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From José Luis Cetina <maxtorz...@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 02:47:48 GMT
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(AbstractEntityManagerImpl.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</enforcePropertyRestrictions>
> >
> > <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(Configurations.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#StaticLoggerBinder for
> >> > 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.jar
> >> >
> >> > 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-EntityManagerFactory-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*
> > -------------------------------------------------------------------
>

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