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Unity 处理IOC AOP
用Unity 可以做IOC(控制反转) AOP（切面）可以做统一的异常和日志处理，非常方便，项目中是用微软企业库中的Microsoft.Practices.Unity实现
1 定义接口与实现
//定义接口 public interface IProductService { string GetProduct(); } //实现接口 public class ProductService:IProductService { public string GetProduct() { int i = 0; int j = 1; //抛异常 return (j / i).ToString(); } }
2 实现依赖反转
public sealed class ServiceLocator : IServiceProvider { #region Private Fields private readonly IUnityContainer container; #endregion #region Private Static Fields private static readonly ServiceLocator instance = new ServiceLocator(); #endregion #region Ctor /// <summary> /// Initializes a new instance of <c>ServiceLocator</c> class. /// </summary> private ServiceLocator() { UnityConfigurationSection section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity"); container = new UnityContainer(); section.Configure(container); } #endregion #region Public Static Properties /// <summary> /// Gets the singleton instance of the <c>ServiceLocator</c> class. /// </summary> public static ServiceLocator Instance { get { return instance; } } #endregion #region Private Methods private IEnumerable<ParameterOverride> GetParameterOverrides(object overridedArguments) { List<ParameterOverride> overrides = new List<ParameterOverride>(); Type argumentsType = overridedArguments.GetType(); argumentsType.GetProperties(BindingFlags.Public | BindingFlags.Instance) .ToList() .ForEach(property => { var propertyValue = http://www.mamicode.com/property.GetValue(overridedArguments, null); var propertyName = property.Name; overrides.Add(new ParameterOverride(propertyName, propertyValue)); }); return overrides; } #endregion #region Public Methods /// <summary> /// Gets the service instance with the given type. /// </summary> /// <typeparam name="T">The type of the service.</typeparam> /// <returns>The service instance.</returns> public T GetService<T>() { return container.Resolve<T>(); } /// <summary> /// Gets the service instance with the given type by using the overrided arguments. /// </summary> /// <typeparam name="T">The type of the service.</typeparam> /// <param name="overridedArguments">The overrided arguments.</param> /// <returns>The service instance.</returns> public T GetService<T>(object overridedArguments) { var overrides = GetParameterOverrides(overridedArguments); return container.Resolve<T>(overrides.ToArray()); } /// <summary> /// Gets the service instance with the given type by using the overrided arguments. /// </summary> /// <param name="serviceType">The type of the service.</param> /// <param name="overridedArguments">The overrided arguments.</param> /// <returns>The service instance.</returns> public object GetService(Type serviceType, object overridedArguments) { var overrides = GetParameterOverrides(overridedArguments); return container.Resolve(serviceType, overrides.ToArray()); } #endregion #region IServiceProvider Members /// <summary> /// Gets the service instance with the given type. /// </summary> /// <param name="serviceType">The type of the service.</param> /// <returns>The service instance.</returns> public object GetService(Type serviceType) { return container.Resolve(serviceType); } #endregion }
3 异常拦截类
public class ExceptionLoggingBehavior: IInterceptionBehavior { public IEnumerable<Type> GetRequiredInterfaces() { return Type.EmptyTypes; } public IMethodReturn Invoke(IMethodInvocation input, GetNextInterceptionBehaviorDelegate getNext) { var methodReturn = getNext().Invoke(input, getNext); if (methodReturn.Exception != null) { Console.WriteLine("拦截到异常 " + methodReturn.Exception.Message); } return methodReturn; } public bool WillExecute { get { return true; } } }
4 App.config 配置
<?xml version="1.0" encoding="utf-8" ?><configuration> <configSections> <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration"/> </configSections> <startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" /> </startup> <!--BEGIN: Unity--> <unity xmlns="http://schemas.microsoft.com/practices/2010/unity"> <sectionExtension type="Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension, Microsoft.Practices.Unity.Interception.Configuration"/> <container> <extension type="Interception"/> <!--Cache Provider--> <register type="UnityAOP.IProductService, UnityAOP" mapTo="UnityAOP.ProductService, UnityAOP"> <interceptor type="InterfaceInterceptor"/> <!--<interceptionBehavior type="UnityAOP.CachingBehavior, UnityAOP"/>--> <interceptionBehavior type="UnityAOP.ExceptionLoggingBehavior, UnityAOP"/> </register> </container> </unity> <!--END: Unity--></configuration>
5 调用
static void Main(string[] args) { IProductService service = ServiceLocator.Instance.GetService<IProductService>(); try { service.GetProduct(); } catch (Exception ex) { } Console.Read(); }
简单的例子
代码：http://files.cnblogs.com/files/zery/UnityAOP.rar
Unity 处理IOC AOP
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