librenms-librenms/html/includes/object-cache.inc.php

<?php

include_once($config['install_dir'].'/includes/object-cache.inc.php');

// FIXME queries such as the one below should probably go into index.php?

// FIXME: This appears to keep a complete cache of device details in memory for every page load.
// It would be interesting to know where this is used.  It probably should have its own API.

foreach (dbFetchRows("SELECT * FROM `devices` ORDER BY `hostname`") as $device)
{
  if (get_dev_attrib($device,'override_sysLocation_bool'))
  {
    $device['real_location'] = $device['location'];
    $device['location'] = get_dev_attrib($device,'override_sysLocation_string');
  }

  $cache['devices']['hostname'][$device['hostname']] = $device['device_id'];
  $cache['devices']['id'][$device['device_id']] = $device;

  $cache['device_types'][$device['type']]++;
}

$devices  = new ObjCache('devices');
$ports    = new ObjCache('ports');
$services = new ObjCache('services');

if ($devices['down'])  { $devices['bgcolour'] = "#ffcccc"; } else { $devices['bgcolour'] = "transparent"; }
if ($ports['down'])    { $ports['bgcolour'] = "#ffcccc"; } else { $ports['bgcolour'] = "#e5e5e5"; }
if ($services['down']) { $services['bgcolour'] = "#ffcccc"; } else { $services['bgcolour'] = "transparent"; }

?>