Guice

问题 I have a class that handles Guice bindings. It is the very first thing that needs to run, called ApplicationAutoworkout.java. package com.redsoft.android.autoworkout; import java.util.List; import roboguice.application.RoboApplication; import com.google.inject.Module; import com.redsoft.android.autoworkout.service._ModuleQueryFor; import com.redsoft.android.autoworkout.service._ModuleService; import com.redsoft.android.autoworkout.ui._ModuleUi; public class ApplicationAutoworkout extends

问题 I'm using Jersey, and Guice as my IOC-container. I'd like to know if it is possible to associate an ExceptionMapper with a specific URI. The reason for this is that I want to map the same exception differently based on what URI was visited. For example, suppose I've got the following two exception mappers for my custom exception: public class MyExceptionMapperForFirstURI implements ExceptionMapper<MyException> {..return response based on first URI..} public class MyExceptionMapperForSecondURI

问题 Since ServletContextListener is created by the server, not by Guice I can't find a way to make it work together. How do I get guice injector at ServletContextListener? Maybe there is better way to shutdown services like logger or persistance then doing it at contextDestroyed method and initialize them at contextInitialized? 回答1: The extension GuiceServlet puts the injector in the servlet context, so you can get it by doing something like this: public class MyServletContextListener implements

问题 Google guice has a built-in logger binding. But what if I want to use a commons-logging or log4j logger? Can I get guice to inject a Log created by LogFactory.getLog(CLASS.class) But having the same behavior as in built-in binding: The binding automatically sets the logger's name to the name of the class into which the Logger is being injected.. Does it even makes sense? Or shout I simply use the built-in java Logger? Or just use commons-logging without injections? 回答1: The CustomInjections

问题 I believe this questions has been asked in some or the other way but i'm not getting it yet. We do a GWT project and my project leader disallowed to use GIN/Guice as an DI framework (new programmers are not going to understand it, he argued) so I try to do the DI manually. Now I have a problem with deep object graphs. The object hierarchy from the UI looks like this: AppPresenter->DashboardPresenter->GadgetPresenter->GadgetConfigPresenter The GadgetConfigPresenter way down the object

问题 I'd like to create a Module that dynamically binds instances to named annotations. The use case is I would like to automatically bind the values in my configuration with the key in the properties file being the @Named value. However the configuration is bound in a different module so I need the config to be injected. Solutions I've looked at are: Binding in the configure() method. This method is not injected into and I can not get the base configuration. Using a Provider/@Provides. Providers

问题 How to test implementations of Guice AbstractModule in a big project without creating fake implementations? Is it possible to test bind() and inject() methods? 回答1: Typically the best way to test Guice modules is to just create an injector in your test and ensure you can get instances of keys you care about out of it. To do this without causing production stuff to happen you may need to replace some modules with other modules. You can use Modules.override to selectively override individual

问题 For instance, RESTEasy's ResteasyWebTarget class has a method proxy(Class<T> clazz) , just like Injector's getInstance(Class<T> clazz) . Is there a way to tell Guice that creation of some classes should be delegated to some instance? My goal is the following behavior of Guice: when the injector is asked for a new instance of class A, try to instantiate it; if instantiation is impossible, ask another object (e. g. ResteasyWebTarget instance) to instantiate the class. I'd like to write a module

问题 Novice here trying to use a dummy Java Facebook app that uses Guice to inject a database dependency into the Facebook factory but continue to have Guice error out telling me: ### No implementation for com.example.storage.Db annotated with @com.example.storage.annotations.SystemDb() was bound while locating com.example.storage.Db annotated with @com.example.storage.annotations.SystemDb() for parameter 0 at com.example.facebook.client.exceptions.FacebookExceptionHandlerDb at com.example

问题 Using Guice, I want to inject a bounded-wildcard class. To be clear, I don't want to inject an object , but inject a class type . The would read: class A { Class<? extends SuperClass> a; @Inject A(Class<? extends SuperClass> a) { this.a = a.; } } How can I correctly bind the parameter? 回答1: Use this binding: bind(new TypeLiteral<Class<? extends SuperClass>>() {}) .toInstance(SubClass.class); 来源： https://stackoverflow.com/questions/8734826/using-guice-how-can-i-inject-a-bounded-wildcard-class