Question

我有一个实验性的NServiceBus项目正在运行，其中包含：

MyProject.Core - 使用NServiceBus.Host.exe的消息发布者
MyProject.Subscriber =使用NServiceBus.Host.exe消息订阅者1
MyProject.ConsoleSubscriber - 具有显式初始化和订阅的.NET控制台应用
MyProject.WebApp - ASP.NET MVC 2 Web应用程序

当我启动项目时，NSB托管订阅者正在从核心接收消息 - 但是Web应用程序和控制台应用程序不是;永远不会命中消息处理程序内的断点，并且我在VS输出窗口中没有得到任何诊断输出。

控制台应用程序具有以下代码：

using System;
using MyProject.Messages.PublishedByCore;
using NServiceBus;

namespace MyProject.ConsoleSubscriber {
    class Program {
        static void Main(string[] args) {

            var bus = NServiceBus.Configure.With()
                .Log4Net()
                .DefaultBuilder()
                .XmlSerializer()
                .MsmqTransport()
                    .IsTransactional(false)
                    .PurgeOnStartup(false)
                .UnicastBus()
                    .ImpersonateSender(false)
                .CreateBus()
                .Start();
            bus.Subscribe<FileChangedMessage>();
            while (Console.ReadLine() != null) { }
        }
    }

    public class FileChangedMessageHandler : IHandleMessages<FileChangedMessage> {
        public void Handle(FileChangedMessage message) {
            Console.WriteLine(message.FilePath);
        }
    }
}

以及以下App.config文件：

<?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" />
    </configSections>
    <MsmqTransportConfig InputQueue="MyConsoleClient" ErrorQueue="error" NumberOfWorkerThreads="1" MaxRetries="5" />
    <UnicastBusConfig>
        <MessageEndpointMappings>
            <add Messages="MyProject.Messages.PublishedByCore" Endpoint="MyProjectCoreInputQueue" />
        </MessageEndpointMappings>
    </UnicastBusConfig>
</configuration>

Web应用程序的Global.asax.cs如下：

using System.Diagnostics;
using System.Web.Mvc;
using System.Web.Routing;
using MyProject.Messages.PublishedByCore;
using NServiceBus;

namespace MyProject.WebApp {
    public class MvcApplication : System.Web.HttpApplication {
        public static void RegisterRoutes(RouteCollection routes) {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );
        }

        public static IBus Bus { get; set; }

        protected void Application_Start() {
            Bus = NServiceBus.Configure.WithWeb()
                .Log4Net()
                .DefaultBuilder()
                .XmlSerializer()
                .MsmqTransport()
                    .IsTransactional(false)
                    .PurgeOnStartup(false)
                .UnicastBus()
                    .ImpersonateSender(false)
                .CreateBus()
                .Start();
            Bus.Subscribe<FileChangedMessage>(); RegisterRoutes(RouteTable.Routes);
        }
    }

    public class FileChangedMessageHandler : IHandleMessages<FileChangedMessage> {
        public void Handle(FileChangedMessage message) {
            Debug.WriteLine(message.FilePath);
        }
    }
}

并且Web.config文件的相关部分是：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <configSections>
        <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
            <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
                <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
                <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
                    <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
                    <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
                    <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
                    <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
                </sectionGroup>
            </sectionGroup>
        </sectionGroup>
        <section name="MsmqTransportConfig" type="NServiceBus.Config.MsmqTransportConfig, NServiceBus.Core" />
        <section name="UnicastBusConfig" type="NServiceBus.Config.UnicastBusConfig, NServiceBus.Core" />
    </configSections>
    <MsmqTransportConfig InputQueue="MyWebClient" ErrorQueue="error" NumberOfWorkerThreads="1" MaxRetries="5" />
    <UnicastBusConfig>
        <MessageEndpointMappings>
            <add Messages="MyProject.Messages.PublishedByCore" Endpoint="MyProjectCoreInputQueue" />
        </MessageEndpointMappings>
    </UnicastBusConfig>

据我所知，除了Congfigure.With() vs Configure.WithWeb()之外，网络和控制台订阅者中的配置和初始化代码都是相同的 - 所以我无法理解为什么这不起作用。是否需要一些额外的配置才能从我缺少的.NET Web应用程序中实际订阅消息队列？

Answer 1

D'哦。

两个应用都需要调用.LoadMessageHandlers（） - 我需要学习区分NServiceBus诊断日志和我自己的消息处理程序输出...

var bus = NServiceBus.Configure.With()
    .Log4Net()
    .DefaultBuilder()
    .XmlSerializer()
    .MsmqTransport()
        .IsTransactional(false)
        .PurgeOnStartup(false)
    .UnicastBus()
        // THIS IS THE LINE THAT MAKES IT WORK!
        .LoadMessageHandlers()
        .ImpersonateSender(false)
    .CreateBus()
    .Start();

糟糕。

使用NServiceBus订阅队列消息 - 在控制台应用程序中工作;在ASP.NET MVC Web应用程序中不起作用

1 个答案: