package com.cwh.activiti;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.activiti.engine.FormService;
import org.activiti.engine.HistoryService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.history.HistoricActivityInstance;
import org.activiti.engine.impl.RepositoryServiceImpl;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.persistence.entity.TaskEntity;
import org.activiti.engine.impl.pvm.PvmTransition;
import org.activiti.engine.impl.pvm.process.ActivityImpl;
import org.activiti.engine.impl.pvm.process.ProcessDefinitionImpl;
import org.activiti.engine.impl.pvm.process.TransitionImpl;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.apache.commons.lang3.StringUtils;
/**
* 流程操作核心类<br>
* 此核心类主要处理：驳回流程、取回流程、清空指定活动节点流向 、提交流程/流程转向、中止流程(特权人直接审批通过等)、挂起等核心操作<br>
*
*
*/
public class ProcessCustomService{
private static ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
private static RepositoryService repositoryService = processEngine.getRepositoryService();
private static RuntimeService runtimeService = processEngine.getRuntimeService();
private static TaskService taskService = processEngine.getTaskService();
private static FormService formService = processEngine.getFormService();
private static HistoryService historyService = processEngine.getHistoryService();
/**
* 驳回流程
*
* @param taskId
* 当前任务ID
* @param activityId
* 驳回节点ID
* @param variables
* 流程存储参数
* @throws Exception
*/
public static void backProcess(String taskId, String activityId,
Map<String, Object> variables) throws Exception {
if (StringUtils.isEmpty(activityId)) {
throw new Exception("驳回目标节点ID为空！");
}
// 查找所有并行任务节点，同时驳回
List<Task> taskList = findTaskListByKey(findProcessInstanceByTaskId(
taskId).getId(), findTaskById(taskId).getTaskDefinitionKey());
for (Task task : taskList) {
commitProcess(task.getId(), variables, activityId);
}
}
/**
* 取回流程
*
* @param taskId
* 当前任务ID
* @param activityId
* 取回节点ID
* @throws Exception
*/
public static void callBackProcess(String taskId, String activityId)
throws Exception {
if (StringUtils.isEmpty(activityId)) {
throw new Exception("目标节点ID为空！");
}
// 查找所有并行任务节点，同时取回
List<Task> taskList = findTaskListByKey(findProcessInstanceByTaskId(
taskId).getId(), findTaskById(taskId).getTaskDefinitionKey());
for (Task task : taskList) {
commitProcess(task.getId(), null, activityId);
}
}
/**
* 清空指定活动节点流向
*
* @param activityImpl
* 活动节点
* @return 节点流向集合
*/
private static List<PvmTransition> clearTransition(ActivityImpl activityImpl) {
// 存储当前节点所有流向临时变量
List<PvmTransition> oriPvmTransitionList = new ArrayList<PvmTransition>();
// 获取当前节点所有流向，存储到临时变量，然后清空
List<PvmTransition> pvmTransitionList = activityImpl
.getOutgoingTransitions();
for (PvmTransition pvmTransition : pvmTransitionList) {
oriPvmTransitionList.add(pvmTransition);
}
pvmTransitionList.clear();
return oriPvmTransitionList;
}
/**
* 提交流程/流程转向
* @param taskId
* 当前任务ID
* @param variables
* 流程变量
* @param activityId
* 流程转向执行任务节点ID<br>
* 此参数为空，默认为提交操作
* @throws Exception
*/
private static void commitProcess(String taskId, Map<String, Object> variables,
String activityId) throws Exception {
if (variables == null) {
variables = new HashMap<String, Object>();
}
// 跳转节点为空，默认提交操作
if (StringUtils.isEmpty(activityId)) {
taskService.complete(taskId, variables);
} else {// 流程转向操作
turnTransition(taskId, activityId, variables);
}
}
/**
* 中止流程(特权人直接审批通过等)
*
* @param taskId
*/
public static void endProcess(String taskId) throws Exception {
ActivityImpl endActivity = findActivitiImpl(taskId, "end");
commitProcess(taskId, null, endActivity.getId());
}
/**
* 根据流入任务集合，查询最近一次的流入任务节点
*
* @param processInstance
* 流程实例
* @param tempList
* 流入任务集合
* @return
*/
private static ActivityImpl filterNewestActivity(ProcessInstance processInstance,
List<ActivityImpl> tempList) {
while (tempList.size() > 0) {
ActivityImpl activity_1 = tempList.get(0);
HistoricActivityInstance activityInstance_1 = findHistoricUserTask(
processInstance, activity_1.getId());
if (activityInstance_1 == null) {
tempList.remove(activity_1);
continue;
}
if (tempList.size() > 1) {
ActivityImpl activity_2 = tempList.get(1);
HistoricActivityInstance activityInstance_2 = findHistoricUserTask(
processInstance, activity_2.getId());
if (activityInstance_2 == null) {
tempList.remove(activity_2);
continue;
}
if (activityInstance_1.getEndTime().before(
activityInstance_2.getEndTime())) {
tempList.remove(activity_1);
} else {
tempList.remove(activity_2);
}
} else {
break;
}
}
if (tempList.size() > 0) {
return tempList.get(0);
}
return null;
}
/**
* 根据任务ID和节点ID获取活动节点 <br>
*
* @param taskId
* 任务ID
* @param activityId
* 活动节点ID <br>
* 如果为null或""，则默认查询当前活动节点 <br>
* 如果为"end"，则查询结束节点 <br>
*
* @return
* @throws Exception
*/
private static ActivityImpl findActivitiImpl(String taskId, String activityId)
throws Exception {
// 取得流程定义
ProcessDefinitionEntity processDefinition = findProcessDefinitionEntityByTaskId(taskId);
// 获取当前活动节点ID
if (StringUtils.isEmpty(activityId)) {
activityId = findTaskById(taskId).getTaskDefinitionKey();
}
// 根据流程定义，获取该流程实例的结束节点
if (activityId.toUpperCase().equals("END")) {
for (ActivityImpl activityImpl : processDefinition.getActivities()) {
List<PvmTransition> pvmTransitionList = activityImpl
.getOutgoingTransitions();
if (pvmTransitionList.isEmpty()) {
return activityImpl;
}
}
}
// 根据节点ID，获取对应的活动节点
ActivityImpl activityImpl = ((ProcessDefinitionImpl) processDefinition)
.findActivity(activityId);
return activityImpl;
}
/**
* 根据当前任务ID，查询可以驳回的任务节点
*
* @param taskId
* 当前任务ID
*/
public static List<ActivityImpl> findBackAvtivity(String taskId) throws Exception {
List<ActivityImpl> rtnList = iteratorBackActivity(taskId, findActivitiImpl(taskId,
null), new ArrayList<ActivityImpl>(),
new ArrayList<ActivityImpl>());
return reverList(rtnList);
}
/**
* 查询指定任务节点的最新记录
*
* @param processInstance
* 流程实例
* @param activityId
* @return
*/
private static HistoricActivityInstance findHistoricUserTask(
ProcessInstance processInstance, String activityId) {
HistoricActivityInstance rtnVal = null;
// 查询当前流程实例审批结束的历史节点
List<HistoricActivityInstance> historicActivityInstances = historyService
.createHistoricActivityInstanceQuery().activityType("userTask")
.processInstanceId(processInstance.getId()).activityId(
activityId).finished()
.orderByHistoricActivityInstanceEndTime().desc().list();
if (historicActivityInstances.size() > 0) {
rtnVal = historicActivityInstances.get(0);
}
return rtnVal;
}
/**
* 根据当前节点，查询输出流向是否为并行终点，如果为并行终点，则拼装对应的并行起点ID
*
* @param activityImpl
* 当前节点
* @return
*/
private static String findParallelGatewayId(ActivityImpl activityImpl) {
List<PvmTransition> incomingTransitions = activityImpl
.getOutgoingTransitions();
for (PvmTransition pvmTransition : incomingTransitions) {
TransitionImpl transitionImpl = (TransitionImpl) pvmTransition;
activityImpl = transitionImpl.getDestination();
String type = (String) activityImpl.getProperty("type");
if ("parallelGateway".equals(type)) {// 并行路线
String gatewayId = activityImpl.getId();
String gatewayType = gatewayId.substring(gatewayId
.lastIndexOf("_") + 1);
if ("END".equals(gatewayType.toUpperCase())) {
return gatewayId.substring(0, gatewayId.lastIndexOf("_"))
+ "_start";
}
}
}
return null;
}
/**
* 根据任务ID获取流程定义
*
* @param taskId
* 任务ID
* @return
* @throws Exception
*/
public static ProcessDefinitionEntity findProcessDefinitionEntityByTaskId(
String taskId) throws Exception {
// 取得流程定义
ProcessDefinitionEntity processDefinition = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService)
.getDeployedProcessDefinition(findTaskById(taskId)
.getProcessDefinitionId());
if (processDefinition == null) {
throw new Exception("流程定义未找到!");
}
return processDefinition;
}
/**
* 根据任务ID获取对应的流程实例
*
* @param taskId
* 任务ID
* @return
* @throws Exception
*/
public static ProcessInstance findProcessInstanceByTaskId(String taskId)
throws Exception {
// 找到流程实例
ProcessInstance processInstance = runtimeService
.createProcessInstanceQuery().processInstanceId(
findTaskById(taskId).getProcessInstanceId())
.singleResult();
if (processInstance == null) {
throw new Exception("流程实例未找到!");
}
return processInstance;
}
/**
* 根据任务ID获得任务实例
*
* @param taskId
* 任务ID
* @return
* @throws Exception
*/
private static TaskEntity findTaskById(String taskId) throws Exception {
TaskEntity task = (TaskEntity) taskService.createTaskQuery().taskId(
taskId).singleResult();
if (task == null) {
throw new Exception("任务实例未找到!");
}
return task;
}
/**
* 根据流程实例ID和任务key值查询所有同级任务集合
*
* @param processInstanceId
* @param key
* @return
*/
private static List<Task> findTaskListByKey(String processInstanceId, String key) {
return taskService.createTaskQuery().processInstanceId(
processInstanceId).taskDefinitionKey(key).list();
}
/**
* 迭代循环流程树结构，查询当前节点可驳回的任务节点
*
* @param taskId
* 当前任务ID
* @param currActivity
* 当前活动节点
* @param rtnList
* 存储回退节点集合
* @param tempList
* 临时存储节点集合（存储一次迭代过程中的同级userTask节点）
* @return 回退节点集合
*/
private static List<ActivityImpl> iteratorBackActivity(String taskId,
ActivityImpl currActivity, List<ActivityImpl> rtnList,
List<ActivityImpl> tempList) throws Exception {
// 查询流程定义，生成流程树结构
ProcessInstance processInstance = findProcessInstanceByTaskId(taskId);
// 当前节点的流入来源
List<PvmTransition> incomingTransitions = currActivity
.getIncomingTransitions();
// 条件分支节点集合，userTask节点遍历完毕，迭代遍历此集合，查询条件分支对应的userTask节点
List<ActivityImpl> exclusiveGateways = new ArrayList<ActivityImpl>();
// 并行节点集合，userTask节点遍历完毕，迭代遍历此集合，查询并行节点对应的userTask节点
List<ActivityImpl> parallelGateways = new ArrayList<ActivityImpl>();
// 遍历当前节点所有流入路径
for (PvmTransition pvmTransition : incomingTransitions) {
TransitionImpl transitionImpl = (TransitionImpl) pvmTransition;
ActivityImpl activityImpl = transitionImpl.getSource();
String type = (String) activityImpl.getProperty("type");
/**
* 并行节点配置要求：<br>
* 必须成对出现，且要求分别配置节点ID为:XXX_start(开始)，XXX_end(结束)
*/
if ("parallelGateway".equals(type)) {// 并行路线
String gatewayId = activityImpl.getId();
String gatewayType = gatewayId.substring(gatewayId
.lastIndexOf("_") + 1);
if ("START".equals(gatewayType.toUpperCase())) {// 并行起点，停止递归
return rtnList;
} else {// 并行终点，临时存储此节点，本次循环结束，迭代集合，查询对应的userTask节点
parallelGateways.add(activityImpl);
}
} else if ("startEvent".equals(type)) {// 开始节点，停止递归
return rtnList;
} else if ("userTask".equals(type)) {// 用户任务
tempList.add(activityImpl);
} else if ("exclusiveGateway".equals(type)) {// 分支路线，临时存储此节点，本次循环结束，迭代集合，查询对应的userTask节点
currActivity = transitionImpl.getSource();
exclusiveGateways.add(currActivity);
}
}
/**
* 迭代条件分支集合，查询对应的userTask节点
*/
for (ActivityImpl activityImpl : exclusiveGateways) {
iteratorBackActivity(taskId, activityImpl, rtnList, tempList);
}
/**
* 迭代并行集合，查询对应的userTask节点
*/
for (ActivityImpl activityImpl : parallelGateways) {
iteratorBackActivity(taskId, activityImpl, rtnList, tempList);
}
/**
* 根据同级userTask集合，过滤最近发生的节点
*/
currActivity = filterNewestActivity(processInstance, tempList);
if (currActivity != null) {
// 查询当前节点的流向是否为并行终点，并获取并行起点ID
String id = findParallelGatewayId(currActivity);
if (StringUtils.isEmpty(id)) {// 并行起点ID为空，此节点流向不是并行终点，符合驳回条件，存储此节点
rtnList.add(currActivity);
} else {// 根据并行起点ID查询当前节点，然后迭代查询其对应的userTask任务节点
currActivity = findActivitiImpl(taskId, id);
}
// 清空本次迭代临时集合
tempList.clear();
// 执行下次迭代
iteratorBackActivity(taskId, currActivity, rtnList, tempList);
}
return rtnList;
}
/**
* 还原指定活动节点流向
*
* @param activityImpl
* 活动节点
* @param oriPvmTransitionList
* 原有节点流向集合
*/
private static void restoreTransition(ActivityImpl activityImpl,
List<PvmTransition> oriPvmTransitionList) {
// 清空现有流向
List<PvmTransition> pvmTransitionList = activityImpl
.getOutgoingTransitions();
pvmTransitionList.clear();
// 还原以前流向
for (PvmTransition pvmTransition : oriPvmTransitionList) {
pvmTransitionList.add(pvmTransition);
}
}
/**
* 反向排序list集合，便于驳回节点按顺序显示
*
* @param list
* @return
*/
private static List<ActivityImpl> reverList(List<ActivityImpl> list) {
List<ActivityImpl> rtnList = new ArrayList<ActivityImpl>();
// 由于迭代出现重复数据，排除重复
for (int i = list.size(); i > 0; i--) {
if (!rtnList.contains(list.get(i - 1)))
rtnList.add(list.get(i - 1));
}
return rtnList;
}
/**
* 转办流程
*
* @param taskId
* 当前任务节点ID
* @param userCode
* 被转办人Code
*/
public static void transferAssignee(String taskId, String userCode) {
taskService.setAssignee(taskId, userCode);
}
/**
* 流程转向操作
*
* @param taskId
* 当前任务ID
* @param activityId
* 目标节点任务ID
* @param variables
* 流程变量
* @throws Exception
*/
private static void turnTransition(String taskId, String activityId,
Map<String, Object> variables) throws Exception {
// 当前节点
ActivityImpl currActivity = findActivitiImpl(taskId, null);
// 清空当前流向
List<PvmTransition> oriPvmTransitionList = clearTransition(currActivity);
// 创建新流向
TransitionImpl newTransition = currActivity.createOutgoingTransition();
// 目标节点
ActivityImpl pointActivity = findActivitiImpl(taskId, activityId);
// 设置新流向的目标节点
newTransition.setDestination(pointActivity);
// 执行转向任务
taskService.complete(taskId, variables);
// 删除目标节点新流入
pointActivity.getIncomingTransitions().remove(newTransition);
// 还原以前流向
restoreTransition(currActivity, oriPvmTransitionList);
}
/* public static InputStream getImageStream(String taskId) throws Exception{
ProcessDefinitionEntity pde = findProcessDefinitionEntityByTaskId(taskId);
InputStream imageStream = ProcessDiagramGenerator.generateDiagram(
pde, "png",
runtimeService.getActiveActivityIds(findProcessInstanceByTaskId(taskId).getId()));
return imageStream;
}*/
public static FormService getFormService() {
return formService;
}
public static HistoryService getHistoryService() {
return historyService;
}
public static ProcessEngine getProcessEngine() {
return processEngine;
}
public static RepositoryService getRepositoryService() {
return repositoryService;
}
public static RuntimeService getRuntimeService() {
return runtimeService;
}
public static TaskService getTaskService() {
return taskService;
}
} activiti 快速入门--一个比较不错的操作工具类
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