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<?php
/* Icinga DB Web | (c) 2021 Icinga GmbH | GPLv2 */
namespace Icinga\Module\Icingadb\Redis;
use Exception;
use Generator;
use Icinga\Application\Benchmark;
use Icinga\Module\Icingadb\Common\IcingaRedis;
use Icinga\Module\Icingadb\Model\Host;
use Icinga\Module\Icingadb\Model\Service;
use ipl\Orm\Query;
use ipl\Orm\Resolver;
use ipl\Orm\ResultSet;
use Predis\Client;
use RuntimeException;
class VolatileStateResults extends ResultSet
{
/** @var Resolver */
private $resolver;
/** @var Client */
private $redis;
/** @var bool Whether Redis updates were applied */
private $updatesApplied = false;
public static function fromQuery(Query $query)
{
$self = parent::fromQuery($query);
$self->resolver = $query->getResolver();
try {
$self->redis = IcingaRedis::instance()->getConnection();
} catch (Exception $e) {
// The error has already been logged
}
return $self;
}
/**
* Get whether Redis is unavailable
*
* @return bool
*/
public function isRedisUnavailable(): bool
{
return $this->redis === null;
}
public function current()
{
if ($this->redis && ! $this->updatesApplied && ! $this->isCacheDisabled) {
$this->rewind();
}
return parent::current();
}
public function key(): int
{
if ($this->redis && ! $this->updatesApplied && ! $this->isCacheDisabled) {
$this->rewind();
}
return parent::key();
}
public function rewind(): void
{
if ($this->redis && ! $this->updatesApplied && ! $this->isCacheDisabled) {
$this->updatesApplied = true;
$this->advance();
Benchmark::measure('Applying Redis updates');
$this->applyRedisUpdates();
Benchmark::measure('Redis updates applied');
}
parent::rewind();
}
protected function applyRedisUpdates()
{
$type = null;
$behaviors = null;
$keys = [];
$hostStateKeys = [];
$states = [];
$hostStates = [];
foreach ($this as $row) {
if ($type === null) {
$behaviors = $this->resolver->getBehaviors($row->state);
switch (true) {
case $row instanceof Host:
$type = 'host';
break;
case $row instanceof Service:
$type = 'service';
break;
default:
throw new RuntimeException('Volatile states can only be fetched for hosts and services');
}
}
$states[bin2hex($row->id)] = $row->state;
if (empty($keys)) {
$keys = $row->state->getColumns();
}
if ($type === 'service' && $row->host instanceof Host) {
$hostStates[bin2hex($row->host->id)] = $row->host->state;
if (empty($hostStateKeys)) {
$hostStateKeys = $row->host->state->getColumns();
}
}
}
if (empty($states)) {
return;
}
foreach ($this->fetchStates("icinga:{$type}:state", array_keys($states), $keys) as $id => $data) {
foreach ($data as $key => $value) {
$data[$key] = $behaviors->retrieveProperty($value, $key);
}
$states[$id]->setProperties($data);
}
if ($type === 'service' && ! empty($hostStates)) {
foreach ($this->fetchStates('icinga:host:state', array_keys($hostStates), $hostStateKeys) as $id => $data) {
foreach ($data as $key => $value) {
$data[$key] = $behaviors->retrieveProperty($value, $key);
}
$hostStates[$id]->setProperties($data);
}
}
}
protected function fetchStates(string $key, array $ids, array $keys): Generator
{
$results = $this->redis->hmget($key, $ids);
foreach ($results as $i => $json) {
if ($json !== null) {
$data = json_decode($json, true);
$keyMap = array_fill_keys($keys, null);
unset($keyMap['is_overdue']); // Is calculated by Icinga DB, not Icinga 2, hence it's never in redis
// TODO: Remove once https://github.com/Icinga/icinga2/issues/9427 is fixed
$data['state_type'] = $data['state_type'] === 0 ? 'soft' : 'hard';
yield $ids[$i] => array_intersect_key(array_merge($keyMap, $data), $keyMap);
}
}
}
}
|
