Source of file Balancer.php
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/var/www/docs.ssmods.com/process/src/code/thirdparty/Apache/Solr/Service/Balancer.php
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * @copyright Copyright 2007-2013 PTC Inc. (http://ptc.com) * @license https://raw.github.com/PTCInc/solr-php-client/master/COPYING 3-Clause BSD * * @package Apache * @subpackage Solr * @author Donovan Jimenez, Dan Wolfe */ // See Issue #1 (http://code.google.com/p/solr-php-client/issues/detail?id=1) // Doesn't follow typical include path conventions, but is more convenient for users require_once(dirname(dirname(__FILE__)) . '/Service.php'); require_once(dirname(dirname(__FILE__)) . '/NoServiceAvailableException.php'); /** * Reference Implementation for using multiple Solr services in a distribution. Functionality * includes: * routing of read / write operations * failover (on selection) for multiple read servers */ class Apache_Solr_Service_Balancer { /** * SVN Revision meta data for this class */ const SVN_REVISION = '$Revision$'; /** * SVN ID meta data for this class */ const SVN_ID = '$Id$'; /** * SVN HeadURL meta data for this class */ const SVN_URL = '$HeadURL$'; protected $_createDocuments = true; protected $_readableServices = array(); protected $_writeableServices = array(); protected $_currentReadService = null; protected $_currentWriteService = null; protected $_readPingTimeout = 2; protected $_writePingTimeout = 4; // Configuration for server selection backoff intervals protected $_useBackoff = false; // Set to true to use more resillient write server selection protected $_backoffLimit = 600; // 10 minute default maximum protected $_backoffEscalation = 2.0; // Rate at which to increase backoff period protected $_defaultBackoff = 2.0; // Default backoff interval /** * Escape a value for special query characters such as ':', '(', ')', '*', '?', etc. * * NOTE: inside a phrase fewer characters need escaped, use {@link Apache_Solr_Service::escapePhrase()} instead * * @param string $value * @return string */ static public function escape($value) { return Apache_Solr_Service::escape($value); } /** * Escape a value meant to be contained in a phrase for special query characters * * @param string $value * @return string */ static public function escapePhrase($value) { return Apache_Solr_Service::escapePhrase($value); } /** * Convenience function for creating phrase syntax from a value * * @param string $value * @return string */ static public function phrase($value) { return Apache_Solr_Service::phrase($value); } /** * Constructor. Takes arrays of read and write service instances or descriptions * * @param array $readableServices * @param array $writeableServices */ public function __construct($readableServices = array(), $writeableServices = array()) { //setup readable services foreach ($readableServices as $service) { $this->addReadService($service); } //setup writeable services foreach ($writeableServices as $service) { $this->addWriteService($service); } } public function setReadPingTimeout($timeout) { $this->_readPingTimeout = $timeout; } public function setWritePingTimeout($timeout) { $this->_writePingTimeout = $timeout; } public function setUseBackoff($enable) { $this->_useBackoff = $enable; } /** * Generates a service ID * * @param string $host * @param integer $port * @param string $path * @return string */ protected function _getServiceId($host, $port, $path) { return $host . ':' . $port . $path; } /** * Adds a service instance or service descriptor (if it is already * not added) * * @param mixed $service * * @throws Apache_Solr_InvalidArgumentException If service descriptor is not valid */ public function addReadService($service) { if ($service instanceof Apache_Solr_Service) { $id = $this->_getServiceId($service->getHost(), $service->getPort(), $service->getPath()); $this->_readableServices[$id] = $service; } else if (is_array($service)) { if (isset($service['host']) && isset($service['port']) && isset($service['path'])) { $id = $this->_getServiceId((string)$service['host'], (int)$service['port'], (string)$service['path']); $this->_readableServices[$id] = $service; } else { throw new Apache_Solr_InvalidArgumentException('A Readable Service description array does not have all required elements of host, port, and path'); } } } /** * Removes a service instance or descriptor from the available services * * @param mixed $service * * @throws Apache_Solr_InvalidArgumentException If service descriptor is not valid */ public function removeReadService($service) { $id = ''; if ($service instanceof Apache_Solr_Service) { $id = $this->_getServiceId($service->getHost(), $service->getPort(), $service->getPath()); } else if (is_array($service)) { if (isset($service['host']) && isset($service['port']) && isset($service['path'])) { $id = $this->_getServiceId((string)$service['host'], (int)$service['port'], (string)$service['path']); } else { throw new Apache_Solr_InvalidArgumentException('A Readable Service description array does not have all required elements of host, port, and path'); } } else if (is_string($service)) { $id = $service; } if ($id && isset($this->_readableServices[$id])) { unset($this->_readableServices[$id]); } } /** * Adds a service instance or service descriptor (if it is already * not added) * * @param mixed $service * * @throws Apache_Solr_InvalidArgumentException If service descriptor is not valid */ public function addWriteService($service) { if ($service instanceof Apache_Solr_Service) { $id = $this->_getServiceId($service->getHost(), $service->getPort(), $service->getPath()); $this->_writeableServices[$id] = $service; } else if (is_array($service)) { if (isset($service['host']) && isset($service['port']) && isset($service['path'])) { $id = $this->_getServiceId((string)$service['host'], (int)$service['port'], (string)$service['path']); $this->_writeableServices[$id] = $service; } else { throw new Apache_Solr_InvalidArgumentException('A Writeable Service description array does not have all required elements of host, port, and path'); } } } /** * Removes a service instance or descriptor from the available services * * @param mixed $service * * @throws Apache_Solr_InvalidArgumentException If service descriptor is not valid */ public function removeWriteService($service) { $id = ''; if ($service instanceof Apache_Solr_Service) { $id = $this->_getServiceId($service->getHost(), $service->getPort(), $service->getPath()); } else if (is_array($service)) { if (isset($service['host']) && isset($service['port']) && isset($service['path'])) { $id = $this->_getServiceId((string)$service['host'], (int)$service['port'], (string)$service['path']); } else { throw new Apache_Solr_InvalidArgumentException('A Readable Service description array does not have all required elements of host, port, and path'); } } else if (is_string($service)) { $id = $service; } if ($id && isset($this->_writeableServices[$id])) { unset($this->_writeableServices[$id]); } } /** * Iterate through available read services and select the first with a ping * that satisfies configured timeout restrictions (or the default) * * @return Apache_Solr_Service * * @throws Apache_Solr_NoServiceAvailableException If there are no read services that meet requirements */ protected function _selectReadService($forceSelect = false) { if (!$this->_currentReadService || !isset($this->_readableServices[$this->_currentReadService]) || $forceSelect) { if ($this->_currentReadService && isset($this->_readableServices[$this->_currentReadService]) && $forceSelect) { // we probably had a communication error, ping the current read service, remove it if it times out if ($this->_readableServices[$this->_currentReadService]->ping($this->_readPingTimeout) === false) { $this->removeReadService($this->_currentReadService); } } if (count($this->_readableServices)) { // select one of the read services at random $ids = array_keys($this->_readableServices); $id = $ids[rand(0, count($ids) - 1)]; $service = $this->_readableServices[$id]; if (is_array($service)) { //convert the array definition to a client object $service = new Apache_Solr_Service($service['host'], $service['port'], $service['path']); $this->_readableServices[$id] = $service; } $service->setCreateDocuments($this->_createDocuments); $this->_currentReadService = $id; } else { throw new Apache_Solr_NoServiceAvailableException('No read services were available'); } } return $this->_readableServices[$this->_currentReadService]; } /** * Iterate through available write services and select the first with a ping * that satisfies configured timeout restrictions (or the default) * * @return Apache_Solr_Service * * @throws Apache_Solr_NoServiceAvailableException If there are no write services that meet requirements */ protected function _selectWriteService($forceSelect = false) { if($this->_useBackoff) { return $this->_selectWriteServiceSafe($forceSelect); } if (!$this->_currentWriteService || !isset($this->_writeableServices[$this->_currentWriteService]) || $forceSelect) { if ($this->_currentWriteService && isset($this->_writeableServices[$this->_currentWriteService]) && $forceSelect) { // we probably had a communication error, ping the current read service, remove it if it times out if ($this->_writeableServices[$this->_currentWriteService]->ping($this->_writePingTimeout) === false) { $this->removeWriteService($this->_currentWriteService); } } if (count($this->_writeableServices)) { // select one of the read services at random $ids = array_keys($this->_writeableServices); $id = $ids[rand(0, count($ids) - 1)]; $service = $this->_writeableServices[$id]; if (is_array($service)) { //convert the array definition to a client object $service = new Apache_Solr_Service($service['host'], $service['port'], $service['path']); $this->_writeableServices[$id] = $service; } $this->_currentWriteService = $id; } else { throw new Apache_Solr_NoServiceAvailableException('No write services were available'); } } return $this->_writeableServices[$this->_currentWriteService]; } /** * Iterate through available write services and select the first with a ping * that satisfies configured timeout restrictions (or the default). The * timeout period will increase until a connection is made or the limit is * reached. This will allow for increased reliability with heavily loaded * server(s). * * @return Apache_Solr_Service * * @throws Apache_Solr_NoServiceAvailableException If there are no write services that meet requirements */ protected function _selectWriteServiceSafe($forceSelect = false) { if (!$this->_currentWriteService || !isset($this->_writeableServices[$this->_currentWriteService]) || $forceSelect) { if (count($this->_writeableServices)) { $backoff = $this->_defaultBackoff; do { // select one of the read services at random $ids = array_keys($this->_writeableServices); $id = $ids[rand(0, count($ids) - 1)]; $service = $this->_writeableServices[$id]; if (is_array($service)) { //convert the array definition to a client object $service = new Apache_Solr_Service($service['host'], $service['port'], $service['path']); $this->_writeableServices[$id] = $service; } $this->_currentWriteService = $id; $backoff *= $this->_backoffEscalation; if($backoff > $this->_backoffLimit) { throw new Apache_Solr_NoServiceAvailableException('No write services were available. All timeouts exceeded.'); } } while($this->_writeableServices[$this->_currentWriteService]->ping($backoff) === false); } else { throw new Apache_Solr_NoServiceAvailableException('No write services were available'); } } return $this->_writeableServices[$this->_currentWriteService]; } /** * Set the create documents flag. This determines whether {@link Apache_Solr_Response} objects will * parse the response and create {@link Apache_Solr_Document} instances in place. * * @param boolean $createDocuments */ public function setCreateDocuments($createDocuments) { $this->_createDocuments = (bool) $createDocuments; // set on current read service if ($this->_currentReadService) { $service = $this->_selectReadService(); $service->setCreateDocuments($createDocuments); } } /** * Get the current state of teh create documents flag. * * @return boolean */ public function getCreateDocuments() { return $this->_createDocuments; } /** * Raw Add Method. Takes a raw post body and sends it to the update service. Post body * should be a complete and well formed "add" xml document. * * @param string $rawPost * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function add($rawPost) { $service = $this->_selectWriteService(); do { try { return $service->add($rawPost); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Add a Solr Document to the index * * @param Apache_Solr_Document $document * @param boolean $allowDups * @param boolean $overwritePending * @param boolean $overwriteCommitted * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function addDocument(Apache_Solr_Document $document, $allowDups = false, $overwritePending = true, $overwriteCommitted = true) { $service = $this->_selectWriteService(); do { try { return $service->addDocument($document, $allowDups, $overwritePending, $overwriteCommitted); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Add an array of Solr Documents to the index all at once * * @param array $documents Should be an array of Apache_Solr_Document instances * @param boolean $allowDups * @param boolean $overwritePending * @param boolean $overwriteCommitted * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function addDocuments($documents, $allowDups = false, $overwritePending = true, $overwriteCommitted = true) { $service = $this->_selectWriteService(); do { try { return $service->addDocuments($documents, $allowDups, $overwritePending, $overwriteCommitted); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Send a commit command. Will be synchronous unless both wait parameters are set * to false. * * @param boolean $waitFlush * @param boolean $waitSearcher * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function commit($optimize = true, $waitFlush = true, $waitSearcher = true, $timeout = 3600) { $service = $this->_selectWriteService(); do { try { return $service->commit($optimize, $waitFlush, $waitSearcher, $timeout); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Raw Delete Method. Takes a raw post body and sends it to the update service. Body should be * a complete and well formed "delete" xml document * * @param string $rawPost * @param float $timeout Maximum expected duration of the delete operation on the server (otherwise, will throw a communication exception) * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function delete($rawPost, $timeout = 3600) { $service = $this->_selectWriteService(); do { try { return $service->delete($rawPost, $timeout); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Create a delete document based on document ID * * @param string $id * @param boolean $fromPending * @param boolean $fromCommitted * @param float $timeout Maximum expected duration of the delete operation on the server (otherwise, will throw a communication exception) * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function deleteById($id, $fromPending = true, $fromCommitted = true, $timeout = 3600) { $service = $this->_selectWriteService(); do { try { return $service->deleteById($id, $fromPending, $fromCommitted, $timeout); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Create and post a delete document based on multiple document IDs. * * @param array $ids Expected to be utf-8 encoded strings * @param boolean $fromPending * @param boolean $fromCommitted * @param float $timeout Maximum expected duration of the delete operation on the server (otherwise, will throw a communication exception) * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function deleteByMultipleIds($ids, $fromPending = true, $fromCommitted = true, $timeout = 3600) { $service = $this->_selectWriteService(); do { try { return $service->deleteByMultipleId($ids, $fromPending, $fromCommitted, $timeout); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Create a delete document based on a query and submit it * * @param string $rawQuery * @param boolean $fromPending * @param boolean $fromCommitted * @param float $timeout Maximum expected duration of the delete operation on the server (otherwise, will throw a communication exception) * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function deleteByQuery($rawQuery, $fromPending = true, $fromCommitted = true, $timeout = 3600) { $service = $this->_selectWriteService(); do { try { return $service->deleteByQuery($rawQuery, $fromPending, $fromCommitted, $timeout); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Use Solr Cell to extract document contents. See {@link http://wiki.apache.org/solr/ExtractingRequestHandler} for information on how * to use Solr Cell and what parameters are available. * * NOTE: when passing an Apache_Solr_Document instance, field names and boosts will automatically be prepended by "literal." and "boost." * as appropriate. Any keys from the $params array will NOT be treated this way. Any mappings from the document will overwrite key / value * pairs in the params array if they have the same name (e.g. you pass a "literal.id" key and value in your $params array but you also * pass in a document isntance with an "id" field" - the document's value(s) will take precedence). * * @param string $file Path to file to extract data from * @param array $params optional array of key value pairs that will be sent with the post (see Solr Cell documentation) * @param Apache_Solr_Document $document optional document that will be used to generate post parameters (literal.* and boost.* params) * @param string $mimetype optional mimetype specification (for the file being extracted) * * @return Apache_Solr_Response * * @throws Apache_Solr_InvalidArgumentException if $file, $params, or $document are invalid. */ public function extract($file, $params = array(), $document = null, $mimetype = 'application/octet-stream') { $service = $this->_selectWriteService(); do { try { return $service->extract($file, $params, $document, $mimetype); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Use Solr Cell to extract document contents. See {@link http://wiki.apache.org/solr/ExtractingRequestHandler} for information on how * to use Solr Cell and what parameters are available. * * NOTE: when passing an Apache_Solr_Document instance, field names and boosts will automatically be prepended by "literal." and "boost." * as appropriate. Any keys from the $params array will NOT be treated this way. Any mappings from the document will overwrite key / value * pairs in the params array if they have the same name (e.g. you pass a "literal.id" key and value in your $params array but you also * pass in a document isntance with an "id" field" - the document's value(s) will take precedence). * * @param string $data Data that will be passed to Solr Cell * @param array $params optional array of key value pairs that will be sent with the post (see Solr Cell documentation) * @param Apache_Solr_Document $document optional document that will be used to generate post parameters (literal.* and boost.* params) * @param string $mimetype optional mimetype specification (for the file being extracted) * * @return Apache_Solr_Response * * @throws Apache_Solr_InvalidArgumentException if $file, $params, or $document are invalid. * * @todo Should be using multipart/form-data to post parameter values, but I could not get my implementation to work. Needs revisisted. */ public function extractFromString($data, $params = array(), $document = null, $mimetype = 'application/octet-stream') { $service = $this->_selectWriteService(); do { try { return $service->extractFromString($data, $params, $document, $mimetype); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Send an optimize command. Will be synchronous unless both wait parameters are set * to false. * * @param boolean $waitFlush * @param boolean $waitSearcher * @param float $timeout Maximum expected duration of the optimize operation on the server (otherwise, will throw a communication exception) * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function optimize($waitFlush = true, $waitSearcher = true, $timeout = 3600) { $service = $this->_selectWriteService(); do { try { return $service->optimize($waitFlush, $waitSearcher, $timeout); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectWriteService(true); } while ($service); return false; } /** * Simple Search interface * * @param string $query The raw query string * @param int $offset The starting offset for result documents * @param int $limit The maximum number of result documents to return * @param array $params key / value pairs for query parameters, use arrays for multivalued parameters * @param string $method The HTTP method (Apache_Solr_Service::METHOD_GET or Apache_Solr_Service::METHOD::POST) * @return Apache_Solr_Response * * @throws Apache_Solr_HttpTransportException If an error occurs during the service call */ public function search($query, $offset = 0, $limit = 10, $params = array(), $method = Apache_Solr_Service::METHOD_GET) { $service = $this->_selectReadService(); do { try { return $service->search($query, $offset, $limit, $params, $method); } catch (Apache_Solr_HttpTransportException $e) { if ($e->getCode() != 0) //IF NOT COMMUNICATION ERROR { throw $e; } } $service = $this->_selectReadService(true); } while ($service); return false; } } |