【整合篇】JBPM4.4与Spring整合
我们大家都知道容器的好处，那么工作流也提供了与spring整合的方式，将工作流引擎由spring容器统一管理起来，共同拥有容器的特性。下面来从代码的角度来看看整合与不整合的对比：
未整合：
引入相应的jar包，使用hibernate来持久化
配置文件：
jbpm.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?> <jbpm-configuration> <import resource="jbpm.default.cfg.xml" /> <import resource="jbpm.businesscalendar.cfg.xml" /> <import resource="jbpm.tx.hibernate.cfg.xml" /> <import resource="jbpm.jpdl.cfg.xml" /> <import resource="jbpm.bpmn.cfg.xml" /> <import resource="jbpm.identity.cfg.xml" /> <!-- Job executor is excluded for running the example test cases. --> <!-- To enable timers and messages in production use, this should be included. --> <!-- <import resource="jbpm.jobexecutor.cfg.xml" /> --> </jbpm-configuration>
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://127.0.0.1/jbpm</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">hejingyuan</property>
<!-- <property name="hibernate.dialect">org.hibernate.dialect.HSQLDialect</property>
<property name="hibernate.connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="hibernate.connection.url">jdbc:hsqldb:mem:.</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password"></property> -->
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="hibernate.format_sql">true</property>
<mapping resource="jbpm.repository.hbm.xml" />
<mapping resource="jbpm.execution.hbm.xml" />
<mapping resource="jbpm.history.hbm.xml" />
<mapping resource="jbpm.task.hbm.xml" />
<mapping resource="jbpm.identity.hbm.xml" />
</session-factory>
</hibernate-configuration>
申请时应用：
ProcessEngine pe = Configuration.getProcessEngine();
TaskService ts = pe.getTaskService();
String taskId = request.getParameter("taskId");
String owner = request.getParameter("owner");
int day = Integer.parseInt(request.getParameter("day"));
String reason = request.getParameter("reason");
Map map = new HashMap();
map.put("day", day);
map.put("reason", reason);
map.put("msg", "<hr>申请人:"+owner+"<br>请假天数:"+day+"<br>请假原因:"+reason);
ts.setVariables(taskId,map);
ts.completeTask(taskId);
response.sendRedirect("index.jsp");
对应的源码：
/** singletone instance */
private static ProcessEngine singleton;
/** get the singleton ProcessEngine that is created from the default
* configuration file 'jbpm.cfg.xml'. */
public static ProcessEngine getProcessEngine() {
if (singleton == null) {
synchronized (Configuration.class) {
if (singleton == null) {
singleton = new Configuration().setResource("jbpm.cfg.xml").buildProcessEngine();
}
}
}
return Configuration.singleton;
}
在jbpm的jar包下，我们可以看到：
这些是jbpm.cfg.xml文件中引入的文件
如何识别的hibernate的配置文件：
整合后：
使用ssh架构：
web.xml文件：
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>SSH</display-name>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 配置Spring的OpenSessionInViewFilter，以解决懒加载异常的问题 -->
<filter>
<filter-name>OpenSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>OpenSessionInViewFilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
<!-- hejingyuan添加 -->
<filter>
<filter-name>SSH</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SSH</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<!-- 结束 -->
<!-- open session in view 的配置-->
<!-- <filter>
<filter-name>openSessionInView</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>sessionFactoryBeanName</param-name>
<param-value>sessionFactory</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>openSessionInView</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> -->
</web-app>
struts.xml配置文件：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<!-- 问题一： namespace="/" 错误，找不到返回值 -->
<!-- 配置为开发模式 -->
<constant name="struts.devMode" value="true" />
<include file="struts-default.xml" />
<package name="hjy" extends="struts-default" namespace="/">
<!-- 审批流转：审批流程管理 -->
<action name="processDefinitionAction_*" class="com.hjy.ssh.action.ProcessDefinitionAction" method="{1}">
<result name="list">/WEB-INF/jsp/definitionFlow/list.jsp</result>
<result name="addUI">/WEB-INF/jsp/definitionFlow/addUI.jsp</result>
<result name="toList" type="redirectAction">processDefinitionAction_list</result>
<!-- 下载专用的结果配置 -->
<result name="downloadProcessImage" type="stream">
<param name="contentType">image/png</param>
<param name="inputName">inputStream</param>
</result>
</action>
<!-- 审批流转：申请流转 -->
<action name="flowAction_*" class="com.hjy.ssh.action.FlowAction" method="{1}">
<result name="submitUI">/WEB-INF/jsp/flowAction/submitUI.jsp</result>
<result name="myApplicationList">/WEB-INF/jsp/flowAction/myApplicationList.jsp</result>
<result name="toMyApplicationList" type="redirectAction">flowAction_myApplicationList</result>
<result name="myTaskList">/WEB-INF/jsp/flowAction/myTaskList.jsp</result>
<result name="approveUI">/WEB-INF/jsp/flowAction/approveUI.jsp</result>
<result name="approveHistory">/WEB-INF/jsp/flowAction/approveHistory.jsp</result>
<result name="toMyTaskList" type="redirectAction">flowAction_myTaskList</result>
<result name="showProcessImageUI"> /WEB-INF/jsp/flowAction/showProcessImageUI.jsp</result>
</action>
<!-- 用户管理 -->
<action name="userAction_*" class="com.hjy.ssh.action.UserAction" method="{1}">
<result name="toIndex" type="redirect">/index.jsp</result>
<result name="loginUI">/WEB-INF/jsp/user/loginUI.jsp</result>
</action>
<!-- 首页 -->
<action name="homeAction_*" class="com.hjy.ssh.action.HomeAction" method="{1}">
<result name="{1}">/WEB-INF/jsp/homeAction/{1}.jsp</result>
</action>
</package>
</struts>
sring的配置文件：applicationContext.xml
<?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"
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/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">
<!-- 自动扫描与装配bean -->
<context:component-scan base-package="com.hjy.ssh"></context:component-scan>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://127.0.0.1/ssh"></property>
<property name="username" value="root"></property>
<property name="password" value="hejingyuan"></property>
</bean>
<!--定义Hibernate的SessionFactory -->
<!-- SessionFactory使用的数据源为上面的数据源 -->
<!-- 指定了Hibernate的映射文件和配置信息 -->
<!-- 配置SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
</bean>
<!-- 配置声明式的事务管理（采用基于注解的方式） -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<!-- more bean definitions go here -->
<!-- 配置ProcessEngine -->
<bean id="springHelper" class="org.jbpm.pvm.internal.processengine.SpringHelper">
<property name="jbpmCfg" value="jbpm.cfg.xml"></property>
</bean>
<bean id="processEngine" factory-bean="springHelper" factory-method="createProcessEngine" />
</beans>
hibernate.cfg.xml：
<?xml version="1.0" encoding="UTF-8"?>
<!-- <!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">-->
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<!-- <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://127.0.0.1/ssh</property>
<property name="connection.username">root</property>
<property name="connection.password">hejingyuan</property> -->
<!-- JDBC connection pool (use the built-in) -->
<!-- <property name="connection.pool_size">1</property> -->
<!-- SQL dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<!-- <property name="current_session_context_class">thread</property> -->
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hibernate.hbm2ddl.auto">update</property>
<mapping resource="com/hjy/ssh/beans/User.hbm.xml"/>
<mapping resource="com/hjy/ssh/beans/Application.hbm.xml"/>
<mapping resource="com/hjy/ssh/beans/ApproveInfo.hbm.xml"/>
<!-- 导入JBPM4.4的映射文件 -->
<mapping resource="jbpm.repository.hbm.xml" />
<mapping resource="jbpm.execution.hbm.xml" />
<mapping resource="jbpm.history.hbm.xml" />
<mapping resource="jbpm.task.hbm.xml" />
<mapping resource="jbpm.identity.hbm.xml" />
</session-factory>
</hibernate-configuration>
jbpm.cfg.xml：
<?xml version="1.0" encoding="UTF-8"?>
<jbpm-configuration>
<import resource="jbpm.default.cfg.xml" />
<import resource="jbpm.businesscalendar.cfg.xml" />
<!--
<import resource="jbpm.tx.hibernate.cfg.xml" />
-->
<!-- 与Spring整合需要导入jbpm.tx.spring.cfg.xml文件 -->
<import resource="jbpm.tx.spring.cfg.xml" />
<import resource="jbpm.jpdl.cfg.xml" />
<import resource="jbpm.bpmn.cfg.xml" />
<import resource="jbpm.identity.cfg.xml" />
</jbpm-configuration>
部署应用：
@Resource
protected ProcessDefinitionService processDefinitionService;
/** 部署 ,即添加一个流程定义（上传png和xml文件）*/
public String add() throws Exception {
ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(upload));
try {
processDefinitionService.deploy(zipInputStream);
} finally {
zipInputStream.close();
}
return "toList";
}
实现类：
@Override
public void deploy(ZipInputStream zipInputStream) {
// 部署流程
processEngine.getRepositoryService()//
.createDeployment()//
.addResourcesFromZipInputStream(zipInputStream)//
.deploy();
}
总结：
以上通过代码的方式展示，主要是让大家更加系统性的来了解工作流的工作原理，而看配置文件也是最简单的一种方式。对于是否与spring或者其他框架整合，相信大家通过做日常项目也能体会到应用框架的优势，以上的对比只是让大家有个直观的认识。