func producer_test() {fmt.Printf("producer_test\n")config := sarama.NewConfig()config.Producer.RequiredAcks = sarama.WaitForAllconfig.Producer.Partitioner = sarama.NewRandomPartitionerconfig.Producer.Return.Successes = trueconfig.Producer.Return.Errors = trueconfig.Version = sarama.V0_11_0_2producer, err := sarama.NewAsyncProducer([]string{"localhost:9092"}, config)if err != nil {fmt.Printf("producer_test create producer error :%s\n", err.Error())return}defer producer.AsyncClose()// send messagemsg := &sarama.ProducerMessage{Topic: "kafka_go_test",Key:   sarama.StringEncoder("go_test"),}value := "this is message"for {fmt.Scanln(&value)msg.Value = sarama.ByteEncoder(value)fmt.Printf("input [%s]\n", value)// send to chainproducer.Input() <- msgselect {case suc := <-producer.Successes():fmt.Printf("offset: %d,  timestamp: %s", suc.Offset, suc.Timestamp.String())case fail := <-producer.Errors():fmt.Printf("err: %s\n", fail.Err.Error())}}
}

func consumer_test() {fmt.Printf("consumer_test")config := sarama.NewConfig()config.Consumer.Return.Errors = trueconfig.Version = sarama.V0_11_0_2// consumerconsumer, err := sarama.NewConsumer([]string{"localhost:9092"}, config)if err != nil {fmt.Printf("consumer_test create consumer error %s\n", err.Error())return}defer consumer.Close()partition_consumer, err := consumer.ConsumePartition("kafka_go_test", 0, sarama.OffsetOldest)if err != nil {fmt.Printf("try create partition_consumer error %s\n", err.Error())return}defer partition_consumer.Close()for {select {case msg := <-partition_consumer.Messages():fmt.Printf("msg offset: %d, partition: %d, timestamp: %s, value: %s\n",msg.Offset, msg.Partition, msg.Timestamp.String(), string(msg.Value))case err := <-partition_consumer.Errors():fmt.Printf("err :%s\n", err.Error())}}}

func metadata_test() {fmt.Printf("metadata test\n")config := sarama.NewConfig()config.Version = sarama.V0_11_0_2client, err := sarama.NewClient([]string{"localhost:9092"}, config)if err != nil {fmt.Printf("metadata_test try create client err :%s\n", err.Error())return}defer client.Close()// get topic settopics, err := client.Topics()if err != nil {fmt.Printf("try get topics err %s\n", err.Error())return}fmt.Printf("topics(%d):\n", len(topics))for _, topic := range topics {fmt.Println(topic)}// get broker setbrokers := client.Brokers()fmt.Printf("broker set(%d):\n", len(brokers))for _, broker := range brokers {fmt.Printf("%s\n", broker.Addr())}
}