Question

我正在使用基于洋葱架构this实施的架构。我决定挑战自己用NLog更改NHibernates默认记录器（log4net）。我理解如何配置NLog，但是我在LogerFactory类中解析我对记录器的依赖性有困难。目前，我的NHibernate项目只知道我的日志记录界面。如何让我的NHibernate项目解决依赖？

这是我现在的程序结构： Console App初始化ninject并设置我的模块，包括我的LoggingModule和我的RepositoryModule。我第一次需要来自我的存储库的东西，我的SessionHelper类构建我的会话并配置NHibernate。这是NHibernate调用我的LoggerFactory的地方（LoggerFactory实现了NHibernates ILoggerFactory）。 NHibernate调用LoggerFor（Type类型）; type作为NHibernate.Cfg.Configuration传入。从这里开始，我需要通过我的ILoggingService获取NLog的实例，这是我感到困惑的地方。我如何解决此依赖关系？我的控制台应用程序知道解决方案，因为这是我构建内核并加载模块的地方。我在这里设置另一个内核吗？解决这个问题的最佳方法是什么？

编辑：这是我目前的代码：

Program.cs的

namespace ZeroBase.ManualConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            IKernel kernel = CreateKernel();

            CoreService service = new CoreService(
                kernel.Get<ZeroBase.Domain.Interfaces.IUserRepository>(), 
                kernel.Get<ZeroBase.Domain.Interfaces.ICommentRepository>());

            //.........

        }

        static IKernel CreateKernel()
        {
            IKernel kernel = new StandardKernel();
            RegisterServices(kernel);
            return kernel;
        }

        static void RegisterServices(IKernel kernel)
        {
            // Bind Core Service
            kernel.Bind<ICoreService>().To<CoreService>();

            // Add data and infrastructure modules
            var modules = new List<INinjectModule>
            {
                new ConfigModule(),
                new LoggingModule(),
                new RepositoryModule()
            };

            kernel.Load(modules);
        }

    }
}

LoggingModule.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Ninject.Modules;
using ZeroBase.Infrastructure.Interfaces;
using NLog.Config;
using NLog;
using ZeroBase.Infrastructure.Logging;

namespace ZeroBase.Infrastructure.DependencyResolution
{
    public class LoggingModule : NinjectModule
    {
        public override void Load()
        {
            ILoggingService logger = GetLoggingService();
            Bind<ILoggingService>().ToConstant(logger);
        }

        private ILoggingService GetLoggingService()
        {
            ConfigurationItemFactory.Default.LayoutRenderers
                .RegisterDefinition("utc_date", typeof(UtcDateRenderer));
            ConfigurationItemFactory.Default.LayoutRenderers
                .RegisterDefinition("web_variables", typeof(WebVariablesRenderer));
            ILoggingService logger = (ILoggingService)LogManager.GetLogger("NLogLogger", typeof(LoggingService));
            return logger;
        }
    }
}

RepositoryModule.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Ninject;
using Ninject.Modules;

using ZeroBase.Infrastructure.Interfaces;
using ZeroBase.Domain.Interfaces;
using ZeroBase.Infrastructure.Data;

namespace ZeroBase.Infrastructure.DependencyResolution
{
    public class RepositoryModule : NinjectModule
    {
        public override void Load()
        {
            SetupLogging();
            BindRepositories();
        }

        private void SetupLogging()
        {
            // Get logging service
            var loggingService = Kernel.Get<ILoggingService>();

        }

        private void BindRepositories()
        {
            // Get config service
            var configService = Kernel.Get<IConfigService>();

            // Bind repositories
            Bind<IUserRepository>().To<UserRepository>()
                .WithConstructorArgument("connectionString",    configService.ZeroBaseConnection);
            Bind<ICommentRepository>().To<CommentRepository>()
                .WithConstructorArgument("connectionString",    configService.ZeroBaseConnection);
        }
    }
}

RepositoryBase.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ZeroBase.Domain.Interfaces;

namespace ZeroBase.Infrastructure.Data
{
    public class RepositoryBase<T> : IRepositoryBase<T>
    {
        protected SessionHelper _nhibernate;
        protected string _connectionString;

        public RepositoryBase(string connectionString)
        {
            _connectionString = connectionString;
            _nhibernate = new SessionHelper(_connectionString);
        }

        //....
    }
}

SessionHelper.cs 构建NHibernate会话并进行配置。请注意，正在注入connectionString。我可以在这里轻松注入日志服务。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NHibernate;
using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using ZeroBase.Infrastructure.Data;
using FluentNHibernate.Automapping;
using ZeroBase.Domain.Entities;
using ZeroBase.Infrastructure.Interfaces;

namespace ZeroBase.Infrastructure.Data
{
    public class SessionHelper
    {
        private ISessionFactory _sessionFactory;
        private string _connectionString;

        public SessionHelper(string connectionString)
        {
            _connectionString = connectionString;
        }

        private ISessionFactory SessionFactory
        {
            get
            {
                if (_sessionFactory == null)
                    InitializeSessionFactory();

                return _sessionFactory;
            }
        }

        private void InitializeSessionFactory()
        {
            _sessionFactory = Fluently.Configure()

                // Set up database connection
                .Database(MsSqlConfiguration.MsSql2005
                    .ConnectionString(x => x.Is(_connectionString))
                    //.ShowSql()
                )

                // Use class mappings
                .Mappings(m => m.FluentMappings
                    .AddFromAssemblyOf<UserMap>()
                    .AddFromAssemblyOf<ZeroBase.Infrastructure.Data.RACS3.UserMap>())

                .ExposeConfiguration(c => {
                        c.SetInterceptor(new AuditInterceptor());
                    }
                )

                .BuildSessionFactory();
        }

        public ISession OpenSession()
        {
            return SessionFactory.OpenSession();
        }
    }
}

LoggerFactory.cs 通过app.config配置NHibernate用于其日志记录。这是我遇到依赖问题的地方。这与NHibernate一起生活。我可以在这里轻松引用NLog并使用NHibernate连接它，但我不希望NHibernate关注我正在使用的日志框架。这就是为什么我只想处理我的界面并让Ninject注入我的具体实现。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NHibernate;
using ZeroBase.Infrastructure.Interfaces;

namespace ZeroBase.Infrastructure.Data
{
    public class LoggerFactory : ILoggerFactory
    {
        public IInternalLogger LoggerFor(Type type)
        {
            //ILoggingService logService;

            // Get resolved LoggingService

            //return new NLogLogger(LogManager.GetLogger(type.FullName));
            //return new Logger(logService.GetLogger(type.FullName));
            return null;
        }

        public IInternalLogger LoggerFor(string keyName)
        {
            //ILoggingService logService;

            // Get resolved LoggingService

            //return new NLogLogger(LogManager.GetLogger(keyName));
            //return new Logger(logService.GetLogger(keyName));
            return null;
        }
    }

    public class Logger : IInternalLogger
    {
        private readonly ILoggingService logger;

        public Logger(ILoggingService _logger)
        {
            logger = _logger;
        }

        //....
    }
}

Answer 1

通过Common.Logging与NHibernate一起使用NLog：

http://nhibernate.info/doc/howto/various/using-nlog-via-common-logging-with-nhibernate.html

Answer 2

为什么不能在LoggerFactory类中添加静态Kernal属性，并在初始化Kernal后立即在Program.Main中设置它？

然后在你的LoggerFor实现中，你只需要引用你的静态内核属性来获得正确绑定的实现。

洋葱建筑记录NHibernate

2 个答案: