"errors"
"fmt"
"os"
+ "strconv"
+ "strings"
+ "time"
"github.com/go-redis/redis"
)
+type ChannelNotificationCb func(channel string, payload ...string)
+
+type intChannels struct {
+ addChannel chan string
+ removeChannel chan string
+ exit chan bool
+}
+
type DB struct {
- client *redis.Client
+ client RedisClient
+ subscribe SubscribeFn
redisModules bool
+ cbMap map[string]ChannelNotificationCb
+ ch intChannels
+}
+
+type Subscriber interface {
+ Channel() <-chan *redis.Message
+ Subscribe(channels ...string) error
+ Unsubscribe(channels ...string) error
+ Close() error
+}
+
+type SubscribeFn func(client RedisClient, channels ...string) Subscriber
+
+type RedisClient interface {
+ Command() *redis.CommandsInfoCmd
+ Close() error
+ Subscribe(channels ...string) *redis.PubSub
+ MSet(pairs ...interface{}) *redis.StatusCmd
+ Do(args ...interface{}) *redis.Cmd
+ MGet(keys ...string) *redis.SliceCmd
+ Del(keys ...string) *redis.IntCmd
+ Keys(pattern string) *redis.StringSliceCmd
+ SetNX(key string, value interface{}, expiration time.Duration) *redis.BoolCmd
+ SAdd(key string, members ...interface{}) *redis.IntCmd
+ SRem(key string, members ...interface{}) *redis.IntCmd
+ SMembers(key string) *redis.StringSliceCmd
+ SIsMember(key string, member interface{}) *redis.BoolCmd
+ SCard(key string) *redis.IntCmd
+ PTTL(key string) *redis.DurationCmd
+ Eval(script string, keys []string, args ...interface{}) *redis.Cmd
+ EvalSha(sha1 string, keys []string, args ...interface{}) *redis.Cmd
+ ScriptExists(scripts ...string) *redis.BoolSliceCmd
+ ScriptLoad(script string) *redis.StringCmd
+}
+
+func checkResultAndError(result interface{}, err error) (bool, error) {
+ if err != nil {
+ if err == redis.Nil {
+ return false, nil
+ }
+ return false, err
+ }
+ if result == "OK" {
+ return true, nil
+ }
+ return false, nil
+}
+
+func checkIntResultAndError(result interface{}, err error) (bool, error) {
+ if err != nil {
+ return false, err
+ }
+ if result.(int64) == int64(1) {
+ return true, nil
+ }
+ return false, nil
+}
+
+func subscribeNotifications(client RedisClient, channels ...string) Subscriber {
+ return client.Subscribe(channels...)
+}
+
+func CreateDB(client RedisClient, subscribe SubscribeFn) *DB {
+ db := DB{
+ client: client,
+ subscribe: subscribe,
+ redisModules: true,
+ cbMap: make(map[string]ChannelNotificationCb, 0),
+ ch: intChannels{
+ addChannel: make(chan string),
+ removeChannel: make(chan string),
+ exit: make(chan bool),
+ },
+ }
+
+ return &db
}
func Create() *DB {
+ var client *redis.Client
hostname := os.Getenv("DBAAS_SERVICE_HOST")
if hostname == "" {
hostname = "localhost"
if port == "" {
port = "6379"
}
- redisAddress := hostname + ":" + port
- client := redis.NewClient(&redis.Options{
- Addr: redisAddress,
- Password: "", // no password set
- DB: 0, // use default DB
- PoolSize: 20,
- })
-
- db := DB{
- client: client,
- redisModules: true,
+ sentinelPort := os.Getenv("DBAAS_SERVICE_SENTINEL_PORT")
+ masterName := os.Getenv("DBAAS_MASTER_NAME")
+ if sentinelPort == "" {
+ redisAddress := hostname + ":" + port
+ client = redis.NewClient(&redis.Options{
+ Addr: redisAddress,
+ Password: "", // no password set
+ DB: 0, // use default DB
+ PoolSize: 20,
+ MaxRetries: 2,
+ })
+ } else {
+ sentinelAddress := hostname + ":" + sentinelPort
+ client = redis.NewFailoverClient(&redis.FailoverOptions{
+ MasterName: masterName,
+ SentinelAddrs: []string{sentinelAddress},
+ PoolSize: 20,
+ MaxRetries: 2,
+ })
}
+ db := CreateDB(client, subscribeNotifications)
+ db.CheckCommands()
+ return db
+}
+func (db *DB) CheckCommands() {
commands, err := db.client.Command().Result()
if err == nil {
- redisModuleCommands := []string{"setie", "delie"}
+ redisModuleCommands := []string{"setie", "delie", "setiepub", "setnxpub",
+ "msetmpub", "delmpub"}
for _, v := range redisModuleCommands {
_, ok := commands[v]
if !ok {
} else {
fmt.Println(err)
}
- return &db
}
func (db *DB) CloseDB() error {
return db.client.Close()
}
+func (db *DB) UnsubscribeChannelDB(channels ...string) {
+ for _, v := range channels {
+ db.ch.removeChannel <- v
+ delete(db.cbMap, v)
+ if len(db.cbMap) == 0 {
+ db.ch.exit <- true
+ }
+ }
+}
+
+func (db *DB) SubscribeChannelDB(cb ChannelNotificationCb, channelPrefix, eventSeparator string, channels ...string) {
+ if len(db.cbMap) == 0 {
+ for _, v := range channels {
+ db.cbMap[v] = cb
+ }
+
+ go func(cbMap *map[string]ChannelNotificationCb,
+ channelPrefix,
+ eventSeparator string,
+ ch intChannels,
+ channels ...string) {
+ sub := db.subscribe(db.client, channels...)
+ rxChannel := sub.Channel()
+ for {
+ select {
+ case msg := <-rxChannel:
+ cb, ok := (*cbMap)[msg.Channel]
+ if ok {
+ cb(strings.TrimPrefix(msg.Channel, channelPrefix), strings.Split(msg.Payload, eventSeparator)...)
+ }
+ case channel := <-ch.addChannel:
+ sub.Subscribe(channel)
+ case channel := <-ch.removeChannel:
+ sub.Unsubscribe(channel)
+ case exit := <-ch.exit:
+ if exit {
+ if err := sub.Close(); err != nil {
+ fmt.Println(err)
+ }
+ return
+ }
+ }
+ }
+ }(&db.cbMap, channelPrefix, eventSeparator, db.ch, channels...)
+
+ } else {
+ for _, v := range channels {
+ db.cbMap[v] = cb
+ db.ch.addChannel <- v
+ }
+ }
+}
+
func (db *DB) MSet(pairs ...interface{}) error {
return db.client.MSet(pairs...).Err()
}
+func (db *DB) MSetMPub(channelsAndEvents []string, pairs ...interface{}) error {
+ if !db.redisModules {
+ return errors.New("Redis deployment doesn't support MSETMPUB command")
+ }
+ command := make([]interface{}, 0)
+ command = append(command, "MSETMPUB")
+ command = append(command, len(pairs)/2)
+ command = append(command, len(channelsAndEvents)/2)
+ for _, d := range pairs {
+ command = append(command, d)
+ }
+ for _, d := range channelsAndEvents {
+ command = append(command, d)
+ }
+ _, err := db.client.Do(command...).Result()
+ return err
+}
+
func (db *DB) MGet(keys []string) ([]interface{}, error) {
- val, err := db.client.MGet(keys...).Result()
- return val, err
+ return db.client.MGet(keys...).Result()
+}
+
+func (db *DB) DelMPub(channelsAndEvents []string, keys []string) error {
+ if !db.redisModules {
+ return errors.New("Redis deployment not supporting command DELMPUB")
+ }
+ command := make([]interface{}, 0)
+ command = append(command, "DELMPUB")
+ command = append(command, len(keys))
+ command = append(command, len(channelsAndEvents)/2)
+ for _, d := range keys {
+ command = append(command, d)
+ }
+ for _, d := range channelsAndEvents {
+ command = append(command, d)
+ }
+ _, err := db.client.Do(command...).Result()
+ return err
+
}
func (db *DB) Del(keys []string) error {
}
func (db *DB) Keys(pattern string) ([]string, error) {
- val, err := db.client.Keys(pattern).Result()
- return val, err
+ return db.client.Keys(pattern).Result()
}
func (db *DB) SetIE(key string, oldData, newData interface{}) (bool, error) {
return false, errors.New("Redis deployment not supporting command")
}
- result, err := db.client.Do("SETIE", key, newData, oldData).Result()
- if err != nil {
- return false, err
+ return checkResultAndError(db.client.Do("SETIE", key, newData, oldData).Result())
+}
+
+func (db *DB) SetIEPub(channel, message, key string, oldData, newData interface{}) (bool, error) {
+ if !db.redisModules {
+ return false, errors.New("Redis deployment not supporting command SETIEPUB")
}
- if result == "OK" {
- return true, nil
- } else {
- return false, nil
+ return checkResultAndError(db.client.Do("SETIEPUB", key, newData, oldData, channel, message).Result())
+}
+
+func (db *DB) SetNXPub(channel, message, key string, data interface{}) (bool, error) {
+ if !db.redisModules {
+ return false, errors.New("Redis deployment not supporting command SETNXPUB")
}
+ return checkResultAndError(db.client.Do("SETNXPUB", key, data, channel, message).Result())
+}
+func (db *DB) SetNX(key string, data interface{}, expiration time.Duration) (bool, error) {
+ return db.client.SetNX(key, data, expiration).Result()
}
-func (db *DB) SetNX(key string, data interface{}) (bool, error) {
- result, err := db.client.SetNX(key, data, 0).Result()
- return result, err
+func (db *DB) DelIEPub(channel, message, key string, data interface{}) (bool, error) {
+ if !db.redisModules {
+ return false, errors.New("Redis deployment not supporting command")
+ }
+ return checkIntResultAndError(db.client.Do("DELIEPUB", key, data, channel, message).Result())
}
func (db *DB) DelIE(key string, data interface{}) (bool, error) {
if !db.redisModules {
return false, errors.New("Redis deployment not supporting command")
}
- result, err := db.client.Do("DELIE", key, data).Result()
+ return checkIntResultAndError(db.client.Do("DELIE", key, data).Result())
+}
+
+func (db *DB) SAdd(key string, data ...interface{}) error {
+ _, err := db.client.SAdd(key, data...).Result()
+ return err
+}
+
+func (db *DB) SRem(key string, data ...interface{}) error {
+ _, err := db.client.SRem(key, data...).Result()
+ return err
+}
+
+func (db *DB) SMembers(key string) ([]string, error) {
+ result, err := db.client.SMembers(key).Result()
+ return result, err
+}
+
+func (db *DB) SIsMember(key string, data interface{}) (bool, error) {
+ result, err := db.client.SIsMember(key, data).Result()
+ return result, err
+}
+
+func (db *DB) SCard(key string) (int64, error) {
+ result, err := db.client.SCard(key).Result()
+ return result, err
+}
+
+func (db *DB) PTTL(key string) (time.Duration, error) {
+ result, err := db.client.PTTL(key).Result()
+ return result, err
+}
+
+var luaRefresh = redis.NewScript(`if redis.call("get", KEYS[1]) == ARGV[1] then return redis.call("pexpire", KEYS[1], ARGV[2]) else return 0 end`)
+
+func (db *DB) PExpireIE(key string, data interface{}, expiration time.Duration) error {
+ expirationStr := strconv.FormatInt(int64(expiration/time.Millisecond), 10)
+ result, err := luaRefresh.Run(db.client, []string{key}, data, expirationStr).Result()
if err != nil {
- return false, err
+ return err
}
- if result == "1" {
- return true, nil
+ if result == int64(1) {
+ return nil
}
- return false, nil
+ return errors.New("Lock not held")
}
Code Review / ric-plt / sdlgo.git / blobdiff