ConnectionFactory::createPdoResolver() - Code Metrics - PuShaoWei/SimpleEloquent - Measure and Improve Code Quality continuously with Scrutinizer

ConnectionFactory::createPdoResolver() A
last analyzed 2017-12-14 05:20 UTC

↳ Parent: ConnectionFactory

Complexity

Conditions	2
Paths	2

Size

Total Lines	6
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	6
rs	9.4285
c	0
b	0
f	0
cc	2
eloc	4
nc	2
nop	1

<?php
namespace Childish\connection;

use PDO;
use Childish\support\Container;
use PDOException;
use Childish\support\Tools;
use InvalidArgumentException;

/**
 * ConnectionFactory
 *
 * @author    Pu ShaoWei <[email protected]>
 * @date      2017/12/7
 * @package   Childish\container
 * @version   1.0
 */
class ConnectionFactory
{
    /**
     * The IoC container instance.
     *
     * @var \Childish\support\Container
     */
    protected $container;

    /**
     * ConnectionFactory constructor.
     *
     * @param \Childish\support\Container $container
     */
    public function __construct(Container $container)
    {
        $this->container = $container;
    }

    /**
     * Establish a PDO connection based on the configuration.
     *
     * @param  array  $config
     * @param  string $name
     * @return \childish\connection\Connection
     */
    public function make(array $config, $name = null)
    {
        $config = $this->parseConfig($config, $name);

        if (isset($config['read'])) {
            return $this->createReadWriteConnection($config);
        }

        return $this->createSingleConnection($config);
    }

    /**
     * Parse and prepare the database configuration.
     *
     * @param  array  $config
     * @param  string $name
     * @return array
     */
    protected function parseConfig(array $config, $name)
    {
        return Tools::add(Tools::add($config, 'prefix', ''), 'name', $name);
    }

    /**
     * Create a single database connection instance.
     *
     * @param  array $config
     * @return \Childish\connection\Connection
     */
    protected function createSingleConnection(array $config)
    {
        $pdo = $this->createPdoResolver($config);

        return $this->createConnection(
            $config['driver'], $pdo, $config['database'], $config['prefix'], $config
        );
    }

    /**
     * Create a single database connection instance.
     *
     * @param  array $config
     * @return \Childish\connection\Connection
     */
    protected function createReadWriteConnection(array $config)
    {
        $connection = $this->createSingleConnection($this->getWriteConfig($config));

        return $connection->setReadPdo($this->createReadPdo($config));
    }

    /**
     * Create a new PDO instance for reading.
     *
     * @param  array $config
     * @return \Closure
     */
    protected function createReadPdo(array $config)
    {
        return $this->createPdoResolver($this->getReadConfig($config));
    }

    /**
     * Get the read configuration for a read / write connection.
     *
     * @param  array $config
     * @return array
     */
    protected function getReadConfig(array $config)
    {
        return $this->mergeReadWriteConfig(
            $config, $this->getReadWriteConfig($config, 'read')
        );
    }

    /**
     * Get the read configuration for a read / write connection.
     *
     * @param  array $config
     * @return array
     */
    protected function getWriteConfig(array $config)
    {
        return $this->mergeReadWriteConfig(
            $config, $this->getReadWriteConfig($config, 'write')
        );
    }

    /**
     * Get a read / write level configuration.
     *
     * @param  array  $config
     * @param  string $type
     * @return array
     */
    protected function getReadWriteConfig(array $config, $type)
    {
        return isset($config[$type][0])
            ? Tools::random($config[$type])
            : $config[$type];
    }

    /**
     * Merge a configuration for a read / write connection.
     *
     * @param  array $config
     * @param  array $merge
     * @return array
     */
    protected function mergeReadWriteConfig(array $config, array $merge)
    {
        return Tools::except(array_merge($config, $merge), ['read', 'write']);
    }

    /**
     * Create a new Closure that resolves to a PDO instance.
     *
     * @param  array $config
     * @return \Closure
     */
    protected function createPdoResolver(array $config)
    {
        return array_key_exists('host', $config)
            ? $this->createPdoResolverWithHosts($config)
            : $this->createPdoResolverWithoutHosts($config);
    }

    /**
     * Create a new Closure that resolves to a PDO instance with a specific host or an array of hosts.
     *
     * @param  array $config
     * @return \Closure
     */
    protected function createPdoResolverWithHosts(array $config)
    {
        return function () use ($config) {
            foreach (Tools::shuffle($hosts = $this->parseHosts($config)) as $key => $host) {
                $config['host'] = $host;

                try {
                    return $this->createConnector($config)->connect($config);
                } catch (PDOException $e) {
                    throw $e;
                }
            }
        };
    }

    /**
     * Parse the hosts configuration item into an array.
     *
     * @param  array $config
     * @return array
     */
    protected function parseHosts(array $config)
    {
        $hosts = Tools::wrap($config['host']);

        if (empty($hosts)) {
            throw new InvalidArgumentException('Database hosts array is empty.');
        }

        return $hosts;
    }

    /**
     * Create a new Closure that resolves to a PDO instance where there is no configured host.
     *
     * @param  array $config
     * @return \Closure
     */
    protected function createPdoResolverWithoutHosts(array $config)
    {
        return function () use ($config) {
            return $this->createConnector($config)->connect($config);
        };
    }

    /**
     * Create a connector instance based on the configuration.
     *
     * @param  array $config
     * @return \Childish\connection\MySqlConnector
     * @throws \InvalidArgumentException
     */
    public function createConnector(array $config)
    {
        if (!isset($config['driver'])) {
            throw new InvalidArgumentException('A driver must be specified.');
        }
        if ($this->container->bound($key = "db.connector.{$config['driver']}")) {
            return $this->container->make($key);
        }
        if ($config['driver'] !== 'mysql') {
            throw new InvalidArgumentException("Unsupported driver [{$config['driver']}]");
        }
        return new MySqlConnector;
    }

    /**
     * Create a new connection instance.
     *
     * @param  string        $driver
     * @param  \PDO|\Closure $connection
     * @param  string        $database
     * @param  string        $prefix
     * @param  array         $config
     * @return \Childish\connection\Connection
     * @throws \InvalidArgumentException
     */
    protected function createConnection($driver, $connection, $database, $prefix = '', array $config = [])
    {
        if ($resolver = Connection::getResolver($driver)) {
            return $resolver($connection, $database, $prefix, $config);
        }
        if ($driver !== 'mysql') {
            throw new InvalidArgumentException("Unsupported driver [$driver]");
        }
        return new MySqlConnection($connection, $database, $prefix, $config);
    }
}


1			<?php
2			namespace Childish\connection;
3
4			use PDO;
5			use Childish\support\Container;
6			use PDOException;
7			use Childish\support\Tools;
8			use InvalidArgumentException;
9
10			/**
11			* ConnectionFactory
12			*
13			* @author Pu ShaoWei <[email protected]>
14			* @date 2017/12/7
15			* @package Childish\container
16			* @version 1.0
17			*/
18			class ConnectionFactory
19			{
20			/**
21			* The IoC container instance.
22			*
23			* @var \Childish\support\Container
24			*/
25			protected $container;
26
27			/**
28			* ConnectionFactory constructor.
29			*
30			* @param \Childish\support\Container $container
31			*/
32			public function __construct(Container $container)
33			{
34			$this->container = $container;
35			}
36
37			/**
38			* Establish a PDO connection based on the configuration.
39			*
40			* @param array $config
41			* @param string $name
42			* @return \childish\connection\Connection
43			*/
44			public function make(array $config, $name = null)
45			{
46			$config = $this->parseConfig($config, $name);
47
48			if (isset($config['read'])) {
49			return $this->createReadWriteConnection($config);
50			}
51
52			return $this->createSingleConnection($config);
53			}
54
55			/**
56			* Parse and prepare the database configuration.
57			*
58			* @param array $config
59			* @param string $name
60			* @return array
61			*/
62			protected function parseConfig(array $config, $name)
63			{
64			return Tools::add(Tools::add($config, 'prefix', ''), 'name', $name);
65			}
66
67			/**
68			* Create a single database connection instance.
69			*
70			* @param array $config
71			* @return \Childish\connection\Connection
72			*/
73			protected function createSingleConnection(array $config)
74			{
75			$pdo = $this->createPdoResolver($config);
76
77			return $this->createConnection(
78			$config['driver'], $pdo, $config['database'], $config['prefix'], $config
79			);
80			}
81
82			/**
83			* Create a single database connection instance.
84			*
85			* @param array $config
86			* @return \Childish\connection\Connection
87			*/
88			protected function createReadWriteConnection(array $config)
89			{
90			$connection = $this->createSingleConnection($this->getWriteConfig($config));
91
92			return $connection->setReadPdo($this->createReadPdo($config));
93			}
94
95			/**
96			* Create a new PDO instance for reading.
97			*
98			* @param array $config
99			* @return \Closure
100			*/
101			protected function createReadPdo(array $config)
102			{
103			return $this->createPdoResolver($this->getReadConfig($config));
104			}
105
106			/**
107			* Get the read configuration for a read / write connection.
108			*
109			* @param array $config
110			* @return array
111			*/
112			protected function getReadConfig(array $config)
113			{
114			return $this->mergeReadWriteConfig(
115			$config, $this->getReadWriteConfig($config, 'read')
116			);
117			}
118
119			/**
120			* Get the read configuration for a read / write connection.
121			*
122			* @param array $config
123			* @return array
124			*/
125			protected function getWriteConfig(array $config)
126			{
127			return $this->mergeReadWriteConfig(
128			$config, $this->getReadWriteConfig($config, 'write')
129			);
130			}
131
132			/**
133			* Get a read / write level configuration.
134			*
135			* @param array $config
136			* @param string $type
137			* @return array
138			*/
139			protected function getReadWriteConfig(array $config, $type)
140			{
141			return isset($config[$type][0])
142			? Tools::random($config[$type])
143			: $config[$type];
144			}
145
146			/**
147			* Merge a configuration for a read / write connection.
148			*
149			* @param array $config
150			* @param array $merge
151			* @return array
152			*/
153			protected function mergeReadWriteConfig(array $config, array $merge)
154			{
155			return Tools::except(array_merge($config, $merge), ['read', 'write']);
156			}
157
158			/**
159			* Create a new Closure that resolves to a PDO instance.
160			*
161			* @param array $config
162			* @return \Closure
163			*/
164			protected function createPdoResolver(array $config)
165			{
166			return array_key_exists('host', $config)
167			? $this->createPdoResolverWithHosts($config)
168			: $this->createPdoResolverWithoutHosts($config);
169			}
170
171			/**
172			* Create a new Closure that resolves to a PDO instance with a specific host or an array of hosts.
173			*
174			* @param array $config
175			* @return \Closure
176			*/
177			protected function createPdoResolverWithHosts(array $config)
178			{
179			return function () use ($config) {
180			foreach (Tools::shuffle($hosts = $this->parseHosts($config)) as $key => $host) {
181			$config['host'] = $host;
182
183			try {
184			return $this->createConnector($config)->connect($config);
185			} catch (PDOException $e) {
186			throw $e;
187			}
188			}
189			};
190			}
191
192			/**
193			* Parse the hosts configuration item into an array.
194			*
195			* @param array $config
196			* @return array
197			*/
198			protected function parseHosts(array $config)
199			{
200			$hosts = Tools::wrap($config['host']);
201
202			if (empty($hosts)) {
203			throw new InvalidArgumentException('Database hosts array is empty.');
204			}
205
206			return $hosts;
207			}
208
209			/**
210			* Create a new Closure that resolves to a PDO instance where there is no configured host.
211			*
212			* @param array $config
213			* @return \Closure
214			*/
215			protected function createPdoResolverWithoutHosts(array $config)
216			{
217			return function () use ($config) {
218			return $this->createConnector($config)->connect($config);
219			};
220			}
221
222			/**
223			* Create a connector instance based on the configuration.
224			*
225			* @param array $config
226			* @return \Childish\connection\MySqlConnector
227			* @throws \InvalidArgumentException
228			*/
229			public function createConnector(array $config)
230			{
231			if (!isset($config['driver'])) {
232			throw new InvalidArgumentException('A driver must be specified.');
233			}
234			if ($this->container->bound($key = "db.connector.{$config['driver']}")) {
235			return $this->container->make($key);
236			}
237			if ($config['driver'] !== 'mysql') {
238			throw new InvalidArgumentException("Unsupported driver [{$config['driver']}]");
239			}
240			return new MySqlConnector;
241			}
242
243			/**
244			* Create a new connection instance.
245			*
246			* @param string $driver
247			* @param \PDO\|\Closure $connection
248			* @param string $database
249			* @param string $prefix
250			* @param array $config
251			* @return \Childish\connection\Connection
252			* @throws \InvalidArgumentException
253			*/
254			protected function createConnection($driver, $connection, $database, $prefix = '', array $config = [])
255			{
256			if ($resolver = Connection::getResolver($driver)) {
257			return $resolver($connection, $database, $prefix, $config);
258			}
259			if ($driver !== 'mysql') {
260			throw new InvalidArgumentException("Unsupported driver [$driver]");
261			}
262			return new MySqlConnection($connection, $database, $prefix, $config);
263			}
264			}
265

PuShaoWei / SimpleEloquent

ConnectionFactory::createPdoResolver() A last analyzed 2017-12-14 05:20 UTC

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ConnectionFactory::createPdoResolver() A
last analyzed 2017-12-14 05:20 UTC