registry

package
v0.6.1 Latest Latest
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 Go to latest Published: Feb 12, 2019 License: Apache-2.0 Imports: 21 Imported by: 1

Documentation

Overview

Package registry implements Registry API

Index

Constants

View Source 
const (
	FTypeOne  = "one"
	FTypeMany = "many"

	MaxPerPage = 100
)
View Source 
const (
	MEMORY  = "memory"
	LEVELDB = "leveldb"
)

Variables

View Source 
var (
	ErrNotFound = errors.New("Datasource Not Found")
	ErrConflict = errors.New("Conflict")
)

Functions

func ErrType 

func ErrType(err, e error) bool

func SupportedBackends added in v0.6.1 

func SupportedBackends(name string) bool

SupportedBackends returns true if the backend is listed as true

Types

type API added in v0.6.1 

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

RESTful HTTP API

func NewAPI added in v0.6.1 

func NewAPI(storage Storage) *API

Returns the configured Registry API

func (*API) Create added in v0.6.1 

func (api *API) Create(w http.ResponseWriter, r *http.Request)

Create is a handler for creating a new DataSource

func (*API) Delete added in v0.6.1 

func (api *API) Delete(w http.ResponseWriter, r *http.Request)

Delete is a handler for deleting the given DataSource Expected parameters: id

func (*API) Filter added in v0.6.1 

func (api *API) Filter(w http.ResponseWriter, r *http.Request)

Filter is a handler for registry filtering API Expected parameters: path, type, op, value

func (*API) Index added in v0.6.1 

func (api *API) Index(w http.ResponseWriter, r *http.Request)

Index is a handler for the registry index

func (*API) Retrieve added in v0.6.1 

func (api *API) Retrieve(w http.ResponseWriter, r *http.Request)

Retrieve is a handler for retrieving a new DataSource Expected parameters: id

func (*API) Update added in v0.6.1 

func (api *API) Update(w http.ResponseWriter, r *http.Request)

Update is a handler for updating the given DataSource Expected parameters: id

type Aggregation 

type Aggregation struct {
	ID string `json:"id"`
	// Interval is the aggregation interval
	Interval string `json:"interval"`
	// Data is the URL to the data in the Aggregate API
	Data string `json:"data"`
	// Aggregates is an array of aggregates calculated on each interval
	// Valid values: mean, stddev, sum, min, max, median
	Aggregates []string `json:"aggregates"`
	// Retention is the retention duration
	Retention string `json:"retention"`
}

Aggregation describes a data aggregatoin for a Data Source

func (*Aggregation) Make 

func (a *Aggregation) Make(dsID string)

Generate ID and Data attributes for a given aggregation ID is the checksum of aggregation interval and all its aggregates

type Connector 

type Connector struct {
	MQTT *MQTTConf `json:"mqtt,omitempty"`
}

Connector describes additional connectors to the Data API

type DataSource 

type DataSource struct {

	// ID is a unique ID of the data source
	ID string `json:"id"`
	// URL is the URL of the Data Source in the Registry API
	URL string `json:"url"`
	// Data is the URL to the data of this Data Source Data API
	Data string `json:"data"`
	// Resource URI (i.e., name in SenML)
	Resource string `json:"resource"`
	// Meta is a hash-map with optional meta-information
	Meta map[string]interface{} `json:"meta"`
	// Data connector
	Connector Connector `json:"connector"`
	// Retention is the retention duration for data
	Retention string `json:"retention"`
	// Aggregation is an array of configured aggregations
	Aggregation []Aggregation `json:"aggregation"`
	// Type is the values type used in payload
	Type string `json:"type"`
	// contains filtered or unexported fields
}

DataSource describes a single data source such as a sensor (LinkSmart Resource)

func (DataSource) MarshalJSON added in v0.5.0 

func (ds DataSource) MarshalJSON() ([]byte, error)

MarshalJSON masks sensitive information when using the default marshaller

func (DataSource) MarshalSensitiveJSON added in v0.5.0 

func (ds DataSource) MarshalSensitiveJSON() ([]byte, error)

MarshalSensitiveJSON serializes the datasource including the sensitive information

func (*DataSource) ParsedResource 

func (ds *DataSource) ParsedResource() *url.URL

type EventListener added in v0.6.1 

type EventListener interface {
	CreateHandler(new DataSource) error
	UpdateHandler(old DataSource, new DataSource) error
	DeleteHandler(old DataSource) error
}

EventListener is implemented by storage modules and connectors which need to react to changes in the registry

type LevelDBStorage 

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

LevelDB storage

func (*LevelDBStorage) Add added in v0.6.1 

func (s *LevelDBStorage) Add(ds DataSource) (DataSource, error)

func (*LevelDBStorage) Delete added in v0.6.1 

func (s *LevelDBStorage) Delete(id string) error

func (*LevelDBStorage) Filter added in v0.6.1 

func (s *LevelDBStorage) Filter(path, op, value string, page, perPage int) ([]DataSource, int, error)

Filter multiple registrations

func (*LevelDBStorage) FilterOne added in v0.6.1 

func (s *LevelDBStorage) FilterOne(path, op, value string) (*DataSource, error)

Path filtering Filter one registration

func (*LevelDBStorage) Get added in v0.6.1 

func (s *LevelDBStorage) Get(id string) (DataSource, error)

func (*LevelDBStorage) GetMany added in v0.6.1 

func (s *LevelDBStorage) GetMany(page, perPage int) ([]DataSource, int, error)

func (*LevelDBStorage) Update added in v0.6.1 

func (s *LevelDBStorage) Update(id string, ds DataSource) (DataSource, error)

type MQTTConf 

type MQTTConf struct {
	URL      string `json:"url"`
	Topic    string `json:"topic"`
	QoS      byte   `json:"qos"`
	Username string `json:"username,omitempty"`
	Password string `json:"password,omitempty"`
	CaFile   string `json:"caFile,omitempty"`
	CertFile string `json:"certFile,omitempty"`
	KeyFile  string `json:"keyFile,omitempty"`
}

MQTT describes a MQTT Connector

type MemoryStorage 

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

In-memory storage

func (*MemoryStorage) Add added in v0.6.1 

func (ms *MemoryStorage) Add(ds DataSource) (DataSource, error)

func (*MemoryStorage) Delete added in v0.6.1 

func (ms *MemoryStorage) Delete(id string) error

func (*MemoryStorage) Filter added in v0.6.1 

func (ms *MemoryStorage) Filter(path, op, value string, page, perPage int) ([]DataSource, int, error)

Filter multiple registrations

func (*MemoryStorage) FilterOne added in v0.6.1 

func (ms *MemoryStorage) FilterOne(path, op, value string) (*DataSource, error)

Path filtering Filter one registration

func (*MemoryStorage) Get added in v0.6.1 

func (ms *MemoryStorage) Get(id string) (DataSource, error)

func (*MemoryStorage) GetMany added in v0.6.1 

func (ms *MemoryStorage) GetMany(page, perPage int) ([]DataSource, int, error)

func (*MemoryStorage) Update added in v0.6.1 

func (ms *MemoryStorage) Update(id string, ds DataSource) (DataSource, error)

type Registry 

type Registry struct {
	// URL is the URL of the Registry API
	URL string `json:"url"`
	// Entries is an array of Data Sources
	Entries []DataSource `json:"entries"`
	// Page is the current page in Entries pagination
	Page int `json:"page"`
	// PerPage is the results per page in Entries pagination
	PerPage int `json:"per_page"`
	// Total is the total #of pages in Entries pagination
	Total int `json:"total"`
}

Registry describes a registry of registered Data Sources

type RemoteClient 

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

func NewRemoteClient 

func NewRemoteClient(serverEndpoint string, ticket *obtainer.Client) (*RemoteClient, error)

func (*RemoteClient) Add 

func (c *RemoteClient) Add(d *DataSource) (string, error)

func (*RemoteClient) Delete 

func (c *RemoteClient) Delete(id string) error

func (*RemoteClient) Filter added in v0.6.1 

func (c *RemoteClient) Filter(path, op, value string) ([]DataSource, error)

func (*RemoteClient) FilterOne 

func (c *RemoteClient) FilterOne(path, op, value string) (*DataSource, error)

func (*RemoteClient) Get 

func (c *RemoteClient) Get(id string) (*DataSource, error)

func (*RemoteClient) GetMany added in v0.6.1 

func (c *RemoteClient) GetMany(page int, perPage int) (*Registry, error)

func (*RemoteClient) Update 

func (c *RemoteClient) Update(id string, d *DataSource) error

type Storage 

type Storage interface {
	// CRUD
	Add(ds DataSource) (DataSource, error)
	Update(id string, ds DataSource) (DataSource, error)
	Get(id string) (DataSource, error)
	Delete(id string) error
	// Utility functions
	GetMany(page, perPage int) ([]DataSource, int, error)
	FilterOne(path, op, value string) (*DataSource, error)
	Filter(path, op, value string, page, perPage int) ([]DataSource, int, error)
	// contains filtered or unexported methods
}

Storage is an interface of a Registry storage backend

func NewLevelDBStorage 

func NewLevelDBStorage(conf common.RegConf, opts *opt.Options, listeners ...EventListener) (Storage, func() error, error)

func NewMemoryStorage 

func NewMemoryStorage(conf common.RegConf, listeners ...EventListener) Storage

Source Files

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