private void DoLongPollingRefresh(string appId, string cluster, string dataCenter)
{
Random random = new Random();
ServiceDTO lastServiceDto = null;
while (!m_longPollingStopped.ReadFullFence())
{
int sleepTime = 50; //default 50 ms
try
{
if (lastServiceDto == null)
{
IList <ServiceDTO> configServices = ConfigServices;
lastServiceDto = configServices[random.Next(configServices.Count)];
}
string url = AssembleLongPollRefreshUrl(lastServiceDto.HomepageUrl, appId, cluster, dataCenter);
logger.Debug(
string.Format("Long polling from {0}", url));
Com.Ctrip.Framework.Apollo.Util.Http.HttpRequest request = new Com.Ctrip.Framework.Apollo.Util.Http.HttpRequest(url);
//longer timeout - 10 minutes
request.Timeout = 600000;
HttpResponse <IList <ApolloConfigNotification> > response = m_httpUtil.DoGet <IList <ApolloConfigNotification> >(request);
logger.Debug(
string.Format("Long polling response: {0}, url: {1}", response.StatusCode, url));
if (response.StatusCode == 200 && response.Body != null)
{
UpdateNotifications(response.Body);
Notify(lastServiceDto, response.Body);
m_longPollSuccessSchedulePolicyInMS.Success();
}
else
{
sleepTime = m_longPollSuccessSchedulePolicyInMS.Fail();
}
//try to load balance
if (response.StatusCode == 304 && random.NextDouble() >= 0.5)
{
lastServiceDto = null;
}
m_longPollFailSchedulePolicyInSecond.Success();
}
catch (Exception ex)
{
lastServiceDto = null;
int sleepTimeInSecond = m_longPollFailSchedulePolicyInSecond.Fail();
logger.Warn(
string.Format("Long polling failed, will retry in {0} seconds. appId: {1}, cluster: {2}, namespace: {3}, reason: {4}",
sleepTimeInSecond, appId, cluster, AssembleNamespaces(), ExceptionUtil.GetDetailMessage(ex)));
sleepTime = sleepTimeInSecond * 1000;
}
finally
{
Thread.Sleep(sleepTime);
}
}
}
