Introduction.md

How to use

go mod

require (
    github.com/dreaminglwj/rocketmq-client-go v2.0.0-alpha1
)

Set Logger

Go Client define the Logger interface for log output, user can specify implementation of private. in default, client use logrus.

rlog.SetLogger(Logger)

Send message

Interface

Producer interface {
	Start() error
	Shutdown() error
	SendSync(context.Context, *primitive.Message) (*internal.SendResult, error)
	SendOneWay(context.Context, *primitive.Message) error
}

Examples

• create a new Producer instance

opt := producer.ProducerOptions{
    NameServerAddr:           "127.0.0.1:9876",
    RetryTimesWhenSendFailed: 2,
}
p := producer.NewProducer(opt)

• start the producer

err := p.Start()

• send message with sync

result, err := p.SendSync(context.Background(), &primitive.Message{
    Topic: "test",
    Body:  []byte("Hello RocketMQ Go Client!"),
})

// do something with result

• or send message with oneway

err := p.SendOneWay(context.Background(), &primitive.Message{
    Topic: "test",
    Body:  []byte("Hello RocketMQ Go Client!"),
})

Full examples: producer

Consume Message

alpha1 only support PushConsumer

Interface

PushConsumer interface {
	Start() error
	Shutdown()
	Subscribe(topic string, selector MessageSelector,
		f func(*ConsumeMessageContext, []*primitive.MessageExt) (ConsumeResult, error)) error
}

Usage

• Create a PushConsumer instance

c := consumer.NewPushConsumer("testGroup", consumer.ConsumerOption{
    NameServerAddr: "127.0.0.1:9876",
    ConsumerModel:  consumer.Clustering,
    FromWhere:      consumer.ConsumeFromFirstOffset,
})

• Subscribe a topic(only support one topic now), and define your consuming function

err := c.Subscribe("test", consumer.MessageSelector{}, func(ctx *consumer.ConsumeMessageContext,
    msgs []*primitive.MessageExt) (consumer.ConsumeResult, error) {
    fmt.Println(msgs)
    return consumer.ConsumeSuccess, nil
})

• start the consumer(NOTE: MUST after subscribe)

Full examples: consumer