backend

package
v0.0.0-...-b9360c4 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Dec 15, 2023 License: BSD-3-Clause Imports: 39 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	InitialBatchSize = 50000
	MaximumBatchSize = 200000
)
View Source 
const (
	MaximumDataRecordLength = 1024 * 10
)
View Source 
const (
	MaximumRetriesBeforeTrash = 3
)
View Source 
const (
	SecondsBetweenProgressUpdates = 1
)

Variables

View Source 
var (
	ErrEmptyRefresh = errors.New("empty refresh")
)

Functions

func CreateMap 

func CreateMap(ctx context.Context, services *BackgroundServices) gue.WorkMap

func Logger 

func Logger(ctx context.Context) *zap.Logger

func NewMuxRecordHandler 

func NewMuxRecordHandler(handlers []RecordHandler) *muxRecordHandler

func NewNoopRecordHandler 

func NewNoopRecordHandler() *noopRecordHandler

func NotifyMentions 

func NotifyMentions(mentions []*Mention) []*data.Notification

func ParseStationIDs 

func ParseStationIDs(raw *string) []int32

func Register 

func Register(ctx context.Context, services *BackgroundServices, work map[string]gue.WorkFunc, message interface{}, handler OurTransportMessageFunc)

func SignS3URL 

func SignS3URL(svc *s3.S3, url string) (signed string, err error)

func WalkerProgressNoop 

func WalkerProgressNoop(ctx context.Context, progress float64) error

Types

type AggregateQueryParams 

type AggregateQueryParams struct {
	Start              time.Time
	End                time.Time
	Stations           []int32
	Sensors            []ModuleAndSensor
	Complete           bool
	Interval           int32
	TimeGroupThreshold int32
	AggregateName      string
	ExpectedRecords    int64
	Summary            *AggregateSummary
}

func NewAggregateQueryParams 

func NewAggregateQueryParams(qp *QueryParams, selectedAggregateName string, summary *AggregateSummary) (*AggregateQueryParams, error)

type AggregateSummary 

type AggregateSummary struct {
	NumberRecords int64                 `db:"number_records" json:"numberRecords"`
	Start         *data.NumericWireTime `db:"start" json:"start"`
	End           *data.NumericWireTime `db:"end" json:"end"`
}

type AsyncFileWriter 

type AsyncFileWriter struct {
	// contains filtered or unexported fields
}

func NewAsyncFileWriter 

func NewAsyncFileWriter(readFunc AsyncReaderFunc, writeFunc AsyncWriterFunc) *AsyncFileWriter

func (*AsyncFileWriter) Start 

func (w *AsyncFileWriter) Start(ctx context.Context) error

func (*AsyncFileWriter) Wait 

func (w *AsyncFileWriter) Wait(ctx context.Context) error

type AsyncReaderFunc 

type AsyncReaderFunc func(ctx context.Context, reader io.Reader) error

type AsyncWriterFunc 

type AsyncWriterFunc func(ctx context.Context, writer io.Writer) error

type BackgroundServices 

type BackgroundServices struct {
	// contains filtered or unexported fields
}

func NewBackgroundServices 

func NewBackgroundServices(database *sqlxcache.DB, dbpool *pgxpool.Pool, metrics *logging.Metrics, fileArchives *FileArchives, que *gue.Client, timeScaleConfig *storage.TimeScaleDBConfig, locations *data.DescribeLocations) *BackgroundServices

type CanExport 

type CanExport interface {
	Prepare(ctx context.Context, urls []string) error
	Export(ctx context.Context, urls []string) error
}

type CsvExporter 

type CsvExporter struct {
	// contains filtered or unexported fields
}

func NewCsvExporter 

func NewCsvExporter(files files.FileArchive, metrics *logging.Metrics, writer io.Writer, progress OnWalkProgress) (self *CsvExporter)

func (*CsvExporter) Export 

func (e *CsvExporter) Export(ctx context.Context, urls []string) error

func (*CsvExporter) OnData 

func (e *CsvExporter) OnData(ctx context.Context, rawRecord *pb.DataRecord, rawMetaUnused *pb.DataRecord, bytes []byte) error

func (*CsvExporter) OnDone 

func (e *CsvExporter) OnDone(ctx context.Context) (err error)

func (*CsvExporter) OnMeta 

func (e *CsvExporter) OnMeta(ctx context.Context, recordNumber int64, rawRecord *pb.DataRecord, bytes []byte) error

func (*CsvExporter) OnSignedMeta 

func (e *CsvExporter) OnSignedMeta(ctx context.Context, signedRecord *pb.SignedRecord, rawRecord *pb.DataRecord, bytes []byte) error

func (*CsvExporter) Prepare 

func (e *CsvExporter) Prepare(ctx context.Context, urls []string) error

type DataQuerier 

type DataQuerier struct {
	// contains filtered or unexported fields
}

func NewDataQuerier 

func NewDataQuerier(db *sqlxcache.DB) *DataQuerier

func (*DataQuerier) GetIDs 

func (dq *DataQuerier) GetIDs(ctx context.Context, mas []ModuleAndSensor) (*SensorDatabaseIDs, error)

func (*DataQuerier) GetStationIDs 

func (dq *DataQuerier) GetStationIDs(ctx context.Context, stationIDs []int32) (*SensorDatabaseIDs, error)

func (*DataQuerier) QueryAggregate 

func (dq *DataQuerier) QueryAggregate(ctx context.Context, aqp *AggregateQueryParams) (rows *sqlx.Rows, err error)

func (*DataQuerier) QueryMeta 

func (dq *DataQuerier) QueryMeta(ctx context.Context, qp *QueryParams) (qm *QueryMeta, err error)

func (*DataQuerier) QueryOuterValues 

func (dq *DataQuerier) QueryOuterValues(ctx context.Context, aqp *AggregateQueryParams) (rr []*DataRow, err error)

func (*DataQuerier) SelectAggregate 

func (dq *DataQuerier) SelectAggregate(ctx context.Context, qp *QueryParams) (summaries map[string]*AggregateSummary, name string, err error)

type DataRow 

type DataRow struct {
	Time      data.NumericWireTime `db:"time" json:"time"`
	StationID *int32               `db:"station_id" json:"stationId,omitempty"`
	SensorID  *int64               `db:"sensor_id" json:"sensorId,omitempty"`
	ModuleID  *string              `db:"module_id" json:"moduleId,omitempty"`
	Location  *data.Location       `db:"location" json:"location,omitempty"`
	Value     *float64             `db:"value" json:"value,omitempty"`

	// Deprecated
	Id        *int64 `db:"id" json:"-"`
	TimeGroup *int32 `db:"time_group" json:"-"`

	// TSDB
	BucketSamples *int32     `json:"-",omitempty`
	DataStart     *time.Time `json:"-",omitempty`
	DataEnd       *time.Time `json:"-",omitempty`
	AverageValue  *float64   `json:"avg,omitempty"`
	MinimumValue  *float64   `json:"min,omitempty"`
	MaximumValue  *float64   `json:"max,omitempty"`
	LastValue     *float64   `json:"last,omitempty"`
}

func (*DataRow) CoerceNaNs 

func (row *DataRow) CoerceNaNs()

type DescribeStationLocationHandler 

type DescribeStationLocationHandler struct {
	// contains filtered or unexported fields
}

func NewDescribeStationLocationHandler 

func NewDescribeStationLocationHandler(db *sqlxcache.DB, metrics *logging.Metrics, publisher jobs.MessagePublisher, locations *data.DescribeLocations) *DescribeStationLocationHandler

func (*DescribeStationLocationHandler) Handle 

func (h *DescribeStationLocationHandler) Handle(ctx context.Context, m *messages.StationLocationUpdated, j *gue.Job) error

type DirtyRange 

type DirtyRange struct {
	ModifiedTime *time.Time `json:"modified"`
	DataStart    *time.Time `json:"data_start"`
	DataEnd      *time.Time `json:"data_end"`
}

type ExportDataHandler 

type ExportDataHandler struct {
	// contains filtered or unexported fields
}

func NewExportDataHandler 

func NewExportDataHandler(db *sqlxcache.DB, files files.FileArchive, metrics *logging.Metrics) *ExportDataHandler

func (*ExportDataHandler) Handle 

func (h *ExportDataHandler) Handle(ctx context.Context, m *messages.ExportData) error

type FileArchives 

type FileArchives struct {
	Ingestion files.FileArchive
	Media     files.FileArchive
	Exported  files.FileArchive
}

type FkbHandler 

type FkbHandler interface {
	OnSignedMeta(ctx context.Context, signedRecord *pb.SignedRecord, rawRecord *pb.DataRecord, bytes []byte) error
	OnMeta(ctx context.Context, recordNumber int64, rawMeta *pb.DataRecord, bytes []byte) error
	OnData(ctx context.Context, rawData *pb.DataRecord, rawMeta *pb.DataRecord, bytes []byte) error
	OnDone(ctx context.Context) error
}

type FkbWalker 

type FkbWalker struct {
	// contains filtered or unexported fields
}

func NewFkbWalker 

func NewFkbWalker(files files.FileArchive, metrics *logging.Metrics, handler FkbHandler, progress OnWalkProgress, verbose bool) (ra *FkbWalker)

func (*FkbWalker) WalkUrl 

func (ra *FkbWalker) WalkUrl(ctx context.Context, url string) (info *WalkRecordsInfo, err error)

type HandlerCollectionHandler 

type HandlerCollectionHandler struct {
	// contains filtered or unexported fields
}

func NewHandlerCollectionHandler 

func NewHandlerCollectionHandler(handlers []RecordHandler) *HandlerCollectionHandler

func (*HandlerCollectionHandler) OnData 

func (v *HandlerCollectionHandler) OnData(ctx context.Context, provision *data.Provision, rawData *pb.DataRecord, rawMeta *pb.DataRecord, db *data.DataRecord, meta *data.MetaRecord) error

func (*HandlerCollectionHandler) OnDone 

func (v *HandlerCollectionHandler) OnDone(ctx context.Context) error

func (*HandlerCollectionHandler) OnMeta 

func (v *HandlerCollectionHandler) OnMeta(ctx context.Context, provision *data.Provision, rawMeta *pb.DataRecord, meta *data.MetaRecord) error

type IngestStationHandler 

type IngestStationHandler struct {
	// contains filtered or unexported fields
}

func NewIngestStationHandler 

func NewIngestStationHandler(db *sqlxcache.DB, dbpool *pgxpool.Pool, files files.FileArchive, metrics *logging.Metrics, publisher jobs.MessagePublisher, tsConfig *storage.TimeScaleDBConfig) *IngestStationHandler

func (*IngestStationHandler) IngestionCompleted 

func (h *IngestStationHandler) IngestionCompleted(ctx context.Context, m *messages.IngestionCompleted, mc *jobs.MessageContext) error

func (*IngestStationHandler) IngestionFailed 

func (h *IngestStationHandler) IngestionFailed(ctx context.Context, m *messages.IngestionFailed, mc *jobs.MessageContext) error

func (*IngestStationHandler) Start 

func (h *IngestStationHandler) Start(ctx context.Context, m *messages.IngestStation, mc *jobs.MessageContext) error

type IngestionReceivedHandler 

type IngestionReceivedHandler struct {
	// contains filtered or unexported fields
}

func NewIngestionReceivedHandler 

func NewIngestionReceivedHandler(db *sqlxcache.DB, dbpool *pgxpool.Pool, files files.FileArchive, metrics *logging.Metrics, publisher jobs.MessagePublisher, tsConfig *storage.TimeScaleDBConfig) *IngestionReceivedHandler

func (*IngestionReceivedHandler) BatchCompleted 

func (h *IngestionReceivedHandler) BatchCompleted(ctx context.Context, m *messages.SensorDataBatchCommitted, mc *jobs.MessageContext) error

func (*IngestionReceivedHandler) Start 

func (h *IngestionReceivedHandler) Start(ctx context.Context, m *messages.IngestionReceived, mc *jobs.MessageContext) error

type IngestionSaga 

type IngestionSaga struct {
	QueuedID  int64           `json:"queued_id"`
	UserID    int32           `json:"user_id"`
	StationID *int32          `json:"station_id"`
	DataStart time.Time       `json:"data_start"`
	DataEnd   time.Time       `json:"data_end"`
	Required  map[string]bool `json:"required"`
	Completed map[string]bool `json:"completed"`
}

func (*IngestionSaga) IsCompleted 

func (s *IngestionSaga) IsCompleted() bool

type JsonLinesExporter 

type JsonLinesExporter struct {
	// contains filtered or unexported fields
}

func NewJsonLinesExporter 

func NewJsonLinesExporter(files files.FileArchive, metrics *logging.Metrics, writer io.Writer, progress OnWalkProgress) (self *JsonLinesExporter)

func (*JsonLinesExporter) Export 

func (e *JsonLinesExporter) Export(ctx context.Context, urls []string) error

func (*JsonLinesExporter) OnData 

func (e *JsonLinesExporter) OnData(ctx context.Context, rawRecord *pb.DataRecord, rawMetaUnused *pb.DataRecord, bytes []byte) error

func (*JsonLinesExporter) OnDone 

func (e *JsonLinesExporter) OnDone(ctx context.Context) (err error)

func (*JsonLinesExporter) OnMeta 

func (e *JsonLinesExporter) OnMeta(ctx context.Context, recordNumber int64, rawRecord *pb.DataRecord, bytes []byte) error

func (*JsonLinesExporter) OnSignedMeta 

func (e *JsonLinesExporter) OnSignedMeta(ctx context.Context, signedRecord *pb.SignedRecord, rawRecord *pb.DataRecord, bytes []byte) error

func (*JsonLinesExporter) Prepare 

func (e *JsonLinesExporter) Prepare(ctx context.Context, urls []string) error

type Mention 

type Mention struct {
	UserID   int32 `json:"user_id"`
	PostID   int64 `json:"post_id"`
	AuthorID int32 `json:"author_id"`
}

func DiscoverMentions 

func DiscoverMentions(ctx context.Context, postID int64, body string, authorID int32) ([]*Mention, error)

type MessageCollection 

type MessageCollection []proto.Message

func ReadLengthPrefixedCollection 

func ReadLengthPrefixedCollection(ctx context.Context, maximumMessageLength uint64, r io.Reader, f UnmarshalFunc) (pbs MessageCollection, totalBytesRead int, err error)

ReadLengthPrefixedCollection reads a collection of protocol buffer messages from the supplied reader. Each message is presumed prefixed by a 32 bit varint which represents the size of the ensuing message. The UnmarshalFunc argument is a supplied callback used to convert the raw bytes read as a message to the desired message type. The protocol buffer message collection is returned, along with any error arising. For more detailed information on this approach, see the official protocol buffer documentation https://developers.google.com/protocol-buffers/docs/techniques#streaming.

type ModuleAndSensor 

type ModuleAndSensor struct {
	ModuleID string `json:"module_id"`
	SensorID int64  `json:"sensor_id"`
}

type OnWalkProgress 

type OnWalkProgress func(ctx context.Context, progress WalkProgress) error

type OurTransportMessageFunc 

type OurTransportMessageFunc func(ctx context.Context, j *gue.Job, services *BackgroundServices, tm *jobs.TransportMessage, mc *jobs.MessageContext) error

type ProgressReader 

type ProgressReader struct {
	io.ReadCloser
	// contains filtered or unexported fields
}

func (*ProgressReader) Close 

func (r *ProgressReader) Close() error

func (*ProgressReader) Read 

func (r *ProgressReader) Read(p []byte) (int, error)

type QueriedModuleID 

type QueriedModuleID struct {
	StationID  int32  `db:"station_id"`
	ModuleID   int64  `db:"module_id"`
	HardwareID []byte `db:"hardware_id"`
}

type QueryMeta 

type QueryMeta struct {
	Sensors  map[int64]*SensorMeta
	Stations map[int32]*StationMeta
}

type QueryParams 

type QueryParams struct {
	Start           time.Time         `json:"start"`
	End             time.Time         `json:"end"`
	Stations        []int32           `json:"stations"`
	Sensors         []ModuleAndSensor `json:"sensors"`
	Resolution      int32             `json:"resolution"`
	Aggregate       string            `json:"aggregate"`
	Tail            int32             `json:"tail"`
	Complete        bool              `json:"complete"`
	Backend         string            `json:"backend"`
	Eternity        bool              `json:"eternity"`
	BeginningOfTime bool              `json:"beginning_of_time"`
	EndOfTime       bool              `json:"end_of_time"`
}

func ExportQueryParams 

func ExportQueryParams(de *data.DataExport) (*QueryParams, error)

type RawQueryParams 

type RawQueryParams struct {
	Start      *int64  `json:"start"`
	End        *int64  `json:"end"`
	Resolution *int32  `json:"resolution"`
	Stations   *string `json:"stations"`
	Sensors    *string `json:"sensors"`
	Modules    *string `json:"modules"`
	Aggregate  *string `json:"aggregate"`
	Tail       *int32  `json:"tail"`
	Complete   *bool   `json:"complete"`
	Backend    *string `json:"backend"`
}

func (*RawQueryParams) BuildQueryParams 

func (raw *RawQueryParams) BuildQueryParams() (qp *QueryParams, err error)

type RecordAdder 

type RecordAdder struct {
	// contains filtered or unexported fields
}

func NewRecordAdder 

func NewRecordAdder(db *sqlxcache.DB, files files.FileArchive, metrics *logging.Metrics, handler RecordHandler, verbose bool, saveData bool) (ra *RecordAdder)

func (*RecordAdder) OnData 

func (ra *RecordAdder) OnData(ctx context.Context, rawRecord *pb.DataRecord, rawMetaUnused *pb.DataRecord, bytes []byte) error

func (*RecordAdder) OnDone 

func (ra *RecordAdder) OnDone(ctx context.Context) (err error)

func (*RecordAdder) OnMeta 

func (ra *RecordAdder) OnMeta(ctx context.Context, recordNumber int64, rawRecord *pb.DataRecord, bytes []byte) error

func (*RecordAdder) OnSignedMeta 

func (ra *RecordAdder) OnSignedMeta(ctx context.Context, signedRecord *pb.SignedRecord, rawRecord *pb.DataRecord, bytes []byte) error

func (*RecordAdder) WriteRecords 

func (ra *RecordAdder) WriteRecords(ctx context.Context, ingestion *data.Ingestion) (info *WriteInfo, err error)

type RecordHandler 

type RecordHandler interface {
	OnMeta(ctx context.Context, provision *data.Provision, rawMeta *pb.DataRecord, db *data.MetaRecord) error
	OnData(ctx context.Context, provision *data.Provision, rawData *pb.DataRecord, rawMeta *pb.DataRecord, db *data.DataRecord, meta *data.MetaRecord) error
	OnDone(ctx context.Context) error
}

func NewAllHandlers 

func NewAllHandlers(db *sqlxcache.DB, tsConfig *storage.TimeScaleDBConfig, publisher jobs.MessagePublisher, completions *jobs.CompletionIDs) RecordHandler

type RecordWalker 

type RecordWalker struct {
	// contains filtered or unexported fields
}

func NewRecordWalker 

func NewRecordWalker(db *sqlxcache.DB) (rw *RecordWalker)

func (*RecordWalker) Info 

func (rw *RecordWalker) Info(ctx context.Context) (*WalkInfo, error)

func (*RecordWalker) WalkStation 

func (rw *RecordWalker) WalkStation(ctx context.Context, handler RecordHandler, progress WalkerProgressFunc, params *WalkParameters) error

type RefreshMaterializedViewsHandler 

type RefreshMaterializedViewsHandler struct {
	// contains filtered or unexported fields
}

func NewRefreshMaterializedViewsHandler 

func NewRefreshMaterializedViewsHandler(metrics *logging.Metrics, tsConfig *storage.TimeScaleDBConfig) *RefreshMaterializedViewsHandler

func (*RefreshMaterializedViewsHandler) RefreshView 

func (h *RefreshMaterializedViewsHandler) RefreshView(ctx context.Context, m *messages.RefreshMaterializedView, mc *jobs.MessageContext) error

func (*RefreshMaterializedViewsHandler) Start 

func (h *RefreshMaterializedViewsHandler) Start(ctx context.Context, m *messages.RefreshAllMaterializedViews, mc *jobs.MessageContext) error

type RefreshStationHandler 

type RefreshStationHandler struct {
	// contains filtered or unexported fields
}

func NewRefreshStationHandler 

func NewRefreshStationHandler(db *sqlxcache.DB, tsConfig *storage.TimeScaleDBConfig) *RefreshStationHandler

func (*RefreshStationHandler) Handle 

func (h *RefreshStationHandler) Handle(ctx context.Context, m *messages.RefreshStation) error

type RefreshWindows 

type RefreshWindows struct {
	// contains filtered or unexported fields
}

func NewRefreshWindows 

func NewRefreshWindows(pool *pgxpool.Pool) *RefreshWindows

func (*RefreshWindows) DeleteAll 

func (rw *RefreshWindows) DeleteAll(ctx context.Context) error

func (*RefreshWindows) QueryForDirty 

func (rw *RefreshWindows) QueryForDirty(ctx context.Context) ([]*DirtyRange, error)

type SensorDataBatchHandler 

type SensorDataBatchHandler struct {
	// contains filtered or unexported fields
}

func NewSensorDataBatchHandler 

func NewSensorDataBatchHandler(metrics *logging.Metrics, publisher jobs.MessagePublisher, tsConfig *storage.TimeScaleDBConfig) *SensorDataBatchHandler

func (*SensorDataBatchHandler) Handle 

func (h *SensorDataBatchHandler) Handle(ctx context.Context, m *messages.SensorDataBatch, j *gue.Job, mc *jobs.MessageContext) error

type SensorDataModifiedHandler 

type SensorDataModifiedHandler struct {
	// contains filtered or unexported fields
}

func NewSensorDataModifiedHandler 

func NewSensorDataModifiedHandler(db *sqlxcache.DB, metrics *logging.Metrics, publisher jobs.MessagePublisher, tsConfig *storage.TimeScaleDBConfig) *SensorDataModifiedHandler

func (*SensorDataModifiedHandler) Handle 

func (h *SensorDataModifiedHandler) Handle(ctx context.Context, m *messages.SensorDataModified, j *gue.Job) error

type SensorDatabaseIDs 

type SensorDatabaseIDs struct {
	ModuleIDs       []int64
	SensorIDs       []int64
	KeyToHardwareID map[int64]string
}

type SensorMeta 

type SensorMeta struct {
	data.Sensor
}

type StationIngestionSaga 

type StationIngestionSaga struct {
	UserID     int32           `json:"user_id"`
	StationID  int32           `json:"station_id"`
	Ingestions []int64         `json:"ingestions"`
	Required   map[int64]int64 `json:"required"`
	Completed  map[int64]bool  `json:"completed"`
}

func (*StationIngestionSaga) HasMoreIngestions 

func (s *StationIngestionSaga) HasMoreIngestions() bool

func (*StationIngestionSaga) IsCompleted 

func (s *StationIngestionSaga) IsCompleted() bool

func (*StationIngestionSaga) NextIngestionID 

func (s *StationIngestionSaga) NextIngestionID() int64

type StationMeta 

type StationMeta struct {
	ID   int32  `db:"id"`
	Name string `db:"name"`
}

type StationRefresher 

type StationRefresher struct {
	// contains filtered or unexported fields
}

func NewStationRefresher 

func NewStationRefresher(db *sqlxcache.DB, tsConfig *storage.TimeScaleDBConfig, tableSuffix string) (sr *StationRefresher, err error)

func (*StationRefresher) Refresh 

func (sr *StationRefresher) Refresh(ctx context.Context, stationID int32, howRecently time.Duration, completely, skipManual bool) error

type UnmarshalFunc 

type UnmarshalFunc func([]byte) (proto.Message, error)

type WalkInfo 

type WalkInfo struct {
	MetaRecords int64
	DataRecords int64
}

type WalkParameters 

type WalkParameters struct {
	StationIDs []int32
	Start      time.Time
	End        time.Time
}

type WalkProgress 

type WalkProgress struct {
	// contains filtered or unexported fields
}

type WalkRecordsInfo 

type WalkRecordsInfo struct {
	TotalRecords int64
	DataRecords  int64
	MetaRecords  int64
	MetaErrors   int64
	DataErrors   int64
}

type WalkStatistics 

type WalkStatistics struct {
	Start   *time.Time `db:"start"`
	End     *time.Time `db:"end"`
	Records int64      `db:"records"`
}

type WalkerProgressFunc 

type WalkerProgressFunc func(ctx context.Context, progress float64) error

type WorkFailed 

type WorkFailed struct {
	Work *jobs.TransportMessage `json:"work"`
}

type WriteInfo 

type WriteInfo struct {
	IngestionID   int64
	StationID     *int32
	Walk          *WalkRecordsInfo
	FutureIgnores int64
	DataStart     time.Time
	DataEnd       time.Time
}

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