nil)
	}
	servers, replicationFactor := self.clusterConfiguration.GetServersToMakeQueryTo(self.localHostId, &db)
	queryString := query.GetQueryString()
	id := atomic.AddUint32(&self.requestId, uint32(1))
	userName := user.GetName()
	responseChannels := make([]chan *protocol.Response, 0, len(servers)+1)
	var localServerToQuery *serverToQuery
	for _, server := range servers {
		if server.server.Id == self.localHostId {
			localServerToQuery = server
		} else {
			request := &protocol.Request{Type: &queryRequest, Query: &queryString, Id: &id, Database: &db, UserName: &userName}
			if server.ringLocationsToQuery != replicationFactor {
				r := server.ringLocationsToQuery
				request.RingLocationsToQuery = &r
			}
			responseChan := make(chan *protocol.Response, 3)
			server.server.protobufClient.MakeRequest(request, responseChan)
			responseChannels = append(responseChannels, responseChan)
		}
	}

	local := make(chan *protocol.Response)
	nextPointMap := make(map[string]*protocol.Point)

	// TODO: this style of wrapping the series in response objects with the
	//       last point time is duplicated in the request handler. Refactor...
	sendFromLocal := func(series *protocol.Series) error {
		pointCount := len(series.Points)
		if pointCount == 0 {
			if nextPoint := nextPointMap[*series.Name]; nextPoint != nil {
				series.Points = append(series.Points, nextPoint)
			}

			local <- &protocol.Response{Type: &queryResponse, Series: series}
			return nil
		}
		oldNextPoint := nextPointMap[*series.Name]
		nextPoint := series.Points[pointCount-1]
		series.Points[pointCount-1] = nil
		if oldNextPoint != nil {
			copy(series.Points[1:], series.Points[0:])
			series.Points[0] = oldNextPoint
		} else {
			series.Points = series.Points[:len(series.Points)-1]
		}

		response := &protocol.Response{Series: series, Type: &queryResponse}
		if nextPoint != nil {
			nextPointMap[*series.Name] = nextPoint
			response.NextPointTime = nextPoint.Timestamp
		}
		local <- response
		return nil
	}
	responseChannels = append(responseChannels, local)
	// TODO: wire up the willreturnsingleseries method and uncomment this line and delete the next one.
	//	isSingleSeriesQuery := query.WillReturnSingleSeries()
	isSingleSeriesQuery := false

	go func() {
		var ringFilter func(database, series *string, time *int64) bool
		if replicationFactor != localServerToQuery.ringLocationsToQuery {
			ringFilter = self.clusterConfiguration.GetRingFilterFunction(db, localServerToQuery.ringLocationsToQuery)
		}
		self.datastore.ExecuteQuery(user, db, query, sendFromLocal, ringFilter)
		local <- &protocol.Response{Type: &endStreamResponse}
		close(local)
	}()
	self.streamResultsFromChannels(isSingleSeriesQuery, query.Ascending, responseChannels, yield)
	return nil
}