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Cue
 Post subject: detached objects and duplicate key
PostPosted: Thu Sep 29, 2005 9:08 am 
Regular
Regular

Joined: Tue May 04, 2004 6:15 am
Posts: 51
Hibernate version:
3.0.5

Mapping documents:

OLIPort
Code:
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping
>
    <class
        name="gr.forthnet.enosis.oli.pojos.OLIPort"
        table="ports"
    >

        <id
            name="id"
            column="id"
            type="java.lang.Integer"
        >
            <generator class="increment">
              <!-- 
                  To add non XDoclet generator parameters, create a file named
                  hibernate-generator-params-OLIPort.xml
                  containing the additional parameters and place it in your merge dir.
              -->
            </generator>
        </id>

        <property
            name="code"
            type="java.lang.String"
            update="true"
            insert="true"
            column="code"
        />


         <bag
            name="localizedViews"
            lazy="false"
            inverse="true"
                  cascade="all"                               
        >

            <key
                column="port"
            >
            </key>

            <one-to-many
                  class="gr.forthnet.enosis.oli.pojos.PortLocalization"
            />

      </bag>
   
        <!--
            To add non XDoclet property mappings, create a file named
                hibernate-properties-OLIPort.xml
            containing the additional properties and place it in your merge dir.
        -->

    </class>

</hibernate-mapping>


PortLocalization
Code:
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping
>
    <class
        name="gr.forthnet.enosis.oli.pojos.PortLocalization"
        table="port_localised_details"
            lazy = "false"            
    >

        <id
            name="id"
            column="id"
            type="java.lang.Long"
        >
            <generator class="increment">
              <!-- 
                  To add non XDoclet generator parameters, create a file named
                  hibernate-generator-params-PortLocalization.xml
                  containing the additional parameters and place it in your merge dir.
              -->
            </generator>
        </id>

        <property
            name="name"
            type="java.lang.String"
            update="true"
            insert="true"
            column="name"
        />

        <many-to-one
            name="port"
            class="gr.forthnet.enosis.oli.pojos.OLIPort"
            cascade="save-update"
            update="true"
            insert="true"
            column="port"
                 not-null="true"
        />

        <many-to-one
            name="lang"
            class="gr.forthnet.enosis.oli.pojos.Language"
            cascade="save-update"
            outer-join="auto"
            update="true"
            insert="true"
            column="lang"
                 not-null="true"                              
        />
         
        <!--
            To add non XDoclet property mappings, create a file named
                hibernate-properties-PortLocalization.xml
            containing the additional properties and place it in your merge dir.
        -->

    </class>

</hibernate-mapping>


Code:
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

[b]Language[/b]
<hibernate-mapping
>
    <class
        name="gr.forthnet.enosis.oli.pojos.Language"
        table="languages"
    >

        <id
            name="id"
            column="id"
            type="java.lang.Long"
        >
            <generator class="increment">
              <!-- 
                  To add non XDoclet generator parameters, create a file named
                  hibernate-generator-params-Language.xml
                  containing the additional parameters and place it in your merge dir.
              -->
            </generator>
        </id>

        <property
            name="code"
            type="java.lang.String"
            update="true"
            insert="true"
            column="code"
        />

        <!--
            To add non XDoclet property mappings, create a file named
                hibernate-properties-Language.xml
            containing the additional properties and place it in your merge dir.
        -->

    </class>

</hibernate-mapping>


Code between sessionFactory.openSession() and session.close():
Code:
        OLIPort port = new OLIPort();
        port.setEnglishName("MPLA");
        client.saveOrUpdate(port);


code in setEnglishName(String)
Code:
        PortLocalization view = (PortLocalization)getView(lang);

        if(view == null) {
            view = new PortLocalization(this, lang);
            view.setName(name);                   
            views.add(view);
        }


Full stack trace of any exception that occurs:
Code:
(oli) [16:07:43] ERROR [main] (JDBCExceptionReporter.java:72) - Batch entry 0 insert into languages (code, id) values ( was aborted. Call getNextException() to see the cause.
(oli) [16:07:43]  WARN [main] (JDBCExceptionReporter.java:71) - SQL Error: 0, SQLState: 23505
(oli) [16:07:43] ERROR [main] (JDBCExceptionReporter.java:72) - ERROR: duplicate key violates unique constraint "languages_code_key"

(oli) [16:07:43] ERROR [main] (AbstractFlushingEventListener.java:277) - Could not synchronize database state with session
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:63)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:181)
        at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:74)
        at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:69)
        at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:150)
        at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:1839)
        at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:2200)
        at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:46)
        at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:239)
        at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:223)
        at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:136)
        at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:274)
        at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
        at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:730)
        at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:324)
        at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86)
        at gr.forthnet.services.hibernate.HiberDatabase.commitTrasaction(HiberDatabase.java:158)
        at gr.forthnet.services.hibernate.HiberClient.disconnect(HiberClient.java:90)
        at gr.forthnet.enosis.oli.core.Schedule.synchronize(Schedule.java:84)
        at gr.forthnet.enosis.oli.core.Schedule.main(Schedule.java:212)
Caused by: Batch entry 0 insert into languages (code, id) values ( was aborted. Call getNextException() to see the cause.
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:107)
        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
        at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:57)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:174)
        ... 18 more
(oli) [16:07:43]  WARN [main] (HiberDatabase.java:163) - commit failed, rolling back
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:63)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:181)
        at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:74)
        at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:69)
        at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:150)
        at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:1839)
        at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:2200)
        at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:46)
        at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:239)
        at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:223)
        at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:136)
        at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:274)
        at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
        at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:730)
        at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:324)
        at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86)
        at gr.forthnet.services.hibernate.HiberDatabase.commitTrasaction(HiberDatabase.java:158)
        at gr.forthnet.services.hibernate.HiberClient.disconnect(HiberClient.java:90)
        at gr.forthnet.enosis.oli.core.Schedule.synchronize(Schedule.java:84)
        at gr.forthnet.enosis.oli.core.Schedule.main(Schedule.java:212)
Caused by: Batch entry 0 insert into languages (code, id) values ( was aborted. Call getNextException() to see the cause.
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:107)
        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
        at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:57)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:174)
        ... 18 more



Name and version of the database you are using:
PostgreSQL 7.4


In the constructor of PortLocalization I create a new Language object with the given lang code. The problem as u can understand is that when the cascade is happening, an exception occurs since the lang code is already in the db.

Is there a way to handle situations like these? Doing a search I found out that I have to manually perform a select to check if any row returns and replace the current object. Is there some sort of pattern to handle situations like this?

_________________
eu:life
http://www.eulife.gr

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vgiguere
 Post subject:
PostPosted: Thu Sep 29, 2005 11:12 am 
Senior
Senior

Joined: Tue Feb 08, 2005 5:26 pm
Posts: 157
Location: Montréal, Québec - Canada
I guess the simplest way to avoid this problem is to retrieve the language from the database and assign it to your PortLocalization instead of creating a new one.


Code:
//YOUR BUSINESS CODE

String languageName = "whatever language";
Language language = languageDao.retrieveByName(languageName);
        if(language = null)
            language = new Language(languageName );

PorlLocalization loc = new PortLocatization(language);

//YOUR CONSTRUCTOR

PortLocalization (Language language)
{

//....
}



If you create a new Language, it will always throw an exception because of your constraint.

If you find a more elegant way, let me know. I have not :)

_________________
Vincent Giguère
J2EE Developer

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Cue
 Post subject:
PostPosted: Fri Sep 30, 2005 4:50 am 
Regular
Regular

Joined: Tue May 04, 2004 6:15 am
Posts: 51
vgiguere, thanks a lot for taking the time.

Thats what I thought of doing but its always better to get a second opinion.

Credit!

_________________
eu:life
http://www.eulife.gr

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