/// <summary>
/// Instances this instance.
/// </summary>
/// <returns></returns>
public static LogProvider Instance()
{
// Use the cache because the reflection used later is expensive
Cache cache = HttpRuntime.Cache;
string cacheKey;
// Get the names of providers
ProviderConfiguration config;
config = ProviderConfiguration.GetProviderConfiguration(providerType);
//If config not found (missing web.config)
if (config == null)
{
//Try to provide a default anyway
XmlDocument defaultNode = new XmlDocument();
defaultNode.LoadXml(
"<log defaultProvider=\"Log4NetLog\"><providers><clear /><add name=\"Log4NetLog\" type=\"Rainbow.Framework.Logging.Log4NetLogProvider, Rainbow.Provider.Implementation\" /></providers></log>");
// Get the names of providers
config = new ProviderConfiguration();
config.LoadValuesFromConfigurationXml(defaultNode.DocumentElement);
}
// Read specific configuration information for this provider
ProviderSettings providerSettings = (ProviderSettings)config.Providers[config.DefaultProvider];
// In the cache?
cacheKey = "Rainbow::Configuration::Log::" + config.DefaultProvider;
if (cache[cacheKey] == null)
{
// The assembly should be in \bin or GAC, so we simply need
// to get an instance of the type
try
{
cache.Insert(cacheKey, ProviderHelper.InstantiateProvider(providerSettings, typeof(LogProvider)));
}
catch (Exception e)
{
throw new Exception("Unable to load provider", e);
}
}
return((LogProvider)cache[cacheKey]);
}