У меня возникли проблемы с использованием постоянства в моем проекте jBPM.

Моя конфигурация - jBPM 5.4 + Hibernate + JPA 2, и в настоящее время я настраиваю поток процессов для постоянного подключения к БД через persistence.xml. Я просто пытаюсь соединить источник данных по умолчанию (на сервере H2) с моим персонализированным persistence.xml, но постоянно получаю одну и ту же ошибку:

Unknown entity: org.jbpm.persistence.processinstance.ProcessInstanceInfo

Я вручную добавил в свою папку src / META-INF файл JBPMorm-JPA2.xml следующего содержания, но ошибка все еще сохраняется. Может кто-нибудь помочь мне?

JBPMorm-JPA2.xml:

<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm orm_2_0.xsd"
                 version="2.0">
      <named-query name="ProcessInstancesWaitingForEvent">
          <query>
select 
    processInstanceInfo.processInstanceId
from 
    ProcessInstanceInfo processInstanceInfo join processInstanceInfo.eventTypes eventTypes
where
    eventTypes = :type
          </query>
      </named-query>

      <!-- ProcessInstanceInfo mapping (needed for JPA 2) -->

      <entity class="org.jbpm.persistence.processinstance.ProcessInstanceInfo"
              metadata-complete="true">
        <pre-update method-name="update" />
        <attributes>
            <id name="processInstanceId">
                <column name="InstanceId" />
                <generated-value strategy="AUTO"/>
            </id>
            <basic name="processId" access="FIELD" />
            <basic name="startDate" access="FIELD" >
                <temporal>DATE</temporal>
            </basic>
            <basic name="lastReadDate" access="FIELD" >
                <temporal>DATE</temporal>
            </basic>
            <basic name="lastModificationDate" access="FIELD" >
                <temporal>DATE</temporal>
            </basic>
            <basic name="state" access="FIELD" />
            <basic name="processInstanceByteArray" access="FIELD" >
                <lob/>
            </basic>
            <version name="version" access="FIELD" >
                <column name="OPTLOCK" />
            </version>
            <element-collection name="eventTypes" target-class="java.lang.String" access="FIELD" >
                <collection-table name="EventTypes">
                    <join-column name="InstanceId"/>
                </collection-table> 
            </element-collection>
            <transient name="processInstance" />
            <transient name="env" />
        </attributes>
      </entity>

</entity-mappings>

persistence.xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence
  version="1.0"
  xsi:schemaLocation=
    "http://java.sun.com/xml/ns/persistence
     http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
     http://java.sun.com/xml/ns/persistence/orm
     http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
  xmlns:orm="http://java.sun.com/xml/ns/persistence/orm"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://java.sun.com/xml/ns/persistence">

  <persistence-unit name="IALPR" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>jdbc/jbpm-ds</jta-data-source>
    <class>org.drools.persistence.info.SessionInfo</class>
    <class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>
    <class>org.drools.persistence.info.WorkItemInfo</class>

    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
      <property name="hibernate.max_fetch_depth" value="3"/>
      <property name="hibernate.hbm2ddl.auto" value="update"/>
      <property name="hibernate.show_sql" value="true"/>
      <property name="hibernate.transaction.manager_lookup_class"
                value="org.hibernate.transaction.BTMTransactionManagerLookup"/>

    </properties>

  </persistence-unit>

</persistence>

ОБНОВИТЬ:

Чтобы решить эту проблему, создайте ProcessInstanceInfo.hbm.xml в папке META-INF со следующим содержимым:

,<?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 package="org.jbpm.persistence.processinstance">

    <!-- access="field" for fields that have no setter methods -->
    <class name="ProcessInstanceInfo" table="ProcessInstanceInfo">

        <id name="processInstanceId" type="long" column="InstanceId">
            <generator class="native" />
        </id>

        <version name="version" type="integer" unsaved-value="null" access="field">
          <column name="OPTLOCK" not-null="false" />
        </version>

        <property name="processId" access="field" />
        <property name="startDate" type="timestamp" access="field" />
        <property name="lastReadDate" type="timestamp"  access="field" />
        <property name="lastModificationDate" type="timestamp" access="field" />
        <property name="state" type="integer" not-null="true" access="field" />

       <property name="processInstanceByteArray" type="org.hibernate.type.PrimitiveByteArrayBlobType" 
            column="processInstanceByteArray" access="field" length="2147483647" />

        <set name="eventTypes" table="EventTypes" access="field" >
            <key column="InstanceId"/>
            <element column="element" type="string"/>
        </set>

        <!-- NOT mapping [processInstance] field because field is transient -->    
        <!-- NOT mapping [env] field because field is transient -->    

    </class>

</hibernate-mapping>

Если кто-нибудь знает хороший учебник по настройке сохранения для jBPM5, пожалуйста, поделитесь ... это безумие!