我們有一個從n個消息隊列接收消息的服務。但是,如果重新啓動消息隊列服務,則即使消息隊列服務已成功重新啓動,消息檢索服務也會停止接收消息。消息隊列服務重新啓動後服務沒有收到消息
我試圖專門捕獲消息檢索服務中引發的MessageQueueException,並再次調用隊列的BeginReceive方法。但是,在2秒左右的時間內,消息隊列服務纔會重新啓動,我得到大約1875個異常實例,然後在我們的StartListening方法中引發另一個MessageQueueException時服務停止運行。
有沒有一個優雅的方式來從消息隊列服務重新啓動恢復?
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();
}
我需要處理這個問題導致的無限循環問題,並清理它一下,但你明白了。
發生MessageQueueException時,調用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);
}
發佈的RecoverQueue方法的代碼 – chad 2012-04-26 18:30:00