是否可以从另一个调用一个jax-rs方法? [英] is it possible to call one jax-rs method from another?

问题描述

假设我有一些jax-rs资源类:

@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class ResourceA {
   @GET
   public Something get(@Context UriInfo uriInfo) {
      if (...) {
         //how to get to ResourceB ?
      }
   }
}

我想有条件地将调用重定向到其他jax-rs资源:

public class ResourceB {
   @GET
   @Path("{identifier}")
   public Other get(@PathParam("identifier")String someArg) {
   }
}

我该怎么做? 请注意，我不希望客户端看到此消息(因此不进行http重定向)，通常，我要重定向以不共享相同签名的资源方法(它们可能具有路径参数等，如我给出的示例).

在apache tomcat下运行im jersey 2.6(如果有帮助的话，它是一个春季应用程序)

编辑-我正在寻找与解决方案

您可以使用ResourceContext如下获得它:

@Context 
ResourceContext resourceContext;

这会将ResourceContext注入到您的Resource中.然后，您可以使用以下资源:

ResourceB b = resourceContext.getResource(ResourceB.class);

ResourceContext的Javadoc在这里.您可以找到类似的问题这里

suppose i have some jax-rs resource class:

@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class ResourceA {
   @GET
   public Something get(@Context UriInfo uriInfo) {
      if (...) {
         //how to get to ResourceB ?
      }
   }
}

and i want to conditionally redirect the call to some other jax-rs resource:

public class ResourceB {
   @GET
   @Path("{identifier}")
   public Other get(@PathParam("identifier")String someArg) {
   }
}

how do i do this? note that i dont want this to be visible to the client (so no http redirects) and generally the resource methods i want to redirect to dont share the same signature (they may have path params etc as in the example i gave).

im running jersey 2.6 under apache tomcat (its a spring app, if thats any help)

EDIT - im looking for a jax-rs equivalent of servlet forward. i dont want to do an extra http hop or worry abour instantiating resource classes myself

解决方案

You can get it using ResourceContext as follows:

@Context 
ResourceContext resourceContext;

This will inject the ResourceContext into your Resource. You then get the resource you want using:

ResourceB b = resourceContext.getResource(ResourceB.class);

The Javadoc for ResourceContext is here. You can find a similar question here

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