我有以下GWT模块:
public class FizzModule implements EntryPoint {
private Buzz buzz;
public FizzModule() {
this(null);
}
public FizzModule(Buzz bz) {
super();
setBuzz(bz);
}
@Override
public void onModuleLoad() {
// ...etc.
}
}
我想"注射" FizzModule
个Buzz
个实例。但是,我在GWT模块中看到的所有代码示例都不使用构造函数。相反,他们从onModuleLoad()
方法内部引导DI机制(通常是ClientFactory或GIN)。这是GWT强制要求的东西,还是我可以在加载到客户端之前以某种方式注入我的模块?提前谢谢!
答案 0 :(得分:2)
GWT始终使用零参数构造函数实例化您的模块。
(从技术上讲,我认为它使用GWT.create()
因此您可以使用延迟绑定规则,但这不会改变任何内容。如何实例化
顺便说一下,Buzz
实例来自哪里?
答案 1 :(得分:0)
您可以向URL添加参数并使用PlaceController。然后在模块加载上获取这些值。
public void onModuleLoad() {
SimplePanel mainPanel = new SimplePanel();
EventBus eventBus = GWT.creat(EventBus.class);
// Start ActivityManager for the main widget with ActivityMapper
ActivityManager activityManager = new ActivityManager(injector.getActivityMapper(),
eventBus);
activityManager.setDisplay(mainPanel);
RootPanel.get().add(mainPanel);
// Start PlaceHistoryHandler with our PlaceHistoryMapper
AppPlaceHistoryMapper contentHistoryMapper = GWT.create(AppPlaceHistoryMapper.class);
PlaceHistoryHandler historyHandler = new PlaceHistoryHandler(contentHistoryMapper);
PlaceController placeController = new PlaceController(eventBus)
historyHandler.register(placeController, injector.getEventBus(), new MainPlace());
// Goes to the place represented on URL else default place
historyHandler.handleCurrentHistory();
if(placeController.getWhere() instanceof MainPlace) {
(MainPlace).getFoo();
}
}
public class MainPlace extends Place {
private String foo;
public MainPlace(String token) {
String foo = token;
}
@Override
public String getFoo() {
return foo;
}
public static class Tokenizer implements PlaceTokenizer<MainPlace> {
@Override
public MainPlace getPlace(String token) {
return new MainPlace(token);
}
@Override
public String getToken(MainPlace place) {
return place.getFoo();
}
}
}