Activiti5 开发介绍1
原文来自：http://blog.csdn.net/m13321169565/article/details/7528280#comments
Activiti5是一款基于java的轻量级工作流引擎。支持BPMN2.0，其依赖的jar非常少，只依赖mybatis。上手迅速，功能丰富，对于一般的工作流应用都可以满足，废话少说，进入正题。
一、搭建开发环境
1、安装jdk5+
2、安装eclipse
3、安装eclipse BPMN designer plugin，地址：http://activiti.org/designer/update/
4、下载Activiti5，地址：http://activiti.org/download.html
5、建立项目，添加jar包：
activation-1.1.jar
activiti-engine-5.9.jar
activiti-spring-5.9-sources.jar
activiti-spring-5.9.jar
aopalliance-1.0.jar
commons-dbcp-1.4.jar
commons-email-1.2.jar
commons-lang-2.4.jar
commons-logging-1.1.1.jar
commons-pool-1.3.jar
livetribe-jsr223-2.0.6.jar
mail-1.4.1.jar
mybatis-3.0.6.jar
spring-aop-3.0.3.RELEASE.jar
spring-asm-3.0.3.RELEASE.jar
spring-beans-3.0.3.RELEASE.jar
spring-context-3.0.3.RELEASE.jar
spring-core-3.0.3.RELEASE.jar
spring-expression-3.0.3.RELEASE.jar
spring-jdbc-3.0.3.RELEASE.jar
spring-orm-3.0.3.RELEASE.jar
spring-test-3.0.3.RELEASE.jar
spring-tx-3.0.3.RELEASE.jar
6、安装数据库，可以选择以下一种，
| Activiti database type | Versions tested | Example JDBC URL | Notes |
|---|---|---|---|
| h2 | 1.2.132 | jdbc:h2:tcp://localhost/activiti | Default configured database |
| mysql | 5.1.11 | jdbc:mysql://localhost:3306/activiti?autoReconnect=true | Tested using mysql-connetor-java database driver |
| oracle | 10.2.0 | jdbc:oracle:thin:@localhost:1521:xe | |
| postgres | 8.4 | jdbc:postgresql://localhost:5432/activiti | |
| db2 | DB2 9.7 using db2jcc4 | jdbc:db2://localhost:50000/activiti | [EXPERIMENTAL] |
| mssql | 2008 using JDBC jtds-1.2.4 | jdbc:jtds:sqlserver://localhost:1433/activiti | [EXPERIMENTAL] |
7、加入相应的数据库驱动jar包，以及数据源支持。
OK，到这里，开发环境已经搭建完成，下面进入开发阶段。
二、开发概述使用Activiti5和Spring集成。
1、编写配置文件，activiti-conf.xml
<span class="tag" style="color: rgb(0, 0, 136);"><beans</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">xmlns</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"http://www.springframework.org/schema/beans"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">xmlns:context</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"http://www.springframework.org/schema/context"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">xmlns:tx</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"http://www.springframework.org/schema/tx"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">xmlns:xsi</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"http://www.w3.org/2001/XMLSchema-instance"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">xsi:schemaLocation</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.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-3.0.xsd"</span><span class="tag" style="color: rgb(0, 0, 136);">></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><bean</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">id</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"dataSource"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">class</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"org.springframework.jdbc.datasource.SimpleDriverDataSource"</span><span class="tag" style="color: rgb(0, 0, 136);">></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"driverClass"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">value</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"org.h2.Driver"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"url"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">value</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"username"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">value</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"sa"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"password"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">value</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"123456"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"></bean></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><bean</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">id</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"transactionManager"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">class</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"org.springframework.jdbc.datasource.DataSourceTransactionManager"</span><span class="tag" style="color: rgb(0, 0, 136);">></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"dataSource"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">ref</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"dataSource"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"></bean></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><bean</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">id</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"processEngineConfiguration"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">class</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"org.activiti.spring.SpringProcessEngineConfiguration"</span><span class="tag" style="color: rgb(0, 0, 136);">></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"dataSource"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">ref</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"dataSource"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"transactionManager"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">ref</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"transactionManager"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"databaseSchemaUpdate"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">value</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"true"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/> <!-- 是否更新数据库结构，如果表不存在，启动时会自动创建 --></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"jobExecutorActivate"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">value</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"false"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/> </span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"></bean></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><bean</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">id</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"processEngine"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">class</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"org.activiti.spring.ProcessEngineFactoryBean"</span><span class="tag" style="color: rgb(0, 0, 136);">></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"><property</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">name</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"processEngineConfiguration"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="atn" style="color: rgb(102, 0, 102);">ref</span><span class="pun" style="color: rgb(102, 102, 0);">=</span><span class="atv" style="color: rgb(0, 136, 0);">"processEngineConfiguration"</span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);">/></span><span class="pln" style="color: rgb(0, 0, 0);"> </span><span class="tag" style="color: rgb(0, 0, 136);"></bean></span><span class="pln" style="color: rgb(0, 0, 0);"> </span>
2、使用BPMN设计器，编写"demo.bpmn20.xml"流程定义文件
3、运行代码：
- public static void main(String args[]) {
- ApplicationContext ctx = new ClassPathXmlApplicationContext("activiti-conf.xml"); //初始化spring上下文
- ProcessEngine processEngine = (ProcessEngine) ctx.getBean("processEngine"); //获得Activiti主接口
- System.out.println("processEngine name :" + processEngine.getName());
- RepositoryService repositoryService = processEngine.getRepositoryService(); //获得资源操作接口
- RuntimeService runtimeService = (RuntimeService) processEngine.getRuntimeService(); //获得运行时操作接口（大多操作流程实例）
- TaskService taskService = processEngine.getTaskService(); //获得任务操作接口
- IdentityService identityService = processEngine.getIdentityService(); //获得身份操作接口（用户和用户组）
- HistoryService historyService = processEngine.getHistoryService(); //获得历史查询接口
- FormService formService = processEngine.getFormService(); //获得表单数据绑定接口
- ManagementService managementService = processEngine.getManagementService(); //获得管理接口
- Deployment deployment = repositoryService.createDeployment().addClasspathResource("demo.bpmn20.xml").deploy();//部署流程定义
- System.out.print("发布流程定义成功！" + " Id=" + deployment.getId() + ", Name=" + deployment.getName());
- }
如果执行成功，说明Activiti已经于spring成功集成。
同时，数据库中会产生相应的表。
4、表说明
RE：RepositoryService接口所操作的表
ACT_RE_DEPLOYMENT部署流程定义时需要被持久化保存下来的信息
ACT_RE_PROCDEF 流程定义数据表
ID：IdentityService接口所操作的表
ACT_ID_INFO 用户扩展信息表
ACT_ID_MEMBERSHIP 用户与分组对应信息表
ACT_ID_GROUP 用户组信息
ACT_ID_USER 用户信息
RU：运行时表 - RuntimeService
ACT_RU_VARIABLE 运行时流程变量表
ACT_RU_TASK 任务节点表
ACT_RU_JOB 定时任务表
ACT_RU_IDENTITYLINK 任务参与者表。主要存储任务节点与参与者的相关信息
ACT_RU_EXECUTION 流程执行路径信息
HI：历史数据表，HistoryService
ACT_HI_PROCINST 历史流程实例表
ACT_HI_ATTACHMENT 历史附件表
ACT_HI_COMMENT 历史注释表
ACT_HI_DETAIL 历史详情表
ACT_HI_TASKINST 历史任务实例表
ACT_HI_ACTINST 历史执行路径信息
GE：全局数据
ACT_GE_BYTEARRAY 二进制数据表：流程定义图片和xml、Serializable的变量
ACT_GE_PROPERTY 属性数据表。存储整个流程引擎级别的数据
注：由于Activiti会在任务或者流程结束时，删除其所在的运行时数据，存入历史数据表。所以保证了运行时表小且快。不会有性能问题。
5、涉及到的名词，对应类，解释
流程定义：ProcessDefinition类，也就是我们用设计器生成的xml文件，Activiti将根据流程定义产生流程实例。
流程实例：ProcessInstance类，是一个完整的流程表示。
流程执行路径：Execution类， 表示流程的执行实例。
任务节点：Task类，有很多这里不一一介绍
参与者：User，参与人
注：如果同一个流程定义被发布多次，那么Activiti将默认采用最新版本。
注： Activiti中关于 流程实例 和 流程执行实例 的区别
ProcessInstance是流程实例，Execution是流程的一个执行实例。一个流程在并发分支的情况下，会产生多个执行实例，一个Execution也可以分出多个Execution。
又有：ProcessInstance extends Execution，说明ProcessInstance也是一个Execution，
Execution的 Parent Execution可能是一个ProcessInstance，所以，在流程没有并发分支的情况下ProcessInstance与Execution是相同的。
三、接口介绍
RepositoryService ：流程定义发布、查询、管理相关操作的接口
未完，待续-----//查询所有已发布信息
List<Deployment> ds = repositoryService.createDeploymentQuery().list();// 查询所有最新版本的流程定义
List<ProcessDefinition> pds = repositoryService.createProcessDefinitionQuery().latestVersion().list();//发布流程定义
DeploymentBuilder builder = repositoryService.createDeployment();
builder = builder.addClasspathResource(definitionResource);
Deployment deployment = builder.deploy();