Question

情况如下：

/// <summary>
/// A business logic class.
/// </summary>
public class BusinessClassWithInterceptor : BusinessClass, IBusinessClass
{
    /// <summary>
    /// Initializes a new instance of the <see cref="BusinessClassWithoutInterceptor"/> class.
    /// </summary>
    /// <param name="logger">The logger.</param>
    public BusinessClassWithInterceptor(Logger logger)
        : base(logger)
    {
    }

    /// <summary>
    /// Displays all cows.
    /// </summary>
    public void DisplayAllCows()
    {
        this.Logger.Write("Displaying all cows:");
        var repository = new CowRepository();
        foreach (CowEntity cow in repository.GetAllCows())
        {
            this.Logger.Write("    " + cow);
        }
    }

    /// <summary>
    /// Inserts a normande.
    /// </summary>
    public void InsertNormande(int id, string name)
    {
        this.DisplayAllCows();

        var repository = new CowRepository();
        repository.InsertCow(new CowEntity { Id = id, Name = name, Origin = CowOrigin.Normandie });
    }
}

使用城堡windsor，此类被配置为使用此拦截器拦截：

/// <summary>
/// Interceptor for logging business methods.
/// </summary>
public class BusinessLogInterceptor : IInterceptor
{
    /// <summary>
    /// Intercepts the specified invocation.
    /// </summary>
    /// <param name="invocation">The invocation.</param>
    public void Intercept(IInvocation invocation)
    {
        Logger logger = ((IBusinessClass)invocation.InvocationTarget).Logger;

        var parameters = new StringBuilder();
        ParameterInfo[] methodParameters = invocation.Method.GetParameters();
        for (int index = 0; index < methodParameters.Length; index++)
        {
            parameters.AppendFormat("{0} = {1}", methodParameters[index].Name, invocation.Arguments[index]);
            if (index < methodParameters.Length - 1)
            {
                parameters.Append(", ");
            }
        }

        logger.Format("Calling {0}( {1} )", invocation.Method.Name, parameters.ToString());
        invocation.Proceed();
        logger.Format("Exiting {0}", invocation.Method.Name);
    }
}

问题发生在调用 InsertNormande 期间。对 InsertNormande 的调用被很好地拦截了，但是插入了对InsertNormande中 DisplayAllCows 的调用......

真让我烦恼。

在这种情况下，有没有办法实现拦截？

Answer 1

我认为没有一种简单的方法可以实现...类内部的方法调用无法被截获，因为它们不通过代理。

您可以通过其他方式实现所有方法的记录，例如像PostSharp这样的AOP框架

从同一对象的方法调用的拦截方法

1 个答案: