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package cache
import (
"fmt"
"github.com/argoproj-labs/argocd-image-updater/registry-scanner/pkg/tag"
memcache "github.com/patrickmn/go-cache"
)
type MemCache struct {
cache *memcache.Cache
}
// NewMemCache returns a new instance of MemCache
func NewMemCache() ImageTagCache {
mc := MemCache{}
c := memcache.New(0, 0)
mc.cache = c
return &mc
}
// HasTag returns true if cache has entry for given tag, false if not
func (mc *MemCache) HasTag(imageName string, tagName string) bool {
tag, err := mc.GetTag(imageName, tagName)
if err != nil || tag == nil {
return false
} else {
return true
}
}
// SetTag sets a tag entry into the cache
func (mc *MemCache) SetTag(imageName string, imgTag *tag.ImageTag) {
mc.cache.Set(tagCacheKey(imageName, imgTag.TagName), *imgTag, -1)
}
// GetTag gets a tag entry from the cache
func (mc *MemCache) GetTag(imageName string, tagName string) (*tag.ImageTag, error) {
var imgTag tag.ImageTag
e, ok := mc.cache.Get(tagCacheKey(imageName, tagName))
if !ok {
return nil, nil
}
imgTag, ok = e.(tag.ImageTag)
if !ok {
return nil, fmt.Errorf("")
}
return &imgTag, nil
}
func (mc *MemCache) SetImage(imageName, application string) {
mc.cache.Set(imageCacheKey(imageName), application, -1)
}
// ClearCache clears the cache
func (mc *MemCache) ClearCache() {
for k := range mc.cache.Items() {
mc.cache.Delete(k)
}
}
// NumEntries returns the number of entries in the cache
func (mc *MemCache) NumEntries() int {
return mc.cache.ItemCount()
}
func tagCacheKey(imageName, imageTag string) string {
return fmt.Sprintf("tags:%s:%s", imageName, imageTag)
}
func imageCacheKey(imageName string) string {
return fmt.Sprintf("image:%s", imageName)
}
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