带有 gradle 的球衣测试框架 - MessageBodyProviderNotFound

Question

我的处境有点困难。我正在使用 jersey 提供 REST 服务。

在我的运行时，我使用版本：1.16.0：

restClasspath(
'org.codehaus.jackson:jackson-core-asl:1.9.2',
'org.codehaus.jackson:jackson-mapper-asl:1.9.2',
'com.sun.jersey:jersey-core:1.16.0',
'com.sun.jersey:jersey-server:1.16.0',
)

这是我的资源类：

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import ....model.DecisionTree;
import ...model.TestDataProvider;

@Path("new_rest")
public class NewPublicAPIRestResource {

  @GET
  @Produces(MediaType.APPLICATION_JSON)
  @Path("ppp/{param}")
  public Response getHello(@PathParam("param") String treeName) {
      DecisionTree tree = TestDataProvider.createDecisionTree();
      return Response.ok(tree).build();
  }  
}

这行得通，我得到了预期的 json 响应。

现在我发现了jersey-testframework，它为集成测试提供了一个内存服务器。

不幸的是，这似乎只适用于 jersey 2.x，所以我为我的测试添加了一个额外的 gradle 设置：

testClasspath(
'org.glassfish.jersey.core:jersey-common:2.7',
'org.glassfish.jersey.core:jersey-server:2.7',
'org.glassfish.jersey.core:jersey-client:2.7',
'org.glassfish.hk2:hk2:2.2.0',
'org.glassfish.jersey.test-framework.providers:jersey-test-framework-provider-inmemory:2.7',    
 )

这是我的测试课：

import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;    
import ...resource.NewPublicAPIRestResource;

public class ConditionNodeTest extends JerseyTest{

    @Override
    protected Application configure() {
        return new ResourceConfig(NewPublicAPIRestResource.class);
    }

    @Test
    public void test() {
        System.out.println(target("new_rest/ppp/param").request().get(String.class));
    }
}

只要我的资源返回String，此设置就可以工作。但是，只要我返回 Response，如我的代码所示，我就会收到此错误：

javax.ws.rs.ProcessingException: Server-side request processing failed with an error.
    ...
    at org.glassfish.jersey.internal.Errors.process(Errors.java:228)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:424)
    at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:667)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:396)
    at org.glassfish.jersey.client.JerseyInvocation$Builder.get(JerseyInvocation.java:296)
    at ....model.ConditionNodeTest.test(ConditionNodeTest.java:39)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    ...
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    ...
Caused by: org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=application/json, type=class ....model.DecisionTree, genericType=class ....model.DecisionTree.
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:247)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
    at org.glassfish.jersey.server.internal.JsonWithPaddingInterceptor.aroundWriteTo(JsonWithPaddingInterceptor.java:103)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
    at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:88)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1154)
    at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:571)
    at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:378)
    at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:368)
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:262)
    ... 44 more

据我所知，我缺少一些将我的类解析为 json 的提供程序，但我就是不知道是哪一个。我尝试在我的类路径中添加一些库，例如：

'org.glassfish.jersey.media:jersey-media-jaxb:2.16'
'org.glassfish.jersey.media:jersey-media-json-jackson:2.7

还有其他几个我不记得了，但没有得到它的工作。

任何想法我在这里缺少什么？

谢谢， 斯文

Answer 1

这是正确的

'org.glassfish.jersey.media:jersey-media-json-jackson:2.7'

但是直到 Jersey 2.9，我们仍然需要在应用程序中注册 JacksonFeature（如 here 所述）。所以就做吧

@Override
protected Application configure() {
    return new ResourceConfig(NewPublicAPIRestResource.class)
            .register(JacksonFeature.class);
}

---

哦，顺便说一句，Jersey 1.x 也有 Jersey 测试框架。只是 API 有点不同，但功能还是一样的。参见示例here 和here，这里是in-memory provider。但无论如何，我建议坚持使用 Jersey 2.x。