首先，確認手邊有一份jbpm3的user guide，有一份還有JBPM3.0源碼的壓縮包
JBPM中是通過org.jbpm.db. JbpmSessionFactory.getInstance()返回一個JbpmSessionFactory實例，
下面通過分析getInstance()的過程，說明怎么設置相關配置文件
1、JbpmSessionFactory.getInstance()方法首先查找類路徑中的jbpm.properties文件
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jbpm.scheduler.service.factory=org.jbpm.scheduler.impl.SchedulerServiceImpl
jbpm.task.instance.class=org.jbpm.taskmgmt.exe.TaskInstance
# uncomment the next line if JbpmSessionFactory.getInstance()
# should lookup the singleton instance from JNDI instead of creating
# a default one.
#
jbpm.session.factory.jndi.name=java:/jbpm/JbpmSessionFactory
# uncomment the next line to use the file system instead of the database for
# storing files related to a process definition
#
# jbpm.files.dir=c:/jbpm.data
# resource path to a properties file that will overwrite all the hibernate
# properties. For database specific builds in db project there is a different
# hibernate.properties file on the classpath for each database. You could change
# the default database for any testing runs by uncommenting the next line and
# adding a hibernate.properties file in the basedir.
#
jbpm.hibernate.cfg.xml=jbpm.hibernate.cfg.xml
jbpm.hibernate.properties=jbpm.hibernate.properties
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找到最基本的設置，jbpm.session.factory.jndi.name=java:/jbpm/JbpmSessionFactory
這行表示從jndi獲取一個JbpmSessionFactory的一個實例，如果你可以用JBPM3 demo中java:/jbpm/JbpmSessionFactory是與DataSource DefaultDS綁定在一起的（在jboss-service.xml中）。要部署在tomcat中，這行必須注釋掉。
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<?xml version="1.0" encoding="UTF-8"?>
<server>
<mbean code="org.jbpm.db.jmx.JbpmService"
name="jboss.jbpm:name=DefaultJbpm,service=JbpmService"
description="Default jBPM Service">
<attribute name="JndiName">java:/jbpm/JbpmSessionFactory</attribute>
<depends>jboss.jca:service=DataSourceBinding,name=DefaultDS</depends>
</mbean>
</server>
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jboss-service.xml文件內容，如果你用源碼包成功部署了websale的話，可以在JBOSS_HOME"server"jbpm"deploy"jbpm.sar"META-INF"目錄下找到該文件
2、如果getInstance()沒有找到jbpm.session.factory.jndi.name的值，會繼續查找jbpm.hibernate.properties的值，找到jbpm.hibernate.properties的值后，會用該值作為配置文件取創建JbpmSessionFactory
jbpm.hibernate.properties內容：
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hibernate.dialect=org.hibernate.dialect.HSQLDialect
hibernate.connection.datasource=java:/DefaultDS
# hibernate.show_sql=true
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是用DataSource來創建JbpmSessionFactory，DataSource需要在Server.xml中配置，如果你不想配置DataSource的話，把這行也注釋掉
3、上面兩項內容都被注釋掉的話，getInstance()會查找jbpm.hibernate.cfg.xml的值，用該值作為配置文件創建一個JbpmSessionFactory。
說明，這里只是講了怎么配置相關文件，沒有說到怎么部署，關于這方面內容，請參考User Guide chapter 5