Activiti如何与业务代码整合

1、请假流程，activiti 25张表存储流程走到哪一步，请假流程还包括请假当事人，请假内容，请假开始时间，请假结束时间，事由，状态类型由一个请假表存储。两个表关联就是通过businesskey业务主键。需要将请假单的id存入activiti表。

2、act_ru_execution流程实例执行表中间有一个businesskey，存储业务主键。流程实例执行一步，就会里面插入一条数据。

存储businesskey操作如下

package com.xiaofeiyang.activiti;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.runtime.ProcessInstance;

/**
 * @author: yangchun
 * @description:
 * @date: Created in 2020-06-01 16:57
 */
public class BusinessKeyAdd {
    public static void main(String[] args) {
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RuntimeService runtimeService = processEngine.getRuntimeService();
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("myProcess_1","1");
        System.out.println(processInstance.getBusinessKey());
    }
}

 3、流程没有走完的，流程挂起操作，流程废弃的时候使用

package com.xiaofeiyang.activiti;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.ProcessDefinition;

import java.util.Date;
import java.util.List;

/**
 * @author: yangchun
 * @description:
 * @date: Created in 2020-06-03 15:12
 */
public class SuspendActiviti {
    public static void main(String[] args) {
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RepositoryService repositoryService = processEngine.getRepositoryService();
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionKey("myProcess_1")
                .singleResult();
        if(processDefinition.isSuspended()){
            repositoryService.activateProcessDefinitionById(processDefinition.getId(),true,null);
        }else {
            repositoryService.suspendProcessDefinitionById(processDefinition.getId(),true,null);
        }
    }
}

4、因为某些条件导致单个流程实例挂起

package com.xiaofeiyang.activiti;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.runtime.ProcessInstance;

/**
 * @author: yangchun
 * @description:
 * @date: Created in 2020-06-03 15:12
 */
public class SuspendProcessInstance {
    public static void main(String[] args) {
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RuntimeService runtimeService = processEngine.getRuntimeService();
        ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processDefinitionKey("myProcess_1").singleResult();
        if(processInstance.isSuspended()){
            runtimeService.activateProcessInstanceById(processInstance.getId());
        }else {
            runtimeService.suspendProcessInstanceById(processInstance.getId());
        }
    }
}

 5、任务分配

表达式方式进行分配，UEL,统一表达式语言。JavaEE规范，${变量}

package com.xiaofeiyang.activiti;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.runtime.ProcessInstance;

import java.util.HashMap;
import java.util.Map;

/**
 * @author: yangchun
 * @description:
 * @date: Created in 2020-06-01 16:57
 */
public class AssigneeUEL {
    public static void main(String[] args) {
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RuntimeService runtimeService = processEngine.getRuntimeService();
        Map<String,Object> assigned = new HashMap<>();
        assigned.put("assigned0","yangchun");
        assigned.put("assigned1","liujiawei");
        assigned.put("assigned2","xiafeng");
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("assigned","1",assigned);
        System.out.println(processInstance.getBusinessKey());
    }
}

 6、Create任务创建后触发，Assignment，分配后触发，Delete，触发，All所有事件发生触发。在task里面设置tasklistener就行了

package com.xiaofeiyang.activiti;

import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.TaskListener;

/**
 * @author: yangchun
 * @description:
 * @date: Created in 2020-06-06 17:19
 */
public class ActivitiTaskListener implements TaskListener {
    @Override
    public void notify(DelegateTask delegateTask) {
        delegateTask.setAssignee("yangchun");
    }
}

7、查询个人代办任务，包含业务信息

package com.xiaofeiyang.activiti;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;

/**
 * @author: yangchun
 * @description:
 * @date: Created in 2020-06-06 17:27
 */
public class UserTaskQuery {
    public static void main(String[] args) {
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        TaskService taskService = processEngine.getTaskService();
        RuntimeService runtimeService = processEngine.getRuntimeService();
        Task task = taskService.createTaskQuery().processDefinitionKey("assigned")
                .taskAssignee("yangchun").singleResult();
        String processInstanceId = task.getProcessInstanceId();
        ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
        String businessKey = processInstance.getBusinessKey();
        System.out.println(businessKey);
}