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 async Task <ApolloConfig> LoadApolloConfig()
{
var appId = _options.AppId;
var cluster = _options.Cluster;
var dataCenter = _options.DataCenter;
var configServices = await _serviceLocator.GetConfigServices();
Exception exception = null;
string url = null;
var notFound = false;
for (var i = 0; i < 2; i++)
{
IList <ServiceDto> randomConfigServices = new List <ServiceDto>(configServices);
randomConfigServices.Shuffle();
//Access the server which notifies the client first
if (_longPollServiceDto.ReadFullFence() != null)
{
randomConfigServices.Insert(0, _longPollServiceDto.AtomicExchange(null));
}
foreach (var configService in randomConfigServices)
{
url = AssembleQueryConfigUrl(configService.HomepageUrl, appId, cluster, Namespace, dataCenter, _remoteMessages.ReadFullFence(), _configCache.ReadFullFence());
Logger.Debug($"Loading config from {url}");
try
{
var response = await _httpUtil.DoGetAsync <ApolloConfig>(url);
if (response.StatusCode == HttpStatusCode.NotModified)
{
Logger.Debug("Config server responds with 304 HTTP status code.");
return(_configCache.ReadFullFence());
}
var result = response.Body;
Logger.Debug(
$"Loaded config for {Namespace}: {result?.Configurations?.Count ?? 0}");
return(result);
}
catch (ApolloConfigStatusCodeException ex)
{
var statusCodeException = ex;
//config not found
if (ex.StatusCode == HttpStatusCode.NotFound)
{
notFound = true;
var message = $"Could not find config for namespace - appId: {appId}, cluster: {cluster}, namespace: {Namespace}, please check whether the configs are released in Apollo!";
statusCodeException = new ApolloConfigStatusCodeException(ex.StatusCode, message);
}
Logger.Warn(statusCodeException);
exception = statusCodeException;
}
catch (Exception ex)
{
Logger.Warn(ex);
exception = ex;
}
}
await Task.Delay(1000); //sleep 1 second
}
if (notFound)
{
return(null);
}
var fallbackMessage = $"Load Apollo Config failed - appId: {appId}, cluster: {cluster}, namespace: {Namespace}, url: {url}";
throw new ApolloConfigException(fallbackMessage, exception);
}
