forked from streamingfast/kvdb
/
registry.go
58 lines (49 loc) · 1.17 KB
/
registry.go
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package store
import (
"fmt"
"strings"
"go.uber.org/zap"
)
// NewStoreFunc is a function for opening a databse.
type NewStoreFunc func(path string) (KVStore, error)
type Registration struct {
Name string // unique name
Title string // human-readable name
FactoryFunc NewStoreFunc
}
var registry = make(map[string]*Registration)
func Register(reg *Registration) {
if reg.Name == "" {
zlog.Fatal("name cannot be blank")
} else if _, ok := registry[reg.Name]; ok {
zlog.Fatal("already registered", zap.String("name", reg.Name))
}
registry[reg.Name] = reg
}
func isRegistered(schemeName string) bool {
_, isRegistered := registry[schemeName]
return isRegistered
}
func New(dsn string, opts ...Option) (KVStore, error) {
chunks := strings.Split(dsn, ":")
reg, found := registry[chunks[0]]
if !found {
return nil, fmt.Errorf("no such kv store registered %q", chunks[0])
}
store, err := reg.FactoryFunc(dsn)
if err != nil {
return nil, err
}
for _, opt := range opts {
opt.apply(store)
}
return store, nil
}
// ByName returns a registered store driver
func ByName(name string) *Registration {
r, ok := registry[name]
if !ok {
return nil
}
return r
}