Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
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Types ¶
type Cache ¶
type Cache interface {
Get(key string, parameters imageserver.Parameters) (*imageserver.Image, error)
Set(key string, image *imageserver.Image, parameters imageserver.Parameters) error
}
Cache represents an Image cache
The Get() method must return a CacheMissError if it is a cache related problem.
The "parameters" argument can be used for custom behavior (no-cache, expiration, ...)
type CacheImageServer ¶
type CacheImageServer struct {
ImageServer imageserver.ImageServerInterface
Cache
KeyGenerator
}
CacheImageServer represents an Image server with Cache
It wraps an ImageServer.
func (*CacheImageServer) Get ¶
func (cis *CacheImageServer) Get(parameters imageserver.Parameters) (*imageserver.Image, error)
Get wraps the call to the underlying ImageServer and Get from/Set to the Cache
type CacheMissError ¶
CacheMissError represents a cache miss error (no image found or cache not available)
func NewCacheMissError ¶
func NewCacheMissError(key string, cache Cache, previous error) *CacheMissError
NewCacheMissError creates a new CacheMissError
func (*CacheMissError) Error ¶
func (err *CacheMissError) Error() string
type KeyGenerator ¶
type KeyGenerator interface {
GetKey(imageserver.Parameters) string
}
KeyGenerator generates a Cache key
type KeyGeneratorFunc ¶
type KeyGeneratorFunc func(imageserver.Parameters) string
KeyGeneratorFunc is a KeyGenerator func
func NewParametersHashKeyGeneratorFunc ¶
func NewParametersHashKeyGeneratorFunc(newHashFunc func() hash.Hash) KeyGeneratorFunc
NewParametersHashKeyGeneratorFunc returns a KeyGeneratorFunc that hashes the Parameters
func (KeyGeneratorFunc) GetKey ¶
func (f KeyGeneratorFunc) GetKey(parameters imageserver.Parameters) string
GetKey calls the func
Source Files
Directories
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| Path | Synopsis |
|---|---|
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Package _test provides utilities for cache testing
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Package _test provides utilities for cache testing |
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Package async provides an asynchronous cache
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Package async provides an asynchronous cache |
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Package list provides a list of Image Cache
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Package list provides a list of Image Cache |
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Package memcache provides a Memcache Image Cache
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Package memcache provides a Memcache Image Cache |
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Package memory provides an in-memory Image Cache
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Package memory provides an in-memory Image Cache |
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Package redis provides a Redis Image Cache
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Package redis provides a Redis Image Cache |
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