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#
# Copyright (c) 2012 Red Hat.
# Copyright (c) 2008,2012 Aconex. All Rights Reserved.
# Copyright (c) 2004 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.
#
use strict;
use warnings;
use PCP::PMDA;
use vars qw( $pmda $red $green $blue $user $system );
my ( $numfetch, $oldfetch ) = ( 0, -1 );
my ( $color_indom, $now_indom ) = ( 0, 1 );
my ( $red, $green, $blue ) = ( 0, 100, 200 );
# simple.now instance domain stuff...
my $simple_config = pmda_config('PCP_PMDAS_DIR') . '/simple/simple.conf';
my %timeslices;
my $file_error = 0;
sub simple_instance # called once per ``instance request'' pdu
{
&simple_timenow_check;
}
sub simple_fetch # called once per ``fetch'' pdu, before callbacks
{
$numfetch++;
&simple_timenow_check;
}
sub simple_fetch_callback # must return array of value,status
{
my ($cluster, $item, $inst) = @_;
return (PM_ERR_INST, 0) unless ( $inst == PM_IN_NULL
|| ($cluster == 0 && $item == 1)
|| ($cluster == 2 && $item == 4) );
if ($cluster == 0) {
if ($item == 0) { return ($numfetch, 1); }
elsif ($item == 1) {
if ($inst == 0) { return ($red = ($red+1) % 255, 1); }
elsif ($inst == 1) { return ($green = ($green+1) % 255, 1); }
elsif ($inst == 2) { return ($blue = ($blue+1) % 255, 1); }
else { return (PM_ERR_INST, 0); }
} else { return (PM_ERR_PMID, 0); }
}
elsif ($cluster == 1) {
if ($oldfetch < $numfetch) { # get current values, if needed
($user, $system, undef, undef) = times;
$oldfetch = $numfetch;
}
if ($item == 2) { return ($user, 1); }
elsif ($item == 3) { return ($system, 1); }
else { return (PM_ERR_PMID, 0); }
}
elsif ($cluster == 2 && $item == 4) {
my $value = pmda_inst_lookup($now_indom, $inst);
return (PM_ERR_INST, 0) unless defined($value);
return ($value, 1);
}
return (PM_ERR_PMID, 0);
}
sub simple_store_callback # must return a single value (scalar context)
{
my ($cluster, $item, $inst, $val) = @_;
my $sts = 0;
if ($cluster == 0) {
if ($item == 0) {
if ($val < 0) { $val = 0; $sts = PM_ERR_SIGN; }
$numfetch = $val;
}
elsif ($item == 1) {
if ($val < 0) { $sts = PM_ERR_SIGN; $val = 0; }
elsif ($val > 255) { $sts = PM_ERR_CONV; $val = 255; }
if ($inst == 0) { $red = $val; }
elsif ($inst == 1) { $green = $val; }
elsif ($inst == 2) { $blue = $val; }
else { $sts = PM_ERR_INST; }
}
else { $sts = PM_ERR_PMID; }
return $sts;
}
elsif ( ($cluster == 1 && ($item == 2 || $item == 3))
|| ($cluster == 2 && $item == 4) ) {
return PM_ERR_PERMISSION;
}
return PM_ERR_PMID;
}
sub simple_timenow_check
{
%timeslices = ();
if (open(CONFIG, $simple_config)) {
my %values;
($values{'sec'}, $values{'min'}, $values{'hour'},
undef,undef,undef,undef,undef) = localtime;
$_ = <CONFIG>;
chomp; # avoid possible \n on last field
foreach my $spec (split(/,/)) {
$timeslices{$spec} = $values{$spec};
}
close CONFIG;
$file_error = 0;
}
else {
unless ($file_error == $!) {
$pmda->log("read failed on $simple_config: $!");
$file_error = $!;
}
}
$pmda->replace_indom( $now_indom, \%timeslices);
}
$pmda = PCP::PMDA->new('simple', 253);
$pmda->connect_pmcd;
$pmda->add_metric(pmda_pmid(0,0), PM_TYPE_U32, PM_INDOM_NULL,
PM_SEM_INSTANT, pmda_units(0,0,0,0,0,0),
'simple.numfetch', '', '');
$pmda->add_metric(pmda_pmid(0,1), PM_TYPE_32, $color_indom,
PM_SEM_INSTANT, pmda_units(0,0,0,0,0,0),
'simple.color', '', '');
$pmda->add_metric(pmda_pmid(1,2), PM_TYPE_DOUBLE, PM_INDOM_NULL,
PM_SEM_COUNTER, pmda_units(0,1,0,0,PM_TIME_SEC,0),
'simple.time.user', '', '');
$pmda->add_metric(pmda_pmid(1,3), PM_TYPE_DOUBLE, PM_INDOM_NULL,
PM_SEM_COUNTER, pmda_units(0,1,0,0,PM_TIME_SEC,0),
'simple.time.sys', '', '');
$pmda->add_metric(pmda_pmid(2,4), PM_TYPE_U32, $now_indom,
PM_SEM_INSTANT, pmda_units(0,0,0,0,0,0),
'simple.now', '', '');
$pmda->add_indom($color_indom, [0 => 'red', 1 => 'green', 2 => 'blue'], '', '');
$now_indom = $pmda->add_indom($now_indom, {}, '', ''); # initialized on-the-fly
$pmda->set_fetch( \&simple_fetch );
$pmda->set_instance( \&simple_instance );
$pmda->set_fetch_callback( \&simple_fetch_callback );
$pmda->set_store_callback( \&simple_store_callback );
$pmda->set_user('pcp');
&simple_timenow_check;
$pmda->run;
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