Example 8.21 Implementing Store Optimization

...

  public void ejbStore() {
    try {
      // Load the mandatory data
      getResourceDAO().update(getResourceData());

      // Store optimization for dependent objects
      // check dirty and store
      // Check and store commitments
      if (skillSets != null) {
        // Get the DAO to use to store
        SkillSetDAO skillSetDAO = getSkillSetDAO();
        Iterator skillIter = skillSet.iterator();
        while(skillIter.hasNext()) {
          SkillSetVO skill = 
            (SkillSetVO) skillIter.next();
          if (skill.isNew()) {
            // This is a new dependent, insert it
            skillSetDAO.insert(skill);
            skill.resetNew();
            skill.resetDirty();
          }
          else if (skill.isDeleted()) {
            // delete Skill
            skillSetDAO.delete(skill);
            // Remove from dependents list
            skillSets.  remove(skill);
          } 
          else if (skill.isDirty()) {
            // Store Skill, it has been modified
            skillSetDAO.update(skill);
            // Saved, reset dirty.
            skill.resetDirty();
            skill.resetNew();
          }
        }
      }

      // Similarly, implement store optimization 
      // for other dependent objects such as 

      // BlockOutTime, ...
      ...
    } catch(SkillSetException ex) {
      throw new EJBException("Reason:"+...);
    } catch(BlockOutTimeException ex) {
      throw new EJBException("Reason:"+...);
    } catch(CommitmentException ex) {
      throw new EJBException("Reason:"+...);
    }
  }

  ...