cacher

package
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Published: Jul 29, 2013 License: Apache-2.0 Imports: 8 Imported by: 0

Documentation

Overview

Package cacher provides various blobref fetching caching mechanisms.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type CachingFetcher

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

A CachingFetcher is a blobref.StreamingFetcher and a blobref.SeekFetcher.

func NewCachingFetcher

func NewCachingFetcher(cache blobserver.Cache, fetcher blobref.StreamingFetcher) *CachingFetcher

NewCachingFetcher returns a CachingFetcher that fetches from fetcher and writes to and serves from cache.

func (*CachingFetcher) Fetch

func (cf *CachingFetcher) Fetch(br *blobref.BlobRef) (file types.ReadSeekCloser, size int64, err error)

func (*CachingFetcher) FetchStreaming

func (cf *CachingFetcher) FetchStreaming(br *blobref.BlobRef) (file io.ReadCloser, size int64, err error)

type DiskCache

type DiskCache struct {
	*CachingFetcher

	// Root is the temp directory being used to store files.
	// It is available mostly for debug printing.
	Root string
}

A DiskCache is a blobref.StreamingFetcher and blobref.SeekFetcher that serves from a local temp directory and is backed by a another blobref.StreamingFetcher (usually the pkg/client HTTP client).

func NewDiskCache

func NewDiskCache(fetcher blobref.StreamingFetcher) (*DiskCache, error)

NewDiskCache returns a new DiskCache from a StreamingFetcher, which is usually the pkg/client HTTP client (which typically has much higher latency and lower bandwidth than local disk).

func (*DiskCache) Clean

func (dc *DiskCache) Clean()

Clean cleans some or all of the DiskCache.

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