jbpm4事务和spring事务的整合
我们知道,支持嵌入到各种架构环境中使用一直是 jbpm工作流引擎的核心竞争力之一,自jbpm3版本开始,jbpm工作流引擎就在很多应用中被集成到spring等架构中使用,从jbpm4.4开始,jbpm工作流引擎可以支持开发者很自然的将其集成到spring架构中使用; spring架构集成jbpm4,只要达成两个目标,就可以基本成功了:
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?1.持久化集成:默认地,jbpm4为每个客户端操作开启一个事务,在此事务中调用服务api,而在通常的spring应用中,应用的访问一般来自web的http请求,然后在此http请求线程中,通过调用spring bean的方法进入事务边界,这与标准的jbpm4事务处理方式是不同的。因此jbpm4提供了相应的工具将自身的持久化事务管理权交给了spring框架
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?2.服务集成: 默认地,jbpm4的客户端通过硬编码获取各种工作流服务接口。现在,需要将这些jbpm4服务接口集成到spring的IOC架构中,作为spring Bean,经由依赖注入等方式供客户端应用调用
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?1.首先需要将jbpm4默认的hibernate事务管理配置替换为spring事务管理配置: jbpm4.4源码中的 'jbpm.tx.spring.cfg.xml'文件复制到工程的src下面,然后在jbpm.cfg.xml中将'<import resource="jbpm.tx.hibernate.cfg.xml" />? '? 修改为'<import resource="jbpm.tx.spring.cfg.xml" />'
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2.然后在spring配置文件的applicationContext.xml文件中,作如下配置:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
?xmlns:tx="http://www.springframework.org/schema/tx"
?xsi:schemaLocation="
???http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
???http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
???http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
?<bean id="propertyConfigurer"
??value="${c3p0.driverClassName}" />
??<property name="jdbcUrl" value="${c3p0.url}" />
??<property name="user" value="${c3p0.username}" />
??<property name="password" value="${c3p0.password}" />
??<property name="checkoutTimeout" value="${c3p0.checkoutTimeout}" />
??<property name="idleConnectionTestPeriod" value="${c3p0.idleConnectionTestPeriod}" />
??<property name="initialPoolSize" value="${c3p0.initialPoolSize}" />
??<property name="maxIdleTime" value="${c3p0.maxIdleTime}" />
??<property name="maxPoolSize" value="${c3p0.maxPoolSize}" />
??<property name="minPoolSize" value="${c3p0.minPoolSize}" />
??<property name="maxStatements" value="${c3p0.maxStatements}" />
??<property name="acquireIncrement" value="${c3p0.acquireIncrement}" />
?</bean>
?<bean id="oracleLobHandle" ref="oracleLobHandle" />
??<property name="dataSource">
?? <ref local="dataSource" />?
??
??</property>
??<property name="hibernateProperties">
???<props>
????<prop key="hibernate.dialect">
?????${hibernate.dialect}
????</prop>
????<prop key="hibernate.show_sql">${showsql}</prop>
???</props>
??</property>
??<property name="mappingDirectoryLocations">
???<list>
????<value>
?????classpath:com/tjtt/tdm/model
????</value>
???</list>
??</property>?
映射jbpm的一些服务,必须要配置
??<property name="mappingResources">??
??????????? <list>??
??????????????? <value>jbpm.repository.hbm.xml</value>????
??????????????? <value>jbpm.execution.hbm.xml</value>????
??????????????? <value>jbpm.history.hbm.xml</value>????
??????????????? <value>jbpm.task.hbm.xml</value>????
??????????????? <value>jbpm.identity.hbm.xml</value>????
??????????? </list>??
??????? </property>
?</bean>
?<bean id="transactionManager"
??ref="sessionFactory" />
?</bean>
?<aop:config>
??<aop:pointcut id="jdbcServiceMethod" expression="execution(* *..service.*Service.*(..))" />
??<aop:advisor pointcut-ref="jdbcServiceMethod" advice-ref="txAdvice" />
?</aop:config>
?<tx:advice id="txAdvice" transaction-manager="transactionManager">
??<tx:attributes>
???<tx:method name="insert*" rollback-for="ServiceException" />
???<tx:method name="save*" rollback-for="ServiceException" />
???<tx:method name="add*" rollback-for="ServiceException" />
???<tx:method name="update*" rollback-for="ServiceException" />
???<tx:method name="del*" rollback-for="ServiceException" />
???<tx:method name="delete*" rollback-for="ServiceException" />
???<tx:method name="remove*" rollback-for="ServiceException" />
???<tx:method name="batchUpdate*" rollback-for="ServiceException" />
???<tx:method name="*" rollback-for="ServiceException" />
??</tx:attributes>
?</tx:advice>
</beans>
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3.在src下面添加 applicationContext-jbpm.xml 文件:配置如下:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
?xmlns:context="http://www.springframework.org/schema/context"
?xsi:schemaLocation="
?http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
?http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">
?<!-- 将ProcessEngine对象交给Spring管理 -->
??<bean id="springHelper" >
?? ??<property name="jbpmCfg" value="jbpm.cfg.xml"></property>
??</bean>
? ?<bean id="processEngine" factory-bean="springHelper" factory-method="createProcessEngine" />
? ?<!-- 各种JBPM服务对象的配置 -->
? ?<bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" />
?<bean id="executionService" factory-bean="processEngine" factory-method="getExecutionService" />
?<bean id="taskService" factory-bean="processEngine" factory-method="getTaskService" />
??<bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService" />
</beans>
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至此,大功告成,jbpm的事务就和spring的事务集成到一起了!