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<?php
namespace Elastica\Tool;
use Elastica\Bulk;
use Elastica\Index;
use Elastica\Query\MatchAll;
use Elastica\ScanAndScroll;
use Elastica\Search;
use Elastica\Type;
/**
* Functions to move documents and types between indices.
*
* @author Manuel Andreo Garcia <andreo.garcia@gmail.com>
*/
class CrossIndex
{
/**
* Type option.
*
* type: string | string[] | \Elastica\Type | \Elastica\Type[] | null
* default: null (means all types)
*/
const OPTION_TYPE = 'type';
/**
* Query option.
*
* type: see \Elastica\Query::create()
* default: Elastica\Query\MatchAll
*/
const OPTION_QUERY = 'query';
/**
* Expiry time option.
*
* type: string (see Elastica\ScanAndScroll)
* default: '1m'
*/
const OPTION_EXPIRY_TIME = 'expiryTime';
/**
* Size per shard option.
*
* type: int (see Elastica\ScanAndScroll)
* default: 1000
*/
const OPTION_SIZE_PER_SHARD = 'sizePerShard';
/**
* Reindex documents from an old index to a new index.
*
* @link https://www.elastic.co/guide/en/elasticsearch/guide/master/reindex.html
*
* @param \Elastica\Index $oldIndex
* @param \Elastica\Index $newIndex
* @param array $options keys: CrossIndex::OPTION_* constants
*
* @return \Elastica\Index The new index object
*/
public static function reindex(
Index $oldIndex,
Index $newIndex,
array $options = array()
) {
// prepare search
$search = new Search($oldIndex->getClient());
$options = array_merge(
array(
self::OPTION_TYPE => null,
self::OPTION_QUERY => new MatchAll(),
self::OPTION_EXPIRY_TIME => '1m',
self::OPTION_SIZE_PER_SHARD => 1000,
),
$options
);
$search->addIndex($oldIndex);
if (isset($options[self::OPTION_TYPE])) {
$type = $options[self::OPTION_TYPE];
$search->addTypes(is_array($type) ? $type : array($type));
}
$search->setQuery($options[self::OPTION_QUERY]);
// search on old index and bulk insert in new index
$scanAndScroll = new ScanAndScroll(
$search,
$options[self::OPTION_EXPIRY_TIME],
$options[self::OPTION_SIZE_PER_SHARD]
);
foreach ($scanAndScroll as $resultSet) {
$bulk = new Bulk($newIndex->getClient());
$bulk->setIndex($newIndex);
foreach ($resultSet as $result) {
$action = new Bulk\Action();
$action->setType($result->getType());
$action->setId($result->getId());
$action->setSource($result->getData());
$bulk->addAction($action);
}
$bulk->send();
}
$newIndex->refresh();
return $newIndex;
}
/**
* Copies type mappings and documents from an old index to a new index.
*
* @see \Elastica\Tool\CrossIndex::reindex()
*
* @param \Elastica\Index $oldIndex
* @param \Elastica\Index $newIndex
* @param array $options keys: CrossIndex::OPTION_* constants
*
* @return \Elastica\Index The new index object
*/
public static function copy(
Index $oldIndex,
Index $newIndex,
array $options = array()
) {
// normalize types to array of string
$types = array();
if (isset($options[self::OPTION_TYPE])) {
$types = $options[self::OPTION_TYPE];
$types = is_array($types) ? $types : array($types);
$types = array_map(
function ($type) {
if ($type instanceof Type) {
$type = $type->getName();
}
return (string) $type;
},
$types
);
}
// copy mapping
foreach ($oldIndex->getMapping() as $type => $mapping) {
if (!empty($types) && !in_array($type, $types, true)) {
continue;
}
$type = new Type($newIndex, $type);
$type->setMapping($mapping['properties']);
}
// copy documents
return self::reindex($oldIndex, $newIndex, $options);
}
}
|
