silverstripe-fulltextsearch/code/solr/reindex/handlers/SolrReindexImmediateHandler.php

<?php

use Psr\Log\LoggerInterface;

/**
 * Invokes an immediate reindex
 *
 * Internally batches of records will be invoked via shell tasks in the background
 */
class SolrReindexImmediateHandler extends SolrReindexBase
{
    public function triggerReindex(LoggerInterface $logger, $batchSize, $taskName, $classes = null)
    {
        $this->runReindex($logger, $batchSize, $taskName, $classes);
    }

    protected function processIndex(
        LoggerInterface $logger, SolrIndex $indexInstance, $batchSize, $taskName, $classes = null
    ) {
        parent::processIndex($logger, $indexInstance, $batchSize, $taskName, $classes);

        // Immediate processor needs to immediately commit after each index
        $indexInstance->getService()->commit();
    }

    /**
     * Process a single group.
     *
     * Without queuedjobs, it's necessary to shell this out to a background task as this is
     * very memory intensive.
     *
     * The sub-process will then invoke $processor->runGroup() in {@see Solr_Reindex::doReindex}
     *
     * @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
     */
    protected function processGroup(
        LoggerInterface $logger, SolrIndex $indexInstance, $state, $class, $groups, $group, $taskName
    ) {
        // Build state
        $statevar = json_encode($state);
        if (strpos(PHP_OS, "WIN") !== false) {
            $statevar = '"'.str_replace('"', '\\"', $statevar).'"';
        } else {
            $statevar = "'".$statevar."'";
        }

        // Build script
        $indexName = $indexInstance->getIndexName();
        $indexClass = get_class($indexInstance);
        $scriptPath = sprintf("%s%sframework%scli-script.php", BASE_PATH, DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR);
        $scriptTask = "php {$scriptPath} dev/tasks/{$taskName}";
        $cmd = "{$scriptTask} index={$indexClass} class={$class} group={$group} groups={$groups} variantstate={$statevar}";
        $cmd .= " verbose=1 2>&1";
        $logger->info("Running '$cmd'");

        // Execute script via shell
        $res = $logger ? passthru($cmd) : `$cmd`;
        if ($logger) {
            $logger->info(preg_replace('/\r\n|\n/', '$0  ', $res));
        }

        // If we're in dev mode, commit more often for fun and profit
        if (Director::isDev()) {
            Solr::service($indexClass)->commit();
        }

        // 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');
    }
}