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phorge/src/infrastructure/cluster/search/PhabricatorSearchService.php
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PhabricatorSearchService.php
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<?php
class PhabricatorSearchService
extends Phobject {
const KEY_REFS = 'cluster.search.refs';
protected $config;
protected $disabled;
protected $engine;
protected $hosts = array();
protected $hostsConfig;
protected $hostType;
protected $roles = array();
const STATUS_OKAY = 'okay';
const STATUS_FAIL = 'fail';
const ROLE_WRITE = 'write';
const ROLE_READ = 'read';
public function __construct(PhabricatorFulltextStorageEngine $engine) {
$this->engine = $engine;
$this->hostType = $engine->getHostType();
}
/**
* @throws Exception
*/
public function newHost($config) {
$host = clone($this->hostType);
$host_config = $this->config + $config;
$host->setConfig($host_config);
$this->hosts[] = $host;
return $host;
}
public function getEngine() {
return $this->engine;
}
public function getDisplayName() {
return $this->hostType->getDisplayName();
}
public function getStatusViewColumns() {
return $this->hostType->getStatusViewColumns();
}
public function setConfig($config) {
$this->config = $config;
if (!isset($config['hosts'])) {
$config['hosts'] = array(
array(
'host' => idx($config, 'host'),
'port' => idx($config, 'port'),
'protocol' => idx($config, 'protocol'),
'roles' => idx($config, 'roles'),
),
);
}
foreach ($config['hosts'] as $host) {
$this->newHost($host);
}
}
public function getConfig() {
return $this->config;
}
public static function getConnectionStatusMap() {
return array(
self::STATUS_OKAY => array(
'icon' => 'fa-exchange',
'color' => 'green',
'label' => pht('Okay'),
),
self::STATUS_FAIL => array(
'icon' => 'fa-times',
'color' => 'red',
'label' => pht('Failed'),
),
);
}
public function isWritable() {
return (bool)$this->getAllHostsForRole(self::ROLE_WRITE);
}
public function isReadable() {
return (bool)$this->getAllHostsForRole(self::ROLE_READ);
}
public function getPort() {
return idx($this->config, 'port');
}
public function getProtocol() {
return idx($this->config, 'protocol');
}
public function getVersion() {
return idx($this->config, 'version');
}
public function getHosts() {
return $this->hosts;
}
/**
* Get a random host reference with the specified role, skipping hosts which
* failed recent health checks.
* @throws PhabricatorClusterNoHostForRoleException if no healthy hosts match.
* @return PhabricatorSearchHost
*/
public function getAnyHostForRole($role) {
$hosts = $this->getAllHostsForRole($role);
shuffle($hosts);
foreach ($hosts as $host) {
$health = $host->getHealthRecord();
if ($health->getIsHealthy()) {
return $host;
}
}
throw new PhabricatorClusterNoHostForRoleException($role);
}
/**
* Get all configured hosts for this service which have the specified role.
* @return PhabricatorSearchHost[]
*/
public function getAllHostsForRole($role) {
// if the role is explicitly set to false at the top level, then all hosts
// have the role disabled.
if (idx($this->config, $role) === false) {
return array();
}
$hosts = array();
foreach ($this->hosts as $host) {
if ($host->hasRole($role)) {
$hosts[] = $host;
}
}
return $hosts;
}
/**
* Get a reference to all configured fulltext search cluster services
* @return PhabricatorSearchService[]
*/
public static function getAllServices() {
$cache = PhabricatorCaches::getRequestCache();
$refs = $cache->getKey(self::KEY_REFS);
if (!$refs) {
$refs = self::newRefs();
$cache->setKey(self::KEY_REFS, $refs);
}
return $refs;
}
/**
* Load all valid PhabricatorFulltextStorageEngine subclasses
*/
public static function loadAllFulltextStorageEngines() {
return id(new PhutilClassMapQuery())
->setAncestorClass('PhabricatorFulltextStorageEngine')
->setUniqueMethod('getEngineIdentifier')
->execute();
}
/**
* Create instances of PhabricatorSearchService based on configuration
* @return PhabricatorSearchService[]
*/
public static function newRefs() {
$services = PhabricatorEnv::getEnvConfig('cluster.search');
$engines = self::loadAllFulltextStorageEngines();
$refs = array();
foreach ($services as $config) {
// Normally, we've validated configuration before we get this far, but
// make sure we don't fatal if we end up here with a bogus configuration.
if (!isset($engines[$config['type']])) {
throw new Exception(
pht(
'Configured search engine type "%s" is unknown. Valid engines '.
'are: %s.',
$config['type'],
implode(', ', array_keys($engines))));
}
$engine = clone($engines[$config['type']]);
$cluster = new self($engine);
$cluster->setConfig($config);
$engine->setService($cluster);
$refs[] = $cluster;
}
return $refs;
}
/**
* (re)index the document: attempt to pass the document to all writable
* fulltext search hosts
*/
public static function reindexAbstractDocument(
PhabricatorSearchAbstractDocument $document) {
$exceptions = array();
foreach (self::getAllServices() as $service) {
if (!$service->isWritable()) {
continue;
}
$engine = $service->getEngine();
try {
$engine->reindexAbstractDocument($document);
} catch (Exception $ex) {
$exceptions[] = $ex;
}
}
if ($exceptions) {
throw new PhutilAggregateException(
pht(
'Writes to search services failed while reindexing document "%s".',
$document->getPHID()),
$exceptions);
}
}
/**
* Execute a full-text query and return a list of PHIDs of matching objects.
* @return string[]
* @throws PhutilAggregateException
*/
public static function executeSearch(PhabricatorSavedQuery $query) {
$result_set = self::newResultSet($query);
return $result_set->getPHIDs();
}
public static function newResultSet(PhabricatorSavedQuery $query) {
$exceptions = array();
// try all services until one succeeds
foreach (self::getAllServices() as $service) {
if (!$service->isReadable()) {
continue;
}
try {
$engine = $service->getEngine();
$phids = $engine->executeSearch($query);
return id(new PhabricatorFulltextResultSet())
->setPHIDs($phids)
->setFulltextTokens($engine->getFulltextTokens());
} catch (PhutilSearchQueryCompilerSyntaxException $ex) {
// If there's a query compilation error, return it directly to the
// user: they issued a query with bad syntax.
throw $ex;
} catch (Exception $ex) {
$exceptions[] = $ex;
}
}
$msg = pht('All of the configured Fulltext Search services failed.');
throw new PhutilAggregateException($msg, $exceptions);
}
}

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