温莎城堡 - 多种实现一个接口 [英] Castle Windsor - multiple implementation of an interface

问题描述

而在温莎城堡注册组件，我们怎么绑定具体实现的接口到具有该接口上的依赖关系的组件。我提前知道哪个实现需要由组件使用。

While registering components in Castle Windsor, how do we bind specific implementation of an interface to a component that has a dependency on that interface. I know in advance which implementation needs to be used by the component.

例如我创建的基础上，从多个博客和教程代码示例控制台应用程序。

For example i created a sample console application based on code from several blogs and tutorials.

以下是代码。

public interface IReport
{
    void LogReport();
}

public interface ILogger
{
    string Log();
}

public class FileLogger : ILogger
{
    public string Log()
    {
        return "Logged data to a file";
    }
}

public class DatabaseLogger : ILogger
{
    public string Log()
    {
        return "Logged data to a database";
    }
}

public class McAfeeService : IReport
{
    private readonly ILogger _logger;

    public McAfeeService(ILogger logger)
    {
        this._logger = logger;
    }

    public void LogReport()
    {
        string getLogResult = this._logger.Log();

        Console.WriteLine("McAfee Scan has " + getLogResult);
    }        
}

public class NortonService : IReport
{
    private readonly ILogger _logger;

    public NortonService(ILogger logger)
    {
        this._logger = logger;
    }

    public void LogReport()
    {
        string getLogResult = this._logger.Log();

        Console.WriteLine("Norton Scan has " + getLogResult);
    }
}

class Program
{
    private static IWindsorContainer container;

    static void Main(string[] args)
    {
        // Register components
        container = new WindsorContainer();

        container.Register(Component.For<IReport>().ImplementedBy<NortonService>());
        container.Register(Component.For<ILogger>().ImplementedBy<FileLogger>());

        IReport service = container.Resolve<IReport>();
        service.LogReport();

        Console.ReadLine();
    }
}

我想NortonService始终使用Filelogger和McAfeeService使用一个数据库记录器。

I would like NortonService to always use a Filelogger and McAfeeService to use a Database Logger.

在上面的程序我无法NortonService绑定到FileLogger。

In the above program i am unable to bind NortonService to FileLogger.

如何？做

推荐答案

上面的回答使我内联依赖和功能的服务覆盖

The above answers lead me to inline dependencies and the feature service override

下面是注册码

container.Register(Component.For<IReport>().ImplementedBy<NortonService>().Named("nortonService"));

container.Register(Component.For<ILogger>().ImplementedBy<FileLogger>());
container.Register(Component.For<ILogger>().ImplementedBy<DatabaseLogger>());

container.Register(
    Component.For<IReport>().ImplementedBy<McAfeeService>().Named("mcafeeService")
        .DependsOn(Dependency.OnComponent<ILogger, DatabaseLogger>())
);

IReport mcafeescan = container.Resolve<IReport>("mcafeeService");
mcafeescan.LogReport();

IReport nortonscan = container.Resolve<IReport>("nortonService");
nortonscan.LogReport();

输出：

Output:

迈克菲扫描已登录数据到数据库
诺顿扫描已记录的数据到一个文件

McAfee Scan has Logged data to a database Norton Scan has Logged data to a file

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