如何在引导后注入会话/用户对象？ [英] How to inject Session/User object after bootstrapping?

问题描述

有些例子中，不同类型的对象被注入演示者，但我找不到解释如何做到这一点。

在< a href =http://dev.arcbees.com/gwtp/get-started/Bootstrap-Code.html =nofollow> Bootstrap-Code 例如他们正在注入例如一个 SecurityDelegate 对象。

同样在网守例如我看到注入的东西，例如 MyGatekeeper ，但这是怎么完成的？

我想要先检查用户是否登录，然后创建一个 CurrentSession 对象或类似的东西。但我怎样才能通过/注入这个对象？

目前我正在初始化一个单例对象 CurrentUser which是一种丑陋的imho。我希望获得GWTP支持，但如何？

---

以 CurrentSession 被注入关守：
$ b

@DefaultGatekeeper
public class LoggedInGatekeeper实现Gatekeeper {
private final CurrentSession currentSession;

@Inject
LoggedInGatekeeper（CurrentSession currentSession）{
this.currentSession = currentSession;


@Override
public boolean canReveal（）{
return currentSession.isLoggedIn（）;




$ b $ p $如何注入 CurrentSession 在这里？

解决方案

下面是一个教程，介绍如何使用Gatekeeper： http://dev.arcbees.com/gwtp/tutorials/tutorial-part2.html

在你的杜松子酒模块中声明CurrentSession的类（本教程中的CurrentUser）为Singleton，如下所示：

  public class YourGinModule extends AbstractGinModule {
 
 @Override 
 protected void configure（）{
 bind（CurrentSession.class）.in（Singleton.class）; 
 ... 
} 
 
} 
  

在这里你可以找到另一个例子，在客户端使用GWTP Gatekeeper，在服务器端使用Spring Security： https：// github.com/imrabti/gwtp-spring-security

There are examples where different kinds of objects are getting injected into a presenter, but I can't find an explanation how this can be done.

In the Bootstrap-Code example they are injecting e.g. a SecurityDelegate object.

Also in the Gatekeeper example I see things being injected, e.g. MyGatekeeper, but how is this done?

What I want is to first check if the user is logged in and then create a CurrentSession object or something like this. But how can I pass/inject this object around?

At the moment I am initializing a singleton object CurrentUser which is kind of ugly imho. I would like to get the GWTP support running, but how?

---

Take this example of the CurrentSession being injected into the gatekeeper:

@DefaultGatekeeper
public class LoggedInGatekeeper implements Gatekeeper {
    private final CurrentSession currentSession;

    @Inject
    LoggedInGatekeeper(CurrentSession currentSession) {
        this.currentSession = currentSession;
    }

    @Override
    public boolean canReveal() {
        return currentSession.isLoggedIn();
    }
}

How do I inject CurrentSession here?

解决方案

Here is a tutorial that explains how to use Gatekeeper : http://dev.arcbees.com/gwtp/tutorials/tutorial-part2.html

Declare CurrentSession's class ( CurrentUser in the tutorial ) as Singleton in your Gin's module like below :

public class YourGinModule extends AbstractGinModule {

    @Override
    protected void configure() {
        bind( CurrentSession.class ).in ( Singleton.class );
        ...
    }

}

Here you can find another example using GWTP Gatekeeper on client side and Spring Security on server side : https://github.com/imrabti/gwtp-spring-security

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