Restlet内部500错误

Question

我正在为我的GAE托管服务构建一个jUnit测试用例，其中一种方法有问题。

以下是资源接口：

public interface BasketItemResource { 

    @Delete 
    public void removeBasketItem(String id); 

    @Get 
    public Representation listBasketItems(); 

    @Put 
    public void addBasketItems(Representation items); 
} 

，这里是我的测试情况：

@Test 
public void testListItems() { 

    Gson gson = new Gson(); 
    List<BasketItem> items = null; 

    JsonRepresentation jRep = null; 
    Type collectionType = new TypeToken<List<BasketItem>>(){}.getType(); 
    try { 
     jRep = new JsonRepresentation(resource.listBasketItems()); 
     items = gson.fromJson(jRep.getJsonArray().toString(), collectionType); 
    } catch (JsonSyntaxException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } catch (JSONException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

    assertEquals(items.size(), 5); 
} 

@Test 
public void testAddItem() { 
    Gson gson = new Gson(); 

    BasketItem b = new BasketItem(); 
    b.basketItemID = 123; 
    b.brandName = "Pepsi"; 
    b.description = "Cola Beverage"; 
    b.upc = "123123123"; 

    List<BasketItem> items = new ArrayList<BasketItem>(); 
    items.add(b); 

    JsonRepresentation jRep = null; 
    try { 
     jRep = new JsonRepresentation(new JSONArray(gson.toJson(items))); 
    } catch (JSONException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

    resource.addBasketItems(jRep); 

    } 

的listItems中的测试执行罚款，但是当我运行testAddItems（）我第一次得到这样的警告：

INFO: Unable to register the helper org.restlet.client.ext.json.JsonConverter java.lang.ClassNotFoundException: org.restlet.client.ext.json.JsonConverter at org.restlet.engine.util.EngineClassLoader.findClass(EngineClassLoader.java:101) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at org.restlet.engine.Engine.registerHelper(Engine.java:723) at org.restlet.engine.Engine.registerHelpers(Engine.java:761) at org.restlet.engine.Engine.registerHelpers(Engine.java:801) at org.restlet.engine.Engine.discoverConverters(Engine.java:509) at org.restlet.engine.Engine.<init>(Engine.java:337) at org.restlet.engine.Engine.register(Engine.java:248) at org.restlet.engine.Engine.register(Engine.java:237) at org.restlet.engine.Engine.getInstance(Engine.java:149) at org.restlet.data.Method.<init>(Method.java:331) at org.restlet.data.Method.<init>(Method.java:390) at org.restlet.data.Method.<init>(Method.java:355) at org.restlet.data.Method.<clinit>(Method.java:54) at org.restlet.engine.resource.AnnotationUtils.addAnnotationDescriptors(AnnotationUtils.java:82) at org.restlet.engine.resource.AnnotationUtils.addAnnotations(AnnotationUtils.java:132) at org.restlet.engine.resource.AnnotationUtils.getAnnotations(AnnotationUtils.java:231) at org.restlet.resource.ClientResource.wrap(ClientResource.java:1548) at com.tests.tests.BasketItemUploadTests.setUp(BasketItemUploadTests.java:43) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

其次是这个堆栈跟踪在（resource.addBasketItems（jRep）;）行：

Internal Server Error (500) - Internal Server Error at org.restlet.resource.ClientResource$1.invoke(ClientResource.java:1655) at $Proxy9.addBasketItems(Unknown Source) at com.tests.tests.BasketItemUploadTests.testAddItem(BasketItemUploadTests.java:84) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Answer 1

根据您发布的堆栈跟踪，类org.restlet.client.ext.json.JsonConverter无法找到。确保在运行junit测试时，包含类org.restlet.client.ext.json.JsonConverter的jar文件位于您的类路径中。也许将项目的/WEB-INF/lib文件夹添加到类路径将解决您的问题。