public static ISettingsStorage GetSettings(ICompositionCatalog compositionCatalog, string contentTypeName)
{
ISettingsStorage settingsStorage = null;
lock (_settingsLock) {
if (_settingStorageMap.TryGetValue(contentTypeName, out settingsStorage))
{
return(settingsStorage);
}
// Need to find the settings using MEF (don't use MEF inside of other locks, that can lead to deadlock)
var contentTypeRegistry = compositionCatalog.ExportProvider.GetExportedValue <IContentTypeRegistryService>();
var contentType = contentTypeRegistry.GetContentType(contentTypeName);
Debug.Assert(contentType != null, "Cannot find content type object for " + contentTypeName);
settingsStorage = ComponentLocatorForOrderedContentType <IWritableSettingsStorage> .FindFirstOrderedComponent(compositionCatalog.CompositionService, contentType);
if (settingsStorage == null)
{
settingsStorage = ComponentLocatorForOrderedContentType <ISettingsStorage> .FindFirstOrderedComponent(compositionCatalog.CompositionService, contentType);
}
if (settingsStorage == null)
{
var storages = ComponentLocatorForContentType <IWritableSettingsStorage, IComponentContentTypes> .ImportMany(compositionCatalog.CompositionService, contentType);
if (storages.Any())
{
settingsStorage = storages.First().Value;
}
}
if (settingsStorage == null)
{
var readonlyStorages = ComponentLocatorForContentType <ISettingsStorage, IComponentContentTypes> .ImportMany(compositionCatalog.CompositionService, contentType);
if (readonlyStorages.Any())
{
settingsStorage = readonlyStorages.First().Value;
}
}
Debug.Assert(settingsStorage != null, String.Format(CultureInfo.CurrentCulture,
"Cannot find settings storage export for content type '{0}'", contentTypeName));
if (_settingStorageMap.ContainsKey(contentTypeName))
{
// some other thread came along and loaded settings already
settingsStorage = _settingStorageMap[contentTypeName];
}
else
{
_settingStorageMap[contentTypeName] = settingsStorage;
settingsStorage.LoadFromStorage();
}
}
return(settingsStorage);
}
