Java Spring + Jersey 子资源 : inject constructor-arg at runtime

Question

我定义了以下方法，返回一个表示子资源定位器( Jersey )的 bean:

@Path("{slug}")
public PageResource page( 
        @PathParam("slug") String siteSlug) throws AppException { 

    siteService.getSiteBySlug(siteSlug); //Validate if exists, else throw error 

    return (PageResource) appContext.getBean("pageResource", siteSlug); 
}

pageResource 具有在 applicationContext.xml 中定义的原型(prototype)范围。

问题:在运行时传递构造函数参数的同时将 bean 注入(inject)当前类的替代方法是什么？
我不习惯从应用程序上下文中显式获取 bean。

编辑@peeskillet:

子资源:

public class PageResource {
    @Autowired
    IPageService pageService; 

    String siteSlug; 

    public void setPageService(IPageService pageService){
        this.pageService = pageService; 
    }

    public PageResource(){}

    public PageResource(String siteSlug){ //***Inject siteSlug from parent here***
        this.siteSlug = siteSlug; 
    }; 

    @POST
    @Path("/pages")
    @Consumes({ MediaType.APPLICATION_JSON })
    @Produces({ MediaType.APPLICATION_JSON })
    public Response createPage(@NotNull @Valid Page page) throws AppException{ 
        System.out.println(pageService);
        ObjectId pageId = pageService.createPage(page); 
        page.setId(pageId); 

        return Response
                .status(Response.Status.CREATED)// 201 
                .entity(page)
                .header("Location", 
                        "http://localhost:8000/zwoop-v001/sites/" + this.siteSlug + 
                        "/pages/" + page.getSlug()).build(); 
    }
} 

Answer 1

你能做的就是注入(inject)ResourceContext ，并通过它解析子资源实例。

The resource context can be utilized when instances of managed resource classes are to be returned by sub-resource locator methods. Such instances will be injected and managed within the declared scope just like instances of root resource classes.

如上所述，您可以获得子资源类的实例，并且所有注入(inject)都将被处理

@Path("root")
public class Resource {

    @Context
    ResourceContext context;

    @Path("sub/{id}")
    public SubResource get() {
        return context.getResource(SubResource.class);
    }
}

@PathParam 也被解析为注入(inject)到您的子资源实例中。所以你可以这样做

class SubResource {

    @Autowired
    Service service;

    @PathParam("id")
    long id;
}

当子资源实例被解析时，它将被注入(inject)服务和路径参数。