#!/bin/sh
# Copyright (c) 1995-2000 Silicon Graphics, Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.
#

tmp=/tmp/$$
trap "rm -f $tmp.*; exit" 0 1 2 3  15
rm -f $tmp.*

. $PCP_DIR/etc/pcp.env
. $PCP_SHARE_DIR/lib/pmview-args

# default idle time
#
defidle=3600

_usage()
{
    echo >$tmp.msg 'Usage: '$prog' [options] [server ...]

Options
  -b		display byte rate, rather than request rate
  -f		display activity by function, rather than activity by
		result size
  -i            show server names
  -I time       maximum expected idle time in seconds [default $defidle]
  -m max	maximum expected request rate (or maximum byte rate)
  -V            verbose/diagnostic output

pmview(1) options:'
    _pmview_usage >> $tmp.msg
    echo '
Default title is: Web Log Activity (request rate by result size) for Host' >> $tmp.msg
    echo '
  The default is to display the request rate, grouped by result size, for all
  Web servers on the target host.' | fmt >> $tmp.msg
    _pmview_info -f $tmp.msg
}

# --- build WM_COMMAND X(1) property for restart after login/logout ---
#
echo -n "pmview Version 2.1 \"$prog\"" >$tmp.pmview
for arg
do
    echo -n " \"$arg\"" >>$tmp.pmview
done
echo >> $tmp.pmview

# --- parse command line arguments ---
#
verbose=false
serverList=""
max=0
idle=$defidle
class=size
show=request
showInst=false

_pmview_args "$@"

if [ -n "$otherArgs" ]
then
    while getopts "?bfiI:m:v:V" c $otherArgs
    do
	case $c
	in
	    b)	# show bytes not requests
		show=byte
		;;

	    f)	# classify by function (method)
		class=method
		;;
	    i)
		showInst=true
		;;
	    I)
		idle=$OPTARG
		# and now the obscure +ve integer checking bit
		# ...note the creative use of unary - to prevent leading signs
		if [ "X-$idle" != "X`expr 0 + -$idle 2>/dev/null`" ]
		then
		    _pmview_error "$prog: -I must have a positive integral argument"
		    #NOTREACHED
		fi
		;;
	    m)
		max=$OPTARG
		# and now the obscure +ve integer checking bit
		# ...note the creative use of unary - to prevent leading signs
		if [ "X-$max" != "X`expr 0 + -$max 2>/dev/null`" ]
		then
		    _pmview_error "$prog: -m must have a positive integral argument"
		    #NOTREACHED
		fi
		;;
	    v)
                if [ $OPTARG = "1" ]
                then
                    _pmview_warning "$prog: pmview version 1 no longer supported, using version 2"
                elif [ $OPTARG != "2" ]
                then
                    _pmview_error "$prog: only version 2 supported for -v"
                    # NOTREACHED
                fi
		;;
	    V)
		verbose=true
		;;
	    '?')
		_usage
		exit 1
		;;
	esac
    done

    set - $otherArgs
    shift `expr $OPTIND - 1`
    [ $# -gt 0 ] && serverList_sp=$* && serverList=`echo $* | sed -e 's/ /,/g'`
fi
[ -z "$titleArg" ] && titleArg="SGI PCP : Web Log Activity"


if [ $max = 0 ]
then
    if [ $show = request ]
    then
	# requests per second
	max=50
    else
	# bytes per second
	max=500000
    fi
fi


# maximum req error rate (default: 5% of request rate)
#
maxerr=`expr $max / 20`


# if metrics source is an archive, and find out name of host
#
if [ "X$arch" != X ]
then
    host=`pmdumplog -l $arch | $PCP_AWK_PROG '/^Performance/ {print $5}' \
	| sed -e 's/,//g'`
    [ "X$host" = X ] && host="unknown host"
    host="$host (Archive $arch)"
fi


# get perserver instances
#	in the default case use web.perserver.requests.total
#	in the -b flag case use web.perserver.bytes.total
#
rm -f $tmp.int
if [ $show = request ]
then
    pminfo -f $msource $namespace web.perserver.requests.total \
		> $tmp.int 2>/dev/null
else
    pminfo -f $msource $namespace web.perserver.bytes.total \
		> $tmp.int 2>/dev/null
fi
if [ ! -s $tmp.int ]
then
    if [ "X$arch" != "X" ]
    then
	_pmview_error "$prog: weblog metrics not included in the archive \"$arch\""
	#NOTREACHED
    else
	_pmview_error "$prog: weblog metrics not available for host \"$host\""
	#NOTREACHED
    fi
fi

sed -e 's/\]//' -e 's/"//g' $tmp.int \
	| $PCP_AWK_PROG '$1 == "inst" {print $4}' > $tmp.list

if [ ! -s $tmp.list ]
then
    if [ "X$arch" != X ]
    then
	_pmview_error "$prog: failed to get web servers from archive \"$arch\""
	#NOTREACHED
    else
 	_pmview_error "$prog: failed to get web servers from host \"$host\""
	#NOTREACHED
    fi
fi

rm -f $tmp.chosen
if [ -z "$serverList" ]
then
    cp $tmp.list $tmp.chosen
else
    touch $tmp.chosen
    for i in $serverList_sp
    do
	egrep $i $tmp.list >> $tmp.chosen
    done
fi

servers_sp=`cat $tmp.chosen | sort | uniq`
servers=`echo $servers_sp | sed -e 's/ /,/g'`
nservers=`echo $servers | wc -w`

if [ $nservers = 0 ]
then
    _usage
    echo
    echo "Error: $prog: no matching web servers"
    echo "       Available web servers are: " `cat $tmp.list`
    exit 1
fi


if [ $show = request ]
then
    totalLabel="Total_Req_Rate"
    label_sp="\"Request Rate\""
    met="requests"
    titleArg="$titleArg (request rate"
else
    totalLabel="Total_Data_Rate"
    label_sp="\"Data Rate\""
    met="bytes"
    titleArg="$titleArg (data rate"
fi

#
# strings for base plane labels
#
basestr_idle="Elapsed time since the last request\nNormalized to $idle seconds"
if [ $show = request ]
then
    basestr_total="Total number of HTTP requests processed by server\nNormalized to $max requests per second"
    basestr_req="HTTP request rate by response size in bytes\nNormalized to $max hits per second"
    basestr_type="HTTP request rate by HTTP method\nNormalized to $max hits per second"
else
    basestr_total="Total number of bytes processed by server\nNormalized to $max bytes per second"
    basestr_req="HTTP size rate by response size in bytes\nNormalized to $max bytes per second"
    basestr_type="HTTP size rate by HTTP method\nNormalized to $max hits per second"
fi


#--- config file has already been created; continue writing to it ---
#

cat << end-of-file >>$tmp.pmview
#
# $prog
#
# Servers: $servers
#
end-of-file

if $verbose
then
    if [ "X$serverList" != X ]
    then
    	echo "# Matching servers for \"$serverList\": $servers"
    fi
fi

if [ $class = size ]
then
    titleArg="$titleArg by result size)"
else
    titleArg="$titleArg by request type)"
fi


#
# the real config starts here
#
cat << end-of-file >>$tmp.pmview

_scale 1.2

_grid _hide (

	_label 2 0 1 5 _down _large $label_sp

	_bar 0 0 east _col (
		_metrics (
			web.perserver.logidletime[$servers]	$idle
		)
		_metriclabels ( Idle )
		_colorList ( orange )
		_baseLabel "$basestr_idle"
	)

end-of-file

if [ $class = size ]
then
    cat << end-of-file >>$tmp.pmview

	_bar 0 2 east _col (
		_metrics (
			web.perserver.$met.total[$servers]	$max
		)
		_metriclabels ( Total )
		_colorList ( rgbi:0.0/0.88/0.88 )
		_baseLabel "$basestr_total"
	)

	_bar 0 4 east _col _groupbyinst (
		_metrics (
end-of-file

    if [ $show = request ]
    then
	cat <<end-of-file >>$tmp.pmview
			web.perserver.$met.size.unknown[$servers]	$max
end-of-file
    fi

	cat << end-of-file >>$tmp.pmview
			web.perserver.$met.size.gt3m[$servers]		$max
			web.perserver.$met.size.le3m[$servers]		$max
			web.perserver.$met.size.le1m[$servers]		$max
			web.perserver.$met.size.le300k[$servers]	$max
			web.perserver.$met.size.le100k[$servers]	$max
			web.perserver.$met.size.le30k[$servers]		$max
			web.perserver.$met.size.le10k[$servers]		$max
			web.perserver.$met.size.le3k[$servers]		$max
end-of-file

    if [ $show = request ]
    then
	cat <<end-of-file >>$tmp.pmview
			web.perserver.$met.size.zero[$servers]	$max
		)
		_metriclabels (
			"?" "> 3M" "1M < 3M" "300K < 1M" "100K < 300K"
			"30K < 100K" "10K < 30K" "3K < 10K" "0 < 3K" "0K"
		)
end-of-file
    else
	cat <<end-of-file >>$tmp.pmview
		)
		_metriclabels (
			"> 3M" "1M < 3M" "300K < 1M" "100K < 300K"
			"30K < 100K" "10K < 30K" "3K < 10K" "0 < 3K"
		)
end-of-file
    fi

    if $showInst
    then
	cat <<end-of-file >>$tmp.pmview
		_instlabels _away ( $servers_sp )
end-of-file
    fi

    cat << end-of-file >>$tmp.pmview
		_colorList (
			rgbi:1.0/0.35/0.0
			rgbi:0.6/0.0/0.9
			rgbi:0.0/1.0/0.0
			rgbi:1.0/0.5/0.0
			rgbi:0.65/0.3/1.0
			rgbi:0.3/1.0/0.3
			rgbi:1.0/0.65/0.3
			rgbi:0.8/0.6/1.0
			rgbi:0.6/1.0/0.6
			rgbi:1.0/0.8/0.6

		)
		_baseLabel "$basestr_req"
	)

end-of-file

else
    cat << end-of-file >>$tmp.pmview

	_bar 0 2 east _col (
		_metrics (
			web.perserver.$met.total[$servers]	$max
		)
		_metriclabels ( Total )
		_colorList ( rgbi:1.0/0.5/0.0 )
		_baseLabel "$basestr_total"
	)

	_bar 0 4 east _col (
		_metrics (
			web.perserver.$met.get[$servers]	$max
			web.perserver.$met.head[$servers]	$max
			web.perserver.$met.post[$servers]	$max
			web.perserver.$met.other[$servers]	$max
end-of-file

    if [ $show = request ]
    then
	cat << end-of-file >>$tmp.pmview
			web.perserver.errors[$servers]		$maxerr
end-of-file
    fi

    cat << end-of-file >>$tmp.pmview
		)
		_metriclabels ( Get Head Post Other Error )
end-of-file

    if $showInst
    then
	cat <<end-of-file >>$tmp.pmview
		_instlabels _away ( $servers_sp )
end-of-file
    fi

	cat << end-of-file >>$tmp.pmview
		_colorList (
			rgbi:1.0/1.0/0.0
			rgbi:0.0/1.0/1.0
			rgbi:1.0/0.0/1.0
			rgbi:1.0/1.0/0.6
			rgbi:0.8/0.0/0.0
		)
		_baseLabel "$basestr_type"
	)
end-of-file

fi

cat << end-of-file >>$tmp.pmview
)
end-of-file

titleArg="$titleArg for Host $host"

$verbose && cat $tmp.pmview

eval $PMVIEW <$tmp.pmview $args -title "'$titleArg'" -xrm "'*iconName: $prog'"

exit