Spring AOP implementation I think is reusing some classes from the aspectj-weaver. It still uses dynamic proxies – doesn’t do byte code modification. The following comment from the spring forum might clarify. Spring isn’t using the AspectJ weaver in this case. It is simply reusing some of the classes from aspectjweaver.jar. -Ramnivas
Short Answer Don’t iterate through all the loaded classes from Instrumentation. Instead, just examine the class name passed in to the transformer and if it matches your target class, then transform it. Otherwise, simply return the passed classfileBuffer unmodified. Make the set up calls outside the transformer, (i.e. in your case, do the following from … Read more
Python supports AOP by letting you dynamically modify its classes at runtime (which in Python is typically called monkeypatching rather than AOP). Here are some of my AOP use cases: I have a website in which every page is generated by a Python function. I’d like to take a class and make all of the … Read more
Encountered this error while using maven-shade-plugin, the solution was including: META-INF/spring.schemas and META-INF/spring.handlers transformers in the maven-shade-plugin when building… <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <transformers> <transformer implementation=”org.apache.maven.plugins.shade.resource.AppendingTransformer”> <resource>META-INF/spring.handlers</resource> </transformer> <transformer implementation=”org.apache.maven.plugins.shade.resource.AppendingTransformer”> <resource>META-INF/spring.schemas</resource> </transformer> </transformers> </configuration> </execution> </executions> </plugin> (Credits: Idea to avoid that spring.handlers/spring.schemas get overwritten when merging multiple spring … Read more
The aspect is a singleton object and is created outside the Spring container. A solution with XML configuration is to use Spring’s factory method to retrieve the aspect. <bean id=”syncLoggingAspect” class=”uk.co.demo.SyncLoggingAspect” factory-method=”aspectOf” /> With this configuration the aspect will be treated as any other Spring bean and the autowiring will work as normal. You have … Read more
A few pointers: Debunking myths: proxies impact performance (have a look at the comments too) Java theory and practice: Decorating with dynamic proxies Benchmarking the cost of dynamic proxies
I understand your confusion and it took me some time to understand how these concepts were related together. So here is my (somehow personal) explanation of all this: 1. Inversion of Control Inversion of control is a design principle rather generic that refers to the decoupling of the specification of a behavior from when it … Read more
That’s what middleware is for: app.use(function(req, res, next) { if (!req.headers.authorization) { return res.status(403).json({ error: ‘No credentials sent!’ }); } next(); }); …all your protected routes… Make sure that the middleware is declared before the routes to which the middleware should apply.
I don’t think there is built in attribute for ajax, but you can create your own AjaxOnly filter like this: public class AjaxOnlyAttribute : ActionMethodSelectorAttribute { public override bool IsValidForRequest(ControllerContext controllerContext, System.Reflection.MethodInfo methodInfo) { return controllerContext.RequestContext.HttpContext.Request.IsAjaxRequest(); } } And decorate your action methods like this: [AjaxOnly] public ActionResult AjaxMethod() { } See Also: ASP.NET MVC … Read more
It looks like RealProxy won’t come to .NET Core/Standard. In the issue, a Microsoft developer suggests DispatchProxy as an alternative. Also, some existing AOP frameworks may support .NET Core already or in the future (as seen in the comments on the question). An alternative is the DispatchProxy, which has a wonderful example here: http://www.c-sharpcorner.com/article/aspect-oriented-programming-in-c-sharp-using-dispatchproxy/. If … Read more