Question

我正在研究使用Unity的概念证明，我遇到了拦截器被调用的问题。我正在使用政策注入。

所以这里有一些代码

建立团结：

 private void ApplyCrossCuttingConcerns(UnityContainer container)
    {
        container.AddNewExtension<Interception>();

        container.RegisterType<IContact, Contact>(
            new InterceptionBehavior<PolicyInjectionBehavior>(),
            new Interceptor<InterfaceInterceptor>());
        container.Configure<Interception>()
            .AddPolicy("extensionPolicy")
            .AddMatchingRule<TypeMatchingRule>(new InjectionConstructor(typeof(Contact).ToString()))
            .AddMatchingRule<MethodSignatureMatchingRule>(new InjectionConstructor("Save",new [] {""},true))
            .AddCallHandler<ExtensionHandler>(new ContainerControlledLifetimeManager(), new InjectionConstructor());

    }

我从BussinessObject继承的联系类，其中有问题的方法存在

 public class Contact : BussinessObject, IContact
{...}

 public abstract class BussinessObject
{
    #region Local Vars
    protected readonly IRepository _repository;
    protected bool isNew;
    #endregion Local Vars

    #region Properties
    /// <summary>
    /// Gets or sets a value indicating whether this instance is new.
    /// </summary>
    /// <value>
    /// <see langword="true" /> if this instance is new; otherwise, <see langword="false" />.
    /// </value>
    internal bool IsNew { get { return (isNew); } set { isNew = value; } }
    #endregion

    #region Constructors

    /// <summary>
    /// Initializes a new instance of the <see cref="BussinessObject"/> class.
    /// </summary>
    /// <param name="repository">The repository.</param>
    public BussinessObject(IRepository repository)
    {
        if (repository.IsEmpty())
        {
            throw new Exception("The repository is a maditory parameter for a bussiness object");
        }
        _repository = repository;
    }

    #endregion Constructors

    #region Methods

    #region public

    /// <summary>
    /// Saves this instance.
    /// </summary>
    public virtual void Save()
    {
        Validate();
        SetIdenity();
        if (isNew)
        {
            Insert();
        }
        else
        {
            Update();
        }
        isNew = false;
    }

    /// <summary>
    /// Permantlies the remove from system.
    /// </summary>
    /// <param name="ID">The identifier.</param>
    public abstract void PermantlyRemoveFromSystem(Guid id);

    #endregion public

    #region Internal

    /// <summary>
    /// Sets the idenity.
    /// </summary>
    internal abstract void SetIdenity();

    #endregion Internal

    #region protected

    /// <summary>
    /// Commons the initialize.
    /// </summary>
    protected virtual void CommonInit()
    {
        isNew = false;
    }

    /// <summary>
    /// Inserts this instance.
    /// </summary>
    protected abstract void Insert();

    /// <summary>
    /// Updates this instance.
    /// </summary>
    protected abstract void Update();

    /// <summary>
    /// Validates this instance.
    /// </summary>
    protected abstract void Validate();

    #endregion protected

    #endregion
}

现在IContact

public interface IContact : DTO.IContact
{
    void Save();
    void Delete();

    #region Phone Number Manipulation

    bool SetDefaultNumber(PhoneNumber phNum);
    PhoneNumber GetDefaultNumber();
    bool HasDefaultNumber();
    PhoneNumber[] GetPhoneNumbers();
    PhoneNumber[] GetPhoneNumbers(bool includeDeleted);
    void AddPhoneNumber(PhoneNumber phToAdd);
    bool RemovePhoneNumber(PhoneNumber phToRemove);
    #endregion

    #region Email Address Manipulation

    bool SetDefaultEMailAddress(EmailAddress emAdd);
    bool HasDefaultEmailAddress();
    EmailAddress[] GetAllEmailAddresses();
    EmailAddress[] GetAllEmailAddresses(bool includeDeleted);
    EmailAddress AddEmailAddress(string addressToAdd);
    EmailAddress GetDefaultEMailAddress();

    #endregion

    #region Snailmail Address Manipulation

    bool SetDefaultAddress(SnailMailAddress ad);
    SnailMailAddress GetDefaultAddress();
    bool HasDefaultAddress();
    SnailMailAddress[] GetAllAddresses();
    SnailMailAddress[] GetAllAddresses(bool includeDeleted);
    void AddAddress(SnailMailAddress adToAdd);
    bool RemoveAddress(SnailMailAddress adToRemove);

    #endregion

}

最后是extensionHandler

 public class ExtensionHandler : ICallHandler
{
    public int Order { get; set; }

    public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
    {
        //going to do our work before we pass on to the next item in the pipeline
        SomeFunctionality handlerFunctionality = new SomeFunctionality();
        handlerFunctionality.PreformWork();

        //pass on to the next item in the pipeline
        var result = getNext().Invoke(input, getNext);


        //we can put post processing logic in here


        return result;
    }

我设置了一个测试来解析联系对象，然后在其上设置数据并调用save方法。我在ExtensionHandler的invoke方法的顶部有一个断点，但我从来没有到达那里。我认为我配置MethodSignatureMatchingRule的方式存在问题，但我还没有在网上找到文档，显示拦截的示例被配置为没有参数的方法。

任何帮助都会得到帮助

Answer 1

经过一些实验，我找到了答案此问题出现在匹配规则中这两个规则的正确代码都不正确如下：

private void ApplyCrossCuttingConcerns(UnityContainer container)
    {
        container.AddNewExtension<Interception>();

        container.RegisterType<IContact, Contact>(
            new InterceptionBehavior<PolicyInjectionBehavior>(),
            new Interceptor<InterfaceInterceptor>());
        container.Configure<Interception>()
            .AddPolicy("extensionPolicy")
            .AddMatchingRule<TypeMatchingRule>(new InjectionConstructor(new InjectionParameter(typeof(IContact))))
            .AddMatchingRule<MemberNameMatchingRule>(new InjectionConstructor(new InjectionParameter("Save")))
            .AddCallHandler<ExtensionHandler>(new ContainerControlledLifetimeManager(), new InjectionConstructor());

    }

将Unity拦截挂钩到没有参数的方法

1 个答案: