public override string GetProperty(string key, string defaultValue)
{
// step 1: check system properties, i.e. -Dkey=value
//TODO looks like .Net doesn't have such system property?
string value = null;
// step 2: check local cached properties file
if (m_configProperties.ReadFullFence() != null)
{
value = m_configProperties.ReadFullFence().GetProperty(key);
}
/// <summary>
/// step 3: check env variable, i.e. PATH=...
/// normally system environment variables are in UPPERCASE, however there might be exceptions.
/// so the caller should provide the key in the right case
/// </summary>
if (value == null)
{
value = System.Environment.GetEnvironmentVariable(key);
}
//TODO step 4: check properties file from classpath
if (value == null && m_configProperties.ReadFullFence() == null)
{
logger.Warn(string.Format("Could not load config for namespace {0} from Apollo, please check whether the configs are released in Apollo! Return default value now!", m_namespace));
}
return(value == null ? defaultValue : value);
}
public override Properties GetConfig()
{
if (m_configCache.ReadFullFence() == null)
{
this.Sync();
}
return(TransformApolloConfigToProperties(m_configCache.ReadFullFence()));
}
/// <summary>
/// Get the config service info from remote meta server.
/// </summary>
/// <returns> the services dto </returns>
public IList <ServiceDTO> GetConfigServices()
{
if (m_configServices.ReadFullFence().Count == 0)
{
UpdateConfigServices();
}
return(m_configServices.ReadFullFence());
}
public override Properties GetConfig()
{
if (_configCache.ReadFullFence() == null)
{
AsyncHelper.RunSync(SchedulePeriodicRefresh);
}
return(TransformApolloConfigToProperties(_configCache.ReadFullFence()));
}
public override Properties GetConfig()
{
if (_syncException != null)
{
throw _syncException;
}
return(TransformApolloConfigToProperties(_configCache.ReadFullFence()));
}
public async Task Get()
{
try
{
var islocalcache = false;
var apiurl = _httpUrlRepository.GetApiUrl();
var client = _httpClientFactory.CreateClient();
var response = await client.SendAsync(new HttpRequestMessage(HttpMethod.Get, apiurl));
response.EnsureSuccessStatusCode();
var content = await response.Content.ReadAsStringAsync();
var output = _jsonHelper.DeserializeObject <ApiInfo>(content);
if (output != null && output.Value != null && output.Value.Count > 0)
{
_dataList.WriteFullFence(output.Value);
islocalcache = true;
}
if (islocalcache)
{
_localDataRepository.Set(_dataList.ReadFullFence());
}
}
catch (Exception ex)
{
_logger.LogError(ex, $"加载配置错误");
_dataList.WriteFullFence(_localDataRepository.Get());
}
}
/// <summary>
/// Get the config service info from remote meta server.
/// </summary>
/// <returns> the services dto </returns>
public async Task <IList <ServiceDto> > GetConfigServices()
{
var services = _configServices.ReadFullFence();
if (services.Count == 0)
{
await UpdateConfigServices();
}
services = _configServices.ReadFullFence();
if (services.Count == 0)
{
throw new ApolloConfigException("No available config service");
}
return(services);
}
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);
}