LockingMiddleware::deliver() - Code Metrics - Inspection of "Require 100% code coverage" - Werkspot/message-bus - Measure and Improve Code Quality continuously with Scrutinizer

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by Herberto

created 2017-10-11 08:22 UTC

LockingMiddleware::deliver() A

↳ Parent: LockingMiddleware

Complexity

Conditions	3
Paths	4

Size

Total Lines	16
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
eloc	11
nc	4
nop	2
dl	0
loc	16
ccs	11
cts	11
cp	1
crap	3
rs	9.4285
c	0
b	0
f	0

<?php

declare(strict_types=1);

namespace Werkspot\MessageBus\Bus\DeliveryChain\Middleware;

use Exception;
use Werkspot\MessageBus\Bus\DeliveryChain\MiddlewareInterface;
use Werkspot\MessageBus\Message\MessageInterface;

/**
 * This middleware isolates the execution of subsequent commands
 * so we that they don't interfere on the execution of the
 * current command
 */
final class LockingMiddleware implements MiddlewareInterface
{
    /**
     * @var bool
     */
    private $executing = false;

    /**
     * @var callable[]
     */
    private $queue = [];

    public function deliver(MessageInterface $message, callable $next): void
    {
        $this->enqueue($message, $next);

        if ($this->executing) {
            return;
        }

        try {
            $this->executing = true;
            $this->processQueue();
        } catch (Exception $e) {
            $this->queue = [];
            throw $e;
        } finally {
            $this->executing = false;
        }
    }

    /**
     * Queues the execution of the next message instead of executing it
     * when it's added to the message bus
     */
    private function enqueue(MessageInterface $message, callable $next): void
    {
        $this->queue[] = function () use ($message, $next): void {
            $next($message);
        };
    }

    /**
     * Process one message at time so we can isolate their execution
     */
    private function processQueue(): void
    {
        while ($resumeMessage = array_shift($this->queue)) {
            $resumeMessage();
        }
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Werkspot\MessageBus\Bus\DeliveryChain\Middleware;
6
7		use Exception;
8		use Werkspot\MessageBus\Bus\DeliveryChain\MiddlewareInterface;
9		use Werkspot\MessageBus\Message\MessageInterface;
10
11		/**
12		* This middleware isolates the execution of subsequent commands
13		* so we that they don't interfere on the execution of the
14		* current command
15		*/
16		final class LockingMiddleware implements MiddlewareInterface
17		{
18		/**
19		* @var bool
20		*/
21		private $executing = false;
22
23		/**
24		* @var callable[]
25		*/
26		private $queue = [];
27
28	2	public function deliver(MessageInterface $message, callable $next): void
29		{
30	2	$this->enqueue($message, $next);
31
32	2	if ($this->executing) {
33	1	return;
34		}
35
36		try {
37	2	$this->executing = true;
38	2	$this->processQueue();
39	1	} catch (Exception $e) {
40	1	$this->queue = [];
41	1	throw $e;
42	1	} finally {
43	2	$this->executing = false;
44		}
45	1	}
46
47		/**
48		* Queues the execution of the next message instead of executing it
49		* when it's added to the message bus
50		*/
51		private function enqueue(MessageInterface $message, callable $next): void
52		{
53	2	$this->queue[] = function () use ($message, $next): void {
54	2	$next($message);
55	1	};
56	2	}
57
58		/**
59		* Process one message at time so we can isolate their execution
60		*/
61	2	private function processQueue(): void
62		{
63	2	while ($resumeMessage = array_shift($this->queue)) {
64	2	$resumeMessage();
65		}
66	1	}
67		}
68

Werkspot / message-bus

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LockingMiddleware::deliver() A

Complexity

Size

Duplication

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