如何从JAX-WS Web服务中访问ApplicationContext？ [英] How can I access the ApplicationContext from within a JAX-WS web service?

问题描述

与类似我可以从JAX-WS Web服务中访问ServletContext吗？，有没有办法访问applicationContext，比这更容易？

Similar to How can I access the ServletContext from within a JAX-WS web service?, is there a way to access applicationContext, easier than this?

import javax.annotation.Resource;
import javax.jws.WebService;
import javax.servlet.ServletContext;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.handler.MessageContext;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

@WebService
public class MyWebService {
    // boilerplate code begins :(

    @Resource
    private WebServiceContext context;
    private WebApplicationContext webApplicationContext = null;

    /**
     * @return
     * @throws IllegalStateException
     */
    private WebApplicationContext getWebApplicationContext()
            throws IllegalStateException {
        if (webApplicationContext != null)
            return webApplicationContext;
        ServletContext servletContext =
                (ServletContext) context.getMessageContext().get(
                        MessageContext.SERVLET_CONTEXT);
        webApplicationContext =
                WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);
        return webApplicationContext;
    }
}

推荐答案

我不认为Web服务应该必须了解Web或servlet上下文或其应用程序上下文。我不明白为什么它应该知道这些。它不应该更被动吗？注入它需要的东西并让它完成它的工作。与客户的服务交互应基于预先定义的合同。如果它必须从某种类型的上下文中获取未知值，客户将如何知道需要设置什么或如何设置它？

I don't think that the web service should have to know about web or servlet contexts or its application context. I don't see why it should have to know any of that. Shouldn't it be far more passive? Inject what it needs and let it do its work. The service interactions with a client should be based on a contract defined up front. If it has to get unknown values from a context of some kind, how will clients know what needs to be set or how to set it?

我会更进一步说一个Web服务应该是Spring服务接口的包装器。它是揭露它的所有可能方式中的又一个选择。您的Web服务应该只执行编组和解组XML请求/响应对象并与Spring服务协作。

I'd go further and say that a web service should be a wrapper for a Spring service interface. It's just one more choice among all the possible ways to expose it. Your web service should do little more than marshal and unmarshal the XML request/response objects and collaborate with Spring services.

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