/// <summary>
/// Initializes a new instance of the <see cref="ConfigServerConfigurationProvider"/> class from a <see cref="ConfigServerConfigurationSource"/>
/// </summary>
/// <param name="source">the <see cref="ConfigServerConfigurationSource"/> the provider uses when accessing the server.</param>
public ConfigServerConfigurationProvider(ConfigServerConfigurationSource source)
: this(source.DefaultSettings, source.LogFactory)
{
_ = source.Configuration as IConfigurationRoot;
_configuration = WrapWithPlaceholderResolver(source.Configuration);
ConfigurationSettingsHelper.Initialize(PREFIX, _settings, _configuration);
}
/// <summary>
/// Initializes a new instance of the <see cref="ConfigServerConfigurationProvider"/> class from a <see cref="ConfigServerConfigurationSource"/>
/// </summary>
/// <param name="source">the <see cref="ConfigServerConfigurationSource"/> the provider uses when accessing the server.</param>
/// <param name="httpClient">the httpClient to use</param>
public ConfigServerConfigurationProvider(ConfigServerConfigurationSource source, HttpClient httpClient)
: this(source.DefaultSettings, source.LogFactory)
{
_client = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
_ = source.Configuration as IConfigurationRoot;
_configuration = WrapWithPlaceholderResolver(source.Configuration);
ConfigurationSettingsHelper.Initialize(PREFIX, _settings, _configuration);
}
internal ConfigEnvironment LoadInternal(bool updateDictionary = true)
{
// Refresh settings with latest configuration values
ConfigurationSettingsHelper.Initialize(PREFIX, _settings, _configuration);
if (!_settings.Enabled)
{
_logger?.LogInformation("Config Server client disabled, did not fetch configuration!");
return(null);
}
if (IsDiscoveryFirstEnabled())
{
var discoveryService = new ConfigServerDiscoveryService(_configuration, _settings, _loggerFactory);
DiscoverServerInstances(discoveryService);
}
// Adds client settings (e.g spring:cloud:config:uri, etc) to the Data dictionary
AddConfigServerClientSettings();
if (_settings.RetryEnabled && _settings.FailFast)
{
var attempts = 0;
var backOff = _settings.RetryInitialInterval;
do
{
_logger?.LogInformation("Fetching config from server at: {0}", _settings.Uri);
try
{
return(DoLoad(updateDictionary));
}
catch (ConfigServerException e)
{
_logger?.LogInformation("Failed fetching config from server at: {0}, Exception: {1}", _settings.Uri, e);
attempts++;
if (attempts < _settings.RetryAttempts)
{
Thread.CurrentThread.Join(backOff);
var nextBackoff = (int)(backOff * _settings.RetryMultiplier);
backOff = Math.Min(nextBackoff, _settings.RetryMaxInterval);
}
else
{
throw;
}
}
}while (true);
}
else
{
_logger?.LogInformation("Fetching config from server at: {0}", _settings.Uri);
return(DoLoad(updateDictionary));
}
}
public virtual IConfigurationProvider Build(IConfigurationBuilder builder)
{
ConfigurationBuilder config = new ConfigurationBuilder();
foreach (IConfigurationSource s in builder.Sources)
{
if (s == this)
{
break;
}
config.Add(s);
}
IConfigurationRoot existing = config.Build();
ConfigurationSettingsHelper.Initialize(PREFIX, _settings, _environment, existing);
return(this);
}
public virtual IConfigurationProvider Build(IConfigurationBuilder builder)
{
ConfigurationBuilder config = new ConfigurationBuilder();
foreach (IConfigurationSource s in builder.Sources)
{
if (s == this)
{
break;
}
config.Add(s);
}
_configuration = WrapWithPlaceholderResolver(config.Build());
ConfigurationSettingsHelper.Initialize(PREFIX, _settings, _configuration);
return(this);
}
private void OnSettingsChanged()
{
var existingPollingInterval = _settings.PollingInterval;
if (_hasConfiguration)
{
ConfigurationSettingsHelper.Initialize(PREFIX, _settings, _configuration);
_configuration.GetReloadToken().RegisterChangeCallback(_ => OnSettingsChanged(), null);
}
if (_settings.PollingInterval == TimeSpan.Zero)
{
_refreshTimer?.Dispose();
}
else if (_refreshTimer == null)
{
_refreshTimer = new Timer(_ => DoLoad(), null, TimeSpan.Zero, _settings.PollingInterval);
}
else if (existingPollingInterval != _settings.PollingInterval)
{
_refreshTimer.Change(TimeSpan.Zero, _settings.PollingInterval);
}
}
