話題模式
話題模式主要使用routingKey來進行路由匹配，匹配規則如下，
要注意key規則 其中"*"用於匹配一個單詞， "#"用於匹配多個單詞(可以是零) 匹配imooc.* 表示可以匹配 imooc.hello ,但是imooc.hello.one需要使用imooc.#纔可以匹配到
話題模式創建RabbitMq實例
func NewRabbitMqTopic(exchangeName, routingKey string)*RabbitMq{
return NewRabbitMq("", exchangeName, routingKey)
}
生產者
1、嘗試創建交換機，topic模式，
2、發送消息傳入交換機和key
func (r *RabbitMq)PublishTopic(message string){
//1. 嘗試創建交換機
err := r.channel.ExchangeDeclare(
r.Exchange,
"topic",
//是否持久化
false,
//
false,
false,
false,
nil)
r.failOnErr(err, "failed to declare an exchange")
//2. 發送消息
r.channel.Publish(
//交換機
r.Exchange, //簡單模式爲空
//key
r.Key,
false,
false,
//發送的信息
amqp.Publishing{
ContentType: "text/plain",
Body: []byte(message),
})
}
消費者
1、嘗試創建交換機, 模式爲topic，傳入exchange
2、申請隊列，隊列名稱爲空
3、綁定隊列傳入隊列名稱，key，交換機
4、channel.Consume消費消息
func(r *RabbitMq)RecivedTopic(){
//嘗試創建交換機
err := r.channel.ExchangeDeclare(
r.Exchange,
"topic",
//是否持久化
false,
//
false,
false,
false,
nil)
r.failOnErr(err, "failed to declare an exchange")
//2 嘗試創建隊列
q, err := r.channel.QueueDeclare(
"",
false,
false,
true,
false,
nil)
r.failOnErr(err, "failed to declare an queue")
//3 綁定隊列到exchange中
err = r.channel.QueueBind(
q.Name,
r.Key,
r.Exchange,
false,
nil)
//消費消息
msgs, err := r.channel.Consume(
q.Name,
"",
true,
false,
false,
false,
nil)
if err != nil {
fmt.Printf("channel.Consume failed, error:%+v\n", err)
return
}
forever := make(chan bool)
go func() {
for d := range msgs {
//實現我們要處理的邏輯函數
log.Printf("Received a message:%s", d.Body)
}
}()
log.Printf("[*] Waiting for message, exit to press CTRL + C")
<-forever
}
使用案例
生產者
package main
import (
"rabbitmq/RabbitMq"
"strconv"
"time"
)
func main() {
imoocOne := RabbitMq.NewRabbitMqTopic("exImoocTopic", "imooc.topic.one")
imoocTwo := RabbitMq.NewRabbitMqRouting("exImoocTopic", "imooc.topic.two")
for i := 0; i < 10; i++ {
imoocOne.PublishTopic("imooc topic one " + strconv.Itoa(i))
imoocTwo.PublishTopic("imooc topic two " + strconv.Itoa(i))
time.Sleep(10 * time.Millisecond)
}
}
消費者
package main
import "rabbitmq/RabbitMq"
func main(){
rabbitmq := RabbitMq.NewRabbitMqRouting("exImoocTopic", "#")
rabbitmq.RecivedTopic()
}
=========================================================
package main
import (
"rabbitmq/RabbitMq"
)
func main(){
rabbitmq := RabbitMq.NewRabbitMqRouting("exImoocTopic", "imooc.*.two")
rabbitmq.RecivedTopic()
}
分析
1、生產者者創建兩個rabbitmq實例交換機名稱爲exImoocTopic，routingKey爲imooc.topic.one 和 imooc.topic.two
2、消費者1的routingKey爲#， 消費者2的routingKey爲imooc.*.two，
3、消費者1可以獲取到所有的路由的消息，消費者2可以獲取到格式爲imooc.topic.two的消息，實際消費可以消費imooc.[任意].two的消息，只是在本案例中只能消費imooc.topic.two的消息
輸出結果
消費者1輸出結果
2019/07/04 12:05:57 [*] Waiting for message, exit to press CTRL + C
2019/07/04 12:06:04 Received a message:imooc topic one 0
2019/07/04 12:06:04 Received a message:imooc topic two 0
2019/07/04 12:06:04 Received a message:imooc topic one 1
2019/07/04 12:06:04 Received a message:imooc topic two 1
2019/07/04 12:06:04 Received a message:imooc topic one 2
2019/07/04 12:06:04 Received a message:imooc topic two 2
2019/07/04 12:06:04 Received a message:imooc topic one 3
2019/07/04 12:06:04 Received a message:imooc topic two 3
2019/07/04 12:06:04 Received a message:imooc topic one 4
2019/07/04 12:06:04 Received a message:imooc topic two 4
2019/07/04 12:06:04 Received a message:imooc topic one 5
2019/07/04 12:06:04 Received a message:imooc topic two 5
2019/07/04 12:06:04 Received a message:imooc topic one 6
2019/07/04 12:06:04 Received a message:imooc topic two 6
2019/07/04 12:06:04 Received a message:imooc topic one 7
2019/07/04 12:06:04 Received a message:imooc topic two 7
2019/07/04 12:06:04 Received a message:imooc topic one 8
2019/07/04 12:06:04 Received a message:imooc topic two 8
2019/07/04 12:06:04 Received a message:imooc topic one 9
2019/07/04 12:06:04 Received a message:imooc topic two 9消費者2輸出結果
2019/07/04 12:06:01 [*] Waiting for message, exit to press CTRL + C
2019/07/04 12:06:04 Received a message:imooc topic two 0
2019/07/04 12:06:04 Received a message:imooc topic two 1
2019/07/04 12:06:04 Received a message:imooc topic two 2
2019/07/04 12:06:04 Received a message:imooc topic two 3
2019/07/04 12:06:04 Received a message:imooc topic two 4
2019/07/04 12:06:04 Received a message:imooc topic two 5
2019/07/04 12:06:04 Received a message:imooc topic two 6
2019/07/04 12:06:04 Received a message:imooc topic two 7
2019/07/04 12:06:04 Received a message:imooc topic two 8
2019/07/04 12:06:04 Received a message:imooc topic two 9