InvalidClassException: правильный конструктор

При запуске приложения в локальном хосте, он работает, но при развертывании на GAE, бросить следующее сообщение об ошибке:InvalidClassException: правильный конструктор

http://myapp.appspot.com/Login 
javax.servlet.ServletException: java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:268) 
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$RequestHandler.headerComplete(HttpConnection.java:923) 
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) 
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146) 
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439) 
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435) 
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442) 
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186) 
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306) 
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298) 
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439) 
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) 
at java.lang.Thread.run(Thread.java:722) 
    Caused by: java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:57) 
at com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:39) 
at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:327) 
at com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:301) 
at org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:237) 
at org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:246) 
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:136) 
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266) 
... 16 more 
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:730) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012) 
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396) 
at java.util.HashMap.readObject(HashMap.java:1043) 
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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:991) 
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1914) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012) 
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396) 
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:55) 
... 25 more 
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:488) 
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:327) 
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:564) 
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1649) 
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1562) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) 
... 46 more 
W 2013-09-19 21:44:19.795 
Nested in javax.servlet.ServletException:  java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor: 
java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:57) 
at com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:39) 
at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:327) 
at com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:301) 
at org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:237) 
at org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:246) 
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:136) 
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266) 
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.headerComplete(HttpConnection.java:923) 
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) 
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146) 
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439) 
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435) 
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442) 
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186) 
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306) 
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298) 
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439) 
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) 
at java.lang.Thread.run(Thread.java:722) 
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:730) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012) 
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396) 
at java.util.HashMap.readObject(HashMap.java:1043) 
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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:991) 
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1914) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012) 
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819) 
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395) 
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396) 
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:55) 
... 25 more 
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor 
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:488) 
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:327) 
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:564) 
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1649) 
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1562) 
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) 
... 46 more

В MercadoriaMbean.java:

public class MercadoriaMBean implements Serializable { 

private MercadoriaDAO dao; 

public MercadoriaMBean() { 
    dao = new MercadoriaDAOOfyImpl(); 
    fillMercadorias(); 
}

MercadoriaDAOOfyImpl. Java:

public class MercadoriaDAOOfyImpl extends AbstractObjectifyDAO<Mercadoria> 
    implements Serializable, MercadoriaDAO { 

public MercadoriaDAOOfyImpl() { 
    super(Mercadoria.class); 
}

AbstractObjectifyDAO.java:

public class AbstractObjectifyDAO<T extends AbstractEntity> { 

private Class<T> clazz; 

public AbstractObjectifyDAO(Class<T> clazz) { 
    this.clazz = clazz; 
}

EDIT

Использование Reflection:

public AbstractObjectifyDAO(String clazz) { 

    ClassLoader myClassLoader = ClassLoader.getSystemClassLoader(); 

    try { 
     this.clazz = (Class<T>) myClassLoader.loadClass(clazz); 
    } catch (ClassNotFoundException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
}

ошибку Метание:

java.lang.IllegalArgumentException: Class hierarchy for class br.com.myapp.model.Mercadoria has no @Entity annotation

В AbstractObjectifyDAO.class:

public List<T> getAll() { 
    return ofy().load().type(clazz).list(); 
}

Я проверил, что у Mercadoria.class есть аннотация @Entity.

источник

2013-09-20 vctlzac

Как вы пытаетесь создать экземпляр MercadoriaDAOOfyImpl? –

То, что я понял из трассировки стека, заключается в том, что ошибка возникает, когда MercadoriaDAOOfyImpl десериализуется. Для десериализации требуется, чтобы класс имел конструктор no-args, который имеет значение для MercadoriaDAOOfyImpl, а класс - serialVersionUID.

Из документации Java here:

The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersionUID than that of the corresponding sender's class, then deserialization will result in an InvalidClassException . A serializable class can declare its own serialVersionUID explicitly by declaring a field named "serialVersionUID" that must be static, final, and of type long.

Я не вижу serialVersionUID в MercadoriaDAOOfyImpl так, если он отсутствует, вы можете попробовать добавить его первый и посмотреть, если это решает проблему.

Если она есть, или это не решает проблему и попробовать удалить параметр Class<T> clazz из AbstractObjectifyDAO конструктора и получил clazz с помощью отражения и увидеть, если проблема будет решена, или давайте посмотрим, что ошибка будет в этом случае.

источник

2013-09-20 12:45:45

Использование серийного идентификатора не работает, но когда я устанавливаю this.clazz = Mercadoria.class; работал! Но я стараюсь использовать рефлексию для сохранения общего кода для всех моделей. – vctlzac

Посмотрите отредактированный вопрос. Проблема отражения. – vctlzac

@vctlzac Идея использования отражения состоит в том, чтобы сделать 'AbstractObjectifyDAO' конструктором no-args. Удалите параметр строки и используйте отражение, чтобы получить класс из T - общий параметр самого класса. –

InvalidClassException: правильный конструктор

ответ

Смежные вопросы