ServiceStack Funq ReuseScope.Request注入相同的对象而不是新实例

时间:2015-08-18 02:32:03

标签: servicestack funq

我遇到ReuseScope.Request的问题。即使我指定ReuseScope.Request,我也会在每个请求上注入相同的实例。我使用这两个调用配置容器以获取MasterConfig:

this.container.RegisterAutoWiredAs<ApiConfigFactory, IConfigFactory>().ReusedWithin(ReuseScope.Container);
this.container.Register(c => c.Resolve<IConfigFactory>().GetMasterConfig(true)).ReusedWithin(ReuseScope.Request);

GetMasterConfig(true)方法返回一个新的具体MasterConfig。但是,当我尝试在服务中使用MasterConfig时,我会在每个请求中获得相同的实例。

public class MyService
{
    private readonly MasterConfig masterConfig;

    public SaleService(MasterConfig masterConfig)
    {
        this.masterConfig = masterConfig;
    }

    public object Post(MyRequest request)
    {
        // **masterConfig is the same instance here on every request**
    }
}

如果我将MasterConfig寄存器的范围更改为ReuseScope.None,我会按预期加载新的MasterConfig。我错过了什么?注册MasterConfig的方式有问题吗?为什么ReuseScope.None解决了这个问题?为什么ReuseScope.Request给我相同的实例?

注意:

2 个答案:

答案 0 :(得分:0)

我无法在自托管主机或ASP.NET主机中重现此问题。

这适用于最新版本的ServiceStack:

//AppHost
public class RequestScopeAppHost : AppSelfHostBase
{
    public RequestScopeAppHost() 
      : base(typeof(RequestScopeAppHost).Name, typeof(RequestScopeService).Assembly) {}

    private static int counter = 0;

    public override void Configure(Container container)
    {
        container.Register(c => new MasterConfig {
            Id = Interlocked.Increment(ref counter)
        }).ReusedWithin(ReuseScope.Request);
    }
}

服务:

public class MasterConfig
{
    public int Id { get; set; }
}

public class GetMasterConfig : IReturn<MasterConfig> { }

public class RequestScopeService : Service
{
    private readonly MasterConfig config;

    public RequestScopeService(MasterConfig config)
    {
        this.config = config;
    }

    public object Any(GetMasterConfig request)
    {
        return config;
    }
}

测试:

[TestFixture]
public class RequestScopeIssue
{
    private readonly ServiceStackHost appHost;

    public RequestScopeIssue()
    {
        appHost = new RequestScopeAppHost()
            .Init()
            .Start(Config.AbsoluteBaseUri);
    }

    [TestFixtureTearDown]
    public void TestFixtureTearDown()
    {
        appHost.Dispose();
    }

    [Test]
    public void Can_get_RequestScope_dependency()
    {
        var client = new JsonServiceClient(Config.AbsoluteBaseUri);

        Assert.That(client.Get(new GetMasterConfig()).Id, Is.EqualTo(1));
        Assert.That(client.Get(new GetMasterConfig()).Id, Is.EqualTo(2));
        Assert.That(client.Get(new GetMasterConfig()).Id, Is.EqualTo(3));
    }
}

在您的说明中ReuseScope.None也按预期工作,它不会重复使用实例。

答案 1 :(得分:0)

使用ServiceStack 4.5.6版本,我也遇到了完全相同的问题

这是我的注册代码

container.RegisterAutoWiredAs<EventConditionalLoadingRepository, IEventConditionalLoadingRepository>()
    .ReusedWithin(ReuseScope.Request);

container.RegisterAutoWiredAs<MetaRiskRepository, IMetaRiskRepository>()
    .ReusedWithin(ReuseScope.Request);

container.RegisterAutoWiredAs<RiskStoreConnectivityService, IRiskStoreConnectivityService>()
    .ReusedWithin(ReuseScope.Request);

container.Register<IUnitOfWork>(c =>
{
    return new UnitOfWork();
}).ReusedWithin(ReuseScope.Request);

container.Register(c => (IUnitOfWorkEnlistable)c.Resolve<IUnitOfWork>())
    .ReusedWithin(ReuseScope.Request); 

这是我的服务,它采用这些依赖

public AnalysisServiceStackService(
    IEventConditionalLoadingRepository eventConditionalLoadingRepository,
    IMetaRiskRepository metaRiskRepository,
    IUnitOfWork unitOfWork)
{

    _eventConditionalLoadingRepository = eventConditionalLoadingRepository;
    _metaRiskRepository = metaRiskRepository;
    _unitOfWork = unitOfWork;
    _log.Information("AnalysisServiceStackService constructed");
}

你可以看到我在那里有一个日志声明,当我通过邮递员为顺序请求点击这个服务时,我记录了这种事情

2017-03-30 15:34:10 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:11 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:12 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:13 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:14 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:15 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:16 [Information] AnalysisServiceStackService constructed
2017-03-30 15:34:17 [Information] AnalysisServiceStackService constructed

所以我知道服务本身应该尝试解析它所需的IOC组件的新PerRequest实例。

如果我然后使用Visual Studio并使用Debug&#34; Make Object ID&#34;功能来检查IOC容器给我的是同一个实例。

致电1:第一次申请

查看Visual Studio创建的#1对象ID

#1 Id

致电2:第二次请求

请参阅#1对象ID,这意味着它不应该是相同的实例。它应该是新请求的新实例

Same object

只是为了证明这些是不同的调用,这里是构造函数运行两次的日志,每次请求一次

Logging after 2 requests

只有为我解决此问题的是重用.None

的建议修复

但是,如果我必须这样做,我也可以使用AutoFac适配器(我更喜欢使用它)并使用标准的AutoFac INstancePerLifeTimeScope:http://docs.autofac.org/en/latest/lifetime/instance-scope.html#instance-per-lifetime-scope

有什么想法吗?