Question

我有两个业务域（DomainA和DomainB），它们在各自的数据库（独立的服务器）中的NServiceBus封装点使用各自的SQL Transport。

我的理解是，您可以通过路由器将它们从一个域发送/发布到另一个域。官方文档清楚地表明它是possible。出于复制目的，我进行了更新并发布sample并对其进行了修改，以便两个端点都使用SQL Server传输+ SQL持久性。

目标是从DomainA发布一条消息，并在DomainB中对其进行处理。

DomainA（网络应用程序）-没有路由器配置，因为它仅发布演示内容：

var endpointConfiguration = new EndpointConfiguration("DomainA-Endpoint");

var transport = endpointConfiguration.UseTransport<SqlServerTransport>();
transport.ConnectionString(ConnectionStrings.DomainA);
transport.Transactions(TransportTransactionMode.SendsAtomicWithReceive);

var persistence = endpointConfiguration.UsePersistence<SqlPersistence>();
persistence.SqlDialect<SqlDialect.MsSqlServer>();
persistence.ConnectionBuilder(
    connectionBuilder: () =>
    {
        return new SqlConnection(ConnectionStrings.DomainA);
    });
var subscriptions = persistence.SubscriptionSettings();
subscriptions.DisableCache();
endpointConfiguration.EnableInstallers();

DomainB-连接到路由器以发布事件：

var endpointConfiguration = new EndpointConfiguration("DomainB-Endpoint");
var transport = endpointConfiguration.UseTransport<SqlServerTransport>();
transport.ConnectionString(ConnectionStrings.DomainB);
transport.Transactions(TransportTransactionMode.SendsAtomicWithReceive);

var persistence = endpointConfiguration.UsePersistence<SqlPersistence>();
persistence.SqlDialect<SqlDialect.MsSqlServer>();
persistence.ConnectionBuilder(
    connectionBuilder: () =>
    {
        return new SqlConnection(ConnectionStrings.DomainB);
    });
var subscriptions = persistence.SubscriptionSettings();
subscriptions.DisableCache();
endpointConfiguration.EnableInstallers();

var routerConnector = transport.Routing().ConnectToRouter("DomainA-B-Router");
routerConnector.RegisterPublisher(
    eventType: typeof(OrderAccepted),
    publisherEndpointName: "DomainA-Endpoint");

还有路由器：

var routerConfig = new RouterConfiguration("DomainA-B-Router");

var domainAInterface = routerConfig.AddInterface<SqlServerTransport>("DomainA", t =>
{
    t.ConnectionString(ConnectionStrings.DomainA);
    t.Transactions(TransportTransactionMode.SendsAtomicWithReceive);
});
var domainASqlSubscriptionStorage = new SqlSubscriptionStorage(
    () => new SqlConnection(ConnectionStrings.Router),
    "DomainA-", new SqlDialect.MsSqlServer(), null);
domainAInterface.EnableMessageDrivenPublishSubscribe(domainASqlSubscriptionStorage);

var domainBInterface = routerConfig.AddInterface<SqlServerTransport>("DomainB", t =>
{
    t.ConnectionString(ConnectionStrings.DomainB);
    t.Transactions(TransportTransactionMode.SendsAtomicWithReceive);
});
var domainBSqlSubscriptionStorage = new SqlSubscriptionStorage(
    () => new SqlConnection(ConnectionStrings.Router),
    "DomainB-", new SqlDialect.MsSqlServer(), null);
domainBInterface.EnableMessageDrivenPublishSubscribe(domainBSqlSubscriptionStorage);

var staticRouting = routerConfig.UseStaticRoutingProtocol();
staticRouting.AddForwardRoute("DomainA", "DomainB");
staticRouting.AddForwardRoute("DomainB", "DomainA");

domainASqlSubscriptionStorage.Install().GetAwaiter().GetResult();
domainBSqlSubscriptionStorage.Install().GetAwaiter().GetResult();

routerConfig.AutoCreateQueues();

为简洁起见，省略了用于启动端点和路由器的代码。

连接字符串如下-为DomainA和DomainB使用不同的SQL实例：

public class ConnectionStrings
{
    public const string DomainA = @"Data Source=(local);Initial Catalog=Nsb-DomainA-Endpoint-DB;Integrated Security=True;Max Pool Size=100";
    public const string DomainB = @"Data Source=(localDB)\MSSQLLocalDB;Initial Catalog=Nsb-DomainB-Endpoint-DB;Integrated Security=True;Max Pool Size=100";
    public const string Router = @"Data Source=(local);Initial Catalog=Nsb-DomainA-B-Router-DB;Integrated Security=True;Max Pool Size=100";
}

运行示例时，在路由器中出现以下错误：

2019-07-10 11:46:08.889 WARN  RepeatedFailuresCircuitBreaker The circuit breaker for DomainA-B-Router is now in the armed state
2019-07-10 11:46:15.955 WARN  RepeatedFailuresCircuitBreaker The circuit breaker for DomainA-B-Router will now be triggered
2019-07-10 11:46:15.991 ERROR ThrottlingRawEndpointConfig`1[[NServiceBus.SqlServerTransport, NServiceBus.Transport.SqlServer, Version=4.0.0.0, Culture=neutral, PublicKeyToken=9fc386479f8a226c]] Persistent error while processing messages in DomainA-B-Router. Entering throttled mode.
NServiceBus.Unicast.Queuing.QueueNotFoundException: Failed to send message to [Nsb-DomainA-Endpoint-DB].[dbo].[DomainA-Endpoint] ---> System.Data.SqlClient.SqlException: Invalid object name 'Nsb-DomainA-Endpoint-DB.dbo.DomainA-Endpoint'.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
   at System.Data.SqlClient.SqlCommand.CompleteAsyncExecuteReader(Boolean isInternal, Boolean forDescribeParameterEncryption)
   at System.Data.SqlClient.SqlCommand.InternalEndExecuteNonQuery(IAsyncResult asyncResult, String endMethod, Boolean isInternal)
   at System.Data.SqlClient.SqlCommand.EndExecuteNonQueryInternal(IAsyncResult asyncResult)
   at System.Data.SqlClient.SqlCommand.EndExecuteNonQueryAsync(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.TableBasedQueue.<SendRawMessage>d__10.MoveNext()
   --- End of inner exception stack trace ---
   at NServiceBus.Transport.SQLServer.TableBasedQueue.ThrowQueueNotFoundException(SqlException ex)
   at NServiceBus.Transport.SQLServer.TableBasedQueue.<SendRawMessage>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.TableBasedQueueDispatcher.<Send>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.TableBasedQueueDispatcher.<DispatchUsingReceiveTransaction>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.TableBasedQueueDispatcher.<DispatchAsNonIsolated>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.MessageDispatcher.<Dispatch>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at PostroutingTerminator.<Terminate>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.ChainTerminator`1.<Invoke>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.TerminatorInvocationRule`1.<Invoke>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at ForwardSubscribeMessageDrivenRule.<Terminate>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.ChainTerminator`1.<Invoke>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.TerminatorInvocationRule`1.<Invoke>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at SubscribePreroutingTerminator.<Terminate>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.ChainTerminator`1.<Invoke>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.TerminatorInvocationRule`1.<Invoke>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at StorageDrivenSubscriptionRule.<Invoke>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at PreroutingToSubscribePreroutingFork.<Terminate>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.ChainTerminator`1.<Invoke>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at NServiceBus.Router.TerminatorInvocationRule`1.<Invoke>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at ThrottlingRawEndpointConfig`1.<>c__DisplayClass1_0.<<PrepareConfig>b__1>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.ReceiveStrategy.<TryProcessingMessage>d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NServiceBus.Transport.SQLServer.ProcessWithNativeTransaction.<TryProcess>d__3.MoveNext()

我们可以看到路由器正在尝试访问DomainA DB，并且在调试时，我们可以看到它是通过DomainB连接来访问的，由于它们位于不同的服务器上，因此该连接无法工作。如果我将DomainB的连接字符串更改为指向同一SQL实例，则一切正常（假设同一用户有权访问所有数据库）。

我认为路由器的作用是在实例之间移动消息，但是我未能实现。我在做错什么吗？

为什么路由器和端点将相同的连接用于订阅数据？

感谢您的帮助！

完整代码可用here。

Answer 1

我下载了代码并升级到最新版本的Router（3.8.1），它可以正常工作-消息已发布并分发给两个订户。

两个SQL传输之间的NServiceBus路由器失败

1 个答案: