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我有一个WCF服务正在处理一个调用,将处理后的数据发送到另一个服务,并通过发起回调来提醒调用者和该应用程序的任何其他实例。最初,回调被称为最后,但我发现,如果第二个服务没有运行,那么我们试图发现它时会有二十秒的延迟。只有这样的回调才叫。我在呼叫第二个服务之前移动了回叫通知,但它仍然有延迟。我甚至试图在后台进程中触发回调,但这也不起作用。除了改变发现的超时之外,是否有办法避开这种延迟?这是一段代码片段。WCF发现减缓处理回调
// Alert the admins of the change.
if (alertPuis)
{
ReportBoxUpdated(data.SerialNumber);
}
// Now send the change to the box if he's online.
var scope = new Uri(string.Format(@"net.tcp://{0}", data.SerialNumber));
var boxAddress = DiscoveryHelper.DiscoverAddress<IAtcBoxService>(scope);
if (boxAddress != null)
{
var proxy = GetBoxServiceProxy(boxAddress);
if (proxy != null)
{
proxy.UpdateBox(boxData);
}
else
{
Log.Write("AtcSystemService failed on call to update toool Box: {0}",
data.SerialNumber);
}
}
else if (mDal.IsBoxDataInPendingUpdates(data.SerialNumber) == false)
mDal.AddPendingUpdate(data.SerialNumber, null, true, null);
}
和
private static void ReportBoxUpdated(string serialNumber)
{
var badCallbacks = new List<string>();
Action<IAtcSystemServiceCallback> invoke = callback =>
callback.OnBoxUpdated(serialNumber);
foreach (var theCallback in AdminCallbacks)
{
var callback = theCallback.Value as IAtcSystemServiceCallback;
try
{
invoke(callback);
}
catch (Exception ex)
{
Log.Write("Failed to execute callback for admin instance {0}: {1}",
theCallback.Key, ex.Message);
badCallbacks.Add(theCallback.Key);
}
}
foreach (var bad in badCallbacks) // Clean out any stale callbacks from the list.
{
AdminCallbacks.Remove(bad);
}
}