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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 15:19:50 GMT
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(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#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.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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