fix: add polling reconnect

pkg/queue/queue_rabbitmq.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"sync"
 	"time"
 
 	amqp "github.com/rabbitmq/amqp091-go"
@@ -15,6 +16,9 @@ type RabbitMQQueue struct {
 	results chan AnalyzeResult
 	conn    *amqp.Connection
 	channel *amqp.Channel
+
+	mu         sync.Mutex
+	connString string
 }
 
 // NewRabbitMQQueue initializes a RabbitMQ queue.
@@ -93,6 +97,8 @@ func NewRabbitMQQueue(
 		channel:    ch,
 		jobs:       make(chan AnalyzeJob),
 		results:    make(chan AnalyzeResult),
+		mu:         sync.Mutex{},
+		connString: rabbitMQURL,
 	}
 
 	if isAgent {
@@ -125,6 +131,49 @@ func (q *RabbitMQQueue) Close() {
 	q.conn.Close()
 }
 
+func (q *RabbitMQQueue) reconnectIfNeeded() error {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	if q.conn != nil && !q.conn.IsClosed() && q.channel != nil {
+		return nil // still valid
+	}
+
+	// Recreate everything
+	conn, err := amqp.Dial(q.connString)
+	if err != nil {
+		return fmt.Errorf("failed to reconnect: %w", err)
+	}
+
+	ch, err := conn.Channel()
+	if err != nil {
+		conn.Close()
+		return fmt.Errorf("failed to open channel: %w", err)
+	}
+
+	// Optional: redeclare queues here
+	// _, _ = ch.QueueDeclare(...)
+
+	q.conn = conn
+	q.channel = ch
+	return nil
+}
+
+func (q *RabbitMQQueue) invalidateConnection() {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+
+	if q.channel != nil {
+		_ = q.channel.Close()
+	}
+	if q.conn != nil {
+		_ = q.conn.Close()
+	}
+
+	q.channel = nil
+	q.conn = nil
+}
+
 func (q *RabbitMQQueue) ConsumeJobs(queueName string) {
 	const pollInterval = 5 * time.Second
 
@@ -135,9 +184,17 @@ func (q *RabbitMQQueue) ConsumeJobs(queueName string) {
 	// | Connection lost   | msg = zero, ok = false, err = non-nil |
 
 	for {
+
+		if err := q.reconnectIfNeeded(); err != nil {
+			slog.Error("failed to reconnect", slog.Any("error", err))
+			time.Sleep(10 * time.Second)
+			continue
+		}
+
 		msg, ok, err := q.channel.Get(queueName, false) // false = manual ack
 		if err != nil {
 			slog.Error("polling error while getting job", slog.Any("error", err))
+			q.invalidateConnection()
 			time.Sleep(pollInterval)
 			continue
 		}