piececache

package

v1.0.0 Latest Latest Go to latest Published: May 29, 2021 License: MIT Imports: 5 Imported by: 0

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Valid go.mod file
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Repository

github.com/fichain/go-file

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Documentation ¶

Index ¶

type Cache
- func New(maxSize int64, ttl time.Duration, parallelReads uint) *Cache
type Loader

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type Cache ¶

type Cache struct {
	NumCached      metrics.Meter
	NumTotal       metrics.Meter
	NumLoad        metrics.Meter
	NumLoadedBytes metrics.Meter
	// contains filtered or unexported fields
}

Cache is a LRU piece cache of certain size. Items in the cache are expired after the defined TTL.

func New ¶

func New(maxSize int64, ttl time.Duration, parallelReads uint) *Cache

New returns new Cache.

func (*Cache) Clear ¶

func (c *Cache) Clear()

Clear the cache. Drops all items in cache.

func (*Cache) Close ¶

func (c *Cache) Close()

Close the cache and release all resources.

func (*Cache) Get ¶

func (c *Cache) Get(key string, loader Loader) ([]byte, error)

Get item with the key from cache. If item is not in cache, load by calling `loader` func and put into the cache.

func (*Cache) Len ¶

func (c *Cache) Len() int

Len returns the number of items in the cache. Items may be in different sizes.

func (*Cache) LoadsActive ¶

func (c *Cache) LoadsActive() int

LoadsActive returns the number of active Loader calls.

func (*Cache) LoadsWaiting ¶

func (c *Cache) LoadsWaiting() int

LoadsWaiting returns the number of waiting Loader calls.

func (*Cache) Size ¶

func (c *Cache) Size() int64

Size returns the total size of the items in the cache.

func (*Cache) Utilization ¶

func (c *Cache) Utilization() int

Utilization is a number between 0 and 100 that returns the hit-ratio of the cache.

type Loader ¶

type Loader func() ([]byte, error)

Loader is a function that loads data from a piece.

Source Files ¶

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