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'standalone.xml' DataSource configuration :

                <datasource jndi-name="java:jboss/datasources/jBPMDS" pool-name="jBPMDS" enabled="true" use-java-context="true">

                    <connection-url>jdbc:mysql://localhost:3306/DB_jBPM5_WebApp_Example</connection-url>

                    <driver>mysql</driver>

                    <pool>

                        <max-pool-size>30</max-pool-size>

                    </pool>

                    <security>

                        <user-name>root</user-name>

                        <password>***</password>

                    </security>

                </datasource>

persistence.xml configuration :

<?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="org.jbpm.persistence.jpa" transaction-type="JTA">

        <provider>org.hibernate.ejb.HibernatePersistence</provider>

        <jta-data-source>java:jboss/datasources/jBPMDS</jta-data-source>

              <class>org.drools.persistence.info.SessionInfo</class>

        <class>org.drools.persistence.info.WorkItemInfo</class>

        <class>org.jbpm.process.audit.ProcessInstanceLog</class>

        <class>org.jbpm.process.audit.NodeInstanceLog</class>

        <class>org.jbpm.process.audit.VariableInstanceLog</class>

              <class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>

        <class>org.jbpm.persistence.processinstance.ProcessInstanceEventInfo</class>

        <class>org.jbpm.task.Task</class>

                    <class>org.jbpm.task.Comment</class>

                    <class>org.jbpm.task.Attachment</class>

                    <class>org.jbpm.task.I18NText</class>

                    <class>org.jbpm.task.SubTasksStrategy</class>

                    <class>org.jbpm.task.Deadline</class>

                    <class>org.jbpm.task.Escalation</class>

                    <class>org.jbpm.task.Reassignment</class>

                    <class>org.jbpm.task.Notification</class>

                    <class>org.jbpm.task.BooleanExpression</class>

                    <class>org.jbpm.task.User</class>

                    <class>org.jbpm.task.PeopleAssignments</class>          

        <properties>

            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>

            <property name="hibernate.connection.autocommit" value="true"/>

            <property name="hibernate.max_fetch_depth" value="3"/>

            <property name="hibernate.hbm2ddl.auto" value="update" />

            <property name="hibernate.show_sql" value="false" />

            <!--

            <property name="hibernate.transaction.manager_lookup_class" value=" org.hibernate.transaction.WebSphereExtendedJTATransactionLookup"/>

            -->

        </properties>

    </persistence-unit>

    <persistence-unit name="org.jbpm.task">

        <provider>org.hibernate.ejb.HibernatePersistence</provider>

        <non-jta-data-source>java:jboss/datasources/jBPMDS</non-jta-data-source>

        <class>org.jbpm.task.Attachment</class>

        <class>org.jbpm.task.Content</class>

        <class>org.jbpm.task.BooleanExpression</class>

        <class>org.jbpm.task.Comment</class>

        <class>org.jbpm.task.Deadline</class>

        <class>org.jbpm.task.Delegation</class>

        <class>org.jbpm.task.Escalation</class>

        <class>org.jbpm.task.Group</class>

        <class>org.jbpm.task.I18NText</class>

        <class>org.jbpm.task.Notification</class>

        <class>org.jbpm.task.EmailNotification</class>

        <class>org.jbpm.task.EmailNotificationHeader</class>

        <class>org.jbpm.task.PeopleAssignments</class>

        <class>org.jbpm.task.Reassignment</class>

        <class>org.jbpm.task.Status</class>

        <class>org.jbpm.task.Task</class>

        <class>org.jbpm.task.TaskData</class>

        <class>org.jbpm.task.SubTasksStrategy</class>

        <class>org.jbpm.task.OnParentAbortAllSubTasksEndStrategy</class>

        <class>org.jbpm.task.OnAllSubTasksEndParentEndStrategy</class>

        <class>org.jbpm.task.User</class>

        <class>org.drools.persistence.info.SessionInfo</class>

        <class>org.drools.persistence.info.WorkItemInfo</class>

              <class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>

        <class>org.jbpm.persistence.processinstance.ProcessInstanceEventInfo</class>

        <properties>

            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>

            <property name="hibernate.connection.autocommit" value="true"/>

            <property name="hibernate.max_fetch_depth" value="3"/>

            <property name="hibernate.hbm2ddl.auto" value="update" />

            <property name="hibernate.show_sql" value="false" />

            <!--

            <property name="hibernate.transaction.manager_lookup_class" value=" org.hibernate.transaction.WebSphereExtendedJTATransactionLookup"/>

            -->

        </properties>

    </persistence-unit>

</persistence>