Rick,
I know this is sick and wrong - but I sub-classed java.util.HashSet
such that I was able to enhance that subclass
and used it for my concrete collection field instances.
Basically, I just did this:
@Entity
public class ORMHashSet<E> extends HashSet<E> {/* constructors */}
I finally got rid of that annoying "Attempt to cast instance xxx
[java.util.HashSet]" to PersistenceCapable failed." error,
but now - a new problem (at least it's getting as far as calling
comit() on the EntityManager)
Caused by: org.apache.openjpa.lib.jdbc.ReportingSQLException:
ORA-00942: table or view does not exist
{prepstmnt 617013740 SELECT SEQUENCE_VALUE FROM
OPENJPA_SEQUENCE_TABLE WHERE ID = ? FOR UPDATE [params=?]} [code=942,
state=42000]
Note that my two entities have specifically named @SequenceGenerator,
so this error should not be related to those.
I guess my hack of annotating ORMHashSet as an Entity provoked
generation of some default sequence generator?
I just thought I'd try a few last desperate things before resorting to
going back to using Hibernate... ;)
On Mon, Nov 19, 2012 at 10:34 AM, Rick Curtis <curti...@gmail.com> wrote:
> Chris -
>
> Please post your persistence.xml file also.
>
> Thanks,
> Rick
>
>
> On Mon, Nov 19, 2012 at 9:28 AM, Chris Wolf <cwolf.a...@gmail.com> wrote:
>
>> 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 <maxtorz...@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" <maxtorz...@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.a...@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 <
>> maxtorz...@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.a...@gmail.com> escribió:
>> >>> >
>> >>> >> José,
>> >>> >>
>> >>> >> I tried List/ArrayList - same error. Thanks....
>> >>> >>
>> >>> >> -Chris
>> >>> >>
>> >>> >> On Sun, Nov 18, 2012 at 9:47 PM, José Luis Cetina <
>> >>> maxtorz...@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.a...@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 <
>> >>> maxtorz...@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.a...@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.a...@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*
>> >>> >> >> >
>> >>> -------------------------------------------------------------------
>> >>> >> >>
>> >>> >>
>> >>>
>> >>
>>
>
>
>
> --
> *Rick Curtis*
