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，其中一种方法出现问题。

这里是资源界面：

public interface BasketItemResource  {

    @Delete
    public void removeBasketItem(String id);

    @Get
    public Representation listBasketItems();

    @Put
    public void addBasketItems(Representation items);
}

这是我的测试用例：

@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);

    }

listItems 测试执行良好，但是当我运行 testAddItems() 时，我首先收到此警告：

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)

随后是 (resource.addBasketItems(jRep);) 行的此堆栈跟踪：

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，找不到类org.restlet.client.ext.json.JsonConverter。确保在运行 junit 测试时包含类 org.restlet.client.ext.json.JsonConverter 的 jar 文件位于类路径中。或许将项目的 /WEB-INF/lib 文件夹添加到类路径可以解决您的问题。