/// <summary>
/// 从程序集中获取可用的服务类型。
/// </summary>
/// <param name="serviceTypeHarvester">服务类型收集者。</param>
/// <param name="assembly">程序集。</param>
/// <returns>可用的服务类型。</returns>
public static Type[] GetTypes(this IServiceTypeHarvester serviceTypeHarvester, Assembly assembly)
{
serviceTypeHarvester.NotNull("serviceTypeHarvester");
assembly.NotNull("assembly");
return(serviceTypeHarvester.GeTypes(assembly.GetTypes()));
}
private Feature LoadFeature(FeatureDescriptor featureDescriptor)
{
var extensionDescriptor = featureDescriptor.Extension;
var featureId = featureDescriptor.Id;
var extensionId = extensionDescriptor.Id;
ExtensionEntry extensionEntry;
try
{
extensionEntry = _cacheManager.Get(extensionId, ctx =>
{
var entry = BuildEntry(extensionDescriptor);
if (entry != null)
{
ctx.Monitor(_asyncTokenProvider.GetToken(monitor =>
{
foreach (var loader in _loaders.Value)
{
loader.Monitor(entry.Descriptor, monitor);
}
}));
}
return(entry);
});
}
catch (Exception ex)
{
Logger.Error(ex, "加载扩展 '{0}' 失败", extensionId);
throw new RabbitException(T("加载扩展 '{0}' 失败。", extensionId), ex);
}
if (extensionEntry == null)
{
//如果该功能因为某种原因不能被编译，返回一个"null"的特性，即没有输出的类型的功能。
return(new Feature
{
Descriptor = featureDescriptor,
ExportedTypes = Enumerable.Empty <Type>()
});
}
var extensionTypes = _serviceTypeHarvester.GeTypes(extensionEntry.ExportedTypes);
var featureTypes = extensionTypes.Where(
i =>
string.Equals(GetSourceFeatureNameForType(i, extensionId), featureId,
StringComparison.OrdinalIgnoreCase)).ToArray();
return(new Feature
{
Descriptor = featureDescriptor,
ExportedTypes = featureTypes
});
}