118 lines
2.2 KiB
Go
118 lines
2.2 KiB
Go
package main
|
|
|
|
import (
|
|
"log"
|
|
"os"
|
|
"time"
|
|
|
|
amqp "github.com/rabbitmq/amqp091-go"
|
|
)
|
|
|
|
type AMQPConnection struct {
|
|
conn *amqp.Connection
|
|
channel *amqp.Channel
|
|
error_channel chan *amqp.Error
|
|
observers []chan<- bool
|
|
}
|
|
|
|
func (amqpConn *AMQPConnection) Init() {
|
|
amqpConn.error_channel = make(chan *amqp.Error)
|
|
}
|
|
|
|
func (amqpConn *AMQPConnection) Connect() error {
|
|
amqpConn.Close()
|
|
|
|
amqp_url := os.Getenv("AMQP_URL")
|
|
for {
|
|
conn, err := amqp.Dial(amqp_url)
|
|
if err != nil {
|
|
log.Printf("Failed to connect to RabbitMQ: %s", err)
|
|
time.Sleep(5 * time.Second)
|
|
} else {
|
|
amqpConn.conn = conn
|
|
break
|
|
}
|
|
}
|
|
|
|
ch, err := amqpConn.conn.Channel()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
amqpConn.channel = ch
|
|
amqpConn.channel.NotifyClose(amqpConn.error_channel)
|
|
|
|
go func() {
|
|
for err := range amqpConn.error_channel {
|
|
log.Printf("AMQP error: %s", err)
|
|
amqpConn.Connect()
|
|
log.Println("Reconnected to RabbitMQ")
|
|
for _, observer := range amqpConn.observers {
|
|
observer <- true
|
|
log.Println("Notified observer")
|
|
}
|
|
}
|
|
}()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (amqpConn *AMQPConnection) ConnectToQueue(name string, routing_key string) (<-chan amqp.Delivery, error) {
|
|
q, err := amqpConn.channel.QueueDeclare(
|
|
name, // name
|
|
false, // durable
|
|
false, // delete when unused
|
|
true, // exclusive
|
|
false, // no-wait
|
|
nil, // arguments
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
err = amqpConn.channel.QueueBind(
|
|
q.Name, // queue name
|
|
routing_key, // routing key
|
|
"amq.topic", // exchange
|
|
false,
|
|
nil,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
msgs, err := amqpConn.channel.Consume(
|
|
q.Name, // queue
|
|
"", // consumer
|
|
true, // auto ack
|
|
false, // exclusive
|
|
false, // no local
|
|
false, // no wait
|
|
nil, // args
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return msgs, nil
|
|
}
|
|
|
|
func (amqpConn *AMQPConnection) NotifyError() <-chan bool {
|
|
notify := make(chan bool)
|
|
amqpConn.observers = append(amqpConn.observers, notify)
|
|
log.Println("Added observer")
|
|
return notify
|
|
}
|
|
|
|
func (amqpConn *AMQPConnection) Close() {
|
|
if amqpConn.channel != nil {
|
|
amqpConn.channel.Close()
|
|
}
|
|
|
|
if amqpConn.conn != nil {
|
|
amqpConn.conn.Close()
|
|
}
|
|
|
|
amqpConn.channel = nil
|
|
amqpConn.conn = nil
|
|
}
|