GWT休眠弹簧序列化问题

嘿大家好！我正在开发一个GWT + Spring + Hibernate的应用程序，但是当我运行它，我得到这个错误：GWT休眠弹簧序列化问题

[WARN] Exception while dispatching incoming RPC call 
com.google.gwt.user.client.rpc.SerializationException: Type 'org.springframework.orm.jpa.JpaSystemException' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.: instance = org.springframework.orm.jpa.JpaSystemException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.karq.saatekava.shared.dto.TelekanalDTO; nested exception is javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.karq.saatekava.shared.dto.TelekanalDTO 
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:614) 
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126) 
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:152) 
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:534) 
    at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:616) 
    at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:390) 
    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588) 
    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:551) 
    at org.spring4gwt.server.SpringGwtRemoteServiceServlet.processCall(SpringGwtRemoteServiceServlet.java:37) 
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) 
    at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at org.mortbay.jetty.Server.handle(Server.java:324) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) 
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) 
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) 
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) 
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) 
[ERROR] 500 - POST /saatekava/springGwtService/telekanalService (127.0.0.1) 57 bytes

来源

2011-04-22 karq

你有2个问题：

您正在尝试坚持分离对象。你应该合并它。
1）引起的异常不可序列化，因为GWT没有注意到它在您的rpc服务签名中。简单的解决方案 - 在RPC服务方法中捕获异常并抛出自定义异常。

退房Gilead，它可能帮助。

public void someRpcMethod() throws MyException{ 
    try{ 
    dosomething(); 
    }catch(RuntimeException e){ 
    throw new MyException("something failed", e); 
    } 
}

Tt可能是个好主意，不要将所有异常传递给客户端，并以不同方式处理它们。在这里您可以获得更多信息：http://code.google.com/webtoolkit/doc/latest/tutorial/RPC.html#exceptions

来源

2011-04-22 19:33:54 mabn

GWT休眠弹簧序列化问题

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