Restlet無效的類型簽名com.google.appengine.api.datastore.GeoPt

Question

美好的一天。在本應用中，我一直在使用restlet 2.1.1，並與objectify-appengine結合使用。自從升級到物化階段（3.1至4.0b）以來，我就遇到了問題，即堅持任何包含非空的GeoPt對象的實體，它之前曾經工作過。使用 版本： * AppEngine上的Java-1.7.4 *的Restlet-2.1.1 *物化-的AppEngine-4.0B

啓動託管模式後，我得到的錯誤看起來它可能是一個暗示：

Invoking generator org.restlet.rebind.ClientProxyGenerator 
... 
private com.google.appengine.api.datastore.GeoPt geoPt 
com.google.appengine.api.datastore.GeoPt 
Verifying instantiability 
Analyzing the fields of type 'com.google.appengine.api.datastore.GeoPt' that qualify for serialization 
Field 'private final float latitude' will not be serialized because it is final 
Field 'private final float longitude' will not be serialized because it is final 

只要他們GeoPt變量爲空我能堅持的任何實體，只要我堅持一個數據對象的非空GeoPt我得到的AppEngine控制檯上報告了以下錯誤：

12 Feb 2013 7:51:35 AM org.restlet.service.ConverterService toObject 
WARNING: Unable to convert a [application/x-java-serialized-object+gwt,UTF-8] representation into an object of class 
java.io.IOException: Couldn't read the GWT object representation: Invalid type signature for com.google.appengine.api.datastore.GeoPt 
at org.restlet.ext.gwt.ObjectRepresentation.getObject(ObjectRepresentation.java:126) 
at org.restlet.ext.gwt.GwtConverter.toObject(GwtConverter.java:149) 
at org.restlet.service.ConverterService.toObject(ConverterService.java:167) 
at org.restlet.resource.Resource.toObject(Resource.java:784) 
at org.restlet.resource.ServerResource.doHandle(ServerResource.java:481) 
at org.restlet.resource.ServerResource.doHandle(ServerResource.java:545) 
at org.restlet.resource.ServerResource.put(ServerResource.java:1234) 
at org.restlet.resource.ServerResource.doHandle(ServerResource.java:425) 
at org.restlet.resource.ServerResource.doNegotiatedHandle(ServerResource.java:646) 
at org.restlet.resource.ServerResource.doConditionalHandle(ServerResource.java:341) 
at org.restlet.resource.ServerResource.handle(ServerResource.java:942) 
at org.restlet.resource.Finder.handle(Finder.java:246) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.routing.Router.doHandle(Router.java:431) 
at org.restlet.routing.Router.handle(Router.java:648) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:154) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.engine.CompositeHelper.handle(CompositeHelper.java:211) 
at org.restlet.engine.application.ApplicationHelper.handle(ApplicationHelper.java:84) 
at org.restlet.Application.handle(Application.java:377) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.routing.Router.doHandle(Router.java:431) 
at org.restlet.routing.Router.handle(Router.java:648) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.routing.Router.doHandle(Router.java:431) 
at org.restlet.routing.Router.handle(Router.java:648) 
at org.restlet.routing.Filter.doHandle(Filter.java:159) 
at org.restlet.routing.Filter.handle(Filter.java:206) 
at org.restlet.engine.CompositeHelper.handle(CompositeHelper.java:211) 
at org.restlet.Component.handle(Component.java:392) 
at org.restlet.Server.handle(Server.java:516) 
at org.restlet.engine.ServerHelper.handle(ServerHelper.java:72) 
at org.restlet.engine.adapter.HttpServerHelper.handle(HttpServerHelper.java:152) 
at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1089) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) 
at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:59) 
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:49) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:61) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94) 
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:383) 
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
at org.mortbay.jetty.Server.handle(Server.java:326) 
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938) 
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) 
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) 
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) 
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
Caused by: com.google.gwt.user.client.rpc.SerializationException: Invalid type signature for com.google.appengine.api.datastore.GeoPt 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.validateTypeVersions(ServerSerializationStreamReader.java:1116) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserialize(ServerSerializationStreamReader.java:610) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.readObject(ServerSerializationStreamReader.java:567) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader$ValueReader$8.readValue(ServerSerializationStreamReader.java:140) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeValue(ServerSerializationStreamReader.java:425) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeClass(ServerSerializationStreamReader.java:807) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeImpl(ServerSerializationStreamReader.java:878) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserialize(ServerSerializationStreamReader.java:662) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserialize(ServerSerializationStreamReader.java:587) 
at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:119) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader$ValueReader$8.readValue(ServerSerializationStreamReader.java:134) 
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeValue(ServerSerializationStreamReader.java:414) 
at org.restlet.ext.gwt.ObjectRepresentation.getObject(ObjectRepresentation.java:122) 
... 80 more 

注意：在有人建議我使用DTO或Restlet或Objectify之外的其他框架之前，我特意選擇了此組合用於Restful服務，以便可以在客戶端重新使用數據對象而無需繁瑣的DTO和轉換。

感謝 皮埃爾

Answer 1

它看起來這是一個已知的bug：https://code.google.com/p/objectify-appengine/issues/detail?id=135