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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\WRStats; |
| 4 | |
| 5 | /** |
| 6 | * A class representing a batch of increment/peek operations on a WRStatsRateLimiter |
| 7 | * |
| 8 | * @since 1.39 |
| 9 | */ |
| 10 | class LimitBatch { |
| 11 | /** @var WRStatsRateLimiter */ |
| 12 | private $limiter; |
| 13 | |
| 14 | /** @var int */ |
| 15 | private $defaultAmount; |
| 16 | |
| 17 | /** @var LimitOperation[] */ |
| 18 | private $operations = []; |
| 19 | |
| 20 | /** |
| 21 | * @internal Use WRStatsFactory::createRateLimiter()->createBatch() instead |
| 22 | * @param WRStatsRateLimiter $limiter |
| 23 | * @param int $defaultAmount |
| 24 | */ |
| 25 | public function __construct( |
| 26 | WRStatsRateLimiter $limiter, |
| 27 | $defaultAmount |
| 28 | ) { |
| 29 | $this->limiter = $limiter; |
| 30 | $this->defaultAmount = $defaultAmount; |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * Construct a local entity key and queue an operation for it. |
| 35 | * |
| 36 | * @param string $condName The condition name to be incremented/tested, |
| 37 | * which must match one of the ones passed to createRateLimiter() |
| 38 | * @param mixed $components Entity key component or array of components |
| 39 | * @param int|null $amount The amount to increment by, or null to use the default |
| 40 | * @return $this |
| 41 | */ |
| 42 | public function localOp( $condName, $components = [], $amount = null ) { |
| 43 | if ( !is_array( $components ) ) { |
| 44 | $components = [ $components ]; |
| 45 | } |
| 46 | $this->queueOp( |
| 47 | $condName, |
| 48 | new LocalEntityKey( [ $condName, ...$components ] ), |
| 49 | $amount |
| 50 | ); |
| 51 | return $this; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Construct a global entity key and queue an operation for it. |
| 56 | * |
| 57 | * @param string $condName The condition name to be incremented/tested, |
| 58 | * which must match one of the ones passed to createRateLimiter() |
| 59 | * @param mixed $components Entity key components |
| 60 | * @param int|null $amount The amount, or null to use the default |
| 61 | * @return $this |
| 62 | */ |
| 63 | public function globalOp( $condName, $components = [], $amount = null ) { |
| 64 | if ( !is_array( $components ) ) { |
| 65 | $components = [ $components ]; |
| 66 | } |
| 67 | $this->queueOp( |
| 68 | $condName, |
| 69 | new GlobalEntityKey( [ $condName, ...$components ] ), |
| 70 | $amount |
| 71 | ); |
| 72 | return $this; |
| 73 | } |
| 74 | |
| 75 | private function queueOp( string $type, ?EntityKey $entity, ?int $amount ) { |
| 76 | $amount ??= $this->defaultAmount; |
| 77 | if ( isset( $this->operations[$type] ) ) { |
| 78 | throw new WRStatsError( 'Cannot queue multiple actions of the same type, ' . |
| 79 | 'because the result array is indexed by type' ); |
| 80 | } |
| 81 | $this->operations[$type] = new LimitOperation( $type, $entity, $amount ); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Execute the batch, checking each operation against the defined limit, |
| 86 | * but don't actually increment the metrics. |
| 87 | * |
| 88 | * @return LimitBatchResult |
| 89 | */ |
| 90 | public function peek() { |
| 91 | return $this->limiter->peekBatch( $this->operations ); |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Execute the batch, unconditionally incrementing all the specified metrics. |
| 96 | */ |
| 97 | public function incr() { |
| 98 | $this->limiter->incrBatch( $this->operations ); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Execute the batch, checking each operation against the defined limit. |
| 103 | * If all operations are allowed, all metrics will be incremented. If some |
| 104 | * of the operations exceed the limit, none of the metrics will be |
| 105 | * incremented. |
| 106 | * |
| 107 | * @return LimitBatchResult |
| 108 | */ |
| 109 | public function tryIncr() { |
| 110 | return $this->limiter->tryIncrBatch( $this->operations ); |
| 111 | } |
| 112 | } |