我们有一个从n个消息队列接收消息的服务。但是,如果重新启动消息队列服务,则即使消息队列服务已成功重新启动,消息检索服务也会停止接收消息。消息队列服务重新启动后服务没有收到消息
我试图专门捕获消息检索服务中引发的MessageQueueException,并再次调用队列的BeginReceive方法。但是,在2秒左右的时间内,消息队列服务才会重新启动,我得到大约1875个异常实例,然后在我们的StartListening方法中引发另一个MessageQueueException时服务停止运行。
有没有一个优雅的方式来从消息队列服务重新启动恢复?
private void OnReceiveCompleted(object sender, ReceiveCompletedEventArgs e)
{
MessageQueue queue = (MessageQueue)sender;
try
{
Message message = queue.EndReceive(e.AsyncResult);
this.StartListening(queue);
if (this.MessageReceived != null)
this.MessageReceived(this, new MessageReceivedEventArgs(message));
}
catch (MessageQueueException)
{
LogUtility.LogError(String.Format(CultureInfo.InvariantCulture, StringResource.LogMessage_QueueManager_MessageQueueException, queue.MachineName, queue.QueueName, queue.Path));
this.StartListening(queue);
}
}
public void StartListening(MessageQueue queue)
{
queue.BeginReceive();
}
我需要处理这个问题导致的无限循环问题,并清理它一下,但你明白了。
发生MessageQueueException时,调用RecoverQueue方法。
private void RecoverQueue(MessageQueue queue)
{
string queuePath = queue.Path;
bool queueRecovered = false;
while (!queueRecovered)
{
try
{
this.StopListening(queue);
queue.Close();
queue.Dispose();
Thread.Sleep(2000);
MessageQueue newQueue = this.CreateQueue(queuePath);
newQueue.ReceiveCompleted += new ReceiveCompletedEventHandler(this.OnReceiveCompleted);
this.StartListening(newQueue);
LogUtility.LogInformation(String.Format(CultureInfo.InvariantCulture, "Message queue {0} recovered successfully.", newQueue.QueueName));
queueRecovered = true;
}
catch (Exception ex)
{
LogUtility.LogError(String.Format(CultureInfo.InvariantCulture, "The following error occurred while trying to recover queue: {0} error: {1}", queue.QueueName, ex.Message));
}
}
}
public void StopListening(MessageQueue queue)
{
queue.ReceiveCompleted -= new ReceiveCompletedEventHandler(this.OnReceiveCompleted);
}
发布的RecoverQueue方法的代码 – chad 2012-04-26 18:30:00