//执行环节开始时间
executeBefore(event.getApplicationContext(), events, procInst.getParentProcInstId());
//获取工作项模式
String mode = activityXml.getWiMode();
WorkItemMode wiMode = WorkItemModeFactory.buildWorkItemMode(mode);
workItems = wiMode.createWorkItem(event, activityXml);
activityInst = new ActivityInst();
activityInst.setActivityDefId(activityDefId);
activityInst.setActivityType(Constants.ACT_TYPE_MANUL);
activityInst.setActivityInstName(activityXml.getName());