/// <summary>
///
/// </summary>
/// <param name="event"></param>
public override void OnEvent(IActivitiEvent @event)
{
if (@event is CustomTaskCompletedEntityEventImpl taskEvent)
{
ITaskEntity taskEntity = taskEvent.Entity as ITaskEntity;
ICommandContext commandContext = Context.CommandContext;
IExecutionEntity execution = taskEntity.Execution;
UserTask userTask = execution.CurrentFlowElement as UserTask;
if (userTask.HasMultiInstanceLoopCharacteristics() &&
(taskEntity.IsAppend.GetValueOrDefault(false) ||
taskEntity.IsTransfer.GetValueOrDefault(false)))
{
IExecutionEntity parent = execution.FindMultiInstanceParentExecution();
var collection = userTask.LoopCharacteristics.GetCollectionVarName();
IList <string> users = parent.GetLoopVariable <IList <string> >(collection);
string usr = users.FirstOrDefault(x => x.Equals(taskEntity.Assignee, StringComparison.OrdinalIgnoreCase));
if (usr != null)
{
users.Remove(usr);
parent.SetLoopVariable(collection, users);
}
}
}
}
/// <summary>
/// 循环获取流程实例变量
/// </summary>
/// <typeparam name="T">返回类型</typeparam>
/// <param name="execution">流程实例</param>
/// <param name="variableName">变量名</param>
/// <returns></returns>
internal static T GetLoopVariable <T>(this IExecutionEntity execution, string variableName)
{
object value = execution.GetVariableLocal(variableName);
IExecutionEntity parent = execution.Parent;
while (value == null && parent != null)
{
value = parent.GetLoopVariable <T>(variableName);
parent = parent.Parent;
}
return(value == null ? default : JToken.FromObject(value).ToObject <T>());
}
public ITask[] Execute(ICommandContext commandContext)
{
ProcessEngineConfigurationImpl pec = commandContext.ProcessEngineConfiguration;
IRuntimeService runtimeService = pec.RuntimeService;
ITaskService taskService = pec.TaskService;
IIdGenerator idGenerator = pec.IdGenerator;
ITask task = taskService.CreateTaskQuery().SetTaskId(taskId).SingleResult();
IExecutionEntity execution = runtimeService.CreateExecutionQuery().SetExecutionId(task.ExecutionId).SingleResult() as IExecutionEntity;
IExecutionEntity parent = execution.Parent;
//查找当前待追加人员是否已经存在在任务列表中,proc_inst_id_
IList <ITask> assignTasks = taskService.CreateTaskQuery()
.SetProcessInstanceId(execution.ProcessInstanceId)
.SetTaskAssigneeIds(assignees)
.List();
var users = assignees.Where(x => assignTasks.Any(y => x == y.Assignee) == false).ToList();
if (users.Count == 0)
{
throw new NotFoundAssigneeException();
}
if (parent.IsMultiInstanceRoot && parent.CurrentFlowElement is UserTask mTask)
{
string varName = mTask.LoopCharacteristics.InputDataItem;
var match = new Regex("\\$\\{(.*?)\\}").Match(varName);
varName = match.Groups[1].Value;
IList <string> list = parent.GetLoopVariable <IList <string> >(varName);
parent.SetLoopVariable(varName, users.Union(list).Distinct().ToArray());
}
IList <ITask> tasks = new List <ITask>(users.Count);
foreach (var assignee in users)
{
//创建父活动的子活动
IExecutionEntity newExecution = pec.CommandExecutor.Execute(new CreateChildExecutionCmd(parent));
//设置为激活 状态
newExecution.IsActive = true;
newExecution.ActivityId = execution.ActivityId;
newExecution.BusinessKey = execution.BusinessKey;
//该属性表示创建的newExecution对象为分支，非常重要,不可缺少
newExecution.IsConcurrent = execution.IsConcurrent;
newExecution.IsScope = false;
ITaskEntity taskEntity = pec.CommandExecutor.Execute(new NewTaskCmd(pec.IdGenerator.GetNextId()));
taskEntity.ProcessDefinitionId = task.ProcessDefinitionId;
taskEntity.TaskDefinitionKey = task.TaskDefinitionKey;
taskEntity.ProcessInstanceId = task.ProcessInstanceId;
taskEntity.ExecutionId = newExecution.Id;
taskEntity.Name = task.Name;
if (string.IsNullOrWhiteSpace(taskEntity.Id))
{
string taskId = idGenerator.GetNextId();
taskEntity.Id = taskId;
}
taskEntity.Execution = newExecution;
taskEntity.Assignee = assignee;
if (string.IsNullOrWhiteSpace(assignee) == false)
{
taskEntity.AssigneeUser = AsyncHelper.RunSync(() => userService.GetUser(assignee))?.FullName;
}
taskEntity.TenantId = task.TenantId;
taskEntity.FormKey = task.FormKey;
taskEntity.IsAppend = true;
taskService.SaveTask(taskEntity);
tasks.Add(taskEntity);
}
//修改执行实例父级实例变量数和活动实例变量数
int nrOfInstances = parent.GetLoopVariable <int>(MultiInstanceActivityBehavior.NUMBER_OF_INSTANCES);
int nrOfActiveIntance = parent.GetLoopVariable <int>(MultiInstanceActivityBehavior.NUMBER_OF_ACTIVE_INSTANCES);
int nrOfCompletedInstances = parent.GetLoopVariable <int>(MultiInstanceActivityBehavior.NUMBER_OF_COMPLETED_INSTANCES);
parent.SetLoopVariable(MultiInstanceActivityBehavior.NUMBER_OF_INSTANCES, nrOfInstances + users.Count);
parent.SetLoopVariable(MultiInstanceActivityBehavior.NUMBER_OF_ACTIVE_INSTANCES, nrOfInstances - nrOfCompletedInstances + users.Count);
return(tasks.ToArray());
}