使用JAX-RS继承

Question

public interface ICRUD {

    @POST
    @Consumes("application/json")
    @Produces("application/json")
    @Path("create")
    public String createREST(String transferObject);

    @GET
    @Consumes("application/json")
    @Produces("application/json")
    @Path("retrieve/{id}")
    public String retrieveREST(@PathParam("id") String id);

    @POST
    @Consumes("application/json")
    @Produces("application/json")
    @Path("update")
    public void updateREST(@Suspended final AsyncResponse asyncResponse,
                           final String transferObject) ;

    @DELETE
    @Consumes("application/json")
    @Produces("application/json")
    @Path("delete/{id}")
    public String deleteREST(@PathParam("id") String id); 
}

public abstract class BaseREST implements ICRUD{

private final ExecutorService executorService = Executors.newCachedThreadPool();

@Override
public String createREST(String transferObject) {
    return create(transferObject).toJson();
}

@Override
public String retreiveREST(@PathParam("id") String id) {
    return retreive(id).toJson();
}


@Override
public String deleteREST(
        @PathParam("id") String id) {
    return delete(id).toJson();
}

@Override
    public void updateREST(@Suspended final AsyncResponse asyncResponse, final String transferObject) {
        executorService.submit(new Runnable() {
            @Override
            public void run() {
                asyncResponse.resume(doUpdateREST(transferObject));
            }
        });
    }      

}

@Path("meeting")
public class MeetingRestServices extends BaseREST {
}

http://localhost:8080/webresources/meeting/retreive/0

webresources定义如下。这个类是由NetBeans自动添加的。

@javax.ws.rs.ApplicationPath("webresources")
public class ApplicationConfig extends Application {

    @Override
    public Set<Class<?>> getClasses() {
        Set<Class<?>> resources = new java.util.HashSet<>();
        addRestResourceClasses(resources);
        return resources;
    }

    /**
     * Do not modify addRestResourceClasses() method.
     * It is automatically populated with
     * all resources defined in the project.
     * If required, comment out calling this method in getClasses().
     */
    private void addRestResourceClasses(Set<Class<?>> resources) {
        resources.add(com.dv.meetmefor.ws.impl.BinaryDataRestService.class);
        resources.add(com.dv.meetmefor.ws.impl.ImageRestServices.class);
        resources.add(com.dv.meetmefor.ws.impl.LocaleRestService.class);
        resources.add(com.dv.meetmefor.ws.impl.MeetUpRestServices.class);
        resources.add(com.dv.meetmefor.ws.impl.MeetingRestServices.class);
        resources.add(com.dv.meetmefor.ws.impl.UserAccountRestServices.class);
    }

}

Answer 1

你上面描述的看起来不错。以下是JAX-RS继承的规则，这些规则基于您所提供的内容。

来自JAX-RS规范§3.6:

JAX-RS注释可以用于超类或已实现接口的方法和方法参数。这样的注释由相应的子类或实现类方法继承，前提是该方法及其参数本身没有任何JAX-RS注释。超类上的注释优先于已实现接口上的注释。如果子类或实现方法有任何JAX-RS注释，则忽略超类或接口方法上的所有注释。例如：

public interface ReadOnlyAtomFeed {
    @GET @Produces("application/atom+xml")
    Feed getFeed();
}

@Path("feed")
public class ActivityLog implements ReadOnlyAtomFeed {
    public Feed getFeed() {...}
}

@Path("feed")
public class ActivityLog implements ReadOnlyAtomFeed {
    @Produces("application/atom+xml")
    public Feed getFeed() {...}
}