新学 go,求帮忙，连接 rabbitmq,心跳检测重试问题 作用： mq 客户端监听队列，获取队列消息
mine21 · 2020-05-11 16:42:07 +08:00 · 2433 次点击这是一个创建于 1692 天前的主题，其中的信息可能已经有所发展或是发生改变。
现在按照晚上教程写了个代码，功能是可以啦，但是 mq 正常情况，连接成功。但是 mq 挂了，再启动 mq, 我写的这个客户端就监听不到了，连接已经挂掉了，怎么心跳检测重新发起连接那，
求指点下，新学 go,有点懵
目前的客户端照着网上的教程写的
package main
import (
"log"
"github.com/streadway/amqp"
)
func failOnError(err error, msg string) {
if err != nil {
log.Fatalf("%s: %s", msg, err)
}
}
// 只能在安装 rabbitmq 的服务器上操作
func main() {
conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
failOnError(err, "Failed to connect to RabbitMQ")
defer conn.Close()
ch, err := conn.Channel()
failOnError(err, "Failed to open a channel")
defer ch.Close()
q, err := ch.QueueDeclare(
"hello", // name
false, // durable
false, // delete when unused
false, // exclusive
false, // no-wait
nil, // arguments
)
failOnError(err, "Failed to declare a queue")
msgs, err := ch.Consume(
q.Name, // queue
"", // consumer
true, // auto-ack
false, // exclusive
false, // no-local
false, // no-wait
nil, // args
)
failOnError(err, "Failed to register a consumer")
forever := make(chan bool)
go func() {
for d := range msgs {
log.Printf("Received a message: %s", d.Body)
}
}()
log.Printf(" [*] Waiting for messages. To exit press CTRL+C")
<-forever
}
求指点下，新学 go,有点懵
目前的客户端照着网上的教程写的
package main
import (
"log"
"github.com/streadway/amqp"
)
func failOnError(err error, msg string) {
if err != nil {
log.Fatalf("%s: %s", msg, err)
}
}
// 只能在安装 rabbitmq 的服务器上操作
func main() {
conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
failOnError(err, "Failed to connect to RabbitMQ")
defer conn.Close()
ch, err := conn.Channel()
failOnError(err, "Failed to open a channel")
defer ch.Close()
q, err := ch.QueueDeclare(
"hello", // name
false, // durable
false, // delete when unused
false, // exclusive
false, // no-wait
nil, // arguments
)
failOnError(err, "Failed to declare a queue")
msgs, err := ch.Consume(
q.Name, // queue
"", // consumer
true, // auto-ack
false, // exclusive
false, // no-local
false, // no-wait
nil, // args
)
failOnError(err, "Failed to register a consumer")
forever := make(chan bool)
go func() {
for d := range msgs {
log.Printf("Received a message: %s", d.Body)
}
}()
log.Printf(" [*] Waiting for messages. To exit press CTRL+C")
<-forever
}
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1
Gakho 2020-05-11 18:55:38 +08:00
断开了连接这种 err 在你的 go func 应该能取到的，不用其他库的话就自己做重试
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2
zpfhbyx 2020-05-11 19:00:35 +08:00
你 rabbitmq 有开 heartbeat 么
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3
mine21 OP 最后用这个单写了个 重试
amqp: func (*Connection) NotifyClose func (c *Connection) NotifyClose(receiver chan *Error) chan *Error NotifyClose registers a listener for close events either initiated by an error accompanying a connection.close method or by a normal shutdown. On normal shutdowns, the chan will be closed. To reconnect after a transport or protocol error, register a listener here and re-run your setup process. |
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