/**
* Get name for new segment
*
* @return string
*/
private function _newSegmentName()
{
Zend_Search_Lucene_LockManager::obtainWriteLock($this->_directory);
$generation = Zend_Search_Lucene::getActualGeneration($this->_directory);
$segmentsFile = $this->_directory->getFileObject(Zend_Search_Lucene::getSegmentFileName($generation), false);
$segmentsFile->seek(12);
// 12 = 4 (int, file format marker) + 8 (long, index version)
$segmentNameCounter = $segmentsFile->readInt();
$segmentsFile->seek(12);
// 12 = 4 (int, file format marker) + 8 (long, index version)
$segmentsFile->writeInt($segmentNameCounter + 1);
// Flash output to guarantee that wrong value will not be loaded between unlock and
// return (which calls $segmentsFile destructor)
$segmentsFile->flush();
Zend_Search_Lucene_LockManager::releaseWriteLock($this->_directory);
return '_' . base_convert($segmentNameCounter, 10, 36);
}
/**
* Оптимизация индекса
*/
public function optimize()
{
$zsl = $this->get_index();
$zsl->optimize();
// ВНИМАНИЕ!!!
// Код, который следует далее, зависит от версии формата индекса Lucene
// и может перестать работать и/или приводить к возникновению ошибок
// в будущем при изменении формата, используемого Zend_Search_Lucene!
// После некорректного завершения переиндексирования могут остаться "лишние"
// файлы: устроим чистку...
try {
$path = $this->get_index_path();
//$directory = $zsl->getDirectory();
$directory = new Zend_Search_Lucene_Storage_Directory_Filesystem($path);
Zend_Search_Lucene_LockManager::obtainWriteLock($directory);
$generation = Zend_Search_Lucene::getActualGeneration($directory);
$files_to_keep = array("segments.gen", Zend_Search_Lucene_LockManager::WRITE_LOCK_FILE, Zend_Search_Lucene_LockManager::READ_LOCK_FILE, Zend_Search_Lucene_LockManager::READ_LOCK_PROCESSING_LOCK_FILE, Zend_Search_Lucene_LockManager::OPTIMIZATION_LOCK_FILE);
if ($generation > 0) {
$segments_file_name = Zend_Search_Lucene::getSegmentFileName($generation);
$files_to_keep[] = $segments_file_name;
$segments_file = $directory->getFileObject($segments_file_name);
// после оптимизации должен остаться только один сегмент
// найдём имя этого сегмента
$segments_file->seek(16);
// 4 (int, file format marker) + 8 (long, index version) + 4 (int, segment name counter)
$seg_count = $segments_file->readInt();
if ($seg_count == 1) {
$seg_name = $segments_file->readString();
$files_to_keep[] = "{$seg_name}.cfs";
$files_to_keep[] = "{$seg_name}.sti";
if ($seg_name && chdir($path)) {
$files_to_delete = array_diff(glob("*"), $files_to_keep);
foreach ($files_to_delete as $f) {
unlink($f);
}
}
}
}
} catch (Exception $e) {
// something went south, probably it was impossible to get the write lock
// or read some file
// trigger_error(get_class($e) . ": {$e->getMessage()}", E_USER_WARNING);
}
Zend_Search_Lucene_LockManager::releaseWriteLock($directory);
}
/**
* Get current generation number
*
* Returns generation number
* 0 means pre-2.1 index format
* -1 means there are no segments files.
*
* @param Zend_Search_Lucene_Storage_Directory $directory
* @return integer
* @throws Zend_Search_Lucene_Exception
*/
public static function getActualGeneration(Zend_Search_Lucene_Storage_Directory $directory)
{
Zend_Search_Lucene::getActualGeneration($directory);
}
private function _newSegmentName()
{
Zend_Search_Lucene_LockManager::obtainWriteLock($this->_directory);
$generation = Zend_Search_Lucene::getActualGeneration($this->_directory);
$segmentsFile = $this->_directory->getFileObject(Zend_Search_Lucene::getSegmentFileName($generation), false);
$segmentsFile->seek(12);
$segmentNameCounter = $segmentsFile->readInt();
$segmentsFile->seek(12);
$segmentsFile->writeInt($segmentNameCounter + 1);
$segmentsFile->flush();
Zend_Search_Lucene_LockManager::releaseWriteLock($this->_directory);
return '_' . base_convert($segmentNameCounter, 10, 36);
}
