如何在Google App Engine上创建RESTful客户端？

Question

我正在尝试在使用Json的Google App Engine（Java）上创建RESTful Web服务客户端。 我已经尝试过Sitebricks和Jersey，但它们似乎都不起作用。 是否有可用于在GAE上创建RESTful Web服务客户端的框架？

Sitebricks的例外情况：

Caused by: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "modifyThreadGroup")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
    at java.security.AccessController.checkPermission(AccessController.java:555)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:283)
    at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:308)
    at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:315)
    at java.lang.Thread.init(Thread.java:376)
    at java.lang.Thread.<init>(Thread.java:525)
    at com.ning.http.client.AsyncHttpClientConfig$Builder$2.newThread(AsyncHttpClientConfig.java:421)
    at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:598)
    at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:913)
    at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1336)
    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:132)
    at com.ning.http.client.providers.jdk.JDKAsyncHttpProvider.execute(JDKAsyncHttpProvider.java:156)
    at com.ning.http.client.providers.jdk.JDKAsyncHttpProvider.execute(JDKAsyncHttpProvider.java:123)
    at com.ning.http.client.AsyncHttpClient.executeRequest(AsyncHttpClient.java:496)
    at com.google.sitebricks.client.AHCWebClient.simpleRequest(AHCWebClient.java:85)
    at com.google.sitebricks.client.AHCWebClient.get(AHCWebClient.java:133)

对于泽西岛：

Caused by: java.security.AccessControlException: access denied ("javax.xml.bind.JAXBPermission" "setDatatypeConverter")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
    at java.security.AccessController.checkPermission(AccessController.java:555)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:283)
    at javax.xml.bind.DatatypeConverter.setDatatypeConverter(DatatypeConverter.java:134)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl$3.run(JAXBContextImpl.java:304)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl$3.run(JAXBContextImpl.java:303)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:302)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1170)
    at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:145)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:248)
    at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:235)
    at javax.xml.bind.ContextFinder.find(ContextFinder.java:432)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:637)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:584)
    at com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getStoredJAXBContext(AbstractJAXBProvider.java:194)
    at com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getJAXBContext(AbstractJAXBProvider.java:187)
    at com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getUnmarshaller(AbstractJAXBProvider.java:139)
    at com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getUnmarshaller(AbstractJAXBProvider.java:122)
    at com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:111)
    at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:565)
    at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:517)
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:684)
    at com.sun.jersey.api.client.WebResource.get(WebResource.java:191)

Answer 1

google-api-java-client怎么样？

在某种程度上，您需要的功能是发出HTTP请求并将响应解析为JSON。 除此以外，您还在寻找什么功能使泽西/塞特布里克更具吸引力？

Answer 2

尝试jello-framework 。 它使您可以通过RESTful（OData）服务公开数据模型，并提供开箱即用的UI视图，以便您可以测试应用程序并立即开始与数据进行交互。

披露-我是Jello框架的创建者。 不过，我决定将其添加为GAE上RESTful客户端的有效答案，因为它可以为所提出的问题提供良好的解决方案。