Merged PR 710571: refactor connection, session and sender handling during reconnect

* logging all errors related to the session and connection close
* closing the sender properly not only in case of an error

Security-concept-update-needed: false.

JIRA Work Item: STACKITALO-61

audit/messaging/messaging.go

@@ -2,13 +2,14 @@ package messaging
 
 import (
 	"context"
-	"dev.azure.com/schwarzit/schwarzit.stackit-public/audit-go.git/log"
 	"errors"
 	"fmt"
-	"github.com/Azure/go-amqp"
 	"strings"
 	"sync"
 	"time"
+
+	"dev.azure.com/schwarzit/schwarzit.stackit-public/audit-go.git/log"
+	"github.com/Azure/go-amqp"
 )
 
 // Default connection timeout for the AMQP connection
@@ -200,6 +201,11 @@ func (a *AmqpApi) trySend(ctx context.Context, topic string, data []byte, conten
 	if err != nil {
 		return err
 	}
+	defer func() {
+		if err := sender.Close(ctx); err != nil {
+			log.AuditLogger.Error("failed to close session sender", err)
+		}
+	}()
 
 	bytes := [][]byte{data}
 	message := amqp.Message{
@@ -216,7 +222,6 @@ func (a *AmqpApi) trySend(ctx context.Context, topic string, data []byte, conten
 
 	err = sender.Send(ctx, &message, nil)
 	if err != nil {
-		_ = sender.Close(ctx)
 		return err
 	}
 
@@ -225,9 +230,7 @@ func (a *AmqpApi) trySend(ctx context.Context, topic string, data []byte, conten
 
 // resetConnection closes the current session and connection and reconnects to the messaging system.
 func (a *AmqpApi) resetConnection(ctx context.Context) error {
-	_ = a.session.Close(ctx)
+	if err := a.Close(ctx); err != nil {
-	err := a.connection.Close()
-	if err != nil {
 		log.AuditLogger.Error("failed to close audit messaging connection", err)
 	}
 
@@ -237,7 +240,5 @@ func (a *AmqpApi) resetConnection(ctx context.Context) error {
 // Close implements Api.Close
 func (a *AmqpApi) Close(ctx context.Context) error {
 	log.AuditLogger.Info("close audit messaging connection")
-	_ = a.session.Close(ctx)
+	return errors.Join(a.session.Close(ctx), a.connection.Close())
-	err := a.connection.Close()
-	return err
 }