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1<?php
2
3namespace CirrusSearch\Maintenance\Validators;
4
5use CirrusSearch\Maintenance\Printer;
6use Elastica\Index;
7use RawMessage;
8use Status;
9
10class NumberOfShardsValidator extends Validator {
11    /**
12     * @var Index
13     */
14    private $index;
15
16    /**
17     * @var int
18     */
19    protected $shardCount;
20
21    /**
22     * @param Index $index
23     * @param int $shardCount
24     * @param Printer|null $out
25     */
26    public function __construct( Index $index, $shardCount, Printer $out = null ) {
27        parent::__construct( $out );
28
29        $this->index = $index;
30        $this->shardCount = $shardCount;
31    }
32
33    /**
34     * @return Status
35     */
36    public function validate() {
37        $this->outputIndented( "\tValidating number of shards..." );
38        $settings = $this->index->getSettings()->get();
39        // @phan-suppress-next-line PhanTypeArraySuspiciousNullable
40        $actualShardCount = $settings['number_of_shards'];
41        if ( $actualShardCount == $this->shardCount ) {
42            $this->output( "ok\n" );
43        } else {
44            $this->output( "is $actualShardCount but should be " . $this->shardCount . "...cannot correct!\n" );
45            return Status::newFatal( new RawMessage(
46                "Number of shards is incorrect and cannot be changed without a rebuild. You can solve this\n" .
47                "problem by running this program again with either --startOver or --reindexAndRemoveOk.  Make\n" .
48                "sure you understand the consequences of either choice..  This script will now continue to\n" .
49                "validate everything else." ) );
50        }
51
52        return Status::newGood();
53    }
54}