worker

Documentation

Index

• Variables
• type FeedbackCache
  • func NewFeedbackCache(client data.Database, feedbackTypes ...string) *FeedbackCache
  • func (c *FeedbackCache) GetUserFeedback(userId string) ([]string, error)
• type ItemCache
  • func (c ItemCache) IsAvailable(itemId string) bool
• type LocalCache
  • func LoadLocalCache(path string) (*LocalCache, error)
  • func (c *LocalCache) WriteLocalCache() error
• type Worker
  • func NewWorker(masterHost string, masterPort int, httpHost string, httpPort, jobs int, ...) *Worker
  • func (w *Worker) Pull()
  • func (w *Worker) Recommend(users []data.User)
  • func (w *Worker) Serve()
  • func (w *Worker) ServeMetrics()
  • func (w *Worker) Sync()

Variables

var (
	UpdateUserRecommendTotal = promauto.NewGauge(prometheus.GaugeOpts{
		Namespace: "gorse",
		Subsystem: "worker",
		Name:      "update_user_recommend_total",
	})
	OfflineRecommendStepSecondsVec = promauto.NewGaugeVec(prometheus.GaugeOpts{
		Namespace: "gorse",
		Subsystem: "worker",
		Name:      "offline_recommend_step_seconds",
	}, []string{"step"})
	CollaborativeFilteringIndexRecall = promauto.NewGauge(prometheus.GaugeOpts{
		Namespace: "gorse",
		Subsystem: "worker",
		Name:      "collaborative_filtering_index_recall",
	})
)

Types

type FeedbackCache

type FeedbackCache struct {
	Types  []string
	Cache  cmap.ConcurrentMap
	Client data.Database
}

FeedbackCache is the cache for user feedbacks.

func NewFeedbackCache

func NewFeedbackCache(client data.Database, feedbackTypes ...string) *FeedbackCache

NewFeedbackCache creates a new FeedbackCache.

func (*FeedbackCache) GetUserFeedback

func (c *FeedbackCache) GetUserFeedback(userId string) ([]string, error)

GetUserFeedback gets user feedback from cache or database.

type ItemCache

type ItemCache map[string]data.Item

ItemCache is alias of map[string]data.Item.

func (ItemCache) IsAvailable

func (c ItemCache) IsAvailable(itemId string) bool

IsAvailable means the item exists in database and is not hidden.

type LocalCache

type LocalCache struct {
	WorkerName string
	// contains filtered or unexported fields
}

LocalCache for the worker node.

func LoadLocalCache

func LoadLocalCache(path string) (*LocalCache, error)

LoadLocalCache loads cache from a local file.

func (*LocalCache) WriteLocalCache

func (c *LocalCache) WriteLocalCache() error

WriteLocalCache writes cache to a local file.

type Worker

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

Worker manages states of a worker node.

func NewWorker

func NewWorker(masterHost string, masterPort int, httpHost string, httpPort, jobs int, cacheFile string) *Worker

NewWorker creates a new worker node.

func (*Worker) Pull

func (w *Worker) Pull()

Pull user index and ranking model from master.

func (*Worker) Recommend

func (w *Worker) Recommend(users []data.User)

Recommend items to users. The workflow of recommendation is: 1. Skip inactive users. 2. Load historical items. 3. Load positive items if KNN used. 4. Generate recommendation. 5. Save result. 6. Insert cold-start items into results. 7. Rank items in results by click-through-rate. 8. Refresh cache.

func (*Worker) Serve

func (w *Worker) Serve()

Serve as a worker node.

func (*Worker) ServeMetrics

func (w *Worker) ServeMetrics()

ServeMetrics serves Prometheus metrics.

func (*Worker) Sync

func (w *Worker) Sync()

Sync this worker to the master.