On Tuesday, October 22, 2013 11:40:48 AM UTC+2, Thomas Broyer wrote:
>
>
>
> On Monday, October 21, 2013 11:11:07 PM UTC+2, Nermin wrote:
>>
>> Dear Thomas,
>>
>> thank you for your Post. I have checked my OSIV konfiguration and I have
>> it the right way (transaction per service method).
>>
>
> Apparently not (see below)
>
OK, let me show you my OSIV code:
=========== THREAD LOCAL EM
public class ThreadLocalEntityManager {
private static ThreadLocal<EntityManager> holder = new
ThreadLocal<EntityManager>();
private ThreadLocalEntityManager() {
}
public static EntityManager get() {
return holder.get();
}
public static void set(EntityManager em) {
holder.set(em);
}
}
=========== FILTER
public class AppHandlerFilter implements Filter {
....
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
//1. Create new EntityManager for this call
EntityManager em = factory.createEntityManager();
ThreadLocalEntityManager.set(em); //== Create EM
try {
chain.doFilter(request, response);
} catch (Exception e) { //Any other Exception
if(em.getTransaction().isActive()) {
em.getTransaction().rollback();
}
logger.severe(e.getMessage());
e.printStackTrace();
} finally {
if(em.isOpen()) {
em.close(); //== Close EM
}
}
}
}
======== Entity:
@Entity
public class TestEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@org.datanucleus.api.jpa.annotations.Extension(vendorName =
"datanucleus", key = "gae.encoded-pk", value = "true")
private String id;
@Version
private Long version;
@NotNull
private String myName;
@Pattern(regexp = "[^@\\s]+@[^@\\s]+\\.[A-Za-z]{2,4}", message="Invalid
e-mail address")
@NotNull
private String myEmailAddress;
public static TestEntity findTestEntity(String id) {
if (id == null) {
return null;
}
TestEntity te = null;
EntityManager em = ThreadLocalEntityManager.get();
em.getTransaction().begin();
te = em.find(TestEntity.class, id);
em.getTransaction().commit();
return te;
}
public ProcessResponse persist() {
EntityManager em = ThreadLocalEntityManager.get();
em.getTransaction().begin();
em.persist(this);
em.refresh(this);
em.getTransaction().commit();
return new ProcessResponse(this.getId(), true);
}
public ProcessResponse update(){
EntityManager em = ThreadLocalEntityManager.get();
em.getTransaction().begin();
em.merge(this);
em.getTransaction().commit();
return new ProcessResponse(true);
}
...
}
==== persistence.xml
<persistence-unit name="emajstor_persistence"
transaction-type="RESOURCE_LOCAL">
<provider>org.datanucleus.api.jpa.PersistenceProviderImpl</provider>
<class>com.emajstor.server.persistence.TestEntity</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="datanucleus.NontransactionalRead" value="true"/>
* <property name="datanucleus.NontransactionalWrite"
value="true"/>*
<property name="datanucleus.ConnectionURL" value="appengine"/>
<property
name="datanucleus.appengine.datastoreEnableXGTransactions" value="true"/>
<property name="javax.persistence.validation.group.pre-persist"
value="javax.validation.groups.Default,
com.emajstor.server.persistence.validator.PrePersitValidationGroup" />
<property name="javax.persistence.validation.group.pre-update"
value="javax.validation.groups.Default" />
<property name="javax.persistence.validation.group.pre-remove"
value="" />
</properties>
</persistence-unit>
>
>> The debuggung in ReflectiveServiceLayer#validate showed sofar an
>> appropriate behaviour.
>>
>
> So it correctly returns ConstraintViolations in all cases?
>
YES! Validation works fine!
>
>
>> The only problem is that the *javax.validation.ConstraintViolationException
>> *is turned into a *java.lang.RuntimeException *in case of an entity
>> update. (see error below.)
>>
>
> There shouldn't be any ConstraintViolation*Exception*.
>
Why shouldn't be there a ConstraintViolation*Exception*?? The entity
contains constraint violation because the provided emailAddress is
purposely made wrong!
> I cannot figure out why is this happening.
>> I personally find GWT beeing an easy and very elegant tool for web
>> development. The Appengine-Datastore-handling part is in my point of view a
>> real pain in the ass.
>>
>
> JPA and JDO are a PITA, whether or not they're used on AppEngine.
> There are alternatives though (e.g. Objectify).
>
I agree. Maybe Objectify would be a "better" alternative. Unfortunately I
have 12 Entities which I would need to migrate and to test, and there are
almost no examples how to use Objectify 4 with the Requestfactory.
>
> com.google.web.bindery.event.shared.UmbrellaException: Exception caught:
>> Server Error 500 <html>
>> <head>
>> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
>> <title>Error 500 Validation failed for
>> com.emajstor.server.persistence.TestEntity@59778fd8 during pre-update for
>> groups [interface javax.validation.groups.Default] - exceptions are
>> attached</title>
>> </head>
>> <body><h2>HTTP ERROR 500</h2>
>> <p>Problem accessing /unAuthRequestFactory. Reason:
>> <pre> Validation failed for
>> com.emajstor.server.persistence.TestEntity@59778fd8 during pre-update for
>> groups [interface javax.validation.groups.Default] - exceptions are
>> attached</pre></p><h3>Caused by:</h3><pre>*
>> javax.validation.ConstraintViolationException*: Validation failed for
>> com.emajstor.server.persistence.TestEntity@59778fd8 during pre-update for
>> groups [interface javax.validation.groups.Default] - exceptions are attached
>> at
>> org.datanucleus.validation.BeanValidatorHandler.validate(BeanValidatorHandler.java:71)
>> at
>> org.datanucleus.validation.BeanValidatorHandler.preStore(BeanValidatorHandler.java:86)
>> at
>> org.datanucleus.api.jpa.JPACallbackHandler.preStore(JPACallbackHandler.java:102)
>> at
>> org.datanucleus.state.JDOStateManager.flush(JDOStateManager.java:3827)
>> at
>> org.datanucleus.ObjectManagerImpl.flushInternalWithOrdering(ObjectManagerImpl.java:3888)
>> at
>> org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java:3811)
>> at
>> org.datanucleus.ObjectManagerImpl.flush(ObjectManagerImpl.java:3751)
>> at
>> org.datanucleus.ObjectManagerImpl.preCommit(ObjectManagerImpl.java:4141)
>> at
>> org.datanucleus.ObjectManagerImpl.transactionPreCommit(ObjectManagerImpl.java:428)
>> at
>> org.datanucleus.TransactionImpl.internalPreCommit(TransactionImpl.java:398)
>> at org.datanucleus.TransactionImpl.commit(TransactionImpl.java:287)
>> at
>> org.datanucleus.ObjectManagerImpl.close(ObjectManagerImpl.java:1090)
>> at
>> org.datanucleus.api.jpa.JPAEntityManager.close(JPAEntityManager.java:193)
>> at
>> com.emajstor.server.AppHandlerFilter.doFilter(AppHandlerFilter.java:91)
>> at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>>
>
> Your OSIV filter is causing a TransactionImpl.commit, which means there's
> a transaction spanning the entire request (or maybe you have auto-commit
> enabled, I don't know how JPA/JDO really work).
> That commit triggers validation, and the ConstraintViolationException is
> shadowing the RequestFactory response (which, if
> ReflectiveServiceLayer#validate behaved expectedly, would be an
> onConstraintViolations response)
>
OK .... I see ... YOU ARE RIGHT.
I have tested it using: <property name="datanucleus.NontransactionalWrite"
value="false"/> I have expected this to prevent non-transactional write as
you mentioned.
I am getting the following error which lets me think that requestfactory is
trying to "auto-comit" data into the DB on its own!!
*Am I missing some configurations on GWT level??*
SEVERE: Server error caused
by:org.datanucleus.exceptions.NucleusUserException
*Cant write fields outside of transactions. You may want to set
'NontransactionalWrite=true'.*
org.datanucleus.exceptions.NucleusUserException: Cant write fields outside
of transactions. You may want to set 'NontransactionalWrite=true'.
at
org.datanucleus.api.jpa.state.PersistentNontransactional.transitionWriteField(PersistentNontransactional.java:170)
at
org.datanucleus.state.AbstractStateManager.transitionWriteField(AbstractStateManager.java:871)
at
org.datanucleus.state.JDOStateManager.preWriteField(JDOStateManager.java:3575)
at
org.datanucleus.state.AbstractStateManager.setStringField(AbstractStateManager.java:1998)
at
com.emajstor.server.persistence.TestEntity.jdoSetmyEmailAddress(TestEntity.java)
at
com.emajstor.server.persistence.TestEntity.setMyEmailAddress(TestEntity.java:88)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:115)
at
com.google.web.bindery.requestfactory.server.ReflectiveServiceLayer.setProperty(ReflectiveServiceLayer.java:234)
at
com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.setProperty(ServiceLayerDecorator.java:193)
at
com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.setProperty(ServiceLayerDecorator.java:193)
at
com.google.web.bindery.requestfactory.server.SimpleRequestProcessor$1.visitValueProperty(SimpleRequestProcessor.java:549)
at
com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties(ProxyAutoBean.java:289)
at
com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse(AbstractAutoBean.java:166)
at
com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.accept(AbstractAutoBean.java:101)
at
com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.processOperationMessages(SimpleRequestProcessor.java:524)
at
com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:218)
at
com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:135)
at
com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost(RequestFactoryServlet.java:133)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at
com.emajstor.server.AppHandlerFilter.doFilter(AppHandlerFilter.java:72)
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:63)
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$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.DevAppServerServersFilter.doDirectRequest(DevAppServerServersFilter.java:369)
at
com.google.appengine.tools.development.DevAppServerServersFilter.doDirectServerRequest(DevAppServerServersFilter.java:352)
at
com.google.appengine.tools.development.DevAppServerServersFilter.doFilter(DevAppServerServersFilter.java:115)
at
org.mortbay.jetty.servlet.ServletHandler$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:97)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at
com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:480)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$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)
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