private async Task DoLongPollingRefresh(string appId, string cluster, string dataCenter, CancellationToken cancellationToken)
{
var random = new Random();
ServiceDto lastServiceDto = null;
while (!cancellationToken.IsCancellationRequested)
{
var sleepTime = 50; //default 50 ms
string url = null;
try
{
if (lastServiceDto == null)
{
var configServices = await _serviceLocator.GetConfigServices().ConfigureAwait(false);
lastServiceDto = configServices[random.Next(configServices.Count)];
}
url = AssembleLongPollRefreshUrl(lastServiceDto.HomepageUrl, appId, cluster, dataCenter);
Logger().Debug($"Long polling from {url}");
var response = await _httpUtil.DoGetAsync <IList <ApolloConfigNotification> >(url, 600000).ConfigureAwait(false);
Logger().Debug($"Long polling response: {response.StatusCode}, url: {url}");
if (response.StatusCode == HttpStatusCode.OK && response.Body != null)
{
UpdateNotifications(response.Body);
UpdateRemoteNotifications(response.Body);
Notify(lastServiceDto, response.Body);
_longPollSuccessSchedulePolicyInMs.Success();
}
else
{
sleepTime = _longPollSuccessSchedulePolicyInMs.Fail();
}
//try to load balance
if (response.StatusCode == HttpStatusCode.NotModified && random.NextDouble() >= 0.5)
{
lastServiceDto = null;
}
_longPollFailSchedulePolicyInSecond.Success();
}
catch (Exception ex)
{
lastServiceDto = null;
var sleepTimeInSecond = _longPollFailSchedulePolicyInSecond.Fail();
Logger().Warn($"Long polling failed, will retry in {sleepTimeInSecond} seconds. appId: {appId}, cluster: {cluster}, namespace: {string.Join(ConfigConsts.ClusterNamespaceSeparator, _longPollNamespaces.Keys)}, long polling url: {url}, reason: {ex.GetDetailMessage()}");
sleepTime = sleepTimeInSecond * 1000;
}
finally
{
await Task.Delay(sleepTime, cancellationToken).ConfigureAwait(false);
}
}
}
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
string url = null;
try
{
if (lastServiceDto == null)
{
IList <ServiceDTO> configServices = ConfigServices;
lastServiceDto = configServices[random.Next(configServices.Count)];
}
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);
UpdateRemoteNotifications(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}, long polling url: {4}, reason: {5}",
sleepTimeInSecond, appId, cluster, AssembleNamespaces(), url, ExceptionUtil.GetDetailMessage(ex)));
sleepTime = sleepTimeInSecond * 1000;
}
finally
{
Thread.Sleep(sleepTime);
}
}
}
