/// <summary>
/// Executes the specified instance.
/// </summary>
/// <param name="instance">The instance.</param>
/// <param name="activity">The activity.</param>
public void Execute(WorkflowInstance instance, ActivityBase activity)
{
if (instance == null)
{
throw new ArgumentNullException("instance");
}
if (activity == null)
{
throw new ArgumentNullException("activity");
}
if (string.IsNullOrEmpty(activity.UserId))
{
activity.UserId = GetService <IIdentityService>().GetUserIdentity().GetUserId();
}
IWorkflowSecurityService service = GetService <IWorkflowSecurityService>();
ApprovalRole role = service.GetActionRole(instance, activity.UserId, activity.EventName);
activity.UserApprovalRole = role.Name;
if (service.CanDoAction(instance, activity.EventName))
{
ITransactionService transactionService = GetService <ITransactionService>();
transactionService.BeginTransaction();
try
{
instance.InternalExecute(activity);
transactionService.CommitTransaction();
}
catch (Exception ep)
{
transactionService.RollbackTransaction();
throw ep;
}
}
else
{
throw new WorkflowExecuteExeception(string.Format("不能执行本次操作:流程当前状态\"{0}\"不能进行\"{1}\"操作,或您不具备执行该操作的权限.", ((StateMachineWorkflowInstance)instance).CurrentState.Description));
}
}
/// <summary>
/// Undoes the specified instance.
/// </summary>
/// <param name="instance">The instance.</param>
public void Undo(WorkflowInstance instance)
{
ITransactionService transactionService = GetService <ITransactionService>();
IWorkflowSecurityService security = GetService <IWorkflowSecurityService>();
if (security.CanCancel(instance))
{
transactionService.BeginTransaction();
try
{
instance.InternalUndo();
}
catch (Exception ep)
{
transactionService.RollbackTransaction();
throw ep;
}
}
else
{
throw new WorkflowExecuteExeception("当前状态不允许您进行撤销操作，或你不是该项目上次审批动作的执行者，没有权限进行撤销操作！只有执行者本人才能执行撤销");
}
}
