cache

Documentation

Index

• Constants
• Variables
• func RemoveScores(items []ScoredItem) []string
• type Database
  • func Open(path string) (Database, error)
• type NoDatabase
  • func (NoDatabase) AppendList(prefix, name string, items ...string) error
  • func (NoDatabase) ClearList(prefix, name string) error
  • func (NoDatabase) Close() error
  • func (NoDatabase) GetInt(prefix, name string) (int, error)
  • func (NoDatabase) GetList(prefix, name string) ([]string, error)
  • func (NoDatabase) GetScores(prefix, name string, begin, end int) ([]ScoredItem, error)
  • func (NoDatabase) GetString(prefix, name string) (string, error)
  • func (NoDatabase) GetTime(prefix, name string) (time.Time, error)
  • func (NoDatabase) IncrInt(prefix, name string) error
  • func (NoDatabase) SetInt(prefix, name string, val int) error
  • func (NoDatabase) SetScores(prefix, name string, items []ScoredItem) error
  • func (NoDatabase) SetString(prefix, name, val string) error
  • func (NoDatabase) SetTime(prefix, name string, val time.Time) error
• type Redis
  • func (r *Redis) AppendList(prefix, name string, items ...string) error
  • func (r *Redis) ClearList(prefix, name string) error
  • func (r *Redis) Close() error
  • func (r *Redis) GetInt(prefix, name string) (int, error)
  • func (r *Redis) GetList(prefix, name string) ([]string, error)
  • func (r *Redis) GetScores(prefix, name string, begin, end int) ([]ScoredItem, error)
  • func (r *Redis) GetString(prefix, name string) (string, error)
  • func (r *Redis) GetTime(prefix, name string) (time.Time, error)
  • func (r *Redis) IncrInt(prefix, name string) error
  • func (r *Redis) SetInt(prefix, name string, val int) error
  • func (r *Redis) SetScores(prefix, name string, items []ScoredItem) error
  • func (r *Redis) SetString(prefix, name, val string) error
  • func (r *Redis) SetTime(prefix, name string, val time.Time) error
• type ScoredItem
  • func CreateScoredItems(itemIds []string, scores []float32) []ScoredItem

Constants

const (
	IgnoreItems             = "ignore_items"
	SimilarItems            = "similar_items"
	RecommendItems          = "collaborative_items"
	SubscribeItems          = "subscribe_items"
	PopularItems            = "popular_items"
	LatestItems             = "latest_items"
	LastActiveTime          = "last_active_time"
	LastUpdateRecommendTime = "last_update_recommend_time"

	// GlobalMeta is global meta information
	GlobalMeta              = "global_meta"
	NumInserted             = "num_inserted"
	NumUsers                = "num_users"
	NumItems                = "num_items"
	NumPositiveFeedback     = "num_pos_feedback"
	LastUpdatePopularTime   = "last_update_popular_time"
	LastUpdateLatestTime    = "last_update_latest_time"
	LastUpdateNeighborTime  = "last_update_similar_time"
	LastFitRankingModelTime = "last_fit_match_model_time"
	LastRankingModelVersion = "latest_match_model_version"
)

Variables

var ErrNoDatabase = fmt.Errorf("no database specified")

var ErrObjectNotExist = fmt.Errorf("object not exists")

Functions

func RemoveScores

func RemoveScores(items []ScoredItem) []string

RemoveScores resolve items for a slice of ScoredItems.

Types

type Database

type Database interface {
	Close() error
	SetScores(prefix, name string, items []ScoredItem) error
	GetScores(prefix, name string, begin int, end int) ([]ScoredItem, error)
	ClearList(prefix, name string) error
	AppendList(prefix, name string, items ...string) error
	GetList(prefix, name string) ([]string, error)
	GetString(prefix, name string) (string, error)
	SetString(prefix, name string, val string) error
	GetTime(prefix, name string) (time.Time, error)
	SetTime(prefix, name string, val time.Time) error
	GetInt(prefix, name string) (int, error)
	SetInt(prefix, name string, val int) error
	IncrInt(prefix, name string) error
}

Database is the common interface for cache store.

func Open

func Open(path string) (Database, error)

Open a connection to a database.

type NoDatabase

type NoDatabase struct{}

NoDatabase means no database used for cache.

func (NoDatabase) AppendList

func (NoDatabase) AppendList(prefix, name string, items ...string) error

AppendList method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) ClearList

func (NoDatabase) ClearList(prefix, name string) error

ClearList method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) Close

func (NoDatabase) Close() error

Close method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) GetInt

func (NoDatabase) GetInt(prefix, name string) (int, error)

GetInt method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) GetList

func (NoDatabase) GetList(prefix, name string) ([]string, error)

GetList method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) GetScores

func (NoDatabase) GetScores(prefix, name string, begin, end int) ([]ScoredItem, error)

GetScores method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) GetString

func (NoDatabase) GetString(prefix, name string) (string, error)

GetString method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) GetTime

func (NoDatabase) GetTime(prefix, name string) (time.Time, error)

GetTime method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) IncrInt

func (NoDatabase) IncrInt(prefix, name string) error

IncrInt method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) SetInt

func (NoDatabase) SetInt(prefix, name string, val int) error

SetInt method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) SetScores

func (NoDatabase) SetScores(prefix, name string, items []ScoredItem) error

SetScores method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) SetString

func (NoDatabase) SetString(prefix, name, val string) error

SetString method of NoDatabase returns ErrNoDatabase.

func (NoDatabase) SetTime

func (NoDatabase) SetTime(prefix, name string, val time.Time) error

SetTime method of NoDatabase returns ErrNoDatabase.

type Redis

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

Redis cache storage.

func (*Redis) AppendList

func (r *Redis) AppendList(prefix, name string, items ...string) error

AppendList appends a list of scored items to Redis.

func (*Redis) ClearList

func (r *Redis) ClearList(prefix, name string) error

ClearList clears a list of items in Redis.

func (*Redis) Close

func (r *Redis) Close() error

Close redis connection.

func (*Redis) GetInt

func (r *Redis) GetInt(prefix, name string) (int, error)

GetInt returns a integer from Redis.

func (*Redis) GetList

func (r *Redis) GetList(prefix, name string) ([]string, error)

GetList returns a list of scored items from Redis.

func (*Redis) GetScores

func (r *Redis) GetScores(prefix, name string, begin, end int) ([]ScoredItem, error)

GetScores returns a list of scored items from Redis.

func (*Redis) GetString

func (r *Redis) GetString(prefix, name string) (string, error)

GetString returns a string from Redis.

func (*Redis) GetTime

func (r *Redis) GetTime(prefix, name string) (time.Time, error)

GetTime returns a time from Redis.

func (*Redis) IncrInt

func (r *Redis) IncrInt(prefix, name string) error

IncrInt increase a integer in Redis.

func (*Redis) SetInt

func (r *Redis) SetInt(prefix, name string, val int) error

SetInt saves a integer from Redis.

func (*Redis) SetScores

func (r *Redis) SetScores(prefix, name string, items []ScoredItem) error

SetScores save a list of scored items to Redis.

func (*Redis) SetString

func (r *Redis) SetString(prefix, name, val string) error

SetString saves a string to Redis.

func (*Redis) SetTime

func (r *Redis) SetTime(prefix, name string, val time.Time) error

SetTime saves a time from Redis.

type ScoredItem

type ScoredItem struct {
	ItemId string
	Score  float32
}

ScoredItem associate a item with a score.

func CreateScoredItems

func CreateScoredItems(itemIds []string, scores []float32) []ScoredItem

CreateScoredItems from items and scores.