#!/bin/bash
#
: <<=cut

=head1 NAME

hs_read - Plugin to monitor HandlerSocket read port usage.

=head1 APPLICABLE SYSTEMS

All Linux systems

=head1 CONFIGURATION

The following is default configuration

  [hs_read_connections]
	env.mysql_host      localhost
	env.mysql_port	    3306
	env.mysql_user      root
	env.mysql_password  pass

=head1 AUTHOR

Konstantin Kuklin <konstantin.kuklin@gmail.com>

=head1 LICENSE

MIT

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

if [ "$1" = "autoconf" ]; then
    echo no
    exit 0
fi

if [ "$1" = "config" ]; then

    echo 'graph_title HS Read port connections'
    echo "graph_args --base 1000 -l 0"
    echo 'graph_category db'
    echo 'total.label Total'
    echo 'total.draw AREA'
    echo 'total.min 0'
    echo 'active.label Active'
    echo 'active.draw LINE2'
    echo 'active.min 0'
    exit 0
fi

# query
command='mysql';

if [[ ! -z $mysql_host ]]; then
    command="$command -h $mysql_host"
fi

if [  -z $mysql_user ]; then
    command="$command -u root"
else
    command="$command -u $mysql_user"
fi

if [[ ! -z $mysql_password ]]; then
    command="$command -p$mysql_password"
fi

if [[ ! -z $mysql_port ]]; then
    command="$command -P $mysql_port"
fi

totalConnections=$(echo 'show processlist;' | $command | awk ' /'mode=rd'/ {x += $11}; END {print x}')
totalActiveConnections=$(echo 'show processlist;' | $command | awk ' /'mode=rd'/ {x += $13}; END {print x}')

echo "total.value $totalConnections";
echo "active.value $totalActiveConnections";