Looping in the shell script with help of script timer.
Hello Experts-
We are facing some issues in the while loop script when we use the script time to decide whether to exist from the loop or continue.
Below is the script
HTML Code:
SrcExitLoop="FALSE"
Src_InitialStartTime=`date +%s`
Src_StartTime=`date +%s`
Src_NUM_ALERTS=0
TOTAL_ALERTS=`expr <SOME WAIT THRESHOLD.e.g.50> / <SOME ALERT SECONDS.e.g 10>`
while [[ ${SrcExitLoop} == "FALSE" ]]
do
"Some Oracle Query"
Src_CurrentTime=`date +%s`
Src_WaitTime=`expr ${Src_CurrentTime} - ${Src_StartTime}`
Src_TotalTime=`expr ${Src_CurrentTime} - ${Src_InitialStartTime}`
if [[ ${Src_WaitTime} -gt <SOME ALERT SECONDS.e.g 10> ]]
then
if [[ ${Src_TotalTime} -gt <SOME WAIT THRESHOLD.e.g.50> ]]
then
echo "Reached Max Seconds"
else
Src_NUM_ALERTS=`expr ${Src_NUM_ALERTS} + 1`
TotalTimeFormat=`printf ""%dh:%dm:%ds"\n" $((${Src_TotalTime}/3600)) $((${Src_TotalTime}%3600/60)) $((${Src_TotalTime}%60))`
AlertSecondsFormat=`printf ""%dh:%dm:%ds"\n" $((${alert_seconds}/3600)) $((${alert_seconds}%3600/60)) $((${alert_seconds}%60))`
errorSubject="ALERT ${Src_NUM_ALERTS}/${TOTAL_ALERTS} :- Process continues"
errorText="EMAIL BODY"
echo "${errorText}" | mailx -s "${errorSubject}" ${EMAIL_LIST}
Src_StartTime=`date +%s`
fi
else
sleep <SOME VALUE.e.g.5>
fi
if [[ ${Src_TotalTime} -gt <SOME WAIT THRESHOLD.e.g.50> ]]
then
Src_NUM_ALERTS_1=`expr ${Src_NUM_ALERTS} + 1 `
TotalTimeFormat=`printf ""%dh:%dm:%ds"\n" $((${Src_TotalTime}/3600)) $((${Src_TotalTime}%3600/60)) $((${Src_TotalTime}%60))`
AlertSecondsFormat=`printf ""%dh:%dm:%ds"\n" $((${alert_seconds}/3600)) $((${alert_seconds}%3600/60)) $((${alert_seconds}%60))`
errorSubject="ALERT ${Src_NUM_ALERTS_1}/${TOTAL_ALERTS} :- Process STOPPED"
errorText="EMAIL BODY"
echo "${errorText}" | mailx -s "${errorSubject}" ${EMAIL_LIST}
SrcExitLoop="TRUE"
exit 0
fi
done
This script works fine most of the time. Since we are using unix start and end time to determine the wait time and total time, it some times doesn't give all the emails.
This happens because the return time from the oracle is more.
For example :-
if our sleep time is 5 seconds ,
alert time is 10 seconds,
total threshold is 50 seconds.
Ideally we should receive 5 email every 10 seconds. Subject will "ALETRT 1/5...5/5".
But some times oracle is taking more than 10 seconds to return the value. Now the Src_NUM_ALERTS variable skips the one value..so insteading of receving 5 emails we receive only 4 emails and last email is "ALERT 4/5".
It miss one iteration that is breaks at...
Code:
Src_NUM_ALERTS=`expr ${Src_NUM_ALERTS} + 1`
Is there any other way where in we can avoid this skip? Can we simply use counter?
How can we define in the script that alert us every pre defined seconds(e.g.10 seconds) and do iteration depending upon the total wait time divided by total alert time(e.g.50/10)?
The email won't be coming exactly after 10 seconds(in this case) but we should recevie 5 emails(for above parametrers).
Please help.
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05-24-2012
Looping in the shell script with help of script timer.
Can we simply use counter?