scratch – Blame information for rev 120
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120 | office | 1 | <?php |
2 | |||
3 | /* |
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4 | * This file is part of the Monolog package. |
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5 | * |
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6 | * (c) Jordi Boggiano <j.boggiano@seld.be> |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |||
12 | namespace Monolog\Handler; |
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13 | |||
14 | /** |
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15 | * Sampling handler |
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16 | * |
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17 | * A sampled event stream can be useful for logging high frequency events in |
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18 | * a production environment where you only need an idea of what is happening |
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19 | * and are not concerned with capturing every occurrence. Since the decision to |
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20 | * handle or not handle a particular event is determined randomly, the |
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21 | * resulting sampled log is not guaranteed to contain 1/N of the events that |
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22 | * occurred in the application, but based on the Law of large numbers, it will |
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23 | * tend to be close to this ratio with a large number of attempts. |
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24 | * |
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25 | * @author Bryan Davis <bd808@wikimedia.org> |
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26 | * @author Kunal Mehta <legoktm@gmail.com> |
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27 | */ |
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28 | class SamplingHandler extends AbstractHandler |
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29 | { |
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30 | /** |
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31 | * @var callable|HandlerInterface $handler |
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32 | */ |
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33 | protected $handler; |
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34 | |||
35 | /** |
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36 | * @var int $factor |
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37 | */ |
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38 | protected $factor; |
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39 | |||
40 | /** |
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41 | * @param callable|HandlerInterface $handler Handler or factory callable($record, $fingersCrossedHandler). |
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42 | * @param int $factor Sample factor |
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43 | */ |
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44 | public function __construct($handler, $factor) |
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45 | { |
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46 | parent::__construct(); |
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47 | $this->handler = $handler; |
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48 | $this->factor = $factor; |
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49 | |||
50 | if (!$this->handler instanceof HandlerInterface && !is_callable($this->handler)) { |
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51 | throw new \RuntimeException("The given handler (".json_encode($this->handler).") is not a callable nor a Monolog\Handler\HandlerInterface object"); |
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52 | } |
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53 | } |
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54 | |||
55 | public function isHandling(array $record) |
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56 | { |
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57 | return $this->handler->isHandling($record); |
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58 | } |
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59 | |||
60 | public function handle(array $record) |
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61 | { |
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62 | if ($this->isHandling($record) && mt_rand(1, $this->factor) === 1) { |
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63 | // The same logic as in FingersCrossedHandler |
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64 | if (!$this->handler instanceof HandlerInterface) { |
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65 | $this->handler = call_user_func($this->handler, $record, $this); |
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66 | if (!$this->handler instanceof HandlerInterface) { |
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67 | throw new \RuntimeException("The factory callable should return a HandlerInterface"); |
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68 | } |
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69 | } |
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70 | |||
71 | if ($this->processors) { |
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72 | foreach ($this->processors as $processor) { |
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73 | $record = call_user_func($processor, $record); |
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74 | } |
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75 | } |
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76 | |||
77 | $this->handler->handle($record); |
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78 | } |
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79 | |||
80 | return false === $this->bubble; |
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81 | } |
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82 | } |