AMQPBackend - Code Metrics - Inspection of "Bump phpunit bridge to the latest version" - sonata-project/SonataNotificationBundle - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 67a92e...b03a00 )

by Grégoire

created 2018-11-29 07:10 UTC

AMQPBackend A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	250
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	14

Importance

Changes

Metric	Value
wmc	21
lcom	1
cbo	14
dl	0
loc	250
rs	10
c	0
b	0
f	0

11 Methods

Rating	Name	Size	Complexity
A	__construct()	11	1
A	setDispatcher()	4	1
B	initialize()	36	6
A	publish()	19	1
A	create()	9	1
A	createAndPublish()	4	1
A	getIterator()	13	2
A	handle()	30	3
A	getStatus()	10	2
A	cleanup()	4	1
A	getContext()	8	2

<?php

declare(strict_types=1);

/*
 * This file is part of the Sonata Project package.
 *
 * (c) Thomas Rabaix <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Sonata\NotificationBundle\Backend;

use Interop\Amqp\AmqpConsumer;
use Interop\Amqp\AmqpContext;
use Interop\Amqp\AmqpMessage;
use Interop\Amqp\AmqpQueue;
use Interop\Amqp\AmqpTopic;
use Interop\Amqp\Impl\AmqpBind;
use Sonata\NotificationBundle\Consumer\ConsumerEvent;
use Sonata\NotificationBundle\Exception\HandlingException;
use Sonata\NotificationBundle\Iterator\AMQPMessageIterator;
use Sonata\NotificationBundle\Model\Message;
use Sonata\NotificationBundle\Model\MessageInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use ZendDiagnostics\Result\Failure;
use ZendDiagnostics\Result\Success;

/**
 * Consumer side of the rabbitMQ backend.
 */
class AMQPBackend implements BackendInterface
{
    /**
     * @var AMQPBackendDispatcher
     */
    private $dispatcher = null;

    /**
     * @var string
     */
    private $exchange;

    /**
     * @var string
     */
    private $queue;

    /**
     * @var string
     */
    private $key;

    /**
     * @var string
     */
    private $recover;

    /**
     * @var null|string
     */
    private $deadLetterExchange;

    /**
     * @var null|string
     */
    private $deadLetterRoutingKey;

    /**
     * @var null|int
     */
    private $ttl;

    /**
     * @var null|int
     */
    private $prefetchCount;

    /**
     * @var AmqpConsumer
     */
    private $consumer;

    /**
     * @param string   $exchange
     * @param string   $queue
     * @param string   $recover
     * @param string   $key
     * @param string   $deadLetterExchange
     * @param string   $deadLetterRoutingKey
     * @param null|int $ttl
     */
    public function __construct($exchange, $queue, $recover, $key, $deadLetterExchange = null, $deadLetterRoutingKey = null, $ttl = null, $prefetchCount = null)
    {
        $this->exchange = $exchange;
        $this->queue = $queue;
        $this->recover = $recover;
        $this->key = $key;
        $this->deadLetterExchange = $deadLetterExchange;
        $this->deadLetterRoutingKey = $deadLetterRoutingKey;
        $this->ttl = $ttl;
        $this->prefetchCount = $prefetchCount;
    }

    /**
     * @param AMQPBackendDispatcher $dispatcher
     */
    public function setDispatcher(AMQPBackendDispatcher $dispatcher): void
    {
        $this->dispatcher = $dispatcher;
    }

    /**
     * {@inheritdoc}
     */
    public function initialize(): void
    {
        $args = [];
        if (null !== $this->deadLetterExchange) {
            $args['x-dead-letter-exchange'] = $this->deadLetterExchange;

            if (null !== $this->deadLetterRoutingKey) {
                $args['x-dead-letter-routing-key'] = $this->deadLetterRoutingKey;
            }
        }

        if (null !== $this->ttl) {
            $args['x-message-ttl'] = $this->ttl;
        }

        $queue = $this->getContext()->createQueue($this->queue);
        $queue->addFlag(AmqpQueue::FLAG_DURABLE);
        $queue->setArguments($args);
        $this->getContext()->declareQueue($queue);


        $topic = $this->getContext()->createTopic($this->exchange);
        $topic->setType(AmqpTopic::TYPE_DIRECT);
        $topic->addFlag(AmqpTopic::FLAG_DURABLE);
        $this->getContext()->declareTopic($topic);


        $this->getContext()->bind(new AmqpBind($queue, $topic, $this->key));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

        if (null !== $this->deadLetterExchange && null === $this->deadLetterRoutingKey) {
            $deadLetterTopic = $this->getContext()->createTopic($this->deadLetterExchange);
            $deadLetterTopic->setType(AmqpTopic::TYPE_DIRECT);
            $deadLetterTopic->addFlag(AmqpTopic::FLAG_DURABLE);
            $this->getContext()->declareTopic($deadLetterTopic);


            $this->getContext()->bind(new AmqpBind($queue, $deadLetterTopic, $this->key));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function publish(MessageInterface $message): void
    {
        $body = json_encode([
            'type' => $message->getType(),
            'body' => $message->getBody(),
            'createdAt' => $message->getCreatedAt()->format('U'),
            'state' => $message->getState(),
        ]);

        $amqpMessage = $this->getContext()->createMessage($body);
        $amqpMessage->setContentType('text/plain'); // application/json ?
        $amqpMessage->setTimestamp($message->getCreatedAt()->format('U'));
        $amqpMessage->setDeliveryMode(AmqpMessage::DELIVERY_MODE_PERSISTENT);
        $amqpMessage->setRoutingKey($this->key);

        $topic = $this->getContext()->createTopic($this->exchange);

        $this->getContext()->createProducer()->send($topic, $amqpMessage);
    }

    /**
     * {@inheritdoc}
     */
    public function create($type, array $body)
    {
        $message = new Message();
        $message->setType($type);
        $message->setBody($body);
        $message->setState(MessageInterface::STATE_OPEN);

        return $message;
    }

    /**
     * {@inheritdoc}
     */
    public function createAndPublish($type, array $body): void
    {
        $this->publish($this->create($type, $body));
    }

    /**
     * {@inheritdoc}
     */
    public function getIterator()
    {
        $context = $this->getContext();

        if (null !== $this->prefetchCount) {
            $context->setQos(null, $this->prefetchCount, false);
        }

        $this->consumer = $this->getContext()->createConsumer($this->getContext()->createQueue($this->queue));
        $this->consumer->setConsumerTag('sonata_notification_'.uniqid());

        return new AMQPMessageIterator($this->consumer);
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * {@inheritdoc}
     */
    public function handle(MessageInterface $message, EventDispatcherInterface $dispatcher): void
    {
        $event = new ConsumerEvent($message);

        /** @var AmqpMessage $amqpMessage */
        $amqpMessage = $message->getValue('interopMessage');

        try {
            $dispatcher->dispatch($message->getType(), $event);

            $this->consumer->acknowledge($amqpMessage);

            $message->setCompletedAt(new \DateTime());
            $message->setState(MessageInterface::STATE_DONE);
        } catch (HandlingException $e) {
            $message->setCompletedAt(new \DateTime());
            $message->setState(MessageInterface::STATE_ERROR);

            $this->consumer->acknowledge($amqpMessage);

            throw new HandlingException('Error while handling a message', 0, $e);
        } catch (\Exception $e) {
            $message->setCompletedAt(new \DateTime());
            $message->setState(MessageInterface::STATE_ERROR);

            $this->consumer->reject($amqpMessage, $this->recover);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

            throw new HandlingException('Error while handling a message', 0, $e);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function getStatus()
    {
        try {
            $this->getContext();
        } catch (\Exception $e) {
            return new Failure($e->getMessage());
        }

        return new Success('Channel is running (RabbitMQ)');
    }

    /**
     * {@inheritdoc}
     */
    public function cleanup(): void
    {
        throw new \RuntimeException('Not implemented');
    }

    /**
     * @return AmqpContext
     */
    private function getContext()
    {
        if (null === $this->dispatcher) {
            throw new \RuntimeException('Unable to retrieve AMQP context without dispatcher.');
        }

        return $this->dispatcher->getContext();
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			/*
6			* This file is part of the Sonata Project package.
7			*
8			* (c) Thomas Rabaix <[email protected]>
9			*
10			* For the full copyright and license information, please view the LICENSE
11			* file that was distributed with this source code.
12			*/
13
14			namespace Sonata\NotificationBundle\Backend;
15
16			use Interop\Amqp\AmqpConsumer;
17			use Interop\Amqp\AmqpContext;
18			use Interop\Amqp\AmqpMessage;
19			use Interop\Amqp\AmqpQueue;
20			use Interop\Amqp\AmqpTopic;
21			use Interop\Amqp\Impl\AmqpBind;
22			use Sonata\NotificationBundle\Consumer\ConsumerEvent;
23			use Sonata\NotificationBundle\Exception\HandlingException;
24			use Sonata\NotificationBundle\Iterator\AMQPMessageIterator;
25			use Sonata\NotificationBundle\Model\Message;
26			use Sonata\NotificationBundle\Model\MessageInterface;
27			use Symfony\Component\EventDispatcher\EventDispatcherInterface;
28			use ZendDiagnostics\Result\Failure;
29			use ZendDiagnostics\Result\Success;
30
31			/**
32			* Consumer side of the rabbitMQ backend.
33			*/
34			class AMQPBackend implements BackendInterface
35			{
36			/**
37			* @var AMQPBackendDispatcher
38			*/
39			private $dispatcher = null;
40
41			/**
42			* @var string
43			*/
44			private $exchange;
45
46			/**
47			* @var string
48			*/
49			private $queue;
50
51			/**
52			* @var string
53			*/
54			private $key;
55
56			/**
57			* @var string
58			*/
59			private $recover;
60
61			/**
62			* @var null\|string
63			*/
64			private $deadLetterExchange;
65
66			/**
67			* @var null\|string
68			*/
69			private $deadLetterRoutingKey;
70
71			/**
72			* @var null\|int
73			*/
74			private $ttl;
75
76			/**
77			* @var null\|int
78			*/
79			private $prefetchCount;
80
81			/**
82			* @var AmqpConsumer
83			*/
84			private $consumer;
85
86			/**
87			* @param string $exchange
88			* @param string $queue
89			* @param string $recover
90			* @param string $key
91			* @param string $deadLetterExchange
92			* @param string $deadLetterRoutingKey
93			* @param null\|int $ttl
94			*/
95			public function __construct($exchange, $queue, $recover, $key, $deadLetterExchange = null, $deadLetterRoutingKey = null, $ttl = null, $prefetchCount = null)
96			{
97			$this->exchange = $exchange;
98			$this->queue = $queue;
99			$this->recover = $recover;
100			$this->key = $key;
101			$this->deadLetterExchange = $deadLetterExchange;
102			$this->deadLetterRoutingKey = $deadLetterRoutingKey;
103			$this->ttl = $ttl;
104			$this->prefetchCount = $prefetchCount;
105			}
106
107			/**
108			* @param AMQPBackendDispatcher $dispatcher
109			*/
110			public function setDispatcher(AMQPBackendDispatcher $dispatcher): void
111			{
112			$this->dispatcher = $dispatcher;
113			}
114
115			/**
116			* {@inheritdoc}
117			*/
118			public function initialize(): void
119			{
120			$args = [];
121			if (null !== $this->deadLetterExchange) {
122			$args['x-dead-letter-exchange'] = $this->deadLetterExchange;
123
124			if (null !== $this->deadLetterRoutingKey) {
125			$args['x-dead-letter-routing-key'] = $this->deadLetterRoutingKey;
126			}
127			}
128
129			if (null !== $this->ttl) {
130			$args['x-message-ttl'] = $this->ttl;
131			}
132
133			$queue = $this->getContext()->createQueue($this->queue);
134			$queue->addFlag(AmqpQueue::FLAG_DURABLE);
135			$queue->setArguments($args);
136			$this->getContext()->declareQueue($queue);
			0 ignored issues – show Compatibility introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$queue` of type `object<Interop\Queue\PsrQueue>` is not a sub-type of `object<Interop\Amqp\AmqpQueue>`. It seems like you assume a child interface of the interface `Interop\Queue\PsrQueue` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
137
138			$topic = $this->getContext()->createTopic($this->exchange);
139			$topic->setType(AmqpTopic::TYPE_DIRECT);
140			$topic->addFlag(AmqpTopic::FLAG_DURABLE);
141			$this->getContext()->declareTopic($topic);
			0 ignored issues – show Compatibility introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$topic` of type `object<Interop\Queue\PsrTopic>` is not a sub-type of `object<Interop\Amqp\AmqpTopic>`. It seems like you assume a child interface of the interface `Interop\Queue\PsrTopic` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
142
143			$this->getContext()->bind(new AmqpBind($queue, $topic, $this->key));
			0 ignored issues – show Documentation introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$queue` is of type `object<Interop\Queue\PsrQueue>`, but the function expects a `object<Interop\Amqp\AmqpDestination>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history... Documentation introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$topic` is of type `object<Interop\Queue\PsrTopic>`, but the function expects a `object<Interop\Amqp\AmqpDestination>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
144
145			if (null !== $this->deadLetterExchange && null === $this->deadLetterRoutingKey) {
146			$deadLetterTopic = $this->getContext()->createTopic($this->deadLetterExchange);
147			$deadLetterTopic->setType(AmqpTopic::TYPE_DIRECT);
148			$deadLetterTopic->addFlag(AmqpTopic::FLAG_DURABLE);
149			$this->getContext()->declareTopic($deadLetterTopic);
			0 ignored issues – show Compatibility introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$deadLetterTopic` of type `object<Interop\Queue\PsrTopic>` is not a sub-type of `object<Interop\Amqp\AmqpTopic>`. It seems like you assume a child interface of the interface `Interop\Queue\PsrTopic` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
150
151			$this->getContext()->bind(new AmqpBind($queue, $deadLetterTopic, $this->key));
			0 ignored issues – show Documentation introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$queue` is of type `object<Interop\Queue\PsrQueue>`, but the function expects a `object<Interop\Amqp\AmqpDestination>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history... Documentation introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$deadLetterTopic` is of type `object<Interop\Queue\PsrTopic>`, but the function expects a `object<Interop\Amqp\AmqpDestination>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
152			}
153			}
154
155			/**
156			* {@inheritdoc}
157			*/
158			public function publish(MessageInterface $message): void
159			{
160			$body = json_encode([
161			'type' => $message->getType(),
162			'body' => $message->getBody(),
163			'createdAt' => $message->getCreatedAt()->format('U'),
164			'state' => $message->getState(),
165			]);
166
167			$amqpMessage = $this->getContext()->createMessage($body);
168			$amqpMessage->setContentType('text/plain'); // application/json ?
169			$amqpMessage->setTimestamp($message->getCreatedAt()->format('U'));
170			$amqpMessage->setDeliveryMode(AmqpMessage::DELIVERY_MODE_PERSISTENT);
171			$amqpMessage->setRoutingKey($this->key);
172
173			$topic = $this->getContext()->createTopic($this->exchange);
174
175			$this->getContext()->createProducer()->send($topic, $amqpMessage);
176			}
177
178			/**
179			* {@inheritdoc}
180			*/
181			public function create($type, array $body)
182			{
183			$message = new Message();
184			$message->setType($type);
185			$message->setBody($body);
186			$message->setState(MessageInterface::STATE_OPEN);
187
188			return $message;
189			}
190
191			/**
192			* {@inheritdoc}
193			*/
194			public function createAndPublish($type, array $body): void
195			{
196			$this->publish($this->create($type, $body));
197			}
198
199			/**
200			* {@inheritdoc}
201			*/
202			public function getIterator()
203			{
204			$context = $this->getContext();
205
206			if (null !== $this->prefetchCount) {
207			$context->setQos(null, $this->prefetchCount, false);
208			}
209
210			$this->consumer = $this->getContext()->createConsumer($this->getContext()->createQueue($this->queue));
211			$this->consumer->setConsumerTag('sonata_notification_'.uniqid());
212
213			return new AMQPMessageIterator($this->consumer);
			0 ignored issues – show Compatibility introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$this->consumer` of type `object<Interop\Queue\PsrConsumer>` is not a sub-type of `object<Interop\Amqp\AmqpConsumer>`. It seems like you assume a child interface of the interface `Interop\Queue\PsrConsumer` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history... Bug Best Practice introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report The return type of `return new \Sonata\Notif...rator($this->consumer);` (`Sonata\NotificationBundl...tor\AMQPMessageIterator`) is incompatible with the return type declared by the interface `Sonata\NotificationBundl...dInterface::getIterator` of type `Sonata\NotificationBundl...essageIteratorInterface`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
214			}
215
216			/**
217			* {@inheritdoc}
218			*/
219			public function handle(MessageInterface $message, EventDispatcherInterface $dispatcher): void
220			{
221			$event = new ConsumerEvent($message);
222
223			/** @var AmqpMessage $amqpMessage */
224			$amqpMessage = $message->getValue('interopMessage');
225
226			try {
227			$dispatcher->dispatch($message->getType(), $event);
228
229			$this->consumer->acknowledge($amqpMessage);
230
231			$message->setCompletedAt(new \DateTime());
232			$message->setState(MessageInterface::STATE_DONE);
233			} catch (HandlingException $e) {
234			$message->setCompletedAt(new \DateTime());
235			$message->setState(MessageInterface::STATE_ERROR);
236
237			$this->consumer->acknowledge($amqpMessage);
238
239			throw new HandlingException('Error while handling a message', 0, $e);
240			} catch (\Exception $e) {
241			$message->setCompletedAt(new \DateTime());
242			$message->setState(MessageInterface::STATE_ERROR);
243
244			$this->consumer->reject($amqpMessage, $this->recover);
			0 ignored issues – show Documentation introduced 2017-11-10 13:43 UTC by Report Bug Copy Issue Report `$this->recover` is of type `string`, but the function expects a `boolean`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
245
246			throw new HandlingException('Error while handling a message', 0, $e);
247			}
248			}
249
250			/**
251			* {@inheritdoc}
252			*/
253			public function getStatus()
254			{
255			try {
256			$this->getContext();
257			} catch (\Exception $e) {
258			return new Failure($e->getMessage());
259			}
260
261			return new Success('Channel is running (RabbitMQ)');
262			}
263
264			/**
265			* {@inheritdoc}
266			*/
267			public function cleanup(): void
268			{
269			throw new \RuntimeException('Not implemented');
270			}
271
272			/**
273			* @return AmqpContext
274			*/
275			private function getContext()
276			{
277			if (null === $this->dispatcher) {
278			throw new \RuntimeException('Unable to retrieve AMQP context without dispatcher.');
279			}
280
281			return $this->dispatcher->getContext();
282			}
283			}
284

sonata-project / SonataNotificationBundle

Push — master ( 67a92e...b03a00 )

AMQPBackend A

Complexity

Size/Duplication

Coupling/Cohesion

Importance

11 Methods

Duplication Side-by-Side

Filter issues like