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<?php
namespace Icinga\Module\Graphite\Graphing;
use Icinga\Data\Fetchable;
use Icinga\Data\Filter\Filter;
use Icinga\Data\Filterable;
use Icinga\Data\Queryable;
use Icinga\Exception\NotImplementedError;
use Icinga\Module\Graphite\GraphiteUtil;
use Icinga\Module\Graphite\Util\IcingadbUtils;
use Icinga\Module\Graphite\Util\MacroTemplate;
use Icinga\Module\Graphite\Util\InternalProcessTracker as IPT;
use Icinga\Module\Icingadb\Compat\UrlMigrator;
use Icinga\Module\Icingadb\Model\Host;
use Icinga\Module\Monitoring\Object\Macro;
use Icinga\Module\Monitoring\Object\MonitoredObject;
use Icinga\Util\Json;
use Icinga\Web\Url;
use InvalidArgumentException;
use ipl\Orm\Model;
use ipl\Stdlib\Filter as IplFilter;
/**
* Queries a {@link MetricsDataSource}
*/
class MetricsQuery implements Queryable, Filterable, Fetchable
{
/**
* @var MetricsDataSource
*/
protected $dataSource;
/**
* The base metrics pattern
*
* @var MacroTemplate
*/
protected $base;
/**
* Extension of {@link base}
*
* @var string[]
*/
protected $filter = [];
/**
* The object to render the graphs for
*
* @var MonitoredObject|Model
*/
protected $object;
/**
* Constructor
*
* @param MetricsDataSource $dataSource
*/
public function __construct(MetricsDataSource $dataSource)
{
$this->dataSource = $dataSource;
}
public function from($target, array $fields = null)
{
if ($fields !== null) {
throw new InvalidArgumentException('Fields are not applicable to this kind of query');
}
try {
$this->base = $target instanceof MacroTemplate ? $target : new MacroTemplate((string) $target);
} catch (InvalidArgumentException $e) {
throw new InvalidArgumentException('Bad target', $e->getCode(), $e);
}
return $this;
}
public function applyFilter(Filter $filter)
{
throw new NotImplementedError(__METHOD__);
}
public function setFilter(Filter $filter)
{
throw new NotImplementedError(__METHOD__);
}
public function getFilter()
{
throw new NotImplementedError(__METHOD__);
}
public function addFilter(Filter $filter)
{
throw new NotImplementedError(__METHOD__);
}
public function where($condition, $value = null)
{
$this->filter[$condition] = $this->escapeMetricStep($value);
return $this;
}
public function fetchAll()
{
$result = [];
foreach ($this->fetchColumn() as $metric) {
$result[] = (object) ['metric' => $metric];
}
return $result;
}
public function fetchRow()
{
$result = $this->fetchColumn();
return empty($result) ? false : (object) ['metric' => $result[0]];
}
public function fetchColumn()
{
$filter = [];
foreach ($this->base->getMacros() as $macro) {
if (isset($this->filter[$macro])) {
$filter[$macro] = $this->filter[$macro];
continue;
}
if (strpos($macro, '.') === false) {
continue;
}
$workaroundMacro = str_replace('.', '_', $macro);
if ($this->object instanceof Model) {
// icingadb macro
$tranformFilter = UrlMigrator::transformFilter(
IplFilter::equal($workaroundMacro, ''),
$this->object instanceof Host ? 'hosts' : 'services'
);
if ($tranformFilter === false) {
continue;
}
$migratedMacro = $tranformFilter->getColumn();
if ($migratedMacro === $workaroundMacro) {
$workaroundMacro = $macro;
} else {
$workaroundMacro = $migratedMacro;
}
$icingadbMacros = IcingadbUtils::getInstance();
$result = $icingadbMacros->resolveMacro($workaroundMacro, $this->object);
} else {
if ($workaroundMacro === 'service_name') {
$workaroundMacro = 'service_description';
}
$result = Macro::resolveMacro($workaroundMacro, $this->object);
}
if ($result !== $workaroundMacro) {
$filter[$macro] = $this->escapeMetricStep($result);
}
}
$client = $this->dataSource->getClient();
$url = Url::fromPath('metrics/expand', [
'query' => $this->base->resolve($filter, '*')
]);
$res = Json::decode($client->request($url));
natsort($res->results);
IPT::recordf('Fetched %s metric(s) from %s', count($res->results), (string) $client->completeUrl($url));
return array_values($res->results);
}
public function fetchOne()
{
$result = $this->fetchColumn();
return empty($result) ? false : $result[0];
}
public function fetchPairs()
{
throw new NotImplementedError(__METHOD__);
}
/**
* Set the object to render the graphs for
*
* @param MonitoredObject|Model $object
*
* @return $this
*/
public function setObject($object)
{
$this->object = $object;
return $this;
}
/**
* Escapes a string for usage in a Graphite metric path between two dots
*
* @param string $step
*
* @return string
*/
protected function escapeMetricStep($step)
{
return preg_replace('/[^a-zA-Z0-9\*\-:^[\]$#%\']/', '_', $step);
}
}
|
