How to use

getDbEntityManager

method

in

org.camunda.bpm.engine.impl.history.handler.DbHistoryEventHandler

 /** general history event insert behavior */
 protected void insertOrUpdate(HistoryEvent historyEvent) {

  final DbEntityManager dbEntityManager = getDbEntityManager();

  if(isInitialEvent(historyEvent)) {
   dbEntityManager.insert(historyEvent);
  } else {
   if(dbEntityManager.getCachedEntity(historyEvent.getClass(), historyEvent.getId()) == null) {
    if (historyEvent instanceof HistoricScopeInstanceEvent) {
     // if this is a scope, get start time from existing event in DB
     HistoricScopeInstanceEvent existingEvent = (HistoricScopeInstanceEvent) dbEntityManager.selectById(historyEvent.getClass(), historyEvent.getId());
     if(existingEvent != null) {
      HistoricScopeInstanceEvent historicScopeInstanceEvent = (HistoricScopeInstanceEvent) historyEvent;
      historicScopeInstanceEvent.setStartTime(existingEvent.getStartTime());
     }
    }
    if(historyEvent.getId() == null) {
//          dbSqlSession.insert(historyEvent);
    } else {
     dbEntityManager.merge(historyEvent);
    }
   }
  }
 }

 /** general history event insert behavior */
 protected void insertOrUpdate(HistoryEvent historyEvent) {

  final DbEntityManager dbEntityManager = getDbEntityManager();

  if(isInitialEvent(historyEvent)) {
   dbEntityManager.insert(historyEvent);
  } else {
   if(dbEntityManager.getCachedEntity(historyEvent.getClass(), historyEvent.getId()) == null) {
    if (historyEvent instanceof HistoricScopeInstanceEvent) {
     // if this is a scope, get start time from existing event in DB
     HistoricScopeInstanceEvent existingEvent = (HistoricScopeInstanceEvent) dbEntityManager.selectById(historyEvent.getClass(), historyEvent.getId());
     if(existingEvent != null) {
      HistoricScopeInstanceEvent historicScopeInstanceEvent = (HistoricScopeInstanceEvent) historyEvent;
      historicScopeInstanceEvent.setStartTime(existingEvent.getStartTime());
     }
    }
    if(historyEvent.getId() == null) {
//          dbSqlSession.insert(historyEvent);
    } else {
     dbEntityManager.merge(historyEvent);
    }
   }
  }
 }

DbEntityManager dbEntityManager = getDbEntityManager();

DbEntityManager dbEntityManager = getDbEntityManager();

 /** general history event insert behavior */
 protected void insertOrUpdate(HistoryEvent historyEvent) {

  final DbEntityManager dbEntityManager = getDbEntityManager();

  if(isInitialEvent(historyEvent)) {
   dbEntityManager.insert(historyEvent);
  } else {
   if(dbEntityManager.getCachedEntity(historyEvent.getClass(), historyEvent.getId()) == null) {
    if (historyEvent instanceof HistoricScopeInstanceEvent) {
     // if this is a scope, get start time from existing event in DB
     HistoricScopeInstanceEvent existingEvent = (HistoricScopeInstanceEvent) dbEntityManager.selectById(historyEvent.getClass(), historyEvent.getId());
     if(existingEvent != null) {
      HistoricScopeInstanceEvent historicScopeInstanceEvent = (HistoricScopeInstanceEvent) historyEvent;
      historicScopeInstanceEvent.setStartTime(existingEvent.getStartTime());
     }
    }
    if(historyEvent.getId() == null) {
//          dbSqlSession.insert(historyEvent);
    } else {
     dbEntityManager.merge(historyEvent);
    }
   }
  }
 }

DbEntityManager dbEntityManager = getDbEntityManager();