/** 校验目标节点是否可以回退. */
public boolean validateTargetActivity(String targetActivityId) {
JdbcTemplate jdbcTemplate = ApplicationContextHelper.getBean(JdbcTemplate.class);
String historyTaskId =
jdbcTemplate.queryForObject(
"select id_ from ACT_HI_TASKINST where act_id_=? order by END_TIME_ desc",
String.class,
targetActivityId);
// 先找到历史任务
HistoricTaskInstanceEntity historicTaskInstanceEntity =
Context.getCommandContext()
.getHistoricTaskInstanceEntityManager()
.findHistoricTaskInstanceById(historyTaskId);
// 再反向查找历史任务对应的历史节点
HistoricActivityInstanceEntity historicActivityInstanceEntity =
getHistoricActivityInstanceEntity(historyTaskId);
logger.info("historic activity instance is : {}", historicActivityInstanceEntity.getId());
Graph graph =
new ActivitiHistoryGraphBuilder(historicTaskInstanceEntity.getProcessInstanceId()).build();
Node node = graph.findById(historicActivityInstanceEntity.getId());
if (!this.checkCouldRollback(node)) {
logger.info("cannot rollback {}", taskId);
return false;
}
return true;
}
/** 根据任务历史，创建待办任务. */
public void processHistoryTask(
HistoricTaskInstanceEntity historicTaskInstanceEntity,
HistoricActivityInstanceEntity historicActivityInstanceEntity) {
/*
* historicTaskInstanceEntity.setEndTime(null); historicTaskInstanceEntity.setDurationInMillis(null);
* historicActivityInstanceEntity.setEndTime(null); historicActivityInstanceEntity.setDurationInMillis(null);
*/
// 创建新任务
TaskEntity task = TaskEntity.create(new Date());
task.setProcessDefinitionId(historicTaskInstanceEntity.getProcessDefinitionId());
// task.setId(historicTaskInstanceEntity.getId());
// task.setAssigneeWithoutCascade(historicTaskInstanceEntity.getAssignee());
task.setAssigneeWithoutCascade(this.userId);
task.setParentTaskIdWithoutCascade(historicTaskInstanceEntity.getParentTaskId());
task.setNameWithoutCascade(historicTaskInstanceEntity.getName());
task.setTaskDefinitionKey(historicTaskInstanceEntity.getTaskDefinitionKey());
task.setExecutionId(historicTaskInstanceEntity.getExecutionId());
task.setPriority(historicTaskInstanceEntity.getPriority());
task.setProcessInstanceId(historicTaskInstanceEntity.getProcessInstanceId());
task.setExecutionId(historicTaskInstanceEntity.getExecutionId());
task.setDescriptionWithoutCascade(historicTaskInstanceEntity.getDescription());
task.setTenantId(historicTaskInstanceEntity.getTenantId());
Context.getCommandContext().getTaskEntityManager().insert(task);
// 把流程指向任务对应的节点
ExecutionEntity executionEntity =
Context.getCommandContext()
.getExecutionEntityManager()
.findExecutionById(historicTaskInstanceEntity.getExecutionId());
executionEntity.setActivity(getActivity(historicActivityInstanceEntity));
// 创建HistoricActivityInstance
Context.getCommandContext().getHistoryManager().recordActivityStart(executionEntity);
// 创建HistoricTaskInstance
Context.getCommandContext().getHistoryManager().recordTaskCreated(task, executionEntity);
Context.getCommandContext().getHistoryManager().recordTaskId(task);
// 更新ACT_HI_ACTIVITY里的assignee字段
Context.getCommandContext().getHistoryManager().recordTaskAssignment(task);
try {
// humanTask
this.createHumanTask(task, historicTaskInstanceEntity);
} catch (Exception ex) {
logger.error(ex.getMessage(), ex);
}
}
/**
* 撤销流程.
*
* @return 0-撤销成功 1-流程结束 2-下一结点已经通过,不能撤销
*/
public Integer execute(CommandContext commandContext) {
// 获得历史任务
HistoricTaskInstanceEntity historicTaskInstanceEntity =
Context.getCommandContext()
.getHistoricTaskInstanceEntityManager()
.findHistoricTaskInstanceById(historyTaskId);
// 获得历史节点
HistoricActivityInstanceEntity historicActivityInstanceEntity =
getHistoricActivityInstanceEntity(historyTaskId);
Graph graph =
new ActivitiHistoryGraphBuilder(historicTaskInstanceEntity.getProcessInstanceId()).build();
Node node = graph.findById(historicActivityInstanceEntity.getId());
if (!checkCouldWithdraw(node)) {
logger.info("cannot withdraw {}", historyTaskId);
return 2;
}
// 删除所有活动中的task
this.deleteActiveTasks(historicTaskInstanceEntity.getProcessInstanceId());
// 获得期望撤销的节点后面的所有节点历史
List<String> historyNodeIds = new ArrayList<String>();
this.collectNodes(node, historyNodeIds);
this.deleteHistoryActivities(historyNodeIds);
// 恢复期望撤销的任务和历史
this.processHistoryTask(historicTaskInstanceEntity, historicActivityInstanceEntity);
logger.info("activiti is withdraw {}", historicTaskInstanceEntity.getName());
return 0;
}
public void processHistoryTask(
HistoricTaskInstanceEntity historicTaskInstanceEntity,
HistoricActivityInstanceEntity historicActivityInstanceEntity) {
historicTaskInstanceEntity.setEndTime(null);
historicTaskInstanceEntity.setDurationInMillis(null);
historicActivityInstanceEntity.setEndTime(null);
historicActivityInstanceEntity.setDurationInMillis(null);
TaskEntity task = TaskEntity.create(new Date());
task.setProcessDefinitionId(historicTaskInstanceEntity.getProcessDefinitionId());
task.setId(historicTaskInstanceEntity.getId());
task.setAssigneeWithoutCascade(historicTaskInstanceEntity.getAssignee());
task.setParentTaskIdWithoutCascade(historicTaskInstanceEntity.getParentTaskId());
task.setNameWithoutCascade(historicTaskInstanceEntity.getName());
task.setTaskDefinitionKey(historicTaskInstanceEntity.getTaskDefinitionKey());
task.setExecutionId(historicTaskInstanceEntity.getExecutionId());
task.setPriority(historicTaskInstanceEntity.getPriority());
task.setProcessInstanceId(historicTaskInstanceEntity.getProcessInstanceId());
task.setDescriptionWithoutCascade(historicTaskInstanceEntity.getDescription());
task.setTenantId(historicTaskInstanceEntity.getTenantId());
Context.getCommandContext().getTaskEntityManager().insert(task);
try {
HumanTaskConnector humanTaskConnector =
ApplicationContextHelper.getBean(HumanTaskConnector.class);
// humantask
humanTaskConnector.removeHumanTaskByTaskId(historicTaskInstanceEntity.getId());
this.createHumanTask(task);
} catch (Exception ex) {
logger.error(ex.getMessage(), ex);
}
ExecutionEntity executionEntity =
Context.getCommandContext()
.getExecutionEntityManager()
.findExecutionById(historicTaskInstanceEntity.getExecutionId());
executionEntity.setActivity(getActivity(historicActivityInstanceEntity));
}
/**
* 退回流程.
*
* @return true success, false failure
*/
public Boolean execute(CommandContext commandContext) {
// 初始化当前的起点信息
this.initSource();
// 找到回退的目标节点
String targetActivityId = this.findTargetActivityId();
if (targetActivityId == null) {
logger.info("cannot find targetActivity for : {}", this.taskId);
return Boolean.FALSE;
}
/*
* // 尝试查找最近的上游userTask String historyTaskId = this.findNearestUserTask();
* logger.info("nearest history user task is : {}", historyTaskId);
*
* if (historyTaskId == null) { logger.info("cannot rollback {}", taskId);
*
* return "activity"; }
*/
// 校验这个节点是否可以回退
boolean isValid = this.validateTargetActivity(targetActivityId);
if (!isValid) {
logger.info("cannot rollback for : {} to {}", this.taskId, targetActivityId);
return Boolean.FALSE;
}
JdbcTemplate jdbcTemplate = ApplicationContextHelper.getBean(JdbcTemplate.class);
String historyTaskId =
jdbcTemplate.queryForObject(
"select id_ from ACT_HI_TASKINST where act_id_=? order by END_TIME_ desc",
String.class,
targetActivityId);
HistoricTaskInstanceEntity historicTaskInstanceEntity =
Context.getCommandContext()
.getHistoricTaskInstanceEntityManager()
.findHistoricTaskInstanceById(historyTaskId);
HistoricActivityInstanceEntity historicActivityInstanceEntity =
getHistoricActivityInstanceEntity(historyTaskId);
// 开始回退
if (this.isSameBranch(historicTaskInstanceEntity)) {
// 如果退回的目标节点的executionId与当前task的executionId一样，说明是同一个分支
// 只删除当前分支的task
this.deleteActiveTask();
} else {
// 否则认为是从分支跳回主干
// 删除所有活动中的task
this.deleteActiveTasks(historicTaskInstanceEntity.getProcessInstanceId());
// 获得期望退回的节点后面的所有节点历史
List<String> historyNodeIds = new ArrayList<String>();
Graph graph =
new ActivitiHistoryGraphBuilder(historicTaskInstanceEntity.getProcessInstanceId())
.build();
Node node = graph.findById(historicActivityInstanceEntity.getId());
this.collectNodes(node, historyNodeIds);
this.deleteHistoryActivities(historyNodeIds);
}
// 恢复期望退回的任务和历史
this.processHistoryTask(historicTaskInstanceEntity, historicActivityInstanceEntity);
logger.info("activiti is rollback {}", historicTaskInstanceEntity.getName());
return Boolean.TRUE;
}