private void InitProviders(string providerPath)
{
lock (_syncObj)
{
if (_providersInititialized)
{
return;
}
_providersInititialized = true;
_listProviders = new ContentListProviderDictionary();
_listProviders.ProviderRequested += OnProviderRequested;
_providerPluginItemStateTracker = new FixedItemStateTracker($"Content Lists - Provider registration for path {providerPath}");
IPluginManager pluginManager = ServiceRegistration.Get <IPluginManager>();
foreach (PluginItemMetadata itemMetadata in pluginManager.GetAllPluginItemMetadata(providerPath))
{
try
{
ContentListProviderRegistration providerRegistration = pluginManager.RequestPluginItem <ContentListProviderRegistration>(providerPath, itemMetadata.Id, _providerPluginItemStateTracker);
if (providerRegistration == null)
{
ServiceRegistration.Get <ILogger>().Warn("Could not instantiate Content List provider with id '{0}'", itemMetadata.Id);
}
else
{
IContentListProvider provider = Activator.CreateInstance(providerRegistration.ProviderClass) as IContentListProvider;
if (provider == null)
{
throw new PluginInvalidStateException("Could not create IContentListProvider instance of class {0}", providerRegistration.ProviderClass);
}
if (_listProviders.ContainsKey(providerRegistration.Key))
{
//The default providers cannot replace existing providers
if (provider.GetType().Assembly != System.Reflection.Assembly.GetExecutingAssembly())
{
//Replace the provider
_listProviders[providerRegistration.Key] = provider;
ServiceRegistration.Get <ILogger>().Info("Successfully replaced Content List '{1}' with provider '{0}' (Id '{2}')", itemMetadata.Attributes["ClassName"], itemMetadata.Attributes["Key"], itemMetadata.Id);
}
}
else
{
_listProviders.Add(providerRegistration.Key, provider);
ServiceRegistration.Get <ILogger>().Info("Successfully activated Content List '{1}' with provider '{0}' (Id '{2}')", itemMetadata.Attributes["ClassName"], itemMetadata.Attributes["Key"], itemMetadata.Id);
}
}
}
catch (PluginInvalidStateException e)
{
ServiceRegistration.Get <ILogger>().Warn("Cannot add IContentListProvider extension with id '{0}'", e, itemMetadata.Id);
}
}
}
}
protected virtual async Task <bool> UpdateProviderAsync(IContentListProvider provider, int maxItems, UpdateReason updateReason)
{
try
{
return(await provider.UpdateItemsAsync(maxItems, updateReason));
}
catch (Exception ex)
{
ServiceRegistration.Get <ILogger>().Error("Error updating Content List {0}", ex, provider.GetType().Name);
return(false);
}
}