classloader

I have two namespaces, each with its own controller and presenter classes: Member::DocumentsController Member::DocumentPresenter Guest::DocumentsController Guest::DocumentPresenter Both presenters inherit from ::DocumentPresenter . Controllers access their respective presenters without namespace specified, e.g.: class Guest::DocumentsController < ActionController::Base def show DocumentPresenter.new(find_document) end end This usually calls presenter within same namespace. However sometimes in development environment I see base ::DocumentPresenter is being used. I suspect the cause is that

I want to load a JAR dynamically, straight for memory. Say, I have a buffer that contains a JAR, and I want to load all the classes inside the JAR, or at least list all of the files that exist inside the JAR. (classes, images, etc...). What do I do if the first class that I load depends on the second class, for example? Does java know how to handle this? Or I have take care of this by myself? Since you said “at least list all of the files that exist inside the JAR”, let’s begin with that rather easy task. Suppose, you have your JarFile in a byte array, byte[] buffer : try(JarInputStream is=new

I have encountered a very strange exception, and I don't know how to find the reason. Business background: Add goods and meantime it's price list, a goods have 5 price for diff level user. In controller, first convert goodForm to goods by using dozer, then call goodsService to save goods. In goodsService after saving goods, traversal goods price list and populate goodsId to goods price, GoodsForm: @Mapping("priceList") List<GoodsPriceForm> goodsPriceFormList; Goods: List<GoodsPrice> priceList; Controller: Goods goods = BeanMapper.map(goodsForm, Goods.class); goodsService.saveGoods(adminId,

I have spring application alongside (jersey 2.6 classes and ) servlets . I need to get Spring bean(s) from jersey/ non spring context, Similar question suggested to get context in a static wrapper of context public static ApplicationContext getContext() { return context; } How can I be sure the context is already loaded or not null? If I can't, how should I wait/check until it spring context is loaded? In case of calling from jersey context or calling bean from a simple HttpServlet code EDIT Jersey is working fine using jersey-spring3 dependency jar, so my question is only about Servlets out

Hello Stack Overflow friends. I have a simple problem which i fear doesnt have a simple solution and i need advice as to how to proceed. I am developing a java application packaged as and executable JAR but it requires to modify some of its JAR file contents during execution. At this stage i hit a problem because some OS lock the file preventing writes to it. It is essential that the user sees an updated version of the jar file by the time the application exits allthough i can be pretty flexible as to how to achieve this. A clean and efficient solution is obviously prefereable but portability