Client::createNewConnection() - Code Metrics - Inspection of "Add querybuilder interface" - PlasmaPHP/core - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 45007f...b2e0bf )

by Charlotte

created 2019-02-09 20:15 UTC

Client::createNewConnection() A

↳ Parent: Client

Complexity

Conditions	1
Paths	1

Size

Total Lines	31
Code Lines	18

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	15
CRAP Score	1.0046

Importance

Changes

Metric	Value
cc	1
eloc	18
nc	1
nop	0
dl	0
loc	31
ccs	15
cts	18
cp	0.8333
crap	1.0046
rs	9.6666
c	0
b	0
f	0

<?php
/**
 * Plasma Core component
 * Copyright 2018-2019 PlasmaPHP, All Rights Reserved
 *
 * Website: https://github.com/PlasmaPHP
 * License: https://github.com/PlasmaPHP/core/blob/master/LICENSE
*/

namespace Plasma;

/**
 * The plasma client, responsible for pooling and connections.
 */
class Client implements ClientInterface {
    use \Evenement\EventEmitterTrait;
    
    /**
     * @var \Plasma\DriverFactoryInterface
     */
    protected $factory;
    
    /**
     * @var string
     */
    protected $uri;
    
    /**
     * @var array
     */
    protected $options = array(
        'connections.max' => 5,
        'connections.lazy' => false
    );
    
    /**
     * @var \React\Promise\PromiseInterface
     */
    protected $goingAway;
    
    /**
     * @var \CharlotteDunois\Collect\Set
     */
    protected $connections;
    
    /**
     * @var \CharlotteDunois\Collect\Set
     */
    protected $busyConnections;
    
    /**
     * Creates a client with the specified factory and options.
     *
     * Available options:
     * ```
     * array(
     *     'connections.max' => int, (the maximum amount of connections to open, defaults to 5)
     *     'connections.lazy' => bool, (whether the first connection should be established lazily (on first request), defaults to false)
     * )
     * ```
     *
     * @param \Plasma\DriverFactoryInterface  $factory
     * @param string                          $uri
     * @param array                           $options
     * @throws \InvalidArgumentException
     */
    function __construct(\Plasma\DriverFactoryInterface $factory, string $uri, array $options = array()) {
        $this->validateOptions($options);
        
        $this->factory = $factory;
        $this->uri = $uri;
        $this->options = \array_merge($this->options, $options);
        
        $this->connections = new \CharlotteDunois\Collect\Set();
        $this->busyConnections = new \CharlotteDunois\Collect\Set();
        
        if(!$this->options['connections.lazy']) {
            $connection = $this->createNewConnection();
            if($connection->getConnectionState() !== \Plasma\DriverInterface::CONNECTION_OK) {
                $this->busyConnections->add($connection);
            }
        }
    }
    
    /**
     * Creates a client with the specified factory and options.
     * @param \Plasma\DriverFactoryInterface  $factory
     * @param string                          $uri
     * @param array                           $options
     * @return \Plasma\ClientInterface
     * @throws \Throwable  The client implementation may throw any exception during this operation.
     * @see Client::__construct()
     */
    static function create(\Plasma\DriverFactoryInterface $factory, string $uri, array $options = array()): \Plasma\ClientInterface {
        return (new static($factory, $uri, $options));
    }
    
    /**
     * Get the amount of connections.
     * @return int
     */
    function getConnectionCount(): int {
        return ($this->connections->count() + $this->busyConnections->count());
    }
    
    /**
     * Checks a connection back in, if usable and not closing.
     * @param \Plasma\DriverInterface  $driver
     * @return void
     */
    function checkinConnection(\Plasma\DriverInterface $driver): void {
        if($driver->getConnectionState() !== \Plasma\DriverInterface::CONNECTION_UNUSABLE && !$this->goingAway) {
            $this->connections->add($driver);
            $this->busyConnections->delete($driver);
        }
    }
    
    /**
     * Begins a transaction. Resolves with a `Transaction` instance.
     *
     * Checks out a connection until the transaction gets committed or rolled back. If the transaction goes out of scope
     * and thus deallocated, the `Transaction` must check the connection back into the client.
     *
     * Some databases, including MySQL, automatically issue an implicit COMMIT when a database definition language (DDL)
     * statement such as DROP TABLE or CREATE TABLE is issued within a transaction.
     * The implicit COMMIT will prevent you from rolling back any other changes within the transaction boundary.
     * @param int  $isolation  See the `TransactionInterface` constants.
     * @return \React\Promise\PromiseInterface
     * @throws \Plasma\Exception
     * @see \Plasma\Transaction
     */
    function beginTransaction(int $isolation = \Plasma\TransactionInterface::ISOLATION_COMMITTED): \React\Promise\PromiseInterface {
        if($this->goingAway) {
            return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
        }
        
        $connection = $this->getOptimalConnection();
        
        return $connection->beginTransaction($this, $isolation)->then(null, function (\Throwable $error) use (&$connection) {
            $this->checkinConnection($connection);
            throw $error;
        });
    }
    
    /**
     * Executes a plain query. Resolves with a `QueryResult` instance.
     * @param string  $query
     * @return \React\Promise\PromiseInterface
     * @see \Plasma\QueryResultInterface
     */
    function query(string $query): \React\Promise\PromiseInterface {
        if($this->goingAway) {
            return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
        }
        
        $connection = $this->getOptimalConnection();
        
        return $connection->query($this, $query)->then(null, function (\Throwable $error) use (&$connection) {
            $this->checkinConnection($connection);
            throw $error;
        });
    }
    
    /**
     * Prepares a query. Resolves with a `StatementInterface` instance.
     * @param string  $query
     * @return \React\Promise\PromiseInterface
     * @see \Plasma\StatementInterface
     */
    function prepare(string $query): \React\Promise\PromiseInterface {
        if($this->goingAway) {
            return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
        }
        
        $connection = $this->getOptimalConnection();
        
        return $connection->prepare($this, $query)->then(null, function (\Throwable $error) use (&$connection) {
            $this->checkinConnection($connection);
            throw $error;
        });
    }
    
    /**
     * Prepares and executes a query. Resolves with a `QueryResultInterface` instance.
     * This is equivalent to prepare -> execute -> close.
     * If you need to execute a query multiple times, prepare the query manually for performance reasons.
     * @param string  $query
     * @param array   $params
     * @return \React\Promise\PromiseInterface
     * @throws \Plasma\Exception
     * @see \Plasma\StatementInterface
     */
    function execute(string $query, array $params = array()): \React\Promise\PromiseInterface {
        if($this->goingAway) {
            return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
        }
        
        $connection = $this->getOptimalConnection();
        
        return $connection->execute($this, $query, $params)->then(function ($value) use (&$connection) {
            $this->checkinConnection($connection);
            return $value;
        }, function (\Throwable $error) use (&$connection) {
            $this->checkinConnection($connection);
            throw $error;
        });
    }
    
    /**
     * Quotes the string for use in the query.
     * @param string  $str
     * @param int     $type  For types, see the driver interface constants.
     * @return string
     * @throws \LogicException    Thrown if the driver does not support quoting.
     * @throws \Plasma\Exception  Thrown if the client is closing all connections.
     */
    function quote(string $str, int $type = \Plasma\DriverInterface::QUOTE_TYPE_VALUE): string {
        if($this->goingAway) {
            throw new \Plasma\Exception('Client is closing all connections');
        }
        
        $connection = $this->getOptimalConnection();
        $quoted = $connection->quote($str, $type);
        
        $this->checkinConnection($connection);
        return $quoted;
    }
    
    /**
     * Closes all connections gracefully after processing all outstanding requests.
     * @return \React\Promise\PromiseInterface
     */
    function close(): \React\Promise\PromiseInterface {
        if($this->goingAway) {
            return $this->goingAway;
        }
        
        $deferred = new \React\Promise\Deferred();
        $this->goingAway = $deferred->promise();
        
        $closes = array();
        
        /** @var \Plasma\DriverInterface  $conn */
        foreach($this->connections->all() as $conn) {
            $closes[] = $conn->close();
            $this->connections->delete($conn);
        }
        
        /** @var \Plasma\DriverInterface  $conn */
        foreach($this->busyConnections->all() as $conn) {
            $closes[] = $conn->close();
            $this->busyConnections->delete($conn);
        }
        
        \React\Promise\all($closes)->then(array($deferred, 'resolve'), array($deferred, 'reject'));
        return $this->goingAway;
    }
    
    /**
     * Forcefully closes the connection, without waiting for any outstanding requests. This will reject all oustanding requests.
     * @return void
     */
    function quit(): void {
        if($this->goingAway) {
            return;
        }
        
        $this->goingAway = \React\Promise\resolve();
        
        /** @var \Plasma\DriverInterface  $conn */
        foreach($this->connections->all() as $conn) {
            $conn->quit();
            $this->connections->delete($conn);
        }
        
        /** @var \Plasma\DriverInterface  $conn */
        foreach($this->busyConnections->all() as $conn) {
            $conn->quit();
            $this->busyConnections->delete($conn);
        }
    }
    
    /**
     * Runs the given command.
     * @param \Plasma\CommandInterface  $command
     * @return mixed  Return depends on command and driver.
     * @throws \Plasma\Exception  Thrown if the client is closing all connections.
     */
    function runCommand(\Plasma\CommandInterface $command) {
        if($this->goingAway) {
            throw new \Plasma\Exception('Client is closing all connections');
        }
        
        $connection = $this->getOptimalConnection();
        return $connection->runCommand($this, $command);
    }
    
    /**
     * Runs the given querybuilder on an underlying driver instance.
     * The driver CAN throw an exception if the given querybuilder is not supported.
     * An example would be a SQL querybuilder and a Cassandra driver.
     * @param \Plasma\QuerybuilderInterface  $query
     * @return \React\Promise\PromiseInterface
     * @throws \Plasma\Exception
     */
    function runQuery(\Plasma\QuerybuilderInterface $query): \React\Promise\PromiseInterface {
        if($this->goingAway) {
            return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
        }
        
        $connection = $this->getOptimalConnection();
        return $connection->runQuery($this, $query);
    }
    
    /**
     * Get the optimal connection.
     * @return \Plasma\DriverInterface
     */
    protected function getOptimalConnection(): \Plasma\DriverInterface {
        if(\count($this->connections) === 0) {
            $connection = $this->createNewConnection();
            $this->busyConnections->add($connection);
            
            return $connection;
        }
        
        /** @var \Plasma\DriverInterface  $connection */
        $this->connections->rewind();
        $connection = $this->connections->current();
        
        $backlog = $connection->getBacklogLength();
        $state = $connection->getBusyState();
        
        /** @var \Plasma\DriverInterface  $conn */
        foreach($this->connections as $conn) {
            $cbacklog = $conn->getBacklogLength();
            $cstate = $conn->getBusyState();
            
            if($cbacklog === 0 && $conn->getConnectionState() === \Plasma\DriverInterface::CONNECTION_OK && $cstate == \Plasma\DriverInterface::STATE_IDLE) {
                $this->connections->delete($conn);
                $this->busyConnections->add($conn);
                
                return $conn;
            }
            
            if($backlog > $cbacklog || $state > $cstate) {
                $connection = $conn;
                $backlog = $cbacklog;
                $state = $cstate;
            }
        }
        
        if($this->getConnectionCount() < $this->options['connections.max']) {
            $connection = $this->createNewConnection();
        }
        
        $this->connections->delete($connection);
        $this->busyConnections->add($connection);
        
        return $connection;
    }
    
    /**
     * Create a new connection.
     * @return \Plasma\DriverInterface
     */
    protected function createNewConnection(): \Plasma\DriverInterface {
        $connection = $this->factory->createDriver();
        
        // We relay a driver's specific events forward, e.g. PostgreSQL notifications
        $connection->on('eventRelay', function (string $eventName, ...$args) use (&$connection) {
            $args[] = $connection;
            $this->emit($eventName, $args);
        });
        
        $connection->on('close', function () use (&$connection) {
            $this->connections->delete($connection);
            $this->busyConnections->delete($connection);
            
            $this->emit('close', array($connection));
        });
        
        $connection->on('error', function (\Throwable $error) use (&$connection) {
            $this->emit('error', array($error, $connection));
        });
        
        $connection->connect($this->uri)->then(function () use (&$connection) {
            $this->connections->add($connection);
            $this->busyConnections->delete($connection);
        }, function (\Throwable $error) use (&$connection) {
            $this->connections->delete($connection);
            $this->busyConnections->delete($connection);
            
            $this->emit('error', array($error, $connection));
        });
        
        return $connection;
    }
    
    /**
     * Validates the given options.
     * @param array  $options
     * @return void
     * @throws \InvalidArgumentException
     */
    protected function validateOptions(array $options) {
        $validator = \CharlotteDunois\Validation\Validator::make($options, array(
            'connections.max' => 'integer|min:1',
            'connections.lazy' => 'boolean'
        ));
        
        $validator->throw(\InvalidArgumentException::class);
    }
}


1		<?php
2		/**
3		* Plasma Core component
4		* Copyright 2018-2019 PlasmaPHP, All Rights Reserved
5		*
6		* Website: https://github.com/PlasmaPHP
7		* License: https://github.com/PlasmaPHP/core/blob/master/LICENSE
8		*/
9
10		namespace Plasma;
11
12		/**
13		* The plasma client, responsible for pooling and connections.
14		*/
15		class Client implements ClientInterface {
16		use \Evenement\EventEmitterTrait;
17
18		/**
19		* @var \Plasma\DriverFactoryInterface
20		*/
21		protected $factory;
22
23		/**
24		* @var string
25		*/
26		protected $uri;
27
28		/**
29		* @var array
30		*/
31		protected $options = array(
32		'connections.max' => 5,
33		'connections.lazy' => false
34		);
35
36		/**
37		* @var \React\Promise\PromiseInterface
38		*/
39		protected $goingAway;
40
41		/**
42		* @var \CharlotteDunois\Collect\Set
43		*/
44		protected $connections;
45
46		/**
47		* @var \CharlotteDunois\Collect\Set
48		*/
49		protected $busyConnections;
50
51		/**
52		* Creates a client with the specified factory and options.
53		*
54		* Available options:
55		* ```
56		* array(
57		* 'connections.max' => int, (the maximum amount of connections to open, defaults to 5)
58		* 'connections.lazy' => bool, (whether the first connection should be established lazily (on first request), defaults to false)
59		* )
60		* ```
61		*
62		* @param \Plasma\DriverFactoryInterface $factory
63		* @param string $uri
64		* @param array $options
65		* @throws \InvalidArgumentException
66		*/
67	52	function __construct(\Plasma\DriverFactoryInterface $factory, string $uri, array $options = array()) {
68	52	$this->validateOptions($options);
69
70	52	$this->factory = $factory;
71	52	$this->uri = $uri;
72	52	$this->options = \array_merge($this->options, $options);
73
74	52	$this->connections = new \CharlotteDunois\Collect\Set();
75	52	$this->busyConnections = new \CharlotteDunois\Collect\Set();
76
77	52	if(!$this->options['connections.lazy']) {
78	27	$connection = $this->createNewConnection();
79	27	if($connection->getConnectionState() !== \Plasma\DriverInterface::CONNECTION_OK) {
80		$this->busyConnections->add($connection);
81		}
82		}
83	52	}
84
85		/**
86		* Creates a client with the specified factory and options.
87		* @param \Plasma\DriverFactoryInterface $factory
88		* @param string $uri
89		* @param array $options
90		* @return \Plasma\ClientInterface
91		* @throws \Throwable The client implementation may throw any exception during this operation.
92		* @see Client::__construct()
93		*/
94	52	static function create(\Plasma\DriverFactoryInterface $factory, string $uri, array $options = array()): \Plasma\ClientInterface {
95	52	return (new static($factory, $uri, $options));
96		}
97
98		/**
99		* Get the amount of connections.
100		* @return int
101		*/
102	4	function getConnectionCount(): int {
103	4	return ($this->connections->count() + $this->busyConnections->count());
104		}
105
106		/**
107		* Checks a connection back in, if usable and not closing.
108		* @param \Plasma\DriverInterface $driver
109		* @return void
110		*/
111	16	function checkinConnection(\Plasma\DriverInterface $driver): void {
112	16	if($driver->getConnectionState() !== \Plasma\DriverInterface::CONNECTION_UNUSABLE && !$this->goingAway) {
113	8	$this->connections->add($driver);
114	8	$this->busyConnections->delete($driver);
115		}
116	16	}
117
118		/**
119		* Begins a transaction. Resolves with a `Transaction` instance.
120		*
121		* Checks out a connection until the transaction gets committed or rolled back. If the transaction goes out of scope
122		* and thus deallocated, the `Transaction` must check the connection back into the client.
123		*
124		* Some databases, including MySQL, automatically issue an implicit COMMIT when a database definition language (DDL)
125		* statement such as DROP TABLE or CREATE TABLE is issued within a transaction.
126		* The implicit COMMIT will prevent you from rolling back any other changes within the transaction boundary.
127		* @param int $isolation See the `TransactionInterface` constants.
128		* @return \React\Promise\PromiseInterface
129		* @throws \Plasma\Exception
130		* @see \Plasma\Transaction
131		*/
132	3	function beginTransaction(int $isolation = \Plasma\TransactionInterface::ISOLATION_COMMITTED): \React\Promise\PromiseInterface {
133	3	if($this->goingAway) {
134	1	return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
135		}
136
137	2	$connection = $this->getOptimalConnection();
138
139		return $connection->beginTransaction($this, $isolation)->then(null, function (\Throwable $error) use (&$connection) {
140	1	$this->checkinConnection($connection);
141	1	throw $error;
142	2	});
143		}
144
145		/**
146		* Executes a plain query. Resolves with a `QueryResult` instance.
147		* @param string $query
148		* @return \React\Promise\PromiseInterface
149		* @see \Plasma\QueryResultInterface
150		*/
151	5	function query(string $query): \React\Promise\PromiseInterface {
152	5	if($this->goingAway) {
153	1	return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
154		}
155
156	4	$connection = $this->getOptimalConnection();
157
158		return $connection->query($this, $query)->then(null, function (\Throwable $error) use (&$connection) {
159	1	$this->checkinConnection($connection);
160	1	throw $error;
161	4	});
162		}
163
164		/**
165		* Prepares a query. Resolves with a `StatementInterface` instance.
166		* @param string $query
167		* @return \React\Promise\PromiseInterface
168		* @see \Plasma\StatementInterface
169		*/
170	3	function prepare(string $query): \React\Promise\PromiseInterface {
171	3	if($this->goingAway) {
172	1	return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
173		}
174
175	2	$connection = $this->getOptimalConnection();
176
177		return $connection->prepare($this, $query)->then(null, function (\Throwable $error) use (&$connection) {
178	1	$this->checkinConnection($connection);
179	1	throw $error;
180	2	});
181		}
182
183		/**
184		* Prepares and executes a query. Resolves with a `QueryResultInterface` instance.
185		* This is equivalent to prepare -> execute -> close.
186		* If you need to execute a query multiple times, prepare the query manually for performance reasons.
187		* @param string $query
188		* @param array $params
189		* @return \React\Promise\PromiseInterface
190		* @throws \Plasma\Exception
191		* @see \Plasma\StatementInterface
192		*/
193	3	function execute(string $query, array $params = array()): \React\Promise\PromiseInterface {
194	3	if($this->goingAway) {
195	1	return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
196		}
197
198	2	$connection = $this->getOptimalConnection();
199
200		return $connection->execute($this, $query, $params)->then(function ($value) use (&$connection) {
201	1	$this->checkinConnection($connection);
202	1	return $value;
203		}, function (\Throwable $error) use (&$connection) {
204	1	$this->checkinConnection($connection);
205	1	throw $error;
206	2	});
207		}
208
209		/**
210		* Quotes the string for use in the query.
211		* @param string $str
212		* @param int $type For types, see the driver interface constants.
213		* @return string
214		* @throws \LogicException Thrown if the driver does not support quoting.
215		* @throws \Plasma\Exception Thrown if the client is closing all connections.
216		*/
217	2	function quote(string $str, int $type = \Plasma\DriverInterface::QUOTE_TYPE_VALUE): string {
218	2	if($this->goingAway) {
219	1	throw new \Plasma\Exception('Client is closing all connections');
220		}
221
222	1	$connection = $this->getOptimalConnection();
223	1	$quoted = $connection->quote($str, $type);
224
225	1	$this->checkinConnection($connection);
226	1	return $quoted;
227		}
228
229		/**
230		* Closes all connections gracefully after processing all outstanding requests.
231		* @return \React\Promise\PromiseInterface
232		*/
233	3	function close(): \React\Promise\PromiseInterface {
234	3	if($this->goingAway) {
235	1	return $this->goingAway;
236		}
237
238	2	$deferred = new \React\Promise\Deferred();
239	2	$this->goingAway = $deferred->promise();
240
241	2	$closes = array();
242
243		/** @var \Plasma\DriverInterface $conn */
244	2	foreach($this->connections->all() as $conn) {
245	1	$closes[] = $conn->close();
246	1	$this->connections->delete($conn);
247		}
248
249		/** @var \Plasma\DriverInterface $conn */
250	2	foreach($this->busyConnections->all() as $conn) {
251	1	$closes[] = $conn->close();
252	1	$this->busyConnections->delete($conn);
253		}
254
255	2	\React\Promise\all($closes)->then(array($deferred, 'resolve'), array($deferred, 'reject'));
256	2	return $this->goingAway;
257		}
258
259		/**
260		* Forcefully closes the connection, without waiting for any outstanding requests. This will reject all oustanding requests.
261		* @return void
262		*/
263	10	function quit(): void {
264	10	if($this->goingAway) {
265	1	return;
266		}
267
268	9	$this->goingAway = \React\Promise\resolve();
269
270		/** @var \Plasma\DriverInterface $conn */
271	9	foreach($this->connections->all() as $conn) {
272	8	$conn->quit();
273	8	$this->connections->delete($conn);
274		}
275
276		/** @var \Plasma\DriverInterface $conn */
277	9	foreach($this->busyConnections->all() as $conn) {
278	1	$conn->quit();
279	1	$this->busyConnections->delete($conn);
280		}
281	9	}
282
283		/**
284		* Runs the given command.
285		* @param \Plasma\CommandInterface $command
286		* @return mixed Return depends on command and driver.
287		* @throws \Plasma\Exception Thrown if the client is closing all connections.
288		*/
289	3	function runCommand(\Plasma\CommandInterface $command) {
290	3	if($this->goingAway) {
291	1	throw new \Plasma\Exception('Client is closing all connections');
292		}
293
294	2	$connection = $this->getOptimalConnection();
295	2	return $connection->runCommand($this, $command);
296		}
297
298		/**
299		* Runs the given querybuilder on an underlying driver instance.
300		* The driver CAN throw an exception if the given querybuilder is not supported.
301		* An example would be a SQL querybuilder and a Cassandra driver.
302		* @param \Plasma\QuerybuilderInterface $query
303		* @return \React\Promise\PromiseInterface
304		* @throws \Plasma\Exception
305		*/
306	2	function runQuery(\Plasma\QuerybuilderInterface $query): \React\Promise\PromiseInterface {
307	2	if($this->goingAway) {
308	1	return \React\Promise\reject((new \Plasma\Exception('Client is closing all connections')));
309		}
310
311	1	$connection = $this->getOptimalConnection();
312	1	return $connection->runQuery($this, $query);
313		}
314
315		/**
316		* Get the optimal connection.
317		* @return \Plasma\DriverInterface
318		*/
319	14	protected function getOptimalConnection(): \Plasma\DriverInterface {
320	14	if(\count($this->connections) === 0) {
321	1	$connection = $this->createNewConnection();
322	1	$this->busyConnections->add($connection);
323
324	1	return $connection;
325		}
326
327		/** @var \Plasma\DriverInterface $connection */
328	13	$this->connections->rewind();
329	13	$connection = $this->connections->current();
330
331	13	$backlog = $connection->getBacklogLength();
332	13	$state = $connection->getBusyState();
333
334		/** @var \Plasma\DriverInterface $conn */
335	13	foreach($this->connections as $conn) {
336	13	$cbacklog = $conn->getBacklogLength();
337	13	$cstate = $conn->getBusyState();
338
339	13	if($cbacklog === 0 && $conn->getConnectionState() === \Plasma\DriverInterface::CONNECTION_OK && $cstate == \Plasma\DriverInterface::STATE_IDLE) {
340	13	$this->connections->delete($conn);
341	13	$this->busyConnections->add($conn);
342
343	13	return $conn;
344		}
345
346		if($backlog > $cbacklog \|\| $state > $cstate) {
347		$connection = $conn;
348		$backlog = $cbacklog;
349		$state = $cstate;
350		}
351		}
352
353		if($this->getConnectionCount() < $this->options['connections.max']) {
354		$connection = $this->createNewConnection();
355		}
356
357		$this->connections->delete($connection);
358		$this->busyConnections->add($connection);
359
360		return $connection;
361		}
362
363		/**
364		* Create a new connection.
365		* @return \Plasma\DriverInterface
366		*/
367	28	protected function createNewConnection(): \Plasma\DriverInterface {
368	28	$connection = $this->factory->createDriver();
369
370		// We relay a driver's specific events forward, e.g. PostgreSQL notifications
371		$connection->on('eventRelay', function (string $eventName, ...$args) use (&$connection) {
372	1	$args[] = $connection;
373	1	$this->emit($eventName, $args);
374	28	});
375
376		$connection->on('close', function () use (&$connection) {
377	2	$this->connections->delete($connection);
378	2	$this->busyConnections->delete($connection);
379
380	2	$this->emit('close', array($connection));
381	28	});
382
383		$connection->on('error', function (\Throwable $error) use (&$connection) {
384	1	$this->emit('error', array($error, $connection));
385	28	});
386
387		$connection->connect($this->uri)->then(function () use (&$connection) {
388	28	$this->connections->add($connection);
389	28	$this->busyConnections->delete($connection);
390		}, function (\Throwable $error) use (&$connection) {
391		$this->connections->delete($connection);
392		$this->busyConnections->delete($connection);
393
394		$this->emit('error', array($error, $connection));
395	28	});
396
397	28	return $connection;
398		}
399
400		/**
401		* Validates the given options.
402		* @param array $options
403		* @return void
404		* @throws \InvalidArgumentException
405		*/
406	52	protected function validateOptions(array $options) {
407	52	$validator = \CharlotteDunois\Validation\Validator::make($options, array(
408	52	'connections.max' => 'integer\|min:1',
409		'connections.lazy' => 'boolean'
410		));
411
412	52	$validator->throw(\InvalidArgumentException::class);
413	52	}
414		}
415

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Client::createNewConnection() A

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