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storage.go
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/
storage.go
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package storage
import (
"fmt"
)
type (
Engine interface {
Initializer(opts string) error
HSet(key, field string, value interface{}, maxLen, expire int64) error
HScan(key string, do func(field, token string, ttl float64)) error
HGet(key, field string) (string, float64, error)
HRem(key string, field ... string) error
}
)
var provider = make(map[string]Engine)
func Register(name string, driver Engine) {
if driver == nil {
panic("storage: register driver is nil")
}
if _, find := provider[name]; find {
panic("storage: register called twice for " + name)
}
provider[name] = driver
}
func New(name string, opts string) (*Engine, error) {
if storage, find := provider[name]; !find {
return nil, fmt.Errorf("storage: unknown driver %q (forgotten import?)", name)
} else {
if err := storage.Initializer(opts); err != nil {
return nil, fmt.Errorf("storage: %q driver init failed", name);
}
return &storage, nil;
}
}