通过对象属性表达的不满足的依赖关系

Question

所以我正在构建发布者，以下是我的配置

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="MsmqTransportConfig" type="NServiceBus.Config.MsmqTransportConfig, NServiceBus.Core" />
<section name="UnicastBusConfig" type="NServiceBus.Config.UnicastBusConfig, NServiceBus.Core" />
<section name="DBSubscriptionStorageConfig" type="NServiceBus.Config.DBSubscriptionStorageConfig, NServiceBus.Core" />
</configSections>


<!-- 1. In order to configure remote endpoints use the format: "queue@machine" 
   2. Input queue must be on the same machine as the process feeding off of it.
   3. Error queue can (and often should) be on a different machine.
   4. The community edition doesn't support more than one worker thread.
-->

<MsmqTransportConfig
InputQueue="HomeOfficePublisherQueue"
ErrorQueue="error"
NumberOfWorkerThreads="1"
MaxRetries="5"
/>

<DBSubscriptionStorageConfig>
<NHibernateProperties>
  <add Key="connection.provider"
       Value="NHibernate.Connection.DriverConnectionProvider"/>
  <add Key="connection.driver_class"
       Value="NHibernate.Driver.SqlClientDriver"/>
  <add Key="connection.connection_string"
       Value="Server=<dbserver>;initial catalog=NServiceBus;Integrated Security=SSPI"/>
  <add Key="dialect"
       Value="NHibernate.Dialect.MsSql2005Dialect"/>
 </NHibernateProperties>
</DBSubscriptionStorageConfig>


<UnicastBusConfig
DistributorControlAddress=""
DistributorDataAddress=""
ForwardReceivedMessagesTo="">
<MessageEndpointMappings>
</MessageEndpointMappings>
</UnicastBusConfig>


</configuration>

，这是我的端点

class EndpointConfig : IConfigureThisEndpoint, AsA_Publisher, IWantCustomInitialization
{
    public void Init()
    {
        NServiceBus.Configure.With()
            .Log4Net()
            .DefaultBuilder()
            .XmlSerializer()
            .UnicastBus()
            .ImpersonateSender(false)
            .MsmqTransport()
            .IsTransactional(true)
            .DBSubcriptionStorage();
    }
}

}

启动端点时出现以下异常

异常，已记录错误。原因：创建名为“NServiceBus.Unicast.UnicastBus”的对象时出错：通过对象属性“SubscriptionStorage”表达的依赖关系不满足：有 2 个类型为 [NServiceBus.Unicast.Subscriptions.ISubscriptionStorage] 的对象用于按类型自动装配，而本应有只需 1 即可自动装配对象“NServiceBus.Unicast.UnicastBus”的属性“SubscriptionStorage”。

任何帮助表示赞赏

Answer 1

我刚刚遇到了同样的问题，并通过在配置末尾调用 .CreateBus() 解决了它：

class EndpointConfig : IConfigureThisEndpoint, AsA_Publisher, IWantCustomInitialization
{
    public void Init()
    {
        NServiceBus.Configure.With()
            .Log4Net()
            .DefaultBuilder()
            .XmlSerializer()
            .UnicastBus()
            .ImpersonateSender(false)
            .MsmqTransport()
            .IsTransactional(true)
            .DBSubcriptionStorage()
            .CreateBus();
    }
}

Answer 2

仅当角色的设置符合您的要求时才使用这些角色。尝试删除 As_aPublisher 并查看是否适合您。在您的情况下，角色和您自己的代码都会注册一个 sub.storeage，这就是给您带来例外的原因。