JBPM4.2与spring集成

修改jbpm提供的spring.jbpm.cfg.xml，application.xml，jbpm.tx.spring.cfg.xml，jbpm.tx.hibernate.cfg.xml来做spring与jbpm的集成，首先修改jbpm.tx.spring.cfg.xml的名字为jbpm42.spring.cfg.xml讲内容改为

<jbpm-configuration>

	<process-engine-context>
<!--结合jbpm.tx.hibernate.xml-->
		<command-service name="txRequiredCommandService">
			<skip-interceptor />
			<retry-interceptor />
			<environment-interceptor />
<!--使用spring管理transaction-->
			<spring-transaction-interceptor />
		</command-service>

		<command-service name="newTxRequiredCommandService">
			<retry-interceptor />
			<environment-interceptor policy="requiresNew" />
			<spring-transaction-interceptor current="true"/>
		</command-service>
<!--下面为jbpm.default.cfg.xml中的配置，由于jbpm.default.cfg.xml中需要引入jbpm.hibernate.cfg.xml，所以将配置改写到这里，或改jbpm.hibernate.cfg.xml源码，将引入jbpm.hibernate.cfg.xml注掉-->
		<repository-service />
		<repository-cache />
		<execution-service />
		<history-service />
		<management-service />
		<identity-service />
		<task-service />

		<object class="org.jbpm.pvm.internal.id.DatabaseDbidGenerator">
			<field name="commandService">
				<ref object="newTxRequiredCommandService" />
			</field>
		</object>

		<object class="org.jbpm.pvm.internal.id.DatabaseIdComposer"
			init="eager" />

		<script-manager default-expression-language="juel"
			default-script-language="juel">
			<script-language name="juel"
				factory="org.jbpm.pvm.internal.script.JuelScriptEngineFactory" />
		</script-manager>

		<types resource="jbpm.variable.types.xml" />

		<address-resolver />

	</process-engine-context>

	<transaction-context>
<!--强制从当前线程中获取, 删掉了原来的<transaction />-->
		<hibernate-session factory="hibernateSessionFactory"  current="true" />
<!--jbpm.default.cfg.xml中的配置-->
		<repository-session />
    	        <db-session />
   		<message-session />
   	 	<timer-session />
   	 	<history-session />
	</transaction-context>
</jbpm-configuration>

接下来将spring.jbpm.cfg.xml改为

<jbpm-configuration>

  <import resource="jbpm.jpdl.cfg.xml" />
  <import resource="spring/jbpm42.spring.cfg.xml" />
  <import resource="jbpm.identity.cfg.xml" />
  <import resource="jbpm.businesscalendar.cfg.xml" />
  <import resource="jbpm.console.cfg.xml" />
  
<!--  <import resource="jbpm.jobexecutor.cfg.xml" />-->

</jbpm-configuration>

 最后将applicationContext.xml改为

<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:context="http://www.springframework.org/schema/context" 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/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
	default-autowire="byName">

	<context:property-placeholder location="classpath:jdbc.properties" />


	<!-- Configure DB data source -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass">
			<value>${jdbc.driver}</value>
		</property>
		<property name="jdbcUrl">
			<value>${jdbc.url}</value>
		</property>
		<property name="user">
			<value>${jdbc.username}</value>
		</property>
		<property name="password">
			<value>${jdbc.password}</value>
		</property>
		<!--
			<property name="maxActive" value="2" /> <property name="maxIdle"
			value="2" /> <property name="maxWait" value="10000" />
		-->
		<!--连接池中保留的最小连接数。-->
		<property name="minPoolSize">
			<value>5</value>
		</property>
		<property name="maxPoolSize">
			<value>5000</value>
		</property>
		<property name="maxIdleTime">
			<value>60</value>
		</property>
		<property name="idleConnectionTestPeriod">
			<value>60</value>
		</property>
		<property name="acquireIncrement">
			<value>10</value>
		</property>
		<property name="checkoutTimeout">
			<value>0</value>
		</property>
	</bean>

	<!-- Configure hibernate session factory -->
	<bean id="hibernateSessionFactory"
		class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
		<property name="dataSource">
			<ref local="dataSource" />
		</property>
		<property name="hibernateProperties">
			<props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>  
                <prop key="hibernate.cache.use_second_level_cache">true</prop>  
                <prop key="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</prop>  
                <prop key="hibernate.show_sql">false</prop>  
                <prop key="hibernate.format_sql">true</prop>  
            </props>
		</property>
		<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>
	
	<!--  =========jbpm4.2 configuration=========  -->
	<bean id="jbpm4Configuration" class="org.jbpm.pvm.internal.cfg.SpringConfiguration">
		<constructor-arg value="spring/spring.jbpm.cfg.xml" />
	</bean>

	<bean id="processEngine" factory-bean="jbpm4Configuration" factory-method="buildProcessEngine" />

	<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" />
	<bean id="managementService" factory-bean="processEngine" factory-method="getManagementService" />
	<!--  =========jbpm4.2 end=========  -->

	<!-- Transaction management-->
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory">
			<ref local="hibernateSessionFactory" />
		</property>
	</bean>

	<tx:annotation-driven transaction-manager="transactionManager" />

</beans>

 修改完成。

途中出现的错误：

exception while executing command org.jbpm.pvm.internal.cmd.DeployCmd@

java.lang.NullPointerException

开始在网上找原因说是因为少了这么两句：

<deployer-manager>

<jpdl-deployer/>

但我是引入了jbpm.jpdl.cfg.xml的，不需要加这两句，后来跟代码发现repositorySession 为null

是由于没有加入<repository-session />所致。