/
stream_subscriber.go
181 lines (151 loc) · 3.9 KB
/
stream_subscriber.go
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// redis
// @author LanguageY++2013 2023/5/16 17:06
// @company soulgame
package redis
import (
"fmt"
"github.com/Languege/flexmatch/common/logger"
redis_wrapper "github.com/Languege/flexmatch/common/wrappers/redis"
"github.com/Languege/flexmatch/service/match/pubsub"
"github.com/google/uuid"
"go.uber.org/zap"
"time"
"encoding/json"
"github.com/Languege/flexmatch/service/match/proto/open"
"os"
"sync"
"hash/crc32"
)
const (
defaultReadTimeOut = time.Second * 30
//默认匹配事件处理协程数
defaultEventGoroutineNum = 10
)
type RedisStreamSubscriber struct {
redis *redis_wrapper.RedisWrapper
pubsub.EventHandlers
topic string
group string
consumer string
readTimeout time.Duration
goroutineNum int
evChx []chan *open.MatchEvent
initOnce sync.Once
}
type Option func(s *RedisStreamSubscriber)
func WithConsumer(consumer string) Option {
return func(s *RedisStreamSubscriber) {
s.consumer = consumer
}
}
func WithGoroutineNum(num int) Option {
return func(s *RedisStreamSubscriber) {
s.goroutineNum = num
}
}
func WithReadTimeout(timeout time.Duration) Option {
return func(s *RedisStreamSubscriber) {
s.readTimeout = timeout
}
}
func NewRedisStreamSubscriber(conf redis_wrapper.Configure, topic string, group string, opts ...Option) *RedisStreamSubscriber {
s := &RedisStreamSubscriber{
redis: redis_wrapper.NewRedisWrapper(conf),
EventHandlers: pubsub.EventHandlers{},
topic: topic,
group: group,
consumer: uuid.NewString(),
readTimeout: defaultReadTimeOut,
goroutineNum: defaultEventGoroutineNum,
}
for _, opt := range opts {
opt(s)
}
return s
}
func (s *RedisStreamSubscriber) Name() string {
return "redis_stream"
}
func(s *RedisStreamSubscriber) consumerGroupExist(infos []*redis_wrapper.ConsumerGroup) bool {
for _, info := range infos {
if info.Name == s.group {
return true
}
}
return false
}
//init 初始化设置
func(s *RedisStreamSubscriber) init() {
infos, _ := s.redis.XInfoGroups(s.topic)
if !s.consumerGroupExist(infos) {
reply, err := s.redis.XGroupCreateFromBeginning(s.topic, s.group)
if err != nil {
logger.Panic(reply, err)
}
}
s.initOnce.Do(func() {
//初始化协程数
for i := 0; i < s.goroutineNum;i++ {
ch := make(chan *open.MatchEvent, 1)
s.evChx = append(s.evChx, ch)
go s.asyncHandler(ch)
}
})
}
func(s *RedisStreamSubscriber) asyncHandler(ch <-chan *open.MatchEvent) {
for{
select {
case ev, ok := <-ch:
if !ok {
logger.Info("async handle channel closed")
return
}
if err := s.Receive(ev); err != nil {
logger.Errorw(fmt.Sprintf("handle match event err %s ", err), zap.Any("ev", ev))
}
}
}
}
func (s *RedisStreamSubscriber) Start() {
//初始化检测
s.init()
go s.handleEvents()
}
func(s *RedisStreamSubscriber) handleEvents() {
for {
ml := []*redis_wrapper.ByteStreamEntry{}
err := s.redis.XReadGroup(s.group, s.consumer, 10, s.readTimeout, s.topic, &ml)
if err != nil {
if os.IsTimeout(err) {
logger.Infof("read group %s %s", s.group, err)
}else{
logger.DPanicf("%s XREAD, group %s topic %s err %s", s.consumer, s.group, s.topic, err)
}
continue
}
for _, msg := range ml {
ev := &open.MatchEvent{}
err := json.Unmarshal(msg.Data, ev)
if err != nil {
logger.Errorf("json unmarshal '%s' err %s", string(msg.Data), err)
goto MarkMessage
}
s.dispatch(ev)
MarkMessage:
_, err = s.redis.XAck(s.group, s.topic, msg.ID)
if err != nil {
logger.DPanicf("%s XACK ID %s , group %s topic %s err %s", s.consumer, msg.ID, s.group, s.topic, err)
}
}
}
}
func(s *RedisStreamSubscriber) dispatch(ev *open.MatchEvent) {
if ev.MatchId != "" {
shard := int(crc32.ChecksumIEEE([]byte(ev.MatchId))) % s.goroutineNum
s.evChx[shard] <- ev
}else{
if err := s.Receive(ev); err != nil {
logger.Errorw(fmt.Sprintf("handle match event err %s ", err), zap.Any("ev", ev))
}
}
}