Guice

问题 I am writing an application which handles multiple systems. The user can choose the system which he wants to work with and I store that system ID in session (client session) Now I have Service classes, lets say CustomerService. class CustomerService(val systemID: String) { // Implementation } I want to use Guice to inject the Customer instance to the Controllers. But I want to instantiate the CustomerService with SystemID which is stored in the session. How can I access request.session in

问题 I am writing an application which handles multiple systems. The user can choose the system which he wants to work with and I store that system ID in session (client session) Now I have Service classes, lets say CustomerService. class CustomerService(val systemID: String) { // Implementation } I want to use Guice to inject the Customer instance to the Controllers. But I want to instantiate the CustomerService with SystemID which is stored in the session. How can I access request.session in

问题 Maybe i missed it in the documentation but i'm wondering how i should handle "helper Objects"? code example: public Path dijkstra(Node startNode, Node endNode) { Set<Node> nodesToInspect = new HashSet<Node>(); // should this Object be injected? Path path = new Path(); // and this one? while (!nodesToInspect.isEmpty()) { // some logic like: path.add(currentNode); } return path; } Should i inject everything or should i say at some point that the algorithm "knows" best what it needs? Should i

问题 I have such a dirty code in my GWT app, some of the classes of my service layer depend on an HttpSession object. So for example, in one of my DAO (which was a GWT-RPC endpoint) I have something like this : public class MyExampleDAO extends RemoteServiceServlet { public findItems() { // here I need to get the object session to retrieve the currently logged in user in order to query for all its items... } } The problem is that, I am currently migrating the code to use RequestFactory. My DAO

问题 My application is throwing: java.lang.RuntimeException: Deferred binding failed for 'com.mygwtapp.client.gin.ClientAppGinjector' (did you forget to inherit a required module?) on this code inside the EntryPoint: private final ClientAppGinjector injector = GWT.create(ClientAppGinjector.class); What could be the problem? Here's the full error Log: java.lang.RuntimeException: Deferred binding failed for 'com.mygwtapp.client.gin.ClientAppGinjector' (did you forget to inherit a required module?)

问题 With Google Guice or Gin I can specify parameter with are not controlled by the dependency injection framework: class SomeEditor { @Inject public SomeEditor(SomeClassA a, @Assisted("stage") SomeClassB b) { } } The assisted parameter stage is specified at the time an instance of SomeEditor is created. The instance of SomeClassA is taken from the object graph and the instance of SomeClassB is taken from the caller at runtime. Is there a similar way of doing this in Dagger? 回答1: Because

问题 With Google Guice or Gin I can specify parameter with are not controlled by the dependency injection framework: class SomeEditor { @Inject public SomeEditor(SomeClassA a, @Assisted("stage") SomeClassB b) { } } The assisted parameter stage is specified at the time an instance of SomeEditor is created. The instance of SomeClassA is taken from the object graph and the instance of SomeClassB is taken from the caller at runtime. Is there a similar way of doing this in Dagger? 回答1: Because

问题 Is it possible to tell Guice to call some method (i.e. init()) after instantinating an object of given type? I look for functionality similar to @PostConstruct annotation in EJB 3. 回答1: Actually, it is possible. You need to define a TypeListener to get the functionality going. Something along the lines of the following in your module definition: bindListener(Matchers.subclassesOf(MyInitClass.class), new TypeListener() { @Override public <I> void hear(final TypeLiteral<I> typeLiteral,

问题 I have an interface: InterfaceA . I have a class: ConcreteA . I also have two annotations: @AnnotA and @AnnotB . I have done the following bindings: bind(InterfaceA).annotatedWith(AnnotA).to(ConcreteA); bind(InterfaceA).annotatedWith(AnnotB).to(ConcreteA); Next, class ConcreteA has a constructor that takes a String argument called hostName . class ConcreteA { @Inject public ConcreteA(@Named("hostName") hostName) { } ... <rest of class> } I need code to describe the following: If ConcretaA is

问题 I have a strange behavior with caching and JPA Entities (EclipseLink 2.4.1 ) + GUICE PERSIST I will not use caching, nevertheless I get randomly an old instance that has already changed in MySQL database. I have tried the following: Add @ Cacheable (false) to the JPA Entity. Disable Cache properties in the persistence.xml file : <class>MyEntity</class> <shared-cache-mode>NONE</shared-cache-mode> <properties> <property name="eclipselink.cache.shared.default" value="false"/> <property name=