private void UpdateConfigServices()
{
lock (this)
{
string url = AssembleMetaServiceUrl();
Com.Ctrip.Framework.Apollo.Util.Http.HttpRequest request = new Com.Ctrip.Framework.Apollo.Util.Http.HttpRequest(url);
int maxRetries = 5;
Exception exception = null;
for (int i = 0; i < maxRetries; i++)
{
try
{
HttpResponse <IList <ServiceDTO> > response = m_httpUtil.DoGet <IList <ServiceDTO> >(request);
IList <ServiceDTO> services = response.Body;
if (services == null || services.Count == 0)
{
continue;
}
m_configServices.WriteFullFence(services);
return;
}
catch (Exception ex)
{
logger.Warn(ex);
exception = ex;
}
Thread.Sleep(1000); //sleep 1 second
}
throw new ApolloConfigException(string.Format("Get config services failed from {0}", url), exception);
}
}
private ApolloConfig LoadApolloConfig()
{
string appId = m_configUtil.AppId;
string cluster = m_configUtil.Cluster;
string dataCenter = m_configUtil.DataCenter;
int maxRetries = 2;
Exception exception = null;
IList <ServiceDTO> configServices = ConfigServices;
string url = null;
for (int i = 0; i < maxRetries; i++)
{
IList <ServiceDTO> randomConfigServices = new List <ServiceDTO>(configServices);
randomConfigServices.Shuffle();
//Access the server which notifies the client first
if (m_longPollServiceDto.ReadFullFence() != null)
{
randomConfigServices.Insert(0, m_longPollServiceDto.AtomicExchange(null));
}
foreach (ServiceDTO configService in randomConfigServices)
{
url = AssembleQueryConfigUrl(configService.HomepageUrl, appId, cluster, m_namespace, dataCenter, m_remoteMessages.ReadFullFence(), m_configCache.ReadFullFence());
logger.Debug(string.Format("Loading config from {0}", url));
Com.Ctrip.Framework.Apollo.Util.Http.HttpRequest request = new Com.Ctrip.Framework.Apollo.Util.Http.HttpRequest(url);
try
{
HttpResponse <ApolloConfig> response = m_httpUtil.DoGet <ApolloConfig>(request);
if (response.StatusCode == 304)
{
logger.Debug("Config server responds with 304 HTTP status code.");
return(m_configCache.ReadFullFence());
}
ApolloConfig result = response.Body;
logger.Debug(
string.Format("Loaded config for {0}: {1}", m_namespace, result));
return(result);
}
catch (ApolloConfigStatusCodeException ex)
{
ApolloConfigStatusCodeException statusCodeException = ex;
//config not found
if (ex.StatusCode == 404)
{
string message = string.Format("Could not find config for namespace - appId: {0}, cluster: {1}, namespace: {2}, please check whether the configs are released in Apollo!", appId, cluster, m_namespace);
statusCodeException = new ApolloConfigStatusCodeException(ex.StatusCode, message);
}
logger.Warn(statusCodeException);
exception = statusCodeException;
}
catch (Exception ex)
{
logger.Warn(ex);
exception = ex;
}
}
Thread.Sleep(1000); //sleep 1 second
}
string fallbackMessage = string.Format("Load Apollo Config failed - appId: {0}, cluster: {1}, namespace: {2}, url: {3}", appId, cluster, m_namespace, url);
throw new ApolloConfigException(fallbackMessage, exception);
}
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);
}
}
}
