package Ġcom . ab hr p . daily . common Ċ Ċ object ĠApplication Exceptions Ġ{ ĊĠĠĠ Ġconst Ġval ĠNO _ NULL _ OB SERVER Ġ= Ġ" Observer Ġcannot Ġbe Ġnull " ĊĠĠĠ Ġconst Ġval ĠNO _ NULL _ EXECUT OR Ġ= Ġ" Execution Ġthread Ġcannot Ġbe Ġnull " ĊĠĠĠ Ġconst Ġval ĠNO _ NULL _ SCHEDUL ER Ġ= Ġ" Scheduler Ġcannot Ġbe Ġnull " Ċ }