Activiti Demo
BPMN
BPMN(Business Process Modeling Notation)是一个重要的工作流建模语言的规范。它利用标准的图元去描述真实的业务发生过程,保证相同的流程在不同的流程引擎得到的执行结果一致。
本demo中业务流程:用户发起请假,然后经理审批,如果请假时间比较短,请假完成,流程结束;如果请假超过3天,转给总经理审批,然后才能请假完成。
用到的BPMN图
activiti配置
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-engine</artifactId>
<version>${activiti-version}</version>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-spring</artifactId>
<version>${activiti-version}</version>
</dependency>
创建数据库
本demo在本地运行,首先需要在本地数据库创建schema(此处为activiti-demo)。
然后运行以下代码,创建activiti引擎需要的25张表(acitivti提供了创建这些表需要的sql,也可以手动创建)
ProcessEngineConfiguration processEngineConfiguration = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();
processEngineConfiguration.setJdbcDriver("com.mysql.jdbc.Driver");
processEngineConfiguration.setJdbcUrl("jdbc:mysql://localhost:3306/activiti-demo?useUnicode=true&characterEncoding=utf8");
processEngineConfiguration.setJdbcUsername("root");
processEngineConfiguration.setJdbcPassword("root");
processEngineConfiguration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
ProcessEngine processEngine = processEngineConfiguration.buildProcessEngine();
System.out.println("processEngine"+processEngine);
部署一个工作流程
ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
@Test
public void startDeployment(){
Deployment deployment = processEngine.getRepositoryService()
.createDeployment()
.addClasspathResource("diagrams/VariableUsersDemo.bpmn")
.addClasspathResource("diagrams/VariableUsersDemo.png")
.deploy();
System.out.println("Deploy deploy ID: " + deployment.getId());
}
png文件可以不添加,只是用作用户查看流程。
开始一个流程实例
public void startProcessInstance(){
String deployKey = "variableProcess";
Map<String,Object> variables = new HashMap<>();
variables.put("user","jianke");
variables.put("manager","caohao");
variables.put("boss","zhangqi");
RuntimeService runtimeService = processEngine.getRuntimeService();
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(deployKey, variables);
String processInstanceID = processInstance.getId();
System.out.println("流程实例ID: " + processInstanceID);
}
variables保存一些该流程需要的变量,此处用来保存了一些人员信息,即何人发起,需要何人进行审批。
user,manager,boss这些字段是在流程图中设置的。
给该实例附加请假信息
TaskService service = processEngine.getTaskService();
List<Task> list = service.createTaskQuery().processInstanceId(processInstanceID).taskCandidateUser("jianke")
.list();
for(Task task:list){
System.out.println("Task ID : " + task.getId() + " " + task.getName());
service.claim(task.getId(),"jianke"); //确定请假任务
Leave leave = new Leave();
leave.setName("jianke");
leave.setContent("Go to Sleep");
leave.setCreateTime(new Date());
leave.setDays(5);
service.setVariable(task.getId(), "info", leave); //添加请假信息
service.complete(task.getId()); //完成请假,提交审批
}
经理审批
List<Task> list = service.createTaskQuery().processInstanceId(processInstanceID).taskCandidateUser("caohao")
.list(); //搜索等待主管处理的任务
for(Task task:list){
System.out.println("Task ID : " + task.getId() + " " + task.getName());
service.claim(task.getId(), "caohao"); //主管接受任务
Leave leave = (Leave)service.getVariable(task.getId(),"info");
Map<String,Object> object = new HashMap<>();
object.put("days", leave.getDays());
service.complete(task.getId(), object); //主管审批,并附带请假天数信息,交给引擎处理是否需要总经理审批
System.out.println("complete!");
}
在BPMN中添加是否总经理审批的判断:
总经理审批
//操作流程同经理审批
TaskService service = processEngine.getTaskService();
List<Task> list = service.createTaskQuery().processInstanceId(processInstanceID).taskCandidateUser("zhangqi")
.list();
for(Task task:list){
System.out.println("Task ID : " + task.getId() + " " + task.getName());
service.claim(task.getId(), "zhangqi");
service.complete(task.getId());
System.out.println("complete!");
}
请假流程完成通知
public class endListener implements ExecutionListener {
@Override
public void notify(DelegateExecution delegateTask){
//在此处进行请假完成后的操作,比较通知请假人,记录档案等
System.out.println("Task End!");
}
}
给结束节点添加通知的方法,在BPMN图中添加:
附上原码地址,大家一起学习探讨:
https://github.com/qixiaojian/activiti-demo.git