Shell Programming and Scripting

I have log files that contain data generated every 5 minutes.

I want to extract data from the log files to another log file

In each 5 minute series

<log4j:event logger="VistaMonitor" timestamp="1200688175425" time="Fri Jan 18 15:29:35 EST 2008"

Generated twice (I only to get the date once)

Further in the log file I need to extract from this line:

JMS: IntegrationFrameworkJMSServer.InboundQueue: 1,1,13479,13514,1,81700

I need the third value '13479' and last value '81700'

The script I was successful in putting together a script to tail the data but I want to extract the data one line per 5 min period
from a complete file.

Any suggestions would be helpful

Current Script:

#!/bin/ksh

MONITORLOG="/opt/bea/weblogic81/config/WebCTDomain/logs/webct_monitor.log"
LOG="/export/home/oracle/lmbct.log"

#DATE=`date +%m/%d/%Y-%H:%M`

WAIT=`grep " JMS: IntegrationFrameworkJMSServer.InboundQueue: " ${MONITORLOG} |t
ail -1 |cut -d',' -f 6`

DATE=`date +%m/%d/%Y-%H:%M`
HOSTNAME=`hostname`


echo "${DATE},${HOSTNAME},${WAIT}" >> ${LOG}