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How to use ConsumeClaim method of kafka Package

Best Venom code snippet using kafka.ConsumeClaim

kafka_client.go

Source:kafka_client.go

...138	w                  *KafkaClient139	taskCallback       func(t *Task) *TaskResult140	compensateCallback func(t *Task) *TaskResult141}142// Setup is run at the beginning of a new session, before ConsumeClaim143func (wh *workerHandler) Setup(sarama.ConsumerGroupSession) error { return nil }144// Cleanup is run at the end of a session, once all ConsumeClaim goroutines have exited145func (wh *workerHandler) Cleanup(sarama.ConsumerGroupSession) error { return nil }146// ConsumeClaim must start a consumer loop of ConsumerGroupClaim's Messages().147func (wh *workerHandler) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {148	var wg sync.WaitGroup149	for m := range claim.Messages() {150		wg.Add(1)151		go func(m *sarama.ConsumerMessage) {152			defer wg.Done()153			currentMillis := time.Now().UnixNano() / int64(time.Millisecond)154			t := Task{}155			if err := json.Unmarshal(m.Value, &t); err != nil {156				fmt.Println("Bad payload", err, m.Topic, m.Partition, m.Offset)157				return158			}159			elapsedTime := int(currentMillis - t.StartTime)160			if t.AckTimeout > 0 && t.AckTimeout < elapsedTime || t.Timeout > 0 && t.Timeout < elapsedTime {161				fmt.Printf(`Already timeout: %s`, t.TaskID)162				return163			}164			tr := NewTaskResult(&t)165			tr.Status = TaskStatusInProgress166			wh.w.UpdateTask(tr)167			defer func() {168				if err := recover(); err != nil {169					tr.Status = TaskStatusFailed170					tr.Output = fmt.Sprintf("callback error: %v", err)171					wh.w.UpdateTask(tr)172				}173			}()174			switch t.Type {175			case TaskTypeTask:176				tr = wh.taskCallback(&t)177				wh.w.UpdateTask(tr)178			case TaskTypeCompensate:179				tr = wh.compensateCallback(&t)180				wh.w.UpdateTask(tr)181			default:182				tr.Status = TaskStatusFailed183				tr.Output = "Unknown task type"184				wh.w.UpdateTask(tr)185			}186			session.MarkMessage(m, "")187		}(m)188	}189	wg.Wait() // Wait for every task ran before pull for new batch190	return nil191}192// eventWatcherHandler193type eventWatcherHandler struct {194	w  *KafkaClient195	ch chan interface{}196}197// Setup is run at the beginning of a new session, before ConsumeClaim198func (eh *eventWatcherHandler) Setup(sarama.ConsumerGroupSession) error { return nil }199// Cleanup is run at the end of a session, once all ConsumeClaim goroutines have exited200func (eh *eventWatcherHandler) Cleanup(sarama.ConsumerGroupSession) error { return nil }201// ConsumeClaim must start a consumer loop of ConsumerGroupClaim's Messages().202func (eh *eventWatcherHandler) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {203	for m := range claim.Messages() {204		go func(m *sarama.ConsumerMessage) {205			session.MarkMessage(m, "")206			var be BaseEvent207			err := json.Unmarshal(m.Value, &be)208			if err != nil {209				log.Println(err)210				return211			}212			if be.IsError == true {213				switch be.Type {214				case EventTypeTransaction:215					var e EventTransactionError216					err := json.Unmarshal(m.Value, &e)...

sarama.go

Source:sarama.go

...106// 	<-p.ready107// 	glog.Warningf("kafka consumer up and running...")108// 	return close109// }110// // Setup is run at the beginning of a new session, before ConsumeClaim111// func (p *Consumer) Setup(sarama.ConsumerGroupSession) error {112// 	// Mark the consumer as ready113// 	close(p.ready)114// 	return nil115// }116// // Cleanup is run at the end of a session, once all ConsumeClaim goroutines have exited117// func (p *Consumer) Cleanup(sarama.ConsumerGroupSession) error {118// 	return nil119// }120// // ConsumeClaim must start a consumer loop of ConsumerGroupClaim's Messages().121// func (p *Consumer) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {122// 	// NOTE:123// 	// Do not move the code below to a goroutine.124// 	// The `ConsumeClaim` itself is called within a goroutine, see:125// 	// https://github.com/Shopify/sarama/blob/master/consumer_group.go#L27-L29126// 	// å·ä½æ¶è´¹æ¶æ¯127// 	if *config.Config.ChOpen {128// 		for message := range claim.Messages() {129// 			msg := string(message.Value)130// 			p.chPool <- msg131// 			glog.Infof("msg: %s, %v, %v", msg, config.Config.ChOpen)132// 			time.Sleep(time.Second)133// 			// æ´æ°ä½ç§»134// 			session.MarkMessage(message, "")135// 		}136// 	} else {137// 		glog.Infof("æåæ¶è´¹msg:%v.", config.Config.ChOpen)138// 		time.Sleep(time.Second)139// 	}140// 	/*141// 		for {142// 			// if len(p.chOpen) == 0 {143// 			select {144// 			case p.chOpen <- 1:145// 			case message, ok := <-claim.Messages():146// 				if !ok {147// 					continue148// 				}149// 				msg := string(message.Value)150// 				<-p.chOpen151// 				p.chPool <- msg152// 				glog.Infof("msg: %s, %v, %v", msg, len(p.chOpen), &p.chOpen)153// 				time.Sleep(time.Second)154// 				// æ´æ°ä½ç§»155// 				session.MarkMessage(message, "")156// 				continue157// 			default:158// 				glog.Infof("msg default.")159// 				// time.Sleep(time.Second)160// 				break161// 			}162// 			// } else {163// 			// 	time.Sleep(time.Second)164// 			// }165// 		}166// 	*/167// 	glog.Infof("ConsumeClaim...")168// 	return nil169// }170// // func main() {171// // 	k := NewKafka()172// // 	f := k.Init()173// // 	sigterm := make(chan os.Signal, 1)174// // 	signal.Notify(sigterm, syscall.SIGINT, syscall.SIGTERM)175// // 	select {176// // 	case <-sigterm:177// // 		glog.Infof("terminating: via signal")178// // 	}179// // 	f()180// // }181// /*...

kafka.go

Source:kafka.go

...30	return nil31}32// Cleanup sarama.ConsumerGroupHandleræ¥å£å®ä¹å®ç°.33// Cleanup() hook is called to allow the user to perform any final tasks34// before a rebalance once all the ConsumeClaim() loops have exited.35func (h *CustomConsumerGroupHandler) Cleanup(session sarama.ConsumerGroupSession) error {36	return nil37}38// ConsumeClaim sarama.ConsumerGroupHandleræ¥å£å®ä¹å®ç°.39// ConsumeClaim() hook is called for each of the assigned claims.40func (h *CustomConsumerGroupHandler) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {41	for {42		select {43		case <-session.Context().Done():44			{45				log.Info().Msg("consumer group claim, context done")46				return nil47			}48		case msg, ok := <-claim.Messages():49			{50				if !ok {51					log.Warn().Msg("consumer group claim, messages channel closed")52					return nil53				}54				h.msgCh <- msg55				session.MarkMessage(msg, "")56			}57		}58	}59}60// Close å³éå¹¶éæ¾ææèµæº (å¹¶åå®å¨).61func (h *CustomConsumerGroupHandler) Close() {62	h.once.Do(func() { h.closer() })63	log.Info().Msg("unload kafka plugin")64}65// NewCustomConsumerGroupHandler æ°å»ºæ¶è´¹è.66func NewCustomConsumerGroupHandler(cfg *conf.KafkaConfig) (*CustomConsumerGroupHandler, error) {67	h := &CustomConsumerGroupHandler{68		cfg:     cfg,69		msgCh:   make(chan *sarama.ConsumerMessage),70		readyCh: make(chan struct{}),71	}72	var err error73	sc := sarama.NewConfig()74	sc.Version, err = sarama.ParseKafkaVersion(h.cfg.Version)75	if cfg.FromOldest {76		sc.Consumer.Offsets.Initial = sarama.OffsetOldest77	}78	if err != nil {79		log.Error().Err(err).Msgf("unsupported kafka version %s", h.cfg.Version)80		return nil, err81	}82	setKafkaAccessSettings(sc)83	h.consumerGroup, err = sarama.NewConsumerGroup(h.cfg.Brokers, h.cfg.ConsumeGroup, sc)84	if err != nil {85		log.Error().Err(err).Msgf("cannot create consumer group for brokers <%v>", h.cfg.Brokers)86		return nil, err87	}88	ctx, cancel := context.WithCancel(context.Background())89	kGroup := new(sync.WaitGroup)90	kGroup.Add(1)91	go func() {92		defer kGroup.Done()93		h.start(ctx, h.cfg.Topic)94	}()95	// æ¶è´¹ç»åå¤å®æ¯96	<-h.readyCh97	h.closer = func() {98		cancel()99		h.consumerGroup.Close()100		close(h.msgCh)101		kGroup.Wait()102	}103	log.Info().Msgf("load kafka plugin, version %s", h.cfg.Version)104	return h, nil105}106func (h *CustomConsumerGroupHandler) start(ctx context.Context, topics []string) {107	for {108		// Consume joins a cluster of consumers for a given list of topics and109		// starts a blocking ConsumerGroupSession through the ConsumerGroupHandler.110		if err := h.consumerGroup.Consume(ctx, topics, h); err != nil {111			log.Error().Err(err).Msg("error occurs inside consumer group")112		}113		// 1. The consumers join the group (as explained in https://kafka.apache.org/documentation/#intro_consumers)114		//    and is assigned their "fair share" of partitions, aka 'claims'.115		// 2. Before processing starts, the handler's Setup() hook is called to notify the user116		//    of the claims and allow any necessary preparation or alteration of state.117		// 3. For each of the assigned claims the handler's ConsumeClaim() function is then called118		//    in a separate goroutine which requires it to be thread-safe. Any state must be carefully protected119		//    from concurrent reads/writes.120		// 4. The session will persist until one of the ConsumeClaim() functions exits. This can be either when the121		//    parent context is cancelled or when a server-side rebalance cycle is initiated.122		// 5. Once all the ConsumeClaim() loops have exited, the handler's Cleanup() hook is called123		//    to allow the user to perform any final tasks before a rebalance.124		// 6. Finally, marked offsets are committed one last time before claims are released.125		//126		// Please note, that once a rebalance is triggered, sessions must be completed within127		// Config.Consumer.Group.Rebalance.Timeout. This means that ConsumeClaim() functions must exit128		// as quickly as possible to allow time for Cleanup() and the final offset commit. If the timeout129		// is exceeded, the consumer will be removed from the group by Kafka, which will cause offset130		// commit failures.131		select {132		case <-ctx.Done():133			{134				log.Info().Msg("consumer group context done ...")135				return136			}137		case err := <-h.consumerGroup.Errors():138			{139				log.Error().Err(err).Msg("error occurs inside consumer group")140			}141		default:...

ConsumeClaim

Using AI Code Generation

1func (c *Consumer) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {2	for message := range claim.Messages() {3		fmt.Printf("Message claimed: value = %s, timestamp = %v, topic = %s4", string(message.Value), message.Timestamp, message.Topic)5		session.MarkMessage(message, "")6	}7}8func (c *Consumer) Consume(ctx context.Context) {9	for {10		topics := []string{"test"}11		err := c.consumer.Consume(ctx, topics, handler)12		if err != nil {13			panic(err)14		}15		if ctx.Err() != nil {16		}17	}18}19func (c *Consumer) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {20	for message := range claim.Messages() {21		fmt.Printf("Message claimed: value = %s, timestamp = %v, topic = %s22", string(message.Value), message.Timestamp, message.Topic)23		session.MarkMessage(message, "")24	}25}26func (c *Consumer) Consume(ctx context.Context) {27	for {28		topics := []string{"test"}29		err := c.consumer.Consume(ctx, topics, handler)30		if err != nil {31			panic(err)32		}33		if ctx.Err() != nil {34		}35	}36}37func (c *Consumer) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {38	for message := range claim.Messages() {39		fmt.Printf("Message claimed: value = %s, timestamp = %v, topic = %s40", string(message.Value), message.Timestamp, message.Topic)41		session.MarkMessage(message, "")42	}43}44func (c *Consumer) Consume(ctx context.Context) {45	for {

ConsumeClaim

Using AI Code Generation

1func (c *KafkaConsumer) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {2	for msg := range claim.Messages() {3		fmt.Printf("Message claimed: value = %s, timestamp = %v, topic = %s4", string(msg.Value), msg.Timestamp, msg.Topic)5		session.MarkMessage(msg, "")6	}7}8func (c *KafkaConsumer) Close() error {9	if err := c.consumer.Close(); err != nil {10	}11}12func (c *KafkaConsumer) Setup(sarama.ConsumerGroupSession) error   { return nil }13func (c *KafkaConsumer) Cleanup(sarama.ConsumerGroupSession) error { return nil }14func (c *KafkaConsumer) Run() {15	for {16		if err := c.consumer.Consume(context.Background(), []string{c.topic}, c); err != nil {17			fmt.Println(err)18		}19		if ctx.Err() != nil {20		}21		c.ready = make(chan bool)22	}23}24func NewConsumerGroup(brokers, topic, group string) (*KafkaConsumer, error) {25	config := sarama.NewConfig()26	client, err := sarama.NewConsumerGroup(strings.Split(brokers, ","), group, config)27	if err != nil {28	}29	return &KafkaConsumer{30		ready:    make(chan bool),31	}, nil32}33func main() {

ConsumeClaim

Using AI Code Generation

1func (c *Consumer) ConsumeClaim(sess sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {2    for message := range claim.Messages() {3        fmt.Fprintf(os.Stdout, "Message claimed: value = %s, timestamp = %v, topic = %s4", string(message.Value), message.Timestamp, message.Topic)5        sess.MarkMessage(message, "")6    }7}8func main() {9    config := sarama.NewConfig()10    consumer := Consumer{}11    client, err := sarama.NewClient([]string{"localhost:9092"}, config)12    if err != nil {13        fmt.Println("Error creating client: ", err)14    }15    consumerGroup, err := sarama.NewConsumerGroupFromClient("my-group", client)16    if err != nil {17        fmt.Println("Error creating consumer group client: ", err)18    }19    defer func() {20        if err := consumerGroup.Close(); err != nil {21            fmt.Println("Error closing client: ", err)22        }23    }()24    for {25        ctx, cancel := context.WithCancel(context.Background())26        go func() {27            for err := range consumerGroup.Errors() {28                fmt.Println("Error from consumer: ", err)29            }30        }()31        go func() {32            for {33                if err := consumerGroup.Consume(ctx, []string{"my-topic"}, &consumer); err != nil {34                    fmt.Println("Error from consumer: ", err)35                }36                if ctx.Err() != nil {37                }38                cancel()

ConsumeClaim

Using AI Code Generation

1import (2var (3func main() {4	config := sarama.NewConfig()5	brokers := []string{"localhost:9092"}6	topics := []string{"test"}7	consumer, err := sarama.NewConsumer(brokers, config)8	if err != nil {9		panic(err)10	}11	defer func() {12		if err := consumer.Close(); err != nil {13			panic(err)14		}15	}()16	signals := make(chan os.Signal, 1)17	signal.Notify(signals, os.Interrupt)18	partitionList, err := consumer.Partitions(topics[0])19	if err != nil {20		panic(err)21	}22	for partition := range partitionList {23		pc, err := consumer.ConsumePartition(topics[0], int32(partition), sarama.OffsetNewest)24		if err != nil {25			panic(err)26		}27		defer pc.AsyncClose()28		wg.Add(1)29		go func(sarama.PartitionConsumer) {30			defer wg.Done()31			for msg := range pc.Messages() {32				fmt.Printf("Partition:\t%d33				fmt.Printf("Offset:\t%d34				fmt.Printf("Key:\t%s35", string(msg.Key))36				fmt.Printf("Value:\t%s37", string(msg.Value))38			}39		}(pc)40	}41	wg.Wait()42	fmt.Println("Done consuming topic", topics[0])43}44import (45var (46func main() {47	config := sarama.NewConfig()48	brokers := []string{"localhost:9092"}49	topics := []string{"test"}

ConsumeClaim

Using AI Code Generation

1import (2func main() {3    wg.Add(1)4    go func() {5        defer wg.Done()6        config := sarama.NewConfig()7        brokers := []string{"localhost:9092"}8        consumer, err := sarama.NewConsumer(brokers, config)9        if err != nil {10            panic(err)11        }12        defer func() {13            if err := consumer.Close(); err != nil {14                panic(err)15            }16        }()17        groups, err := consumer.ListGroups()18        if err != nil {19            panic(err)20        }21        fmt.Println("Consumer Groups:", groups)22        partitionConsumer, err := consumer.ConsumePartition("test", 0, sarama.OffsetNewest)23        if err != nil {24            panic(err)25        }26        defer func() {27            if err := partitionConsumer.Close(); err != nil {28                panic(err)29            }30        }()31        signals := make(chan os.Signal, 1)32        signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)33        doneCh := make(chan struct{})34        go func() {35            for {36                select {37                case msg := <-partitionConsumer.Messages():38                    fmt.Printf("Message claimed: value = %s, timestamp = %v, topic = %s\n", string(msg.Value), msg.Timestamp, msg.Topic)39                case err := <-partitionConsumer.Errors():40                    fmt.Printf("Error: %s41", err.Error())42                    fmt.Println("Interrupt is detected")43                    doneCh <- struct{}{}44                }45            }46        }()47        fmt.Println("Done consuming topic test")48    }()49    wg.Wait()50}

ConsumeClaim

Using AI Code Generation

1import (2func main() {3	config := sarama.NewConfig()4	group, err := sarama.NewConsumerGroup([]string{"localhost:9092"}, "my-group", config)5	if err != nil {6		panic(err)7	}8	defer func() {9		if err := group.Close(); err != nil {10			panic(err)11		}12	}()13	go func() {14		for err := range group.Errors() {15			fmt.Println(err)16		}17	}()18	for {19		topics := []string{"my-topic"}20		handler := &consumerGroupHandler{}21		err := group.Consume(context.Background(), topics, handler)22		if err != nil {23			panic(err)24		}25	}26}27import (28func main() {29	config := sarama.NewConfig()30	group, err := sarama.NewConsumerGroup([]string{"localhost:9092"}, "my-group", config)31	if err != nil {32		panic(err)33	}34	defer func() {35		if err := group.Close(); err != nil {36			panic(err)37		}38	}()39	go func() {40		for err := range group.Errors() {41			fmt.Println(err)42		}43	}()44	for {45		topics := []string{"my-topic"}46		handler := &consumerGroupHandler{}47		err := group.Consume(context.Background(), topics, handler)48		if err != nil {49			panic(err)50		}51	}52}53import (54func main() {55	config := sarama.NewConfig()

ConsumeClaim

Using AI Code Generation

1func main() {2    fmt.Println("Consumer")3    p := kafka.NewConsumer(&kafka.ConfigMap{4    })5    p.SubscribeTopics([]string{"myTopic", "^aRegex.*[Tt]opic"}, nil)6    for run == true {7        msg, err := p.ReadMessage(-1)8        if err == nil {9            fmt.Printf("Message on %s: %s\n", msg.TopicPartition, string(msg.Value))10        } else {11            fmt.Printf("Consumer error: %v (%v)\n", err, msg)12        }13    }14    fmt.Printf("Closing consumer\n")15    p.Close()16}17func main() {18    fmt.Println("Consumer")19    p := kafka.NewConsumer(&kafka.ConfigMap{20    })21    p.SubscribeTopics([]string{"myTopic", "^aRegex.*[Tt]opic"}, nil)22    for run == true {23        ev := p.Poll(100)24        if ev == nil {25        }26        switch e := ev.(type) {27            fmt.Printf("Message on %s: %s\n", e.TopicPartition, string(e.Value))28            fmt.Fprintf(os.Stderr, "%% Error: %v: %v29", e.Code(), e)30            fmt.Printf("Ignored %v31        }32    }33    fmt.Printf("Closing consumer\n")34    p.Close()35}36func main() {37    fmt.Println("Consumer")38    p := kafka.NewConsumer(&kafka.ConfigMap{39    })40    p.SubscribeTopics([]string{"myTopic", "^aRegex.*[Tt]opic"}, nil)

ConsumeClaim

Using AI Code Generation

1import (2type Consumer struct {3}4func (c *Consumer) ConsumeClaim(sess sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {5	defer sess.MarkMessage(claim.Messages()[0], "")6	for message := range claim.Messages() {7		fmt.Printf("Message claimed: value = %s, timestamp = %v, topic = %s8", string(message.Value), message.Timestamp, message.Topic)9	}10}11func (c *Consumer) Setup(sess sarama.ConsumerGroupSession) error {12	close(c.ready)13}14func (c *Consumer) Cleanup(sarama.ConsumerGroupSession) error {15}16func main() {17	config := sarama.NewConfig()18	client, err := sarama.NewClient([]string{"localhost:9092"}, config)19	if err != nil {20		panic(err)21	}22	consumer, err := sarama.NewConsumerGroupFromClient("my-group", client)23	if err != nil {24		panic(err)25	}26	signals := make(chan os.Signal, 1)27	signal.Notify(signals, os.Interrupt)28	go func() {29		for err := range consumer.Errors() {30			fmt.Println(err)31		}32	}()33	go func() {34		for ntf := range consumer.Notifications() {35			fmt.Println(ntf)36		}37	}()38	for {39		select {40			handler := Consumer{41				ready: make(chan bool),42			}43			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)44			defer cancel()45			if err := consumer.Consume(ctx

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