dynamic-proxy

AOP for C# dotnet core 2.0, access method parameter values before method body runs

╄→гoц情女王★ 提交于 2019-12-09 22:38:26
问题 This is my method, I am trying to validate componentToSave (or access method parameter values) and throw an exception before method body even runs. public Component SaveComponent(Component componentToSave) { ... } I tried using PostSharp but it is not free and also there were other libraries that rely on AutoFac as IoC but in my current setup I am using dotnet core's built-in dependency injection. I tried NConcern and it relies on CNeptune and CNeptune itself relies on a .exe file for post

Detailed ServiceDescription / Proxy from WSDL

若如初见. 提交于 2019-12-06 15:59:33
I am using the classes ServiceDescription / ServiceDescriptionImporter to dynamically call web services. I'd like to dig a bit deeper into the WSDL description and get 1) Parameter info for each of the web methods 2) The actual types / composition each parameters of all the web methods (ie if a WebMethod takes some complex type as a parameter, I need to know the primitive / other types it is composed of as well, if possible) Here is the code I have for the dynamical call: public static object CallWebService(string webServiceAsmx, string serviceName, string methodName, object[] args = null) {

Intercept only interface methods with DynamicProxy

眉间皱痕 提交于 2019-12-06 12:39:13
问题 I got an interface like this public interface IService { void InterceptedMethod(); } A class that implements that interface and also has another method public class Service : IService { public virtual void InterceptedMethod() { Console.WriteLine("InterceptedMethod"); } public virtual void SomeMethod() { Console.WriteLine("SomeMethod"); } } And an Interceptor public class MyInterceptor : IInterceptor { public void Intercept(IInvocation invocation) { Console.WriteLine("Intercepting");

Why don't I experience any exception when I lookup bean wrapped by JDK dynamic proxy by class(instead of interface)?

廉价感情. 提交于 2019-12-06 06:03:06
Lets consider following bean: @Service @Scope(value = "prototype", proxyMode = ScopedProxyMode.INTERFACES) public class MyBeanB implements MyBeanBInterface { private static final AtomicLong COUNTER = new AtomicLong(0); private Long index; public MyBeanB() { index = COUNTER.getAndIncrement(); System.out.println("constructor invocation:" + index); } @Transactional @Override public long getCounter() { return index; } } and consider 2 different usages: USAGE 1: @Service public class MyBeanA { @Autowired private MyBeanB myBeanB; .... } At this case application can't be started and prints: *********

How to intercept a call to a nonvirtual method from/to thirdy-party libraries in .Net?

浪子不回头ぞ 提交于 2019-12-06 05:19:42
问题 I think what I need is something the .net folks call "transparent dynamic proxy", but all the implementations I've seen this far (Castle DynamicProxy, Spring.NET AOP, etc) require me to do at least one of these: Declare intercepted method as virtual Wrap class and create instances of the wrapper instead of wrapped class Change inheritance or implement interfaces Obviously, if both caller and callee are nonvirtual and from thirdy-party closed source libraries, which is the case, there is

Intercept Properties With Castle Windsor IInterceptor

爷,独闯天下 提交于 2019-12-05 20:40:58
Does anyone have a suggestion on a better way to intercept a properties with Castle DynamicProxy? Specifically, I need the PropertyInfo that I'm intercepting, but it's not directly on the IInvocation, so what I do is: public static PropertyInfo GetProperty(this MethodInfo method) { bool takesArg = method.GetParameters().Length == 1; bool hasReturn = method.ReturnType != typeof(void); if (takesArg == hasReturn) return null; if (takesArg) { return method.DeclaringType.GetProperties() .Where(prop => prop.GetSetMethod() == method).FirstOrDefault(); } else { return method.DeclaringType

聊聊resilience4j的fallback

℡╲_俬逩灬. 提交于 2019-12-05 18:58:11
序 本文主要研究一下resilience4j的fallback 使用实例 @Test public void testFallback(){ // Execute the decorated supplier and recover from any exception String result = Try.ofSupplier(() -> backendService.doSomethingThrowException()) .recover(throwable -> "Hello from Recovery").get(); System.out.println(result); } Try vavr-0.9.2-sources.jar!/io/vavr/control/Try.java /** * The Try control gives us the ability write safe code without focusing on try-catch blocks in the presence of exceptions. * <p> * The following exceptions are considered to be fatal/non-recoverable: * <ul> * <li>{@linkplain

Is there a way to create a DynamicObject that supports an Interface?

谁都会走 提交于 2019-12-05 14:27:32
问题 Can I define a class which derives from DynamicObject and supports an interface (ICanDoManyThings) without having to implement each method in the interface? I'm trying to make a dynamic proxy object, and want the method invocations on this class to be handled by the implementation of MyProxyClass.TryInvokeMember, which may or may not pass them on to a wrapped object. Is this possible? Thanks 回答1: ImpromptuInterface does exactly this and it works with ANY IDynamicMetaObjectProvider including

Intercept only interface methods with DynamicProxy

一笑奈何 提交于 2019-12-04 19:13:20
I got an interface like this public interface IService { void InterceptedMethod(); } A class that implements that interface and also has another method public class Service : IService { public virtual void InterceptedMethod() { Console.WriteLine("InterceptedMethod"); } public virtual void SomeMethod() { Console.WriteLine("SomeMethod"); } } And an Interceptor public class MyInterceptor : IInterceptor { public void Intercept(IInvocation invocation) { Console.WriteLine("Intercepting"); invocation.Proceed(); } } I want to intercept only the methods on Service that exists on IService (i.e I want to

Dynamic proxy and checked exceptions

泄露秘密 提交于 2019-12-04 18:25:02
问题 How can I make my dynamic proxy throw checked exceptions? I need a transparent wrapper for an interface which sometimes throws checked exceptions such as IOException . Is it possible without 3rd party AOP or writing my own proxy? Modifying all 20 methods of the interface by hand is not an option either. 回答1: You can use a dynamic proxy. As long as the checked exceptions are part of the interface you can throw the checked exceptions from the invocation handler. Otherwise this is illegal and