java - How to monitor particular column in database -


i have oracle database , want monitor particular table/column in db . if column value crosses threshold value want call java application code perform operation example scale or shutdown. how can achieve this? pointers or needed.

set serverout on declare comm varchar2(2000); begin comm := oscommand_run('/home/jguy/runjavaapp.sh')--for calling commands dbms_output.put_line(comm); end;

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