在Web容器外的Java 6中使用Guice 3和JAX-WS [英] Using Guice 3 with JAX-WS in Java 6 outside web container

问题描述

我们有一种情况，我们使用基于JSR-330的注入来配置我们的独立Java 6应用程序，这非常适合在所有层中获取配置参数。

We have a situation where we use JSR-330 based injections to configure our stand-alone Java 6 applications, which works very well for getting configuration parameters across all the layers.

我们还使用JAX-WS Web服务已经有一段时间了，在Web容器中使用Java 5的第一个独立Metro分发，但是使用Java 6我们只使用Endpoint类来减少占用空间。

We have also used JAX-WS web services for quite a while by using first stand-alone Metro distribution with Java 5 inside a web container, but with Java 6 we just use the Endpoint class to get a smaller footprint.

所以现在我遇到了这样的情况

So now I have a situation where I have

• 一个独立的Java 6应用程序 - 没有servlet容器（Jetty，Tomcat）


• 一个Guice 3 Injector设置我喜欢它。


• 一个端点处理我的 @javax.jws.WebService 带注释的类，它将我的方法公开为Web服务。

• A stand-alone Java 6 application - no servlet container (Jetty, Tomcat)
• A Guice 3 Injector set up as I like it.
• An Endpoint handling my @javax.jws.WebService annotated class which expose my methods as web services.

我希望Web服务方法能够透明地处理@Inject字段，或者访问注入器。我可以从主方法中将其作为静态字段抓取，但我想要一个更清洁的解决方案。

I would like the web service methods to either have their @Inject fields handled transparently, or to get access to the injector. I can grab it as a static field from the main method, but I'd like a cleaner solution.

有什么建议吗？

（我从 JAX-WS了解到这一点和Guice 3 即 http://jax-ws-commons.java。 net / guice / 模块不适用于Guice 3，建议的解决方法是特定于Tomcat）

(I understand from JAX-WS and Guice 3 that the http://jax-ws-commons.java.net/guice/ module does not work with Guice 3, and the workaround suggested is Tomcat specific)

JSR-250 @资源注释在这里有用吗？

Would JSR-250 @Resource annotations be useful here?

推荐答案

我不确定我是否理解过每一点这个问题。它看起来太容易了+500赏金。如果这不是您要搜索的内容，请发布一些代码。

I'm not sure that I've understood every bit of the question. It looks to too easy for +500 bounty. Please post some code if that's not what you're searching for.

无论如何，这是一个创建带依赖注入的Web服务的简单解决方案：

Anyway, a simple solution which creates a web service with dependency injection:

final Module module = new HelloModule();
final Injector injector = Guice.createInjector(module);
final HelloService helloService = injector.getInstance(HelloService.class);

Endpoint.publish("http://localhost:8080/helloService", helloService);

下面是一个更复杂的类路径扫描解决方案（思考）基于Marcus Eriksson的代码 JAX-WS Guice集成。它使用 Endpoint.publish（）发布所有使用 @GuiceManaged 注释的类作为Web服务。

Below a more sophisticated solution with classpath scanning (Reflections) based on Marcus Eriksson's code from JAX-WS Guice integration. It publishes all classes which is annotated with @GuiceManaged as a webservice with Endpoint.publish().

private void initGuicedWebservices(final String packageNamePrefix) 
        throws Exception {
    final Reflections reflections = new Reflections(packageNamePrefix);
    final Set<Class<?>> guiceManaged = 
        reflections.getTypesAnnotatedWith(GuiceManaged.class);
    for (final Class<?> clazz : guiceManaged) {
        doGuice(clazz);
    }
}

private void doGuice(final Class<?> clazz) throws Exception {
    final GuiceManaged guiceManagedAnnotation = 
        clazz.getAnnotation(GuiceManaged.class);

    final Injector injector = createInjector(guiceManagedAnnotation);

    final Object serviceObject = clazz.newInstance();
    injector.injectMembers(serviceObject);

    final String address = guiceManagedAnnotation.address();

    Endpoint.publish(address, serviceObject);
}

private Injector createInjector(final GuiceManaged guiceManagedAnnotation) 
        throws Exception {
    final Class<? extends Module>[] moduleClasses = 
        guiceManagedAnnotation.module();

    final List<Module> moduleInstances = new ArrayList<Module>();
    for (final Class<? extends Module> moduleClass : moduleClasses) {
        moduleInstances.add(moduleClass.newInstance());
    }

    return Guice.createInjector(moduleInstances);
}

GuiceManaged 注释：

@Retention(RUNTIME)
@Target(TYPE)
@Documented
public @interface GuiceManaged {
    public Class<? extends Module>[] module();
    public String address();
}

HelloServiceImpl snippet：

@GuiceManaged(module = HelloModule.class, 
    address = "http://localhost:8080/helloService")
@WebService
public class HelloServiceImpl implements HelloService {

    @Inject // bound in HelloModule
    public GreetingsService greetingsService;

    @Override
    @WebMethod
    public String sayHello(final String name) {
        return greetingsService.sayHello(name);
    }
}

这篇关于在Web容器外的Java 6中使用Guice 3和JAX-WS的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！