如何在泽西岛列出所有已注册的JAX-RS实体提供商

Question

让我们假设我有一个简单的泽西应用程序,在github上嵌入了jetty Demo项目,下面是基本代码.

回到jersey1的日子我有日志消息:

??? 07, 2016 5:05:50 AM com.sun.jersey.api.core.PackagesResourceConfig init
INFO: Scanning for root resource and provider classes in the packages:
  ru.varren
??? 07, 2016 5:05:50 AM com.sun.jersey.api.core.ScanningResourceConfig logClasses
INFO: Root resource classes found:
  class ru.varren.MyResource
??? 07, 2016 5:05:50 AM com.sun.jersey.api.core.ScanningResourceConfig logClasses
INFO: Provider classes found:
  class ru.varren.JsonProvider
??? 07, 2016 5:05:50 AM com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
INFO: Initiating Jersey application, version 'Jersey: 1.19.1 03/11/2016 02:08 PM'

但现在我正在尝试使用jersey2和thiere不再是日志信息.所以,我的问题是如何列出所有已注册的JAX-RS实体提供商.我不在乎在哪里列出它们.在main功能或某种 @GET MyResource方法.可能我应该在我的设置中更改一些东西或者放置logger布尔值,但是找不到它.

这纯粹是为了测试目的.所有提供者类的简单打印对我来说已经足够了.冷却器选项是打印提供者和accosiated @Produces和@ConsumesMediaType.

MyResource.java

@Path("test")
public class MyResource {

    @GET
    @Produces({ MediaType.APPLICATION_JSON })
    public Response  getPersons() {
        return Response.ok("[some data here]").build();
    }

}

MyApplication.java

public class MyApplication {

    public static void main(String[] args) throws Exception {
        URI baseUri = UriBuilder.fromUri("http://localhost/").port(9998).build();
        ResourceConfig config = new ResourceConfig(MyResource.class);
        config.packages("ru.varren");
        Server server = JettyHttpContainerFactory.createServer(baseUri, config, true);
        server.join();
    }

}

和gradle.build

dependencies {  
    compile 'org.glassfish.jersey.containers:jersey-container-servlet:2.22.2'
    compile 'org.glassfish.jersey.containers:jersey-container-servlet-core:2.22.2'
    compile 'org.glassfish.jersey.media:jersey-media-json-jackson:2.22.2'
    compile 'org.glassfish.jersey.containers:jersey-container-jetty-http:2.22.2'

    compile 'org.eclipse.jetty:jetty-server:9.1.0.M0'
    compile 'org.eclipse.jetty:jetty-servlet:9.1.0.M0'
}

Answer 1

您可以使用ApplicationEventListener，然后INITIALIZATION_FINISHED，您可以从ApplicationEvent. 例如

@Provider
public class ProviderLoggingListener implements ApplicationEventListener {
 
    @Override
    public void onEvent(ApplicationEvent event) {
        switch (event.getType()) {
            case INITIALIZATION_FINISHED: {
                Set<Class<?>> providers = event.getProviders();
                ResourceConfig immutableConfig = event.getResourceConfig();
                ResourceModel resourcesModel = event.getResourceModel();
                break;
            }
        }
    }
 
    @Override
    public RequestEventListener onRequest(RequestEvent requestEvent) {
        return null;
    }
}

也可以看看：

• 列出所有已部署的 rest 端点 (spring-boot, jersey)，其中显示了遍历ResourceModel