3

我有这个方法：

/**
 * POST
 */
public static void create(String body) {
    Logger.info("APPOINTMENT create - json string: %s", body);

    Appointment appointment = null;
    try {
        appointment = new Gson().fromJson(body, Appointment.class);

        //services are detached, re-take them from db
        List<Service> refreshedServices = new ArrayList<Service>();
        for (final Service ser : appointment.services) {
            Service service = Service.findById(ser.id);
            refreshedServices.add(service);
        }
        appointment.services = refreshedServices;
        appointment.save();
        appointment.refresh();
        Logger.info("services refreshed");
    } catch (Exception ex) {
        Logger
                .info(
                        "An error has occured when trying to create an APPOINTMENT %s",
                        ex);
        response.status = Http.StatusCode.INTERNAL_ERROR;
        renderJSON(new StatusMessage(
                "An internal error has occured. Please try again later."));
    }

    renderJSON(appointment);
}

我正在像这样测试它：

public void createAppointment(final Contact contact, final List<Service> services) throws Exception {
        Appointment app = new Appointment();
        app.userUid = "cristi-uid";
        app.name = "app1";
        app.contact = contact;

        String serviceAsJson = "{\"userUid\":\"cristi-uid\",\"name\":\"app1\",\"allDay\":false,\"contact\":{\"id\":"+contact.id+"},\"services\":[{\"id\":\""+services.get(0).getId()+"\"},{\"id\":\""+services.get(1).getId()+"\"}]}";
        Response response = POST("/appointment/create", "application/json", serviceAsJson);

        Logger.info("POST was done");
        Appointment appReturned = new Gson().fromJson(response.out.toString(), Appointment.class);

        Logger.info("appointment create response: %s", response.out.toString());

        assertIsOk(response);
        assertEquals(appReturned.name, app.name);
    }

好吧，问题是它抛出了这个异常：

java.lang.RuntimeException: java.util.concurrent.ExecutionException: play.exceptions.JavaExecutionException
at play.test.FunctionalTest.makeRequest(FunctionalTest.java:304)
at play.test.FunctionalTest.makeRequest(FunctionalTest.java:310)
at play.test.FunctionalTest.POST(FunctionalTest.java:152)
at play.test.FunctionalTest.POST(FunctionalTest.java:120)
at play.test.FunctionalTest.POST(FunctionalTest.java:116)
at AppointmentsTest.createAppointment(AppointmentsTest.java:61)

我无法找出原因。

之后打印出来Logger.info("services refreshed");它抛出异常......

你们觉得这个测试帖子有什么问题吗？

更新：似乎问题来自尝试呈现appointment为 JSON：

Caused by: java.lang.StackOverflowError
at java.util.LinkedHashMap$LinkedHashIterator.(LinkedHashMap.java:345)
at java.util.LinkedHashMap$LinkedHashIterator.(LinkedHashMap.java:345)
at java.util.LinkedHashMap$ValueIterator.(LinkedHashMap.java:387)
at java.util.LinkedHashMap$ValueIterator.(LinkedHashMap.java:387)
at java.util.LinkedHashMap.newValueIterator(LinkedHashMap.java:397)
at java.util.HashMap$Values.iterator(HashMap.java:910)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:192)
at com.google.gson.Gson$FutureTypeAdapter.write(Gson.java:879)
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:96)
4

2 回答 2

1

这是因为：

Play 框架与 Google 的 JSON 库 Gson 捆绑在一起，但该库的开发人员已经做出了一些设计选择，使其不能理想地生成将发送到 HTTP 客户端的 JSON。

Erik Bakker推荐使用FlexSon

于 2012-11-06T14:13:17.470 回答
0

我能够通过深入研究错误跟踪来识别问题。基本上我的Appointment对象有一些关系，并且在尝试呈现这些关系时ManyToMany，renderJSON 似乎给出了。StackOverFlow

我创建了另一个Appointment对象并仅将需要导出的字段复制到其中。

    Appointment appointmentOutput = new Appointment();
    appointmentOutput.id = appointment.id;
    appointmentOutput.name = appointment.name;

    renderJSON(appointmentOutput);
于 2012-09-05T19:53:17.947 回答