silverstripe-fulltextsearch/code/solr/reindex/handlers/SolrReindexBase.php
2017-04-21 13:18:37 +12:00

239 lines
8.3 KiB
PHP

<?php
namespace SilverStripe\FullTextSearch\Solr\Reindex\Handlers;
use Psr\Log\LoggerInterface;
use SilverStripe\FullTextSearch\Solr\Solr;
use SilverStripe\FullTextSearch\Solr\SolrIndex;
/**
* Base class for re-indexing of solr content
*/
abstract class SolrReindexBase implements SolrReindexHandler
{
public function runReindex(LoggerInterface $logger, $batchSize, $taskName, $classes = null)
{
foreach (Solr::get_indexes() as $indexInstance) {
$this->processIndex($logger, $indexInstance, $batchSize, $taskName, $classes);
}
}
/**
* Process index for a single SolrIndex instance
*
* @param LoggerInterface $logger
* @param SolrIndex $indexInstance
* @param int $batchSize
* @param string $taskName
* @param string $classes
*/
protected function processIndex(
LoggerInterface $logger, SolrIndex $indexInstance, $batchSize, $taskName, $classes = null
) {
// Filter classes for this index
$indexClasses = $this->getClassesForIndex($indexInstance, $classes);
// Clear all records in this index which do not contain the given classes
$logger->info("Clearing obsolete classes from ".$indexInstance->getIndexName());
$indexInstance->clearObsoleteClasses($indexClasses);
// Build queue for each class
foreach ($indexClasses as $class => $options) {
$includeSubclasses = $options['include_children'];
foreach (SearchVariant::reindex_states($class, $includeSubclasses) as $state) {
$this->processVariant($logger, $indexInstance, $state, $class, $includeSubclasses, $batchSize, $taskName);
}
}
}
/**
* Get valid classes and options for an index with an optional filter
*
* @param SolrIndex $index
* @param string|array $filterClasses Optional class or classes to limit to
* @return array List of classes, where the key is the classname and value is list of options
*/
protected function getClassesForIndex(SolrIndex $index, $filterClasses = null)
{
// Get base classes
$classes = $index->getClasses();
if (!$filterClasses) {
return $classes;
}
// Apply filter
if (!is_array($filterClasses)) {
$filterClasses = explode(',', $filterClasses);
}
return array_intersect_key($classes, array_combine($filterClasses, $filterClasses));
}
/**
* Process re-index for a given variant state and class
*
* @param LoggerInterface $logger
* @param SolrIndex $indexInstance
* @param array $state Variant state
* @param string $class
* @param bool $includeSubclasses
* @param int $batchSize
* @param string $taskName
*/
protected function processVariant(
LoggerInterface $logger, SolrIndex $indexInstance, $state,
$class, $includeSubclasses, $batchSize, $taskName
) {
// Set state
SearchVariant::activate_state($state);
// Count records
$query = $class::get();
if (!$includeSubclasses) {
$query = $query->filter('ClassName', $class);
}
$total = $query->count();
// Skip this variant if nothing to process, or if there are no records
if ($total == 0 || $indexInstance->variantStateExcluded($state)) {
// Remove all records in the current state, since there are no groups to process
$logger->info("Clearing all records of type {$class} in the current state: " . json_encode($state));
$this->clearRecords($indexInstance, $class);
return;
}
// For each group, run processing
$groups = (int)(($total + $batchSize - 1) / $batchSize);
for ($group = 0; $group < $groups; $group++) {
$this->processGroup($logger, $indexInstance, $state, $class, $groups, $group, $taskName);
}
}
/**
* Initiate the processing of a single group
*
* @param LoggerInterface $logger
* @param SolrIndex $indexInstance Index instance
* @param array $state Variant state
* @param string $class Class to index
* @param int $groups Total groups
* @param int $group Index of group to process
* @param string $taskName Name of task script to run
*/
abstract protected function processGroup(
LoggerInterface $logger, SolrIndex $indexInstance, $state, $class, $groups, $group, $taskName
);
/**
* Explicitly invoke the process that performs the group
* processing. Can be run either by a background task or a queuedjob.
*
* Does not commit changes to the index, so this must be controlled externally.
*
* @param LoggerInterface $logger
* @param SolrIndex $indexInstance
* @param array $state
* @param string $class
* @param int $groups
* @param int $group
*/
public function runGroup(
LoggerInterface $logger, SolrIndex $indexInstance, $state, $class, $groups, $group
) {
// Set time limit and state
increase_time_limit_to();
SearchVariant::activate_state($state);
$logger->info("Adding $class");
// Prior to adding these records to solr, delete existing solr records
$this->clearRecords($indexInstance, $class, $groups, $group);
// Process selected records in this class
$items = $this->getRecordsInGroup($indexInstance, $class, $groups, $group);
$processed = array();
foreach ($items as $item) {
$processed[] = $item->ID;
// By this point, obsolete classes/states have been removed in processVariant
// and obsolete records have been removed in clearRecords
$indexInstance->add($item);
$item->destroy();
}
$logger->info("Updated ".implode(',', $processed));
// This will slow down things a tiny bit, but it is done so that we don't timeout to the database during a reindex
DB::query('SELECT 1');
$logger->info("Done");
}
/**
* Gets the datalist of records in the given group in the current state
*
* Assumes that the desired variant state is in effect.
*
* @param SolrIndex $indexInstance
* @param string $class
* @param int $groups
* @param int $group
* @return DataList
*/
protected function getRecordsInGroup(SolrIndex $indexInstance, $class, $groups, $group)
{
// Generate filtered list of local records
$baseClass = ClassInfo::baseDataClass($class);
$items = DataList::create($class)
->where(sprintf(
'"%s"."ID" %% \'%d\' = \'%d\'',
$baseClass,
intval($groups),
intval($group)
))
->sort("ID");
// Add child filter
$classes = $indexInstance->getClasses();
$options = $classes[$class];
if (!$options['include_children']) {
$items = $items->filter('ClassName', $class);
}
return $items;
}
/**
* Clear all records of the given class in the current state ONLY.
*
* Optionally delete from a given group (where the group is defined as the ID % total groups)
*
* @param SolrIndex $indexInstance Index instance
* @param string $class Class name
* @param int $groups Number of groups, if clearing from a striped group
* @param int $group Group number, if clearing from a striped group
*/
protected function clearRecords(SolrIndex $indexInstance, $class, $groups = null, $group = null)
{
// Clear by classname
$conditions = array("+(ClassHierarchy:{$class})");
// If grouping, delete from this group only
if ($groups) {
$conditions[] = "+_query_:\"{!frange l={$group} u={$group}}mod(ID, {$groups})\"";
}
// Also filter by state (suffix on document ID)
$query = new SearchQuery();
SearchVariant::with($class)
->call('alterQuery', $query, $indexInstance);
if ($query->isfiltered()) {
$conditions = array_merge($conditions, $indexInstance->getFiltersComponent($query));
}
// Invoke delete on index
$deleteQuery = implode(' ', $conditions);
$indexInstance
->getService()
->deleteByQuery($deleteQuery);
}
}