2

我正在将 Web api 服务连接到后端无状态服务。

Backservice 称为 MyProject.Management.Company，其代码为：

internal sealed class Company: StatelessService,ICompanyManagement
{
    private readonly CompanyManagementImpl _impl;

    public Tenents(StatelessServiceContext context, CompanyManagementImpl impl)
        : base(context)
    {
        this._impl = impl;
    }



    /// <summary>
    /// Optional override to create listeners (e.g., TCP, HTTP) for this service replica to handle client or user requests.
    /// </summary>
    /// <returns>A collection of listeners.</returns>
    protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
    {
        return new[]
        {
            new ServiceInstanceListener(serviceContext => new FabricTransportServiceRemotingListener(serviceContext, this), "ServiceEndpoint")
        };
    }

    /// <summary>
    /// This is the main entry point for your service instance.
    /// </summary>
    /// <param name="cancellationToken">Canceled when Service Fabric needs to shut down this service instance.</param>
    protected override async Task RunAsync(CancellationToken cancellationToken)
    {
        // TODO: Replace the following sample code with your own logic 
        //       or remove this RunAsync override if it's not needed in your service.

        long iterations = 0;

        while (true)
        {
            cancellationToken.ThrowIfCancellationRequested();

            ServiceEventSource.Current.ServiceMessage(this.Context, "Working-{0}", ++iterations);

            await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);
        }
    }

    public Task CreateCompany(Company company)
    {
        return _impl.CreateCompany(company);
    }
    public Task<List<Company>> GetAllCompanies()
    {
        return _impl.GetAllCompanies();
    }

    public Task<Company> GetCompanyById(string companyId)
    {
        return _impl.GetCompanyById(companyId);
    }
}

代码是从This Blog Post采用的Listener 代码，甚至文档代码都没有编译文档 ，CreateServiceRemotingListenervextension 方法不存在。

ICompanyManagement 是从 IService 接口继承的接口，实现是通过 CompanyManagament 实现的，在这个阶段只返回静态对象。

该 API 称为MyProject.Portal，控制器代码为：

public class CompanyController : Controller
    {
        ICompanyManagement _proxy;
        public CompanyController(StatelessServiceContext context)
        {
            string serviceUri = $"{context.CodePackageActivationContext.ApplicationName}" + "/MyProject.Management.Company";


            _proxy = ServiceProxy.Create<ICompanyManagement>(new Uri(serviceUri));


        }

        // GET: api/Company
        [HttpGet]
        public async Task<JsonResult> Get()
        {
            try
            {
                var result = await _proxy.GetAllCompanies();

                return this.Json(result);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }

当代码运行时，它会返回以下错误。

NamedEndpoint 'V2Listener' 在地址'{"Endpoints":{"ServiceEndpoint":"localhost:59286+12a705ed-11a5-4bf5-bafd-84179c966257-131719261525940414-9e876439-9294-4ec9-8b34-05f1751}}a 中找不到对于分区 '12a705ed-11a5-4bf5-bafd-84179c966257'

最后：我使用的是.netcore v2，服务结构 v6.2.274。

4

1 回答 1

3

在您的ICompanyManagement文件中使用之后立即添加以下行：

[assembly: FabricTransportServiceRemotingProvider(RemotingListener = RemotingListener.V2Listener, RemotingClient = RemotingClient.V2Client)]

在您的服务（CompanyManagement）清单（ServiceManifest.xml文件）中，确保端点设置为版本 2：

<Resources>
    <Endpoints>
        <Endpoint Name="ServiceEndpointV2" />  
    </Endpoints>
</Resources>

将您的 CreateServiceInstanceListeners 方法更改为：

protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
{
    return this.CreateServiceRemotingInstanceListeners();
}

最后在您的 web api 控制器中注册您的服务代理，如下所示：

ICompanyManagement companyManagementClient = ServiceProxy.Create<ICompanyManagement>(new Uri($"fabric:/{applicationName}/{serviceName}"));

如果您按照这些步骤操作，它将起作用。

于 2018-05-28T14:44:41.067 回答