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Diffstat (limited to '')
| -rw-r--r-- | library/Toplevelview/Tree/TLVTree.php | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/library/Toplevelview/Tree/TLVTree.php b/library/Toplevelview/Tree/TLVTree.php new file mode 100644 index 0000000..817d52c --- /dev/null +++ b/library/Toplevelview/Tree/TLVTree.php @@ -0,0 +1,251 @@ +<?php +/* Copyright (C) 2017 Icinga Development Team <info@icinga.com> */ + +namespace Icinga\Module\Toplevelview\Tree; + +use Icinga\Application\Logger; +use Icinga\Exception\IcingaException; +use Icinga\Exception\NotFoundError; +use Icinga\Exception\ProgrammingError; +use Icinga\Module\Monitoring\Backend\MonitoringBackend; +use Icinga\Module\Toplevelview\Util\Json; +use Icinga\Module\Toplevelview\ViewConfig; +use Icinga\Web\FileCache; +use stdClass; + +class TLVTree extends TLVTreeNode +{ + protected static $titleKey = 'name'; + + public $registeredTypes = array(); + + public $registeredObjects = array(); + + protected $fetchedData = array(); + + protected $fetched = false; + + protected $fetchTime; + + protected $cacheLifetime = 60; + + /** + * @var MonitoringBackend + */ + protected $backend; + + /** + * @var ViewConfig + */ + protected $config; + + public function getById($id) + { + $ids = explode('-', $id); + $currentNode = $this; + + foreach ($ids as $i) { + $children = $currentNode->getChildren(); + if (! empty($children) && array_key_exists($i, $children)) { + $currentNode = $children[$i]; + } else { + throw new NotFoundError( + 'Could not find ID %s after %s for path %s', + $i, + $currentNode->getFullId(), + $id + ); + } + } + + return $currentNode; + } + + /** + * @return ViewConfig + */ + public function getConfig() + { + return $this->config; + } + + /** + * @param ViewConfig $config + * + * @return $this + */ + public function setConfig(ViewConfig $config) + { + $this->config = $config; + return $this; + } + + public function registerObject($type, $name, $class) + { + if (array_key_exists($type, $this->registeredTypes) && $this->registeredTypes[$type] !== $class) { + throw new ProgrammingError( + 'Tried to register the same type by multiple classes: %s - %s - %s', + $type, + $this->registeredTypes[$type], + $class + ); + } + + $this->registeredTypes[$type] = $class; + $this->registeredObjects[$type][$name] = null; + } + + protected function getCacheName() + { + $config = $this->getConfig(); + return sprintf( + '%s-%s.json', + $config->getName(), + $config->getTextChecksum() + ); + } + + protected function loadCache() + { + if (($lifetime = $this->getCacheLifetime()) <= 0) { + return; + } + + $cacheName = $this->getCacheName(); + try { + $cache = FileCache::instance('toplevelview'); + $currentTime = time(); + $newerThan = $currentTime - $lifetime; + + if ($cache->has($cacheName)) { + $cachedData = Json::decode($cache->get($cacheName)); + + if (property_exists($cachedData, 'data') + && $cachedData->data !== null + && property_exists($cachedData, 'ts') + && $cachedData->ts <= $currentTime // too new maybe + && $cachedData->ts > $newerThan // too old + ) { + foreach ($cachedData->data as $type => $objects) { + $this->registeredObjects[$type] = (array) $objects; + $this->fetchedData[$type] = true; + } + + $this->fetchTime = $cachedData->ts; + $this->fetched = true; + } + } + } catch (IcingaException $e) { + Logger::error('Could not load from toplevelview cache %s: %s', $cacheName, $e->getMessage()); + } + } + + protected function storeCache() + { + if (($lifetime = $this->getCacheLifetime()) <= 0) { + return; + } + + $cacheName = $this->getCacheName(); + try { + $cache = FileCache::instance('toplevelview'); + + $cachedData = new stdClass; + $cachedData->ts = $this->fetchTime; + $cachedData->data = $this->registeredObjects; + + $cache->store($cacheName, Json::encode($cachedData)); + } catch (IcingaException $e) { + Logger::error('Could not store to toplevelview cache %s: %s', $cacheName, $e->getMessage()); + } + } + + protected function fetchType($type) + { + if (! array_key_exists($type, $this->registeredTypes)) { + throw new ProgrammingError('Type %s has not been registered', $type); + } + + if (! array_key_exists($type, $this->fetchedData)) { + /** @var TLVIcingaNode $class */ + $class = $this->registeredTypes[$type]; + $class::fetch($this); + $this->fetchedData[$type] = true; + } + + return $this; + } + + protected function ensureFetched() + { + if ($this->fetched !== true) { + $this->loadCache(); + + if ($this->fetched !== true) { + foreach (array_keys($this->registeredTypes) as $type) { + $this->fetchType($type); + } + + $this->fetchTime = time(); + $this->fetched = true; + + $this->storeCache(); + } + } + + return $this; + } + + public function getFetched($type, $key) + { + $this->ensureFetched(); + + if (array_key_exists($key, $this->registeredObjects[$type]) + && $this->registeredObjects[$type][$key] !== null + ) { + return $this->registeredObjects[$type][$key]; + } else { + return null; + } + } + + public function getBackend() + { + return $this->backend; + } + + public function setBackend(MonitoringBackend $backend) + { + $this->backend = $backend; + return $this; + } + + /** + * @return int time + */ + public function getFetchTime() + { + $this->ensureFetched(); + + return $this->fetchTime; + } + + /** + * @return int seconds + */ + public function getCacheLifetime() + { + return $this->cacheLifetime; + } + + /** + * @param int $cacheLifetime In seconds + * + * @return $this + */ + public function setCacheLifetime($cacheLifetime) + { + $this->cacheLifetime = $cacheLifetime; + return $this; + } +} |