5月份的时候,公司需要开发一个新项目,其中涉及到审批的相关业务流程,我首先到网络上面搜索到了常用的工作流引擎有哪些,我这里不做介绍了,最终选择了activiti工作流引擎。
在工作了7年多的时间里,我从来没有用到过工作流,但是对我们开发者来说,工作流引擎这种技术,只要我们深入研究该工作流引擎的API,也就能够很清楚的去使用工作流引擎了,但是在实际的开发中,业务对接工作流遇到了很多的问题,我都是一个一个的挑灯夜战的去攻关,一个一个去击破,最终把遇到的所有问题都解决了。然后我根据我的想法去封装了这套在业务中需要使用的工作流的体系,下面直接上代码。
第一步,首先项目用的是maven,我们首先引入依赖
<activiti.version>5.18.0</activiti.version>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-engine</artifactId>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-bpmn-model</artifactId>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-bpmn-converter</artifactId>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-process-validation</artifactId>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-spring</artifactId>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-diagram-rest</artifactId>
<version>${activiti.version}</version>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-json-converter</artifactId>
<version>${activiti.version}</version>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-image-generator</artifactId>
<version>${activiti.version}</version>
</dependency>
第二部,添加Spring的配置文件src/main/resources/spring/applicationContext-activiti.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:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- Activiti引擎配置 -->
<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
<property name="dataSource" ref="dataSource" />
<property name="transactionManager" ref="transactionManager" />
<!-- 如果表不存在,就创建表,如果表存在,就直接操作 -->
<property name="databaseSchemaUpdate" value="true" />
<property name="jobExecutorActivate" value="false" />
<property name="deploymentResources" value="classpath*:bpmn/*.bpmn20.xml" />
</bean>
<!-- Activiti引擎工厂 -->
<bean id="processEngineFactory" class="org.activiti.spring.ProcessEngineFactoryBean">
<property name="processEngineConfiguration" ref="processEngineConfiguration" />
</bean>
<!-- Activiti的服务 -->
<bean id="repositoryService" factory-bean="processEngineFactory" factory-method="getRepositoryService" />
<bean id="runtimeService" factory-bean="processEngineFactory" factory-method="getRuntimeService" />
<bean id="formService" factory-bean="processEngineFactory" factory-method="getFormService" />
<bean id="identityService" factory-bean="processEngineFactory" factory-method="getIdentityService" />
<bean id="taskService" factory-bean="processEngineFactory" factory-method="getTaskService" />
<bean id="historyService" factory-bean="processEngineFactory" factory-method="getHistoryService" />
<bean id="managementService" factory-bean="processEngineFactory" factory-method="getManagementService" />
</beans>
第三部,我们创建一个工厂类,把工作流引擎需要用到的service服务引入依赖
import org.activiti.engine.FormService;
import org.activiti.engine.HistoryService;
import or