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Posted to users@openjpa.apache.org by Russell Collins <Ru...@mclaneat.com> on 2009/05/20 02:15:21 UTC
Date Problem
Hello, I am new to OpenJPA and the entire persistence objects so bear with me a little. First of all, I am using Apache Geronimo which has OpenJPA version1.2.1 and I am moving from Hibernate (which is a pain to try to work in Geronimo). Everything works fine except for Dates and Times. I have an Embedded class that starts off like this:
@Embeddable
public class EntityChange implements Serializable {
private static final long serialVersionUID = 1L;
@Column(name = "changedate" )
@Temporal(DATE)
private Date changeDate;
@Column(name = "changetime")
@Temporal(TIME)
private Time changeTime;
@Column(name = "changeuser")
private String changeUser;
When I try to grab an object with these embedded values I get the error:
java.lang.AssertionError: javax.ejb.EJBException: Unknown Container Exception: java.rmi.RemoteException: Cannot read the response from the server. The class for an object being returned is not located in this system:; nested exception is:
java.lang.ClassNotFoundException: org.apache.openjpa.util.java$sql$Date$proxy
I have tried multiple ways with adding and removing @Temporal etc. Oh one more thing, this is a MySQL database that I am trying to access. Please give me any help you can. Thanks.
Russell Collins
RE: Date Problem
Posted by Russell Collins <Ru...@mclaneat.com>.
Thanks Mike. I included openjpa-1.2.1.jar in my client app and everything works great.
Russell Collins
Sr. Software Engineer
McLane Advanced Technology
"Do or do not, there is no try." - Yoda
-----Original Message-----
From: Michael Dick [mailto:michael.d.dick@gmail.com]
Sent: Wednesday, May 20, 2009 9:17 AM
To: users@openjpa.apache.org
Subject: Re: Date Problem
Hi Russell,
I think you're hitting the same problem mentioned here [1]. The short
answer is that the client needs to have access to openjpa-1.2.1.jar so it
can load the proxy classes.
The larger question is whether OpenJPA should (or could) serialize to a
non-proxy type to prevent this problem. I don't see the answer in the
previous thread, but some additonal markmail or nabble searching may find
it.
[1] http://markmail.org/thread/2dmgcbnw6yo7b77n
Hope this helps,
-mike
On Wed, May 20, 2009 at 7:18 AM, is_maximum <mn...@gmail.com> wrote:
>
> Have you tried java.util.Date instead of java.sql.Date ?
>
>
> Russell Collins wrote:
> >
> > Hello, I am new to OpenJPA and the entire persistence objects so bear
> with
> > me a little. First of all, I am using Apache Geronimo which has OpenJPA
> > version1.2.1 and I am moving from Hibernate (which is a pain to try to
> > work in Geronimo). Everything works fine except for Dates and Times. I
> > have an Embedded class that starts off like this:
> >
> >
> > @Embeddable
> > public class EntityChange implements Serializable {
> >
> >
> > private static final long serialVersionUID = 1L;
> >
> > @Column(name = "changedate" )
> > @Temporal(DATE)
> > private Date changeDate;
> >
> > @Column(name = "changetime")
> > @Temporal(TIME)
> > private Time changeTime;
> >
> > @Column(name = "changeuser")
> > private String changeUser;
> >
> >
> > When I try to grab an object with these embedded values I get the error:
> >
> >
> >
> > java.lang.AssertionError: javax.ejb.EJBException: Unknown Container
> > Exception: java.rmi.RemoteException: Cannot read the response from the
> > server. The class for an object being returned is not located in this
> > system:; nested exception is:
> > java.lang.ClassNotFoundException:
> > org.apache.openjpa.util.java$sql$Date$proxy
> >
> > I have tried multiple ways with adding and removing @Temporal etc. Oh
> one
> > more thing, this is a MySQL database that I am trying to access. Please
> > give me any help you can. Thanks.
> >
> >
> > Russell Collins
> >
> >
> >
>
> --
> View this message in context:
> http://n2.nabble.com/Date-Problem-tp2943310p2945766.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>
>
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
>Sorry, I am afraid I cannot.
Without at minimum a snippet of code it's pretty hard to help you out.
- Sorry again, right now detachCopy method of OpenJPAEntityManager can solve
my problem.
> Would you please let me know what bug on detachCopy method?
I'm not sure what you're asking here.
- The question is coming from your response:
"Try changing version="1.0" to version="2.0" and removing don't use the
detachCopy method. I think that this is a bug that I reported [1] a while
back.
[1] https://issues.apache.org/jira/browse/OPENJPA-1672"
> if I get em from jpaTample, and from em find data, do I need always close
em after?
I'm not sure what jpaTample is. You'll need to close your em once you're
done with it. It depends from application to application.
- Right now I close em after I get result back from there.
Thanks,
Jane
Rick Curtis wrote:
>
>>Sorry, I am afraid I cannot.
> Without at minimum a snippet of code it's pretty hard to help you out.
>
>> Would you please let men know what bug on detachCopy method?
> I'm not sure what you're asking here.
>
>> if I get em from jpaTample, and from em find data, do I need always close
> em after?
> I'm not sure what jpaTample is. You'll need to close your em once you're
> done with it. It depends from application to application.
>
> hth,
> Rick
>
>
--
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Re: Date Problem
Posted by Rick Curtis <cu...@gmail.com>.
>Sorry, I am afraid I cannot.
Without at minimum a snippet of code it's pretty hard to help you out.
> Would you please let men know what bug on detachCopy method?
I'm not sure what you're asking here.
> if I get em from jpaTample, and from em find data, do I need always close
em after?
I'm not sure what jpaTample is. You'll need to close your em once you're
done with it. It depends from application to application.
hth,
Rick
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
Hi Rick,
Sorry, I am afraid I cannot. Would you please let men know what bug on
detachCopy method?
And one more question, if I get em from jpaTample, and from em find data, do
I need always close em after?
Thanks,
Jane
--
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Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: Date Problem
Posted by Rick Curtis <cu...@gmail.com>.
Hmm, can you post a small unit test?
Thanks,
Rick
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
Sorry, I mean the entity didn't been detached.
--
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Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
I tried changing version=2.0, and using detach on em, but the entity still
did detached. :(
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="2.0">
This is the only place to change the version, where am I still missing?
Thanks,
Jane
--
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Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: Date Problem
Posted by Rick Curtis <cu...@gmail.com>.
Try changing version="1.0" to version="2.0" and removing don't use the
detachCopy method. I think that this is a bug that I reported [1] a while
back.
Thanks,
Rick
[1] https://issues.apache.org/jira/browse/OPENJPA-1672
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
Thanks Rick for your responding, do you mean there is any configuration in
persistence.xml?
My file is very simple:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="1.0">
<persistence-unit name="PersistenceUnit">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<class>model.Message</class>
<properties>
<property name="openjpa.Log" value="DefaultLevel=TRACE"/>
<!--<property name="openjpa.log" value="DefaultLevel=WARN,
Runtime=INFO, Tool=INFO"/>-->
</properties>
</persistence-unit>
</persistence>
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Re: Date Problem
Posted by Rick Curtis <cu...@gmail.com>.
Can you post your persistence.xml file?
Thanks,
Rick
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
Hi Rick,
I solved this problem by casting the EntityManger to OpenJPAEntityManager
and using detachCpoy method which it return detached entity. Properly detach
method is a bug need fix.
Thanks,
Jane
--
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Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
Thank you for quick responding. I am using openjpa 2.0.0, the latest version.
--
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Re: Date Problem
Posted by Rick Curtis <cu...@gmail.com>.
What version of OpenJPA are you on?
Thanks,
Rick
Re: Date Problem
Posted by jingmeifan <ja...@hotmail.com>.
I have the same problem and try many ways still stuck in the Date type, the
object data cannot be send out due to
org.apache.openjpa.util.java$util$Date$proxy, both detach() and clear() are
not working for me. How can I get rid of this type?
Thanks,
Jane
--
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Re: Date Problem
Posted by Kevin Sutter <kw...@gmail.com>.
Just to complete my findings from the earlier post... Here's a reference
[1] to the previous, recent discussion on the detach vs clear processing.
This particular customer problem ended up being a problem with Hessian
serialization, but it still looks like our detachment processing is not the
same between detach and clear.
I also found this unfinished discussion between Pinaki and myself about a
similar situation [2]. I can understand the need to track changes in a
detached state for efficiency reasons. But, this should be configurable.
And, per the earlier comment, we need to be consistent.
I searched for an existing JIRA Issue, and I couldn't find one. So, I
created OPENJPA-1097 [3] to track this problem.
Thanks,
Kevin
[1] http://n2.nabble.com/AutoDetach-td2868435.html#a2884042
[2]
http://n2.nabble.com/Re%3A-Is-java.util.date-not-supported-by-remote-interface---td667769.html#a667769
[3] https://issues.apache.org/jira/browse/OPENJPA-1097
On Wed, May 20, 2009 at 2:46 PM, Michael Dick <mi...@gmail.com>wrote:
> In general I agree, I just sent on the reply from earlier to help Russell
> get going.
>
> Opening a JIRA is a good idea, I think this warrants some further
> investigation and I hadn't noticed the discrepancy between detach() and
> clear()..
>
> -mike
>
> On Wed, May 20, 2009 at 9:49 AM, Kevin Sutter <kw...@gmail.com> wrote:
>
> > Mike,
> > I think that our detached entities should remove any dependencies on
> > OpenJPA
> > binaries. From one of the recent forum postings, it sounds like the
> > detachment works on an individual detach() invocation and not with the
> > clear() invocation (or vice versa -- my memory isn't very good this
> > morning). We need to be consistent and remove this dependency. I
> thought
> > we had a JIRA on this topic, but I can't find that either. Must be
> getting
> > old...
> >
> > Comments?
> > Kevin
> >
> > On Wed, May 20, 2009 at 9:16 AM, Michael Dick <michael.d.dick@gmail.com
> > >wrote:
> >
> > > Hi Russell,
> > >
> > > I think you're hitting the same problem mentioned here [1]. The short
> > > answer is that the client needs to have access to openjpa-1.2.1.jar so
> it
> > > can load the proxy classes.
> > >
> > > The larger question is whether OpenJPA should (or could) serialize to a
> > > non-proxy type to prevent this problem. I don't see the answer in the
> > > previous thread, but some additonal markmail or nabble searching may
> find
> > > it.
> > >
> > > [1] http://markmail.org/thread/2dmgcbnw6yo7b77n
> > >
> > > Hope this helps,
> > >
> > > -mike
> > >
> > > On Wed, May 20, 2009 at 7:18 AM, is_maximum <mn...@gmail.com> wrote:
> > >
> > > >
> > > > Have you tried java.util.Date instead of java.sql.Date ?
> > > >
> > > >
> > > > Russell Collins wrote:
> > > > >
> > > > > Hello, I am new to OpenJPA and the entire persistence objects so
> bear
> > > > with
> > > > > me a little. First of all, I am using Apache Geronimo which has
> > > OpenJPA
> > > > > version1.2.1 and I am moving from Hibernate (which is a pain to try
> > to
> > > > > work in Geronimo). Everything works fine except for Dates and
> Times.
> > > I
> > > > > have an Embedded class that starts off like this:
> > > > >
> > > > >
> > > > > @Embeddable
> > > > > public class EntityChange implements Serializable {
> > > > >
> > > > >
> > > > > private static final long serialVersionUID = 1L;
> > > > >
> > > > > @Column(name = "changedate" )
> > > > > @Temporal(DATE)
> > > > > private Date changeDate;
> > > > >
> > > > > @Column(name = "changetime")
> > > > > @Temporal(TIME)
> > > > > private Time changeTime;
> > > > >
> > > > > @Column(name = "changeuser")
> > > > > private String changeUser;
> > > > >
> > > > >
> > > > > When I try to grab an object with these embedded values I get the
> > > error:
> > > > >
> > > > >
> > > > >
> > > > > java.lang.AssertionError: javax.ejb.EJBException: Unknown Container
> > > > > Exception: java.rmi.RemoteException: Cannot read the response from
> > the
> > > > > server. The class for an object being returned is not located in
> > this
> > > > > system:; nested exception is:
> > > > > java.lang.ClassNotFoundException:
> > > > > org.apache.openjpa.util.java$sql$Date$proxy
> > > > >
> > > > > I have tried multiple ways with adding and removing @Temporal etc.
> > Oh
> > > > one
> > > > > more thing, this is a MySQL database that I am trying to access.
> > > Please
> > > > > give me any help you can. Thanks.
> > > > >
> > > > >
> > > > > Russell Collins
> > > > >
> > > > >
> > > > >
> > > >
> > > > --
> > > > View this message in context:
> > > > http://n2.nabble.com/Date-Problem-tp2943310p2945766.html
> > > > Sent from the OpenJPA Users mailing list archive at Nabble.com.
> > > >
> > > >
> > >
> >
>
Re: Date Problem
Posted by Michael Dick <mi...@gmail.com>.
In general I agree, I just sent on the reply from earlier to help Russell
get going.
Opening a JIRA is a good idea, I think this warrants some further
investigation and I hadn't noticed the discrepancy between detach() and
clear()..
-mike
On Wed, May 20, 2009 at 9:49 AM, Kevin Sutter <kw...@gmail.com> wrote:
> Mike,
> I think that our detached entities should remove any dependencies on
> OpenJPA
> binaries. From one of the recent forum postings, it sounds like the
> detachment works on an individual detach() invocation and not with the
> clear() invocation (or vice versa -- my memory isn't very good this
> morning). We need to be consistent and remove this dependency. I thought
> we had a JIRA on this topic, but I can't find that either. Must be getting
> old...
>
> Comments?
> Kevin
>
> On Wed, May 20, 2009 at 9:16 AM, Michael Dick <michael.d.dick@gmail.com
> >wrote:
>
> > Hi Russell,
> >
> > I think you're hitting the same problem mentioned here [1]. The short
> > answer is that the client needs to have access to openjpa-1.2.1.jar so it
> > can load the proxy classes.
> >
> > The larger question is whether OpenJPA should (or could) serialize to a
> > non-proxy type to prevent this problem. I don't see the answer in the
> > previous thread, but some additonal markmail or nabble searching may find
> > it.
> >
> > [1] http://markmail.org/thread/2dmgcbnw6yo7b77n
> >
> > Hope this helps,
> >
> > -mike
> >
> > On Wed, May 20, 2009 at 7:18 AM, is_maximum <mn...@gmail.com> wrote:
> >
> > >
> > > Have you tried java.util.Date instead of java.sql.Date ?
> > >
> > >
> > > Russell Collins wrote:
> > > >
> > > > Hello, I am new to OpenJPA and the entire persistence objects so bear
> > > with
> > > > me a little. First of all, I am using Apache Geronimo which has
> > OpenJPA
> > > > version1.2.1 and I am moving from Hibernate (which is a pain to try
> to
> > > > work in Geronimo). Everything works fine except for Dates and Times.
> > I
> > > > have an Embedded class that starts off like this:
> > > >
> > > >
> > > > @Embeddable
> > > > public class EntityChange implements Serializable {
> > > >
> > > >
> > > > private static final long serialVersionUID = 1L;
> > > >
> > > > @Column(name = "changedate" )
> > > > @Temporal(DATE)
> > > > private Date changeDate;
> > > >
> > > > @Column(name = "changetime")
> > > > @Temporal(TIME)
> > > > private Time changeTime;
> > > >
> > > > @Column(name = "changeuser")
> > > > private String changeUser;
> > > >
> > > >
> > > > When I try to grab an object with these embedded values I get the
> > error:
> > > >
> > > >
> > > >
> > > > java.lang.AssertionError: javax.ejb.EJBException: Unknown Container
> > > > Exception: java.rmi.RemoteException: Cannot read the response from
> the
> > > > server. The class for an object being returned is not located in
> this
> > > > system:; nested exception is:
> > > > java.lang.ClassNotFoundException:
> > > > org.apache.openjpa.util.java$sql$Date$proxy
> > > >
> > > > I have tried multiple ways with adding and removing @Temporal etc.
> Oh
> > > one
> > > > more thing, this is a MySQL database that I am trying to access.
> > Please
> > > > give me any help you can. Thanks.
> > > >
> > > >
> > > > Russell Collins
> > > >
> > > >
> > > >
> > >
> > > --
> > > View this message in context:
> > > http://n2.nabble.com/Date-Problem-tp2943310p2945766.html
> > > Sent from the OpenJPA Users mailing list archive at Nabble.com.
> > >
> > >
> >
>
Re: Date Problem
Posted by Kevin Sutter <kw...@gmail.com>.
Mike,
I think that our detached entities should remove any dependencies on OpenJPA
binaries. From one of the recent forum postings, it sounds like the
detachment works on an individual detach() invocation and not with the
clear() invocation (or vice versa -- my memory isn't very good this
morning). We need to be consistent and remove this dependency. I thought
we had a JIRA on this topic, but I can't find that either. Must be getting
old...
Comments?
Kevin
On Wed, May 20, 2009 at 9:16 AM, Michael Dick <mi...@gmail.com>wrote:
> Hi Russell,
>
> I think you're hitting the same problem mentioned here [1]. The short
> answer is that the client needs to have access to openjpa-1.2.1.jar so it
> can load the proxy classes.
>
> The larger question is whether OpenJPA should (or could) serialize to a
> non-proxy type to prevent this problem. I don't see the answer in the
> previous thread, but some additonal markmail or nabble searching may find
> it.
>
> [1] http://markmail.org/thread/2dmgcbnw6yo7b77n
>
> Hope this helps,
>
> -mike
>
> On Wed, May 20, 2009 at 7:18 AM, is_maximum <mn...@gmail.com> wrote:
>
> >
> > Have you tried java.util.Date instead of java.sql.Date ?
> >
> >
> > Russell Collins wrote:
> > >
> > > Hello, I am new to OpenJPA and the entire persistence objects so bear
> > with
> > > me a little. First of all, I am using Apache Geronimo which has
> OpenJPA
> > > version1.2.1 and I am moving from Hibernate (which is a pain to try to
> > > work in Geronimo). Everything works fine except for Dates and Times.
> I
> > > have an Embedded class that starts off like this:
> > >
> > >
> > > @Embeddable
> > > public class EntityChange implements Serializable {
> > >
> > >
> > > private static final long serialVersionUID = 1L;
> > >
> > > @Column(name = "changedate" )
> > > @Temporal(DATE)
> > > private Date changeDate;
> > >
> > > @Column(name = "changetime")
> > > @Temporal(TIME)
> > > private Time changeTime;
> > >
> > > @Column(name = "changeuser")
> > > private String changeUser;
> > >
> > >
> > > When I try to grab an object with these embedded values I get the
> error:
> > >
> > >
> > >
> > > java.lang.AssertionError: javax.ejb.EJBException: Unknown Container
> > > Exception: java.rmi.RemoteException: Cannot read the response from the
> > > server. The class for an object being returned is not located in this
> > > system:; nested exception is:
> > > java.lang.ClassNotFoundException:
> > > org.apache.openjpa.util.java$sql$Date$proxy
> > >
> > > I have tried multiple ways with adding and removing @Temporal etc. Oh
> > one
> > > more thing, this is a MySQL database that I am trying to access.
> Please
> > > give me any help you can. Thanks.
> > >
> > >
> > > Russell Collins
> > >
> > >
> > >
> >
> > --
> > View this message in context:
> > http://n2.nabble.com/Date-Problem-tp2943310p2945766.html
> > Sent from the OpenJPA Users mailing list archive at Nabble.com.
> >
> >
>
Re: Date Problem
Posted by Michael Dick <mi...@gmail.com>.
Hi Russell,
I think you're hitting the same problem mentioned here [1]. The short
answer is that the client needs to have access to openjpa-1.2.1.jar so it
can load the proxy classes.
The larger question is whether OpenJPA should (or could) serialize to a
non-proxy type to prevent this problem. I don't see the answer in the
previous thread, but some additonal markmail or nabble searching may find
it.
[1] http://markmail.org/thread/2dmgcbnw6yo7b77n
Hope this helps,
-mike
On Wed, May 20, 2009 at 7:18 AM, is_maximum <mn...@gmail.com> wrote:
>
> Have you tried java.util.Date instead of java.sql.Date ?
>
>
> Russell Collins wrote:
> >
> > Hello, I am new to OpenJPA and the entire persistence objects so bear
> with
> > me a little. First of all, I am using Apache Geronimo which has OpenJPA
> > version1.2.1 and I am moving from Hibernate (which is a pain to try to
> > work in Geronimo). Everything works fine except for Dates and Times. I
> > have an Embedded class that starts off like this:
> >
> >
> > @Embeddable
> > public class EntityChange implements Serializable {
> >
> >
> > private static final long serialVersionUID = 1L;
> >
> > @Column(name = "changedate" )
> > @Temporal(DATE)
> > private Date changeDate;
> >
> > @Column(name = "changetime")
> > @Temporal(TIME)
> > private Time changeTime;
> >
> > @Column(name = "changeuser")
> > private String changeUser;
> >
> >
> > When I try to grab an object with these embedded values I get the error:
> >
> >
> >
> > java.lang.AssertionError: javax.ejb.EJBException: Unknown Container
> > Exception: java.rmi.RemoteException: Cannot read the response from the
> > server. The class for an object being returned is not located in this
> > system:; nested exception is:
> > java.lang.ClassNotFoundException:
> > org.apache.openjpa.util.java$sql$Date$proxy
> >
> > I have tried multiple ways with adding and removing @Temporal etc. Oh
> one
> > more thing, this is a MySQL database that I am trying to access. Please
> > give me any help you can. Thanks.
> >
> >
> > Russell Collins
> >
> >
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Re: Date Problem
Posted by is_maximum <mn...@gmail.com>.
Have you tried java.util.Date instead of java.sql.Date ?
Russell Collins wrote:
>
> Hello, I am new to OpenJPA and the entire persistence objects so bear with
> me a little. First of all, I am using Apache Geronimo which has OpenJPA
> version1.2.1 and I am moving from Hibernate (which is a pain to try to
> work in Geronimo). Everything works fine except for Dates and Times. I
> have an Embedded class that starts off like this:
>
>
> @Embeddable
> public class EntityChange implements Serializable {
>
>
> private static final long serialVersionUID = 1L;
>
> @Column(name = "changedate" )
> @Temporal(DATE)
> private Date changeDate;
>
> @Column(name = "changetime")
> @Temporal(TIME)
> private Time changeTime;
>
> @Column(name = "changeuser")
> private String changeUser;
>
>
> When I try to grab an object with these embedded values I get the error:
>
>
>
> java.lang.AssertionError: javax.ejb.EJBException: Unknown Container
> Exception: java.rmi.RemoteException: Cannot read the response from the
> server. The class for an object being returned is not located in this
> system:; nested exception is:
> java.lang.ClassNotFoundException:
> org.apache.openjpa.util.java$sql$Date$proxy
>
> I have tried multiple ways with adding and removing @Temporal etc. Oh one
> more thing, this is a MySQL database that I am trying to access. Please
> give me any help you can. Thanks.
>
>
> Russell Collins
>
>
>
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