sinks

Documentation

Index

• Variables
• type Page
• type PageMetadata
• type Sink
• type SinkRepository
• type SinkService
  • func NewSinkService(logger *zap.Logger, auth mainflux.AuthServiceClient, sinkRepo SinkRepository, ...) SinkService
• type State
  • func (s *State) Scan(value interface{}) error
  • func (s State) String() string
  • func (s State) Value() (driver.Value, error)

Variables

var (
	// ErrMalformedEntity indicates malformed entity specification (e.g.
	// invalid username or password).
	ErrMalformedEntity = errors.New("malformed entity specification")

	// ErrNotFound indicates a non-existent entity request.
	ErrNotFound = errors.New("non-existent entity")

	// ErrConflict indicates that entity already exists.
	ErrConflict = errors.New("entity already exists")

	// ErrScanMetadata indicates problem with metadata in db
	ErrScanMetadata = errors.New("failed to scan metadata in db")

	// ErrSelectEntity indicates error while reading entity from database
	ErrSelectEntity = errors.New("select entity from db error")

	// ErrEntityConnected indicates error while checking connection in database
	ErrEntityConnected = errors.New("check connection in database error")

	// ErrUpdateEntity indicates error while updating a entity
	ErrUpdateEntity = errors.New("failed to update entity")

	ErrUnauthorizedAccess = errors.New("missing or invalid credentials provided")

	ErrRemoveEntity = errors.New("failed to remove entity")

	ErrInvalidBackend = errors.New("No available backends")
)

var (
	ErrCreateSink                 = errors.New("failed to create Sink")
	ErrConflictSink               = errors.New("entity already exists")
	ErrUnsupportedContentTypeSink = errors.New("unsupported content type")
	ErrValidateSink               = errors.New("failed to validate Sink")
)

Types

type Page

type Page struct {
	PageMetadata
	Sinks []Sink
}

Page contains page related metadata as well as list of sinks that belong to this page

type PageMetadata

type PageMetadata struct {
	Total    uint64
	Offset   uint64         `json:"offset,omitempty"`
	Limit    uint64         `json:"limit,omitempty"`
	Name     string         `json:"name,omitempty"`
	Order    string         `json:"order,omitempty"`
	Dir      string         `json:"dir,omitempty"`
	Metadata types.Metadata `json:"metadata,omitempty"`
	Tags     types.Tags     `json:"tags,omitempty"`
}

PageMetadata contains page metadata that helps navigation

type Sink

type Sink struct {
	ID          string
	Name        types.Identifier
	MFOwnerID   string
	Description string
	Backend     string
	Config      types.Metadata
	Tags        types.Tags
	State       State
	Error       string
	Created     time.Time
}

type SinkRepository

type SinkRepository interface {
	// Save persists the Sink. Successful operation is indicated by non-nil
	// error response.
	Save(ctx context.Context, sink Sink) (string, error)
	// Update performs an update to the existing sink, A non-nil error is
	// returned to indicate operation failure
	Update(ctx context.Context, sink Sink) error
	// RetrieveAll retrieves Sinks
	RetrieveAll(ctx context.Context, owner string, pm PageMetadata) (Page, error)
	// RetrieveById retrieves a Sink by Id
	RetrieveById(ctx context.Context, key string) (Sink, error)
	// RetrieveById retrieves a Sink by Id
	RetrieveByOwnerAndId(ctx context.Context, ownerID string, key string) (Sink, error)
	// Remove a existing Sink by id
	Remove(ctx context.Context, owner string, key string) error
	// UpdateSinkState
	UpdateSinkState(ctx context.Context, sinkID string, msg string, ownerID string, state State) error
}

type SinkService

type SinkService interface {
	// CreateSink creates new data sink
	CreateSink(ctx context.Context, token string, s Sink) (Sink, error)
	// UpdateSink by id
	UpdateSink(ctx context.Context, token string, s Sink) error
	// ListSinks retrieves data about sinks
	ListSinks(ctx context.Context, token string, pm PageMetadata) (Page, error)
	// ListBackends retrieves a list of available backends
	ListBackends(ctx context.Context, token string) ([]string, error)
	// ViewBackend retrieves a backend by the name
	ViewBackend(ctx context.Context, token string, key string) (backend.Backend, error)
	// ViewSink retrieves a sink by id
	ViewSink(ctx context.Context, token string, key string) (Sink, error)
	// ViewSink retrieves a sink by id
	ViewSinkInternal(ctx context.Context, ownerID string, key string) (Sink, error)
	// DeleteSink delete a existing sink by id
	DeleteSink(ctx context.Context, token string, key string) error
	// ValidateSink validate a sink configuration without saving
	ValidateSink(ctx context.Context, token string, sink Sink) (Sink, error)
	// ChangeState
	ChangeSinkStateInternal(ctx context.Context, sinkID string, msg string, ownerID string, state State) error
}

SinkService Sink CRUD interface

func NewSinkService

func NewSinkService(logger *zap.Logger, auth mainflux.AuthServiceClient, sinkRepo SinkRepository, mfsdk mfsdk.SDK) SinkService

type State

type State int

const (
	Unknown State = iota
	Active
	Error
	Idle
)

func (*State) Scan

func (s *State) Scan(value interface{}) error

func (State) String

func (s State) String() string

func (State) Value

func (s State) Value() (driver.Value, error)