好的，这里有一个使用 MySQL 数据库和 JBoss AS 在 JBPM 中配置持久性的小教程：
1）在src/main/java文件夹下创建一个META-INF文件夹
2）创建persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:orm="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 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">
<persistence-unit name="your_unit_name" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/your_data_source_name</jta-data-source>
<mapping-file>META-INF/JBPMorm.xml</mapping-file>
<mapping-file>META-INF/ProcessInstanceInfo.hbm.xml</mapping-file>
<!-- The tables that will be created in your specified sql schema -->
<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.default_schema" value="your_schema_name" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="hibernate.connection.autocommit" value="false" />
<property name="hibernate.max_fetch_depth" value="3"/>
<property name="hibernate.hbm2ddl.auto" value="create" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup" />
</properties>
</persistence-unit>
</persistence>
3）创建orm.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_1_0.xsd"
version="1.0">
<named-query name="ProcessInstancesWaitingForEvent">
<query>
select
processInstanceInfo.processInstanceId
from
ProcessInstanceInfo processInstanceInfo
where
:type in elements(processInstanceInfo.eventTypes)
</query>
</named-query>
</entity-mappings>
4）创建ProcessInstanceInfo.hbm.xml
<?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>
5）现在您必须定义您的数据源。我使用 JBoss5，这个版本的 JBoss 将读取任何具有 *-ds.xml 模式的文件作为数据源的定义。您必须将此文件放入部署文件夹中（您可能会注意到那里已经有一个数据源文件，但不会有冲突）。如果您使用 JBoss7，有一种不同的方法来定义 DS - 我想这可能会有所帮助https://community.jboss.org/wiki/DataSourceConfigurationInAS7.
不管怎样，你的 yourDS-ds.xml 应该是这样的：
<datasources>
<local-tx-datasource>
<jndi-name>jdbc/your_datasource_name</jndi-name>
<connection-url>your_db_url</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>your_user</user-name>
<password>your_pass</password>
<min-pool-size>5</min-pool-size>
<max-pool-size>20</max-pool-size>
<idle-timeout-minutes>5</idle-timeout-minutes>
</local-tx-datasource>
</datasources>
6) 上述说明至少足以在数据库中创建持久性表。当您最终开始在 JBPM 中使用任务时，可能需要创建一个 Taskorm.xml 文件（google 一下，它太长了）。我不确定是否有必要，但无论如何我都有。
7) 最后，只需通过 EntityManagerFactory 调用 Java 中的持久性单元，创建环境并启动新会话。持久化数据应该自动保存到DB中。
希望这有帮助。干杯!
