/// <summary>
/// Initializes the <see cref="SyndicationManager"/> using the declaratively configured application settings.
/// </summary>
/// <seealso cref="SyndicationResourceSection"/>
private static void Initialize()
{
//------------------------------------------------------------
// Verify manager has not already been initialized previously
//------------------------------------------------------------
if (syndicationManagerInitialized)
{
//------------------------------------------------------------
// Throw stored exception if initialization raised an exception
//------------------------------------------------------------
if (syndicationManagerInitializationException != null)
{
throw syndicationManagerInitializationException;
}
}
else
{
//------------------------------------------------------------
// Throw stored exception if initialization raised an exception
//------------------------------------------------------------
if (syndicationManagerInitializationException != null)
{
throw syndicationManagerInitializationException;
}
lock (syndicationManagerLock)
{
try
{
//------------------------------------------------------------
// Extract configuration section from application configuration
//------------------------------------------------------------
SyndicationResourceSection section = PrivilegedConfigurationManager.GetSyndicationResourceSection();
if (section != null)
{
//------------------------------------------------------------
// Raise exception if no providers were specified
//------------------------------------------------------------
if (((section.DefaultProvider == null) || (section.Providers == null)) || (section.Providers.Count < 1))
{
throw new ProviderException(String.Format(null, "The syndication resource providers were not specified. Source configuration file was {0}", section.ElementInformation.Source));
}
//------------------------------------------------------------
// Fill providers collection
//------------------------------------------------------------
syndicationManagerProviders = new SyndicationResourceProviderCollection();
if (HostingEnvironment.IsHosted)
{
ProvidersHelper.InstantiateProviders(section.Providers, syndicationManagerProviders, typeof(SyndicationResourceProvider));
}
else
{
foreach (ProviderSettings settings in section.Providers)
{
Type settingsType = Type.GetType(settings.Type, true, true);
if (!typeof(SyndicationResourceProvider).IsAssignableFrom(settingsType))
{
throw new ArgumentException(String.Format(null, "The provider must implement type of {0}. Source configuration file was {1}", typeof(SyndicationResourceProvider).FullName, section.ElementInformation.Source));
}
SyndicationResourceProvider provider = (SyndicationResourceProvider)Activator.CreateInstance(settingsType);
NameValueCollection parameters = settings.Parameters;
NameValueCollection configuration = new NameValueCollection(parameters.Count, StringComparer.Ordinal);
foreach (string parameter in parameters)
{
configuration[parameter] = parameters[parameter];
}
provider.Initialize(settings.Name, configuration);
syndicationManagerProviders.Add(provider);
}
}
//------------------------------------------------------------
// Set and validate default provider
//------------------------------------------------------------
syndicationManagerDefaultProvider = syndicationManagerProviders[section.DefaultProvider];
if (syndicationManagerDefaultProvider == null)
{
throw new ConfigurationErrorsException(String.Format(null, "The default syndication resource provider was not found. Source configuration file was {0}", section.ElementInformation.Source), section.ElementInformation.Properties["defaultProvider"].Source, section.ElementInformation.Properties["defaultProvider"].LineNumber);
}
//------------------------------------------------------------
// Prevent collection from being modified further
//------------------------------------------------------------
syndicationManagerProviders.SetReadOnly();
}
}
catch(Exception exception)
{
//------------------------------------------------------------
// Store exception locally and then throw
//------------------------------------------------------------
syndicationManagerInitializationException = exception;
throw;
}
//------------------------------------------------------------
// Set initialization indicator flag
//------------------------------------------------------------
syndicationManagerInitialized = true;
}
}
}
//============================================================
// PRIVATE METHODS
//============================================================
#region Initialize()
/// <summary>
/// Initializes the <see cref="SyndicationManager"/> using the declaratively configured application settings.
/// </summary>
/// <seealso cref="SyndicationResourceSection"/>
private static void Initialize()
{
//------------------------------------------------------------
// Verify manager has not already been initialized previously
//------------------------------------------------------------
if (syndicationManagerInitialized)
{
//------------------------------------------------------------
// Throw stored exception if initialization raised an exception
//------------------------------------------------------------
if (syndicationManagerInitializationException != null)
{
throw syndicationManagerInitializationException;
}
}
else
{
//------------------------------------------------------------
// Throw stored exception if initialization raised an exception
//------------------------------------------------------------
if (syndicationManagerInitializationException != null)
{
throw syndicationManagerInitializationException;
}
lock (syndicationManagerLock)
{
try
{
//------------------------------------------------------------
// Extract configuration section from application configuration
//------------------------------------------------------------
SyndicationResourceSection section = PrivilegedConfigurationManager.GetSyndicationResourceSection();
if (section != null)
{
//------------------------------------------------------------
// Raise exception if no providers were specified
//------------------------------------------------------------
if (((section.DefaultProvider == null) || (section.Providers == null)) || (section.Providers.Count < 1))
{
throw new ProviderException(String.Format(null, "The syndication resource providers were not specified. Source configuration file was {0}", section.ElementInformation.Source));
}
//------------------------------------------------------------
// Fill providers collection
//------------------------------------------------------------
syndicationManagerProviders = new SyndicationResourceProviderCollection();
if (HostingEnvironment.IsHosted)
{
ProvidersHelper.InstantiateProviders(section.Providers, syndicationManagerProviders, typeof(SyndicationResourceProvider));
}
else
{
foreach (ProviderSettings settings in section.Providers)
{
Type settingsType = Type.GetType(settings.Type, true, true);
if (!typeof(SyndicationResourceProvider).IsAssignableFrom(settingsType))
{
throw new ArgumentException(String.Format(null, "The provider must implement type of {0}. Source configuration file was {1}", typeof(SyndicationResourceProvider).FullName, section.ElementInformation.Source));
}
SyndicationResourceProvider provider = (SyndicationResourceProvider)Activator.CreateInstance(settingsType);
NameValueCollection parameters = settings.Parameters;
NameValueCollection configuration = new NameValueCollection(parameters.Count, StringComparer.Ordinal);
foreach (string parameter in parameters)
{
configuration[parameter] = parameters[parameter];
}
provider.Initialize(settings.Name, configuration);
syndicationManagerProviders.Add(provider);
}
}
//------------------------------------------------------------
// Set and validate default provider
//------------------------------------------------------------
syndicationManagerDefaultProvider = syndicationManagerProviders[section.DefaultProvider];
if (syndicationManagerDefaultProvider == null)
{
throw new ConfigurationErrorsException(String.Format(null, "The default syndication resource provider was not found. Source configuration file was {0}", section.ElementInformation.Source), section.ElementInformation.Properties["defaultProvider"].Source, section.ElementInformation.Properties["defaultProvider"].LineNumber);
}
//------------------------------------------------------------
// Prevent collection from being modified further
//------------------------------------------------------------
syndicationManagerProviders.SetReadOnly();
}
}
catch (Exception exception)
{
//------------------------------------------------------------
// Store exception locally and then throw
//------------------------------------------------------------
syndicationManagerInitializationException = exception;
throw;
}
//------------------------------------------------------------
// Set initialization indicator flag
//------------------------------------------------------------
syndicationManagerInitialized = true;
}
}
}
