public IConfigurationRoot Build()
{
foreach (var configuration in _remoteConfigurationOptions.Configurations)
{
var source = new RemoteConfigurationSource
{
ConfigurationServiceUri = _remoteConfigurationOptions.ServiceUri,
HttpMessageHandler = _remoteConfigurationOptions.HttpMessageHandler,
RequestTimeout = _remoteConfigurationOptions.RequestTimeout,
LoggerFactory = _remoteConfigurationOptions.LoggerFactory,
ConfigurationName = configuration.ConfigurationName,
Optional = configuration.Optional,
ReloadOnChange = configuration.ReloadOnChange,
Parser = configuration.Parser,
CreateSubscriber = _remoteConfigurationOptions.CreateSubscriber
};
Add(source);
}
return(_configurationBuilder.Build());
}
public RemoteConfigurationProvider(RemoteConfigurationSource source)
{
_source = source ?? throw new ArgumentNullException(nameof(source));
if (source.ConfigurationName == null)
{
throw new ArgumentNullException(nameof(source.ConfigurationName));
}
if (source.ConfigurationServiceUri == null)
{
throw new ArgumentNullException(nameof(source.ConfigurationServiceUri));
}
Logger.LoggerFactory = source.LoggerFactory ?? new NullLoggerFactory();
_logger = Logger.CreateLogger <RemoteConfigurationProvider>();
_logger.LogInformation("Initializing remote configuration source for configuration '{ConfigurationName}'.", source.ConfigurationName);
_httpClient = new Lazy <HttpClient>(CreateHttpClient);
_parser = source.Parser;
if (_parser == null)
{
var extension = Path.GetExtension(source.ConfigurationName).ToLower();
_logger.LogInformation("A file parser was not specified. Attempting to resolve parser from file extension '{extension}'.", extension);
switch (extension)
{
case ".ini":
_parser = new IniConfigurationFileParser();
break;
case ".xml":
_parser = new XmlConfigurationFileParser();
break;
case ".yaml":
_parser = new YamlConfigurationFileParser();
break;
default:
_parser = new JsonConfigurationFileParser();
break;
}
}
_logger.LogInformation("Using parser {Name}.", _parser.GetType().Name);
if (source.ReloadOnChange)
{
if (source.Subscriber == null)
{
_logger.LogWarning("ReloadOnChange is enabled but a subscriber has not been configured.");
return;
}
var subscriber = source.Subscriber();
_logger.LogInformation("Initializing remote configuration {Name} subscriber for configuration '{ConfigurationName}'.", subscriber.Name, source.ConfigurationName);
subscriber.Subscribe(source.ConfigurationName, message =>
{
_logger.LogInformation("Received remote configuration change subscription for configuration '{ConfigurationName}' with hash {message}. " +
"Current hash is {Hash}.", source.ConfigurationName, message, Hash);
if (message != null && message.ToString().Equals(Hash, StringComparison.OrdinalIgnoreCase))
{
_logger.LogInformation("Configuration '{ConfigurationName}' current hash {Hash} matches new hash. " +
"Configuration will not be updated.", source.ConfigurationName, Hash);
return;
}
Load();
OnReload();
});
}
}
