// LEVELDB恢复到REDIS的具体实现
func restore(ud interface{}, key string, cli *redis.Redis) (err error) {
context := ud.(*Context)
db := context.db
var chunk []byte
if chunk, err = db.Get([]byte(key)); err != nil {
Error("query key %s failed:%v", key, err)
return
}
if chunk == nil {
err = errors.New("key doesn't exist on leveldb")
return
}
var leveldb_data map[string]string
err = json.Unmarshal(chunk, &leveldb_data)
if err != nil {
Error("chunk is not json:%s", key)
return
}
redis_data := make(map[string]string)
err = cli.Hgetall(key, redis_data)
if err != nil {
Error("hgetall key %s failed:%v", key, err)
return
}
if redis_data["version"] >= leveldb_data["version"] && len(redis_data) > 0 {
Info("redis_data[version]:%s >= leveldb_data[version]:%s", redis_data["version"], leveldb_data["version"])
return
}
leveldb_array := make([]interface{}, len(leveldb_data)*2+1)
leveldb_array[0] = key
i := 1
for k, v := range leveldb_data {
leveldb_array[i] = k
leveldb_array[i+1] = v
i = i + 2
}
_, err = cli.Exec("hmset", leveldb_array...)
if err != nil {
Error("hmset key %s failed:%v", key, err)
return
}
return
}
