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consumer.go
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consumer.go
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package rocketmq
import (
"context"
"dario.cat/mergo"
"github.com/apache/rocketmq-client-go/v2"
"github.com/apache/rocketmq-client-go/v2/consumer"
"github.com/apache/rocketmq-client-go/v2/primitive"
"github.com/apache/rocketmq-client-go/v2/rlog"
"github.com/go-tron/base-error"
"github.com/go-tron/config"
"github.com/go-tron/logger"
"reflect"
"strings"
)
type DelayLevel int
const (
DelayLevel1s DelayLevel = iota + 1
DelayLevel5s
DelayLevel10s
DelayLevel30s
DelayLevel1m
DelayLevel2m
DelayLevel3m
DelayLevel4m
DelayLevel5m
DelayLevel6m
DelayLevel7m
DelayLevel8m
DelayLevel9m
DelayLevel10m
DelayLevel20m
DelayLevel30m
DelayLevel1h
DelayLevel2h
)
// The DelayLevel specify the waiting time that before next reconsume, [1s, 5s, 10s, 30s, 1m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, 20m, 30m, 1h, 2h]
type Retry struct {
MaxReconsumeTimes int32
RetryDelayLevel DelayLevel
MaxRetryDelayLevel DelayLevel
}
func NewRetry(retryDelayLevel DelayLevel, maxRetryDelayLevel DelayLevel, maxReconsumeTimes int32) *Retry {
if retryDelayLevel > maxRetryDelayLevel {
panic("retryDelayLevel must less than maxRetryDelayLevel")
}
return &Retry{
MaxReconsumeTimes: maxReconsumeTimes,
RetryDelayLevel: retryDelayLevel,
MaxRetryDelayLevel: maxRetryDelayLevel,
}
}
func defaultRetry() *Retry {
return NewRetry(DelayLevel5s, DelayLevel2h, 30)
}
type RetryStrategy interface {
Calculate(times int32) int
}
type defaultRetryStrategy struct {
*ConsumerConfig
}
func (s *defaultRetryStrategy) Calculate(times int32) int {
level := int(times) + int(s.Retry.RetryDelayLevel)
if level > int(s.Retry.MaxRetryDelayLevel) {
level = int(s.Retry.MaxRetryDelayLevel)
}
return level
}
type ConsumerConfig struct {
NameServer string
ConsumerGroup string
Topic string
Tag string
Key string
Model string
Orderly bool
Retry *Retry
RetryStrategy
RLogger logger.Logger
MsgLogger logger.Logger
}
func NewConsumerWithConfig(c *config.Config, consumer Consumer) {
NewConsumer(&ConsumerConfig{
NameServer: c.GetString("rocketmq.nameServer"),
ConsumerGroup: c.GetString("application.name"),
RLogger: logger.NewZapWithConfig(c, "rocketmq-consumer", "error"),
MsgLogger: logger.NewZapWithConfig(c, "mq-consumer", "info"),
}, consumer)
}
type Consumer interface {
Config() *ConsumerConfig
Handler(msg string) error
}
func NewConsumer(config *ConsumerConfig, c Consumer) {
if err := mergo.Merge(config, c.Config()); err != nil {
panic(err)
}
if config == nil {
panic("config 必须设置")
}
if config.NameServer == "" {
panic("NameServer 必须设置")
}
if config.ConsumerGroup == "" {
panic("ConsumerGroup 必须设置")
}
if config.RLogger == nil {
panic("RLogger 必须设置")
}
if config.MsgLogger == nil {
panic("MsgLogger 必须设置")
}
rlog.SetLogger(&Logger{config.RLogger})
if config.Model == "" {
config.Model = "clustering"
}
var model consumer.MessageModel
switch strings.ToLower(config.Model) {
case "broadcasting":
model = consumer.BroadCasting
case "clustering":
model = consumer.Clustering
default:
panic("unknown MessageModel")
}
if config.Retry == nil {
config.Retry = defaultRetry()
}
if config.RetryStrategy == nil {
config.RetryStrategy = &defaultRetryStrategy{
config,
}
}
var opts = []consumer.Option{
consumer.WithNameServer([]string{config.NameServer}),
consumer.WithGroupName(config.ConsumerGroup),
consumer.WithConsumerModel(model),
consumer.WithMaxReconsumeTimes(config.Retry.MaxReconsumeTimes),
}
if config.Orderly {
opts = append(opts,
consumer.WithConsumeFromWhere(consumer.ConsumeFromFirstOffset),
consumer.WithConsumerOrder(true))
}
pc, err := rocketmq.NewPushConsumer(opts...)
if err != nil {
panic(err)
}
selector := consumer.MessageSelector{}
if config.Tag != "" {
selector.Type = consumer.TAG
selector.Expression = config.Tag
}
if err := pc.Subscribe(config.Topic, selector, func(ctx context.Context, msgs ...*primitive.MessageExt) (consumer.ConsumeResult, error) {
var (
errs []error
minReconsumeTimes = msgs[0].ReconsumeTimes
)
for _, msg := range msgs {
if msg.ReconsumeTimes < minReconsumeTimes {
minReconsumeTimes = msg.ReconsumeTimes
}
body := string(msg.Body)
err := c.Handler(body)
if err != nil && !(reflect.TypeOf(err).String() == "*baseError.Error" && !err.(*baseError.Error).System) {
errs = append(errs, err)
}
config.MsgLogger.Info(body,
config.MsgLogger.Field("topic", msg.Topic),
config.MsgLogger.Field("tag", msg.GetTags()),
config.MsgLogger.Field("keys", msg.GetKeys()),
config.MsgLogger.Field("attempts", msg.ReconsumeTimes),
config.MsgLogger.Field("error", err),
)
}
concurrentCtx, _ := primitive.GetConcurrentlyCtx(ctx)
concurrentCtx.DelayLevelWhenNextConsume = config.RetryStrategy.Calculate(minReconsumeTimes)
if len(errs) == 0 {
return consumer.ConsumeSuccess, nil
} else {
return consumer.ConsumeRetryLater, nil
}
}); err != nil {
panic(err)
}
if err := pc.Start(); err != nil {
panic(err)
}
}