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