#!/bin/ksh

DATA_DIR=/opt/data
LOG_DIR=/opt/WebSphere/AppServer/logs
APP_LOG=$LOG_DIR/log.txt
LAST_LINE_FILE=$DATA_DIR/last_line
TIMEOUT=60000

if [ ! -f $LAST_LINE_FILE ]
then
   LAST_LINE_COUNT=`awk 'END {print NR}' $APP_LOG`
else
   LAST_LINE_COUNT=`cat $LAST_LINE_FILE`
fi

if [ -f $APP_LOG ]
then
   LINE_COUNT=`awk 'END {print NR}' $APP_LOG`
   echo $LINE_COUNT > $LAST_LINE_FILE
   if [ $LINE_COUNT -gt $LAST_LINE_COUNT ]
   then
      FIRST_LINE=`expr $LAST_LINE_COUNT + 1`
      LAST_LINE=$LINE_COUNT
   else
         FIRST_LINE=`expr $LAST_LINE_COUNT + 1`
         LAST_LINE=$LAST_LINE_COUNT
      fi
   fi
   if [ $FIRST_LINE -le $LAST_LINE ]
   then
      awk -F"(" 'NR >= first_line && NR <= last_line && $1 ~ "<SEARCH STRING>" {print $2}' first_line=$FIRST_LINE last_line=$LAST_LINE $APP_LOG | awk -F")" '{print $1}' | sed 's/ms//'
      # do stuff
   fi
fi