forked from TheThingsArchive/ttn
/
redis_set_store.go
142 lines (122 loc) · 3.51 KB
/
redis_set_store.go
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// Copyright © 2016 The Things Network
// Use of this source code is governed by the MIT license that can be found in the LICENSE file.
package storage
import (
"sort"
"strings"
"github.com/TheThingsNetwork/ttn/utils/errors"
"gopkg.in/redis.v5"
)
// RedisSetStore stores sets in Redis
type RedisSetStore struct {
prefix string
client *redis.Client
}
// NewRedisSetStore creates a new RedisSetStore
func NewRedisSetStore(client *redis.Client, prefix string) *RedisSetStore {
if !strings.HasSuffix(prefix, ":") {
prefix += ":"
}
return &RedisSetStore{
client: client,
prefix: prefix,
}
}
// GetAll returns all results for the given keys, prepending the prefix to the keys if necessary
func (s *RedisSetStore) GetAll(keys []string, options *ListOptions) (map[string][]string, error) {
for i, key := range keys {
if !strings.HasPrefix(key, s.prefix) {
keys[i] = s.prefix + key
}
}
sort.Strings(keys)
selectedKeys := selectKeys(keys, options)
pipe := s.client.Pipeline()
defer pipe.Close()
// Add all commands to pipeline
cmds := make(map[string]*redis.StringSliceCmd)
for _, key := range selectedKeys {
cmds[key] = pipe.SMembers(key)
}
// Execute pipeline
_, err := pipe.Exec()
if err != nil {
return nil, err
}
// Get all results from pipeline
data := make(map[string][]string)
for key, cmd := range cmds {
res, err := cmd.Result()
if err == nil {
sort.Strings(res)
data[strings.TrimPrefix(key, s.prefix)] = res
}
}
return data, nil
}
// List all results matching the selector, prepending the prefix to the selector if necessary
func (s *RedisSetStore) List(selector string, options *ListOptions) (map[string][]string, error) {
if selector == "" {
selector = "*"
}
if !strings.HasPrefix(selector, s.prefix) {
selector = s.prefix + selector
}
keys, err := s.client.Keys(selector).Result()
if err != nil {
return nil, err
}
return s.GetAll(keys, options)
}
// Get one result, prepending the prefix to the key if necessary
func (s *RedisSetStore) Get(key string) (res []string, err error) {
if !strings.HasPrefix(key, s.prefix) {
key = s.prefix + key
}
res, err = s.client.SMembers(key).Result()
if err == redis.Nil || len(res) == 0 {
return res, errors.NewErrNotFound(key)
}
sort.Strings(res)
return res, err
}
// Contains returns wheter the set contains a given value, prepending the prefix to the key if necessary
func (s *RedisSetStore) Contains(key string, value string) (res bool, err error) {
if !strings.HasPrefix(key, s.prefix) {
key = s.prefix + key
}
res, err = s.client.SIsMember(key, value).Result()
if err == redis.Nil {
return res, errors.NewErrNotFound(key)
}
return res, err
}
// Add one or more values to the set, prepending the prefix to the key if necessary
func (s *RedisSetStore) Add(key string, values ...string) error {
if !strings.HasPrefix(key, s.prefix) {
key = s.prefix + key
}
var valuesI []interface{}
for _, v := range values {
valuesI = append(valuesI, v)
}
return s.client.SAdd(key, valuesI...).Err()
}
// Remove one or more values from the set, prepending the prefix to the key if necessary
func (s *RedisSetStore) Remove(key string, values ...string) error {
if !strings.HasPrefix(key, s.prefix) {
key = s.prefix + key
}
var valuesI []interface{}
for _, v := range values {
valuesI = append(valuesI, v)
}
return s.client.SRem(key, valuesI...).Err()
}
// Delete the entire set
func (s *RedisSetStore) Delete(key string) error {
if !strings.HasPrefix(key, s.prefix) {
key = s.prefix + key
}
return s.client.Del(key).Err()
}