consumer.go
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package consumer
import (
"context"
"errors"
"fmt"
"gitlab.fjmaimaimai.com/mmm-go/partnermg/pkg/port/consumer/configs"
"github.com/Shopify/sarama"
"github.com/astaxie/beego/logs"
cluster "github.com/bsm/sarama-cluster"
)
//MessageConsumer 消息消费者
type MessageConsumer struct {
ready chan struct{}
kafkaHosts []string
groupId string
topics []string
topicsHandles map[string]TopicHandle
// beforeHandles []TopicHandle
// afterHandles []TopicHandle
}
//实现对应的接口
var _ sarama.ConsumerGroupHandler = (*MessageConsumer)(nil)
func (c *MessageConsumer) Setup(groupSession sarama.ConsumerGroupSession) error {
close(c.ready)
return nil
}
func (c *MessageConsumer) Cleanup(groupSession sarama.ConsumerGroupSession) error {
return nil
}
func (c *MessageConsumer) ConsumeClaim(groupSession sarama.ConsumerGroupSession,
groupClaim sarama.ConsumerGroupClaim) error {
var (
topicHandle TopicHandle
err error
)
for message := range groupClaim.Messages() {
logs.Debug("Done Message claimed: timestamp = %v, topic = %s offset = %v value = %v \n",
message.Timestamp, message.Topic, message.Offset, string(message.Value))
if topicHandle, err = c.FindTopichandle(groupClaim.Topic()); err != nil {
logs.Error("FindTopichandle err:%s \n", err)
continue
}
if err = topicHandle(message); err != nil {
logs.Error("Message claimed: kafka消息处理错误 topic =", message.Topic, message.Offset, err)
}
groupSession.MarkMessage(message, "")
}
return nil
}
func (c *MessageConsumer) FindTopichandle(topic string) (TopicHandle, error) {
if v, ok := c.topicsHandles[topic]; ok {
return v, nil
}
return nil, errors.New("TopicHandle not found")
}
type Runer struct {
msgConsumer *MessageConsumer
consumerGroup sarama.ConsumerGroup
Consumer *cluster.Consumer
}
func NewRuner() *Runer {
topics := []string{}
for key := range TopicHandleRouters {
topics = append(topics, key)
}
r := &Runer{
msgConsumer: &MessageConsumer{
ready: make(chan struct{}),
kafkaHosts: configs.Cfg.Servers,
groupId: configs.Cfg.ConsumerId,
topicsHandles: TopicHandleRouters,
topics: topics,
// beforeHandles: BeforeHandles,
// afterHandles: AfterHandles,
},
}
logs.Debug("kafka_host=%v; topic=%v;groupid=%s ", r.msgConsumer.kafkaHosts,
r.msgConsumer.topics, r.msgConsumer.groupId)
return r
}
// func (r *Runer) InitConsumer() error {
// config := sarama.NewConfig()
// //config.Consumer.Group.Rebalance.Strategy = sarama.BalanceStrategyRoundRobin
// config.Consumer.Offsets.Initial = sarama.OffsetOldest
// config.Version = sarama.V0_10_2_1
// if err := config.Validate(); err != nil {
// msg := fmt.Sprintf("Kafka producer config invalidate. config: %v. err: %v", configs.Cfg, err)
// logs.Error(msg)
// panic(msg)
// }
// consumerGroup, err := sarama.NewConsumerGroup(r.msgConsumer.kafkaHosts, r.msgConsumer.groupId, config)
// if err != nil {
// return err
// }
// r.consumerGroup = consumerGroup
// return nil
// }
func (r *Runer) InitConsumer() error {
clusterCfg := cluster.NewConfig()
clusterCfg.Consumer.Return.Errors = true
clusterCfg.Consumer.Offsets.Initial = sarama.OffsetOldest
clusterCfg.Group.Return.Notifications = true
clusterCfg.Version = sarama.V0_10_2_1
khosts := []string{"192.168.0.252:9092", "192.168.0.251:9092", "192.168.0.250:9092"}
groupid := "partnermg_dev"
topic := []string{"topic_test"}
logs.Debug(r.msgConsumer.kafkaHosts, r.msgConsumer.groupId, r.msgConsumer.topics)
// consumer, err := cluster.NewConsumer(r.msgConsumer.kafkaHosts, r.msgConsumer.groupId, r.msgConsumer.topics, clusterCfg)
consumer, err := cluster.NewConsumer(khosts, groupid, topic, clusterCfg)
if err != nil {
msg := fmt.Sprintf("Create kafka consumer error: %v. config: %v", err, clusterCfg)
logs.Error(msg)
panic(msg)
}
r.Consumer = consumer
return nil
}
// func (r *Runer) Start(ctx context.Context) {
// defer func() {
// if e := recover(); e != nil {
// logs.Error(e)
// }
// }()
// for {
// select {
// case <-ctx.Done():
// logs.Warning("ctx cancel;consumerGroup.Close()")
// r.consumerGroup.Close()
// return
// default:
// if err := r.consumerGroup.Consume(ctx, r.msgConsumer.topics, r.msgConsumer); err != nil {
// logs.Error("consumerGroup err:%s \n", err)
// //等待重试
// timer := time.NewTimer(5 * time.Second)
// <-timer.C
// }
// r.msgConsumer.ready = make(chan struct{})
// }
// }
// }
func (r *Runer) Start(ctx context.Context) {
for {
select {
case msg, more := <-r.Consumer.Messages():
if more {
logs.Info("Partition:%d, Offset:%d, Key:%s, Value:%s Timestamp:%s\n", msg.Partition, msg.Offset, string(msg.Key), string(msg.Value), msg.Timestamp)
r.Consumer.MarkOffset(msg, "") // mark message as processed
}
case err, more := <-r.Consumer.Errors():
if more {
logs.Info("Kafka consumer error: %v", err.Error())
}
case ntf, more := <-r.Consumer.Notifications():
if more {
logs.Info("Kafka consumer rebalance: %v", ntf)
}
case <-ctx.Done():
logs.Info("Stop consumer server...")
r.Consumer.Close()
return
}
}
}
func (r *Runer) IsReady() <-chan struct{} {
return r.msgConsumer.ready
}