micro/sync/data/redis/redis.go

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2019-05-31 02:43:23 +03:00
package redis
import (
"github.com/micro/go-micro/sync/data"
redis "gopkg.in/redis.v3"
)
type rkv struct {
Client *redis.Client
}
func (r *rkv) Read(key string) (*data.Record, error) {
val, err := r.Client.Get(key).Bytes()
if err != nil && err == redis.Nil {
return nil, data.ErrNotFound
} else if err != nil {
return nil, err
}
if val == nil {
return nil, data.ErrNotFound
}
d, err := r.Client.TTL(key).Result()
if err != nil {
return nil, err
}
return &data.Record{
Key: key,
Value: val,
Expiration: d,
}, nil
}
func (r *rkv) Delete(key string) error {
return r.Client.Del(key).Err()
}
func (r *rkv) Write(record *data.Record) error {
return r.Client.Set(record.Key, record.Value, record.Expiration).Err()
}
func (r *rkv) Dump() ([]*data.Record, error) {
keys, err := r.Client.Keys("*").Result()
if err != nil {
return nil, err
}
var vals []*data.Record
for _, k := range keys {
i, err := r.Read(k)
if err != nil {
return nil, err
}
vals = append(vals, i)
}
return vals, nil
}
func (r *rkv) String() string {
return "redis"
}
func NewData(opts ...data.Option) data.Data {
var options data.Options
for _, o := range opts {
o(&options)
}
if len(options.Nodes) == 0 {
options.Nodes = []string{"127.0.0.1:6379"}
}
return &rkv{
Client: redis.NewClient(&redis.Options{
Addr: options.Nodes[0],
Password: "", // no password set
DB: 0, // use default DB
}),
}
}