java 如何从 JAX-WS Web 服务中访问 ApplicationContext？
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How can I access the ApplicationContext from within a JAX-WS web service?
提问by pihentagy
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?
类似于如何从 JAX-WS Web 服务中访问 ServletContext？，有没有办法访问applicationContext，比这更容易？
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;
}
}
采纳答案by duffymo
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?
我认为 Web 服务不必知道 Web 或 servlet 上下文或其应用程序上下文。我不明白为什么它必须知道任何这些。它不应该更被动吗？注入它需要的东西，让它做它的工作。与客户端的服务交互应该基于预先定义的契约。如果它必须从某种上下文中获取未知值，客户端如何知道需要设置什么或如何设置？
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.
我会更进一步说，Web 服务应该是 Spring 服务接口的包装器。这只是暴露它的所有可能方式中的另一种选择。您的 Web 服务应该只对 XML 请求/响应对象进行编组和解组，并与 Spring 服务协作。
回答by maximdim
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;
@WebService(
endpointInterface = "Bla",
targetNamespace = "http://bla/v001",
wsdlLocation = "WEB-INF/wsdl/bla.wsdl",
serviceName = "BlaService",
portName = "BlaPort")
public class BlaWs extends SpringBeanAutowiringSupport implements BlaPort {
@Autowired
@Qualifier("dao")
private Dao dao;
...
}
回答by Michael Wiles
回答by Maurice Perry
I would install a Filter that saves ServletContext before chaining in a ThreadLocal
我会安装一个过滤器，在链接到 ThreadLocal 之前保存 ServletContext
回答by user1955401
According to the JavaDoc for the SpringBeanAutowiringSupport class, see: http://docs.spring.io/autorepo/docs/spring-framework/3.0.x/api/org/springframework/web/context/support/SpringBeanAutowiringSupport.html
根据 SpringBeanAutowiringSupport 类的 JavaDoc，请参阅：http://docs.spring.io/autorepo/docs/spring-framework/3.0.x/api/org/springframework/web/context/support/SpringBeanAutowiringSupport.html
Read the NOTE: at the end of the javadoc.
阅读注意：在 javadoc 的末尾。
The original question, may in fact, be the way that this should be implemented.
最初的问题实际上可能是应该如何实施。
