/
store.go
121 lines (109 loc) · 2.83 KB
/
store.go
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Original source: github.com/micro/go-micro/v3/config/store/store.go
package store
import (
"encoding/json"
"strings"
"github.com/micro/micro/v3/service/config"
"github.com/micro/micro/v3/service/store"
)
// NewConfig returns new config
func NewConfig(store store.Store, key string) (config.Config, error) {
return newConfig(store, key)
}
type conf struct {
key string
store store.Store
}
func newConfig(store store.Store, key string) (*conf, error) {
return &conf{
store: store,
key: key,
}, nil
}
func (c *conf) Get(path string, options ...config.Option) (config.Value, error) {
rec, err := c.store.Read(c.key)
dat := []byte("{}")
if err == nil && len(rec) > 0 {
dat = rec[0].Value
}
values := config.NewJSONValues(dat)
return values.Get(path), nil
}
func (c *conf) Set(path string, val interface{}, options ...config.Option) error {
rec, err := c.store.Read(c.key)
dat := []byte("{}")
if err == nil && len(rec) > 0 {
dat = rec[0].Value
}
values := config.NewJSONValues(dat)
// marshal to JSON and back so we can iterate on the
// value without reflection
// @todo only do this if a struct
JSON, err := json.Marshal(val)
if err != nil {
return err
}
var v interface{}
err = json.Unmarshal(JSON, &v)
if err != nil {
return err
}
m, ok := v.(map[string]interface{})
if ok {
err := traverse(m, []string{path}, func(p string, value interface{}) error {
values.Set(p, value)
return nil
})
if err != nil {
return err
}
} else {
values.Set(path, val)
}
return c.store.Write(&store.Record{
Key: c.key,
Value: values.Bytes(),
})
}
func traverse(m map[string]interface{}, paths []string, callback func(path string, value interface{}) error) error {
for k, v := range m {
val, ok := v.(map[string]interface{})
if !ok {
err := callback(strings.Join(append(paths, k), "."), v)
if err != nil {
return err
}
continue
}
err := traverse(val, append(paths, k), callback)
if err != nil {
return err
}
}
return nil
}
func (c *conf) Delete(path string, options ...config.Option) error {
rec, err := c.store.Read(c.key)
dat := []byte("{}")
if err != nil || len(rec) == 0 {
return nil
}
values := config.NewJSONValues(dat)
values.Delete(path)
return c.store.Write(&store.Record{
Key: c.key,
Value: values.Bytes(),
})
}