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From Chris Wolf <cwolf.a...@gmail.com>
Subject Re: cannot persist m2m data, getting "ArgumentException: Attempt to cast instance xxx [java.util.HashSet]" to PersistenceCapable failed. Ensure that it has been enhanced."
Date Mon, 19 Nov 2012 15:59:59 GMT
 José,

Thanks a lot for trying that out, but I am not seeing a problem with
enhancing my entities, as verified
by "javap" - this issue is always complaints about
java.util.ArrayLlist  (or if using sets, java.util.HashSet).

   -Chris

On Mon, Nov 19, 2012 at 10:44 AM, José Luis Cetina <maxtorzito@gmail.com> wrote:
> I copy and paste your 2 clases, and add to my project, then i add in
> persistence.xml and finally i run the enhancement and works:
>
> [openjpa:enhance]
> 108  kx_mailing  INFO   [main] openjpa.Tool - Enhancer running on type
> "mytest.RiskFactor".
> 496  kx_mailing  INFO   [main] openjpa.Tool - Enhancer running on type
> "mytest.MarketData".
>
> Dont forget to add them in your persistence.xml
>
> <class>mytest.RiskFactor</class>
> <class>mytest.MarketData</class>
>
>
> 2012/11/19 Boblitz John <John.Boblitz@bertschi.com>
>
>> Actually, mine works just fine!
>>
>> I choose to annotate the attributes instead of the methodes, but here is
>> an example:
>>
>> @Entity
>> @Table(name = "UserGroup")
>> public class UserGroup extends BaseEntity {
>>
>> [snip]
>>
>>         @ManyToMany(mappedBy = "userGroups")
>>         private Set<Users> users;
>>
>> }
>>
>> @Entity
>> @Table(name = "Users")
>> public class Users extends BaseEntity {
>>
>> [snip]
>>
>>         @ManyToMany
>>         @JoinTable(name = "UserGroupMember", joinColumns =
>> @JoinColumn(name = "userid"), inverseJoinColumns = @JoinColumn(name =
>> "groupid"))
>>         private Set<UserGroup> userGroups;
>>
>> }
>>
>>
>>
>>
>> > -----Ursprüngliche Nachricht-----
>> > Von: Chris Wolf [mailto:cwolf.algo@gmail.com]
>> > Gesendet: Montag, 19. November 2012 16:29
>> > An: users@openjpa.apache.org
>> > Betreff: Re: cannot persist m2m data, getting
>> > "ArgumentException: Attempt to cast instance xxx
>> > [java.util.HashSet]" to PersistenceCapable failed. Ensure
>> > that it has been enhanced."
>> >
>> > José,
>> >
>> > The plugin doc says you can have a comma-delimited list of
>> > classes, however, since enhancement on collection classes
>> > doesn't seem to work anyway - per your suggestion, I removed
>> > "java.util.ArrayList" and re-ran the "mvn openjpa:enhance" command.
>> >
>> > The result, as ever, is still:
>> >
>> > 771  openjpa  INFO   [main] openjpa.Enhance - Creating subclass and
>> > redefining methods for
>> > "[class java.util.ArrayList]". This means that your
>> > application will be less efficient than it would if you ran
>> > the OpenJPA enhancer.
>> > Exception in thread "main" <openjpa-2.2.0-r422266:1244990
>> > fatal user error>
>> > org.apache.openjpa.persistence.ArgumentException: No
>> > registered metadata for type  "class java.util.ArrayList".
>> > This can happen if this class has not been annotated as a
>> > persistent entity or specified in the persistence unit (ex:
>> > in the orm.xml).
>> >
>> > I wonder if anyone knows of a working example of many-to-many
>> > ORM using OpenJPA?
>> >
>> > Thanks,
>> >
>> >    -Chris
>> >
>> >
>> > On Mon, Nov 19, 2012 at 10:19 AM, José Luis Cetina
>> > <maxtorzito@gmail.com> wrote:
>> > > And I think you don't have to set arraylist class or any
>> > java "native"
>> > > class as enhance class. Only your entities have to be enhancement.
>> > > El 19/11/2012 09:12, "José Luis Cetina"
>> > <maxtorzito@gmail.com> escribió:
>> > >
>> > >> I'm not sure if the include tag accept more than 1 class.
>> > >>
>> > >> You have:
>> > >> <includes>**/entities/*.class,java.util.ArrayList.class</includes>
>> > >>
>> > >> Try to remove java.util.ArrayList.
>> > >> El 19/11/2012 09:05, "Chris Wolf" <cwolf.algo@gmail.com> escribió:
>> > >>
>> > >>> José,
>> > >>>
>> > >>> Thanks - I sent the two entities to John (this list).
>> > The pom.xml
>> > >>> is attached...
>> > >>>
>> > >>>     -Chris
>> > >>>
>> > >>>
>> > >>>
>> > >>> On Mon, Nov 19, 2012 at 9:54 AM, José Luis Cetina
>> > >>> <maxtorzito@gmail.com>
>> > >>> wrote:
>> > >>> > Please send your 2 entities and your pom configuration whit
the
>> > >>> > enhance plugin.
>> > >>> > El 19/11/2012 08:46, "Chris Wolf"
>> > <cwolf.algo@gmail.com> escribió:
>> > >>> >
>> > >>> >> José,
>> > >>> >>
>> > >>> >> I tried List/ArrayList - same error.  Thanks....
>> > >>> >>
>> > >>> >>    -Chris
>> > >>> >>
>> > >>> >> On Sun, Nov 18, 2012 at 9:47 PM, José Luis Cetina <
>> > >>> maxtorzito@gmail.com>
>> > >>> >> wrote:
>> > >>> >> > Of course I'm using 1-M relationships but I use them
>> > with List
>> > >>> >> > not
>> > >>> >> hashset,
>> > >>> >> > why you dont give a try to list only for look if
the
>> > problem is
>> > >>> >> > with hashset.
>> > >>> >> > El 18/11/2012 19:59, "Chris Wolf"
>> > <cwolf.algo@gmail.com> escribió:
>> > >>> >> >
>> > >>> >> >> José,
>> > >>> >> >>
>> > >>> >> >> Thanks for your reply.  My pom.xml setup is very
similar to
>> > >>> >> >> yours
>> > >>> and
>> > >>> >> >> the "enhance" goal  runs without error, but,
as I mentioned,
>> > >>> >> >> I still get the error on "casting
>> > java.util.HashSet".   Are you able
>> > >>> >> >> to persist entities with 1-M or M-M relationships?
>> > >>> >> >>
>> > >>> >> >> BTW, I changed my code to temporarily change
JPA
>> > provider from
>> > >>> OpenJPA
>> > >>> >> >> to the Hibernate JPA provider
>> > >>> >> >> and, once again, Hibernate's JPA reports:
>> > >>> >> >>
>> > >>> >> >> Exception in thread "main"
>> > java.lang.IllegalArgumentException:
>> > >>> Unknown
>> > >>> >> >> entity: java.util.HashSet
>> > >>> >> >>         at
>> > >>> >> >>
>> > >>> >>
>> > >>>
>> > org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityMa
>> > >>> nagerImpl.java:671)
>> > >>> >> >>
>> > >>> >> >> Well, at least both JPA implementations are
>> > complaining about
>> > >>> >> >> the
>> > >>> same
>> > >>> >> >> issue - I just wish I knew
>> > >>> >> >> what I was doing!   I know I can get this to
work
>> > in an instant by
>> > >>> >> >> reverting to Hibernate-only
>> > >>> >> >> solution, but I was hoping the byte-code weaving
of
>> > JPA would
>> > >>> >> >> be a performance advantage over Hibernate's
>> > reflection/proxy
>> > >>> >> >> pattern.
>> > >>> >> >>
>> > >>> >> >> Thanks again,
>> > >>> >> >>
>> > >>> >> >>     -Chris
>> > >>> >> >>
>> > >>> >> >> On Sun, Nov 18, 2012 at 1:26 PM, José Luis Cetina
<
>> > >>> maxtorzito@gmail.com
>> > >>> >> >
>> > >>> >> >> wrote:
>> > >>> >> >> > I have this in my pom.xml for ENHANCMENT
and works:
>> > >>> >> >> >
>> > >>> >> >> > <!--OPENJPA ENHANCMENT-->
>> > >>> >> >> >             <plugin>
>> > >>> >> >> >                 <groupId>org.apache.openjpa</groupId>
>> > >>> >> >> >
>> > <artifactId>openjpa-maven-plugin</artifactId>
>> > >>> >> >> >                 <version>2.2.0</version>
>> > >>> >> >> >                 <configuration>
>> > >>> >> >> >
>> > >>> >> >> > <includes>mypackage/model/*.class</includes>
>> > >>> >> >> >
>> > >>> >> <addDefaultConstructor>true</addDefaultConstructor>
>> > >>> >> >> >
>> > >>> >> >> >
>> > <enforcePropertyRestrictions>true</enforcePropertyRestrictio
>> > >>> >> >> > ns>
>> > >>> >> >> >
>> > >>> >> >> >
>> > <connectionDriverName>com.mysql.jdbc.Driver</connectionDriverName>
>> > >>> >> >> >                     <connectionProperties>
>> > >>> >> >> >
>> > driverClass=${database.driver.name},
>> > >>> >> >> >
>> > jdbcUrl=${database.connection.url},
>> > >>> >> >> >                         user=${database.user},
>> > >>> >> >> >                         password=${database.password},
>> > >>> >> >> >                         minPoolSize=5,
>> > >>> >> >> >                         acquireRetryAttempts=3,
>> > >>> >> >> >                         maxPoolSize=20
>> > >>> >> >> >                     </connectionProperties>
>> > >>> >> >> >                 </configuration>
>> > >>> >> >> >                 <executions>
>> > >>> >> >> >                     <execution>
>> > >>> >> >> >                         <id>enhancer</id>
>> > >>> >> >> >                         <phase>process-classes</phase>
>> > >>> >> >> >                         <goals>
>> > >>> >> >> >                             <goal>enhance</goal>
>> > >>> >> >> >                         </goals>
>> > >>> >> >> >                     </execution>
>> > >>> >> >> >                 </executions>
>> > >>> >> >> >                 <dependencies>
>> > >>> >> >> >                     <dependency>
>> > >>> >> >> >
>> > <groupId>org.apache.openjpa</groupId>
>> > >>> >> >> >                         <artifactId>openjpa</artifactId>
>> > >>> >> >> >                         <version>2.2.0</version>
>> > >>> >> >> >                     </dependency>
>> > >>> >> >> >                 </dependencies>
>> > >>> >> >> >             </plugin>
>> > >>> >> >> >
>> > >>> >> >> > In my persistence.xml i have:
>> > >>> >> >> >
>> > >>> >> >> >      <property name="openjpa.ConnectionUserName"
>> > >>> >> value="${db.username}"/>
>> > >>> >> >> >       <property name="openjpa.ConnectionPassword"
>> > >>> >> >> value="${db.password}"/>
>> > >>> >> >> >       <property name="openjpa.ConnectionURL"
>> > value="${db.url}"/>
>> > >>> >> >> >       <property name="openjpa.ConnectionDriverName"
>> > >>> >> >> > value="${db.driver.class}"/>
>> > >>> >> >> >
>> > >>> >> >> > You can replace the database properties
in
>> > persistence.xml
>> > >>> >> >> > with
>> > >>> your
>> > >>> >> own
>> > >>> >> >> > values
>> > >>> (${db.username},${db.password},${db.url},${db.driver.class}).
>> > >>> >> >> >
>> > >>> >> >> >
>> > >>> >> >> > I use this configuration for my JEE Projects.
>> > >>> >> >> >
>> > >>> >> >> > Maybe this can help you.
>> > >>> >> >> >
>> > >>> >> >> > Regards.
>> > >>> >> >> >
>> > >>> >> >> > SCJA. JL Cetina
>> > >>> >> >> >
>> > >>> >> >> >
>> > >>> >> >> > 2012/11/18 Chris Wolf <cwolf.algo@gmail.com>
>> > >>> >> >> >
>> > >>> >> >> >> I wrote a shell script to directly invoke
PCEnhancer on
>> > >>> >> >> >> class java.util.HashSet, and even that
didn't work:
>> > >>> >> >> >>
>> > >>> >> >> >> $ ./enhance.sh
>> > >>> >> >> >> 52  openjpa  INFO   [main] openjpa.Tool
-
>> > Enhancer running on
>> > >>> type
>> > >>> >> >> >> "java.util.HashSet".
>> > >>> >> >> >> Exception in thread "main" java.lang.RuntimeException:
>> > >>> >> >> >> java.io.FileNotFoundExcep
>> > >>> >> >> >> tion:
>> > >>> >> >> >> file:\C:\opt\jdk\jre\lib\rt.jar!\java\util\HashSet.class
>> > >>> (The
>> > >>> >> >> >> filename, directory name, or volume
label syntax
>> > is incorrect)
>> > >>> >> >> >>         at
>> > >>> >> >> >>
>> > >>> >> >>
>> > >>> >>
>> > >>>
>> > org.apache.openjpa.lib.conf.Configurations.launchRunnable(Configurat
>> > >>> ions.java:744)
>> > >>> >> >> >>
>> > >>> >> >> >> On Sun, Nov 18, 2012 at 10:37 AM, Chris
Wolf <
>> > >>> cwolf.algo@gmail.com>
>> > >>> >> >> wrote:
>> > >>> >> >> >> > Hello,
>> > >>> >> >> >> >
>> > >>> >> >> >> > This is my first posting and first
attempt to use
>> > >>> >> >> >> > OpenJPA.  I
>> > >>> put
>> > >>> >> >> >> > together a quick demo and can persist
individual,
>> > >>> >> >> >> > unrelated entities.  However, when
I try to persist
>> > >>> >> >> >> > related entities to two tables
via a link table, i.e.
>> > >>> many-2-many,
>> > >>> >> >> >> > it keeps complaining about "casting
to
>> > >>> >> >> >> > PersistenceCapable", in particular
the class
>> > "java.util.HashSet".
>> > >>> >> >> >> >
>> > >>> >> >> >> > First, I am using the Eclipse JPA
plugin
>> > (called "Dali"
>> > >>> >> >> >> > or "EclipseLink").  Of course,
I have OpenJPA
>> > configured
>> > >>> >> >> >> > as my JPA provider, I am in a plain
Java SE
>> > environment
>> > >>> >> >> >> > with LOCAL_RESOURCE via JDBC connection
>> > properties in the
>> > >>> >> >> >> > persistence.xml.  I am using Sun/Oracle
64bit
>> > >>> >> >> >> > JDK-1.6 and OpenJPA-2.2.0.
>> > >>> >> >> >> >
>> > >>> >> >> >> > I am using the Eclipse JPA plugin
to generate
>> > the entity
>> > >>> classes
>> > >>> >> from
>> > >>> >> >> >> > already-exiting database schema
objects, and that code
>> > >>> >> >> >> > looks like (just pasting the relationship
code),
>> > >>> this
>> > >>> >> >> >> > action also adds these classes
to persistence.xml via
>> > >>> >> >> >> > persistence-unit/class elements.
>> > >>> >> >> >> >
>> > >>> >> >> >> > First M2M entity, "MarketData":
>> > >>> >> >> >> >
>> > >>> >> >> >> >         //bi-directional many-to-many
>> > association to RiskFactor
>> > >>> >> >> >> >         @ManyToMany(mappedBy="marketData")
>> > >>> >> >> >> >         public Set<RiskFactor>
getRiskFactors() {
>> > >>> >> >> >> >                 return this.riskFactors;
>> > >>> >> >> >> >         }
>> > >>> >> >> >> >
>> > >>> >> >> >> > Second M2M entity "RiskFactor":
>> > >>> >> >> >> >
>> > >>> >> >> >> >         //bi-directional many-to-many
>> > association to MarketData
>> > >>> >> >> >> >     @ManyToMany
>> > >>> >> >> >> >         @JoinTable(
>> > >>> >> >> >> >                 name="MARKET_DATA__RISK_FACTOR"
>> > >>> >> >> >> >                 , joinColumns={
>> > >>> >> >> >> >
>> > >>> >> >> >> > @JoinColumn(name="RISK_FACTOR_ID",
>> > >>> >> >> >> nullable=false)
>> > >>> >> >> >> >                         }
>> > >>> >> >> >> >                 , inverseJoinColumns={
>> > >>> >> >> >> >
>> > >>> >> >> >> > @JoinColumn(name="MARKET_DATA_ID",
>> > >>> >> >> >> nullable=false)
>> > >>> >> >> >> >                         }
>> > >>> >> >> >> >                 )
>> > >>> >> >> >> >         public Set<MarketData>
getMarketData() {
>> > >>> >> >> >> >                 return this.marketData;
>> > >>> >> >> >> >         }
>> > >>> >> >> >> >
>> > >>> >> >> >> > When I run the code, the log indicates
implicit runtime
>> > >>> enhacement,
>> > >>> >> >> >> > yet it is complaining:
>> > >>> >> >> >> >
>> > >>> >> >> >> > "[persistdemo.ojpa.entities.RiskFactor@61578aab]
>> > >>> >> [java.util.HashSet]"
>> > >>> >> >> >> > to PersistenceCapable failed. 
Ensure that it has been
>> > >>> enhanced."
>> > >>> >> >> >> >
>> > >>> >> >> >> > ...when it says, "Ensure that it
has been enhanced." -
>> > >>> >> >> >> > which is
>> > >>> >> "it"
>> > >>> >> >> >> > referring to?  The entity "RiskFactor"
or the field
>> > >>> relationship
>> > >>> >> >> >> > field's class, "java.util.HashSet"?
>> > >>> >> >> >> >
>> > >>> >> >> >> >
>> > >>> >> >> >> > 186  openjpa  INFO   [main] openjpa.Runtime
- OpenJPA
>> > >>> dynamically
>> > >>> >> >> >> > loaded the class enhancer. Any
classes that were not
>> > >>> >> >> >> > enhanced
>> > >>> at
>> > >>> >> build
>> > >>> >> >> >> > time will be enhanced when they
are loaded by the JVM.
>> > >>> >> >> >> > SLF4J: Failed to load class
>> > >>> "org.slf4j.impl.StaticLoggerBinder".
>> > >>> >> >> >> > SLF4J: Defaulting to no-operation
(NOP) logger
>> > >>> >> >> >> > implementation
>> > >>> >> >> >> > SLF4J: See
>> > >>> >> >> >> > http://www.slf4j.org/codes.html#StaticLoggerBinderfor
>> > >>> >> >> >> > further details.
>> > >>> >> >> >> > 243  openjpa  INFO   [main] openjpa.Runtime
- OpenJPA
>> > >>> dynamically
>> > >>> >> >> >> > loaded a validation provider.
>> > >>> >> >> >> > 596  openjpa  INFO   [main] openjpa.Runtime
-
>> > Starting OpenJPA
>> > >>> >> 2.2.0
>> > >>> >> >> >> > 630  openjpa  INFO   [main] openjpa.jdbc.JDBC
- Using
>> > >>> dictionary
>> > >>> >> class
>> > >>> >> >> >> > "org.apache.openjpa.jdbc.sql.OracleDictionary".
>> > >>> >> >> >> > Exception in thread "main"
>> > <openjpa-2.2.0-r422266:1244990
>> > >>> nonfatal
>> > >>> >> >> >> > user error>
>> > org.apache.openjpa.persistence.ArgumentException:
>> > >>> >> Attempt
>> > >>> >> >> >> > to cast instance
>> > >>> "[persistdemo.ojpa.entities.RiskFactor@61578aab]
>> > >>> >> >> >> > [java.util.HashSet]" to PersistenceCapable
failed.
>> > >>> >> >> >> > Ensure
>> > >>> that it
>> > >>> >> has
>> > >>> >> >> >> > been enhanced.
>> > >>> >> >> >> >
>> > >>> >> >> >> > Maybe because "java.util.HashSet"
was loaded
>> > before the
>> > >>> >> >> >> > dynamic enhancer could get to it?
>> > >>> >> >> >> >
>> > >>> >> >> >> > Next, I tried performing build-time
enhancement via
>> > >>> >> >> >> > Maven, per
>> > >>> this
>> > >>> >> >> doc:
>> > >>> >> >> >> > http://openjpa.apache.org/enhancement-with-maven.html
>> > >>> >> >> >> >
>> > >>> >> >> >> > When I ran "mvn openjpa:enhance",
it finished with
>> > >>> >> >> >> > success, but
>> > >>> >> none
>> > >>> >> >> >> > of the classes in target/classes
seemed to have be
>> > >>> >> >> >> > changed (last-modified date same
as
>> > compile-time).  and
>> > >>> >> >> >> > re-running
>> > >>> results
>> > >>> >> in
>> > >>> >> >> >> > the same error and stack-trace.
>> > >>> >> >> >> >
>> > >>> >> >> >> > My openjpa:enhance configuration
was:
>> > >>> >> >> >> > <configuration>
>> > >>> >> >> >> >
>> > <includes>**/entities/*.class,java.util.HashSet</includes>
>> > >>> >> >> >> >
>> > <addDefaultConstructor>true</addDefaultConstructor>
>> > >>> >> >> >> >
>> > >>> >>
>> > <enforcePropertyRestrictions>true</enforcePropertyRestrictions>
>> > >>> >> >> >> > </configuration>
>> > >>> >> >> >> >
>> > >>> >> >> >> >
>> > >>> >> >> >> > Next, I tried invoking with:
>> > >>> >> >> >> >
>> > >>> >> >> >> >
>> > -javaagent:/opt/apache-openjpa-2.2.0/openjpa-all-2.2.0.ja
>> > >>> >> >> >> > r
>> > >>> >> >> >> >
>> > >>> >> >> >> > Same error - same stack trace.
>> > >>> >> >> >> >
>> > >>> >> >> >> > Then, I tried setting this property:
>> > >>> >> >> >> > openjpa.RuntimeUnenhancedClasses=supported
>> > >>> >> >> >> >
>> > >>> >> >> >> > Same error - same stack trace.
>> > >>> >> >> >> >
>> > >>> >> >> >> >
>> > >>> >> >> >> > Then, following a suggestion I
found here:
>> > >>> >> >> >> >
>> > >>> >> >> >>
>> > >>> >> >>
>> > >>> >>
>> > >>>
>> > http://openjpa.208410.n2.nabble.com/JPA-adding-entities-to-EntityMan
>> > >>> agerFactory-programmatically-td210697.html
>> > >>> >> >> >> >
>> > >>> >> >> >> > I tried setting both:
>> > >>> >> >> >> > openjpa.RuntimeUnenhancedClasses=supported
>> > >>> >> >> >> > openjpa.MetaDataFactory=jpa(Types=java.util.HashSet)
>> > >>> >> >> >> >
>> > >>> >> >> >> > BTW, this is a dead link
>> > >>> >> >> >> > "User's Guide on Enhancement" /
>> > >>> >> >> >> >
>> > >>> >> >> >>
>> > >>> >> >>
>> > >>> >>
>> > >>>
>> > http://openjpa.apache.org/builds/latest/docs/manual/manual.html#ref_
>> > >>> guide_pc_enhance
>> > >>> >> >> >> > (from page:
>> > >>> >> >> >> > http://openjpa.apache.org/entity-enhancement.html)
>> > >>> >> >> >> >
>> > >>> >> >> >> > So is there any way to use OpenJPA
to persist objects
>> > >>> >> >> >> > related
>> > >>> via a
>> > >>> >> >> >> > link table?  (there obviously must
be, but
>> > it's a total
>> > >>> >> >> >> > mystery to me)  I can't believe
it's this
>> > >>> >> difficult,
>> > >>> >> >> >> > I must be doing something really
dumb.
>> > >>> >> >> >> >
>> > >>> >> >> >> > Regards,
>> > >>> >> >> >> >
>> > >>> >> >> >> > CW
>> > >>> >> >> >>
>> > >>> >> >> >
>> > >>> >> >> >
>> > >>> >> >> >
>> > >>> >> >> > --
>> > >>> >> >> >
>> > >>>
>> > -------------------------------------------------------------------
>> > >>> >> >> > *SCJA. José Luis Cetina*
>> > >>> >> >> >
>> > >>>
>> > -------------------------------------------------------------------
>> > >>> >> >>
>> > >>> >>
>> > >>>
>> > >>
>> >
>>
>
>
>
> --
> -------------------------------------------------------------------
> *SCJA. José Luis Cetina*
> -------------------------------------------------------------------

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