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<?php |
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/* |
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* This file is part of the ONGR package. |
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* |
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* (c) NFQ Technologies UAB <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace ONGR\ElasticsearchBundle\Command; |
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use ONGR\ElasticsearchBundle\Service\IndexSuffixFinder; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Input\InputOption; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Style\SymfonyStyle; |
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/** |
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* Command for creating elasticsearch index. |
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*/ |
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class IndexCreateCommand extends AbstractManagerAwareCommand |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function configure() |
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{ |
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parent::configure(); |
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$this |
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->setName('ongr:es:index:create') |
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->setDescription('Creates elasticsearch index.') |
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->addOption('time', 't', InputOption::VALUE_NONE, 'Adds date suffix to the new index name') |
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->addOption( |
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'alias', |
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'a', |
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InputOption::VALUE_NONE, |
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'If the time suffix is used, its nice to create an alias to the configured index name.' |
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) |
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->addOption('no-mapping', null, InputOption::VALUE_NONE, 'Do not include mapping') |
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->addOption( |
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'if-not-exists', |
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null, |
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InputOption::VALUE_NONE, |
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'Don\'t trigger an error, when the index already exists' |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function execute(InputInterface $input, OutputInterface $output) |
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{ |
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$io = new SymfonyStyle($input, $output); |
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$manager = $this->getManager($input->getOption('manager')); |
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$originalIndexName = $manager->getIndexName(); |
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if ($input->getOption('time')) { |
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/** @var IndexSuffixFinder $finder */ |
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$finder = $this->getContainer()->get('es.client.index_suffix_finder'); |
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$finder->setNextFreeIndex($manager); |
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} |
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if ($input->getOption('if-not-exists') && $manager->indexExists()) { |
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$io->note( |
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sprintf( |
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'Index `%s` already exists in `%s` manager.', |
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$manager->getIndexName(), |
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$input->getOption('manager') |
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) |
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); |
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return 0; |
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} |
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$manager->createIndex($input->getOption('no-mapping')); |
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$io->text( |
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sprintf( |
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'Created `<comment>%s</comment>` index for the `<comment>%s</comment>` manager. ', |
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$manager->getIndexName(), |
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$input->getOption('manager') |
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) |
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); |
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if ($input->getOption('alias') && $originalIndexName != $manager->getIndexName()) { |
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$params['body'] = [ |
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'actions' => [ |
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[ |
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'add' => [ |
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'index' => $manager->getIndexName(), |
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'alias' => $originalIndexName, |
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] |
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] |
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] |
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]; |
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$message = 'Created an alias `<comment>'.$originalIndexName.'</comment>` for the `<comment>'. |
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$manager->getIndexName().'</comment>` index. '; |
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if ($manager->getClient()->indices()->existsAlias(['name' => $originalIndexName])) { |
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$currentAlias = $manager->getClient()->indices()->getAlias( |
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[ |
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'name' => $originalIndexName, |
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] |
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); |
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$indexesToRemoveAliases = implode(',', array_keys($currentAlias)); |
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if (!empty($indexesToRemoveAliases)) { |
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$params['body']['actions'][]['remove'] = [ |
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'index' => $indexesToRemoveAliases, |
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'alias' => $originalIndexName, |
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]; |
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$message .= 'Removed `<comment>'.$originalIndexName.'</comment>` alias from `<comment>'. |
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$indexesToRemoveAliases.'</comment>` index(es).'; |
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} |
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} |
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$manager->getClient()->indices()->updateAliases($params); |
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$io->text($message); |
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} |
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} |
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} |
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.