| | | 1 | | namespace NexusLabs.Needlr; |
| | | 2 | | |
| | | 3 | | /// <summary> |
| | | 4 | | /// Applies an interceptor to a class or method. When discovered by Needlr's |
| | | 5 | | /// source generator, a proxy class is generated that routes method calls |
| | | 6 | | /// through the specified interceptor(s). |
| | | 7 | | /// </summary> |
| | | 8 | | /// <remarks> |
| | | 9 | | /// <para> |
| | | 10 | | /// This attribute can be applied at the class level (intercepts all methods) |
| | | 11 | | /// or at the method level (intercepts only that method). |
| | | 12 | | /// </para> |
| | | 13 | | /// <para> |
| | | 14 | | /// The interceptor type must implement <see cref="IMethodInterceptor"/> and |
| | | 15 | | /// will be resolved from the DI container, allowing it to have dependencies. |
| | | 16 | | /// </para> |
| | | 17 | | /// <para> |
| | | 18 | | /// When multiple interceptors are applied, use the <see cref="Order"/> property |
| | | 19 | | /// to control execution order. Lower values execute first (outermost in the chain). |
| | | 20 | | /// </para> |
| | | 21 | | /// <para> |
| | | 22 | | /// <strong>Note:</strong> Interceptors are only supported with source generation. |
| | | 23 | | /// They are not available when using reflection-based registration. |
| | | 24 | | /// </para> |
| | | 25 | | /// </remarks> |
| | | 26 | | /// <example> |
| | | 27 | | /// <code> |
| | | 28 | | /// // Class-level interception (all methods) |
| | | 29 | | /// [Intercept(typeof(LoggingInterceptor))] |
| | | 30 | | /// [Scoped] |
| | | 31 | | /// public class OrderService : IOrderService |
| | | 32 | | /// { |
| | | 33 | | /// public Task<Order> GetOrderAsync(int id) => ...; |
| | | 34 | | /// public Task CreateOrderAsync(Order order) => ...; |
| | | 35 | | /// } |
| | | 36 | | /// |
| | | 37 | | /// // Method-level interception |
| | | 38 | | /// [Scoped] |
| | | 39 | | /// public class ProductService : IProductService |
| | | 40 | | /// { |
| | | 41 | | /// [Intercept(typeof(CachingInterceptor))] |
| | | 42 | | /// public Task<Product> GetProductAsync(int id) => ...; |
| | | 43 | | /// |
| | | 44 | | /// // This method is NOT intercepted |
| | | 45 | | /// public Task UpdateProductAsync(Product product) => ...; |
| | | 46 | | /// } |
| | | 47 | | /// |
| | | 48 | | /// // Multiple interceptors with ordering |
| | | 49 | | /// [Intercept(typeof(LoggingInterceptor), Order = 1)] |
| | | 50 | | /// [Intercept(typeof(TimingInterceptor), Order = 2)] |
| | | 51 | | /// [Scoped] |
| | | 52 | | /// public class ReportService : IReportService { } |
| | | 53 | | /// </code> |
| | | 54 | | /// </example> |
| | | 55 | | [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = false, AllowMultiple = true)] |
| | | 56 | | public sealed class InterceptAttribute : Attribute |
| | | 57 | | { |
| | | 58 | | /// <summary> |
| | | 59 | | /// Initializes a new instance of the <see cref="InterceptAttribute"/> class. |
| | | 60 | | /// </summary> |
| | | 61 | | /// <param name="interceptorType"> |
| | | 62 | | /// The type of the interceptor. Must implement <see cref="IMethodInterceptor"/>. |
| | | 63 | | /// </param> |
| | | 64 | | /// <exception cref="ArgumentNullException"> |
| | | 65 | | /// Thrown when <paramref name="interceptorType"/> is null. |
| | | 66 | | /// </exception> |
| | 5 | 67 | | public InterceptAttribute(Type interceptorType) |
| | | 68 | | { |
| | 5 | 69 | | InterceptorType = interceptorType ?? throw new ArgumentNullException(nameof(interceptorType)); |
| | 4 | 70 | | } |
| | | 71 | | |
| | | 72 | | /// <summary> |
| | | 73 | | /// Gets the type of the interceptor to apply. |
| | | 74 | | /// </summary> |
| | 1 | 75 | | public Type InterceptorType { get; } |
| | | 76 | | |
| | | 77 | | /// <summary> |
| | | 78 | | /// Gets or sets the order in which this interceptor executes relative to |
| | | 79 | | /// other interceptors on the same target. Lower values execute first |
| | | 80 | | /// (outermost in the interceptor chain). Default is 0. |
| | | 81 | | /// </summary> |
| | | 82 | | /// <remarks> |
| | | 83 | | /// <para> |
| | | 84 | | /// Example with Order values: |
| | | 85 | | /// <list type="bullet"> |
| | | 86 | | /// <item>Order = 1: LoggingInterceptor (executes first, wraps everything)</item> |
| | | 87 | | /// <item>Order = 2: CachingInterceptor (executes second)</item> |
| | | 88 | | /// <item>Order = 3: ValidationInterceptor (executes last, closest to actual method)</item> |
| | | 89 | | /// </list> |
| | | 90 | | /// </para> |
| | | 91 | | /// </remarks> |
| | 3 | 92 | | public int Order { get; set; } = 0; |
| | | 93 | | } |
| | | 94 | | |
| | | 95 | | /// <summary> |
| | | 96 | | /// Applies an interceptor to a class or method. Generic version that provides |
| | | 97 | | /// compile-time type safety for the interceptor type. |
| | | 98 | | /// </summary> |
| | | 99 | | /// <typeparam name="TInterceptor"> |
| | | 100 | | /// The type of the interceptor. Must implement <see cref="IMethodInterceptor"/>. |
| | | 101 | | /// </typeparam> |
| | | 102 | | /// <remarks> |
| | | 103 | | /// <para> |
| | | 104 | | /// This is the preferred form when the interceptor type is known at compile time. |
| | | 105 | | /// For dynamic scenarios, use the non-generic <see cref="InterceptAttribute"/>. |
| | | 106 | | /// </para> |
| | | 107 | | /// <para> |
| | | 108 | | /// See <see cref="InterceptAttribute"/> for full documentation and examples. |
| | | 109 | | /// </para> |
| | | 110 | | /// </remarks> |
| | | 111 | | /// <example> |
| | | 112 | | /// <code> |
| | | 113 | | /// [Intercept<LoggingInterceptor>(Order = 1)] |
| | | 114 | | /// [Intercept<CachingInterceptor>(Order = 2)] |
| | | 115 | | /// [Scoped] |
| | | 116 | | /// public class OrderService : IOrderService |
| | | 117 | | /// { |
| | | 118 | | /// public Task<Order> GetOrderAsync(int id) => ...; |
| | | 119 | | /// } |
| | | 120 | | /// </code> |
| | | 121 | | /// </example> |
| | | 122 | | [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = false, AllowMultiple = true)] |
| | | 123 | | public sealed class InterceptAttribute<TInterceptor> : Attribute |
| | | 124 | | where TInterceptor : class, IMethodInterceptor |
| | | 125 | | { |
| | | 126 | | /// <summary> |
| | | 127 | | /// Gets the type of the interceptor to apply. |
| | | 128 | | /// </summary> |
| | | 129 | | public Type InterceptorType => typeof(TInterceptor); |
| | | 130 | | |
| | | 131 | | /// <summary> |
| | | 132 | | /// Gets or sets the order in which this interceptor executes relative to |
| | | 133 | | /// other interceptors on the same target. Lower values execute first |
| | | 134 | | /// (outermost in the interceptor chain). Default is 0. |
| | | 135 | | /// </summary> |
| | | 136 | | public int Order { get; set; } = 0; |
| | | 137 | | } |