Helper class to manage Redis connections. More...

Collaboration diagram for RedisConnectionPool:

Public Member Functions
	__destruct ()
	Make sure connections are closed for sanity. More...

	freeConnection ( $server, Redis $conn)
	Mark a connection to a server as free to return to the pool. More...

	getConnection ( $server)
	Get a connection to a redis server. More...

	handleError (RedisConnRef $cref, RedisException $e)
	The redis extension throws an exception in response to various read, write and protocol errors. More...

	handleException ( $server, RedisConnRef $cref, RedisException $e)
	The redis extension throws an exception in response to various read, write and protocol errors. More...

	reauthenticateConnection ( $server, Redis $conn)
	Re-send an AUTH request to the redis server (useful after disconnects). More...

Static Public Member Functions
static	singleton (array $options)

Public Attributes
const	SERVER_DOWN_TTL = 30
	integer; seconds to cache servers as "down". More...

Protected Member Functions
	__construct (array $options)

	closeExcessIdleConections ()
	Close any extra idle connections if there are more than the limit. More...

Static Protected Member Functions
static	applyDefaultConfig (array $options)

Protected Attributes
array	$connections = array()
	(server name => ((connection info array),...) * More...

array	$downServers = array()
	(server name => UNIX timestamp) * More...

int	$idlePoolSize = 0
	Current idle pool size *. More...

Pool settings.
Settings there are shared for any connection made in this pool. See the singleton() method documentation for more details.
string	$connectTimeout
	Connection timeout in seconds *. More...

string	$password
	Plaintext auth password *. More...

bool	$persistent
	Whether connections persist *. More...

int	$serializer
	Serializer to use (Redis::SERIALIZER_) . More...

Static Protected Attributes
static	$instances = array()

Detailed Description

Helper class to manage Redis connections.

This can be used to get handle wrappers that free the handle when the wrapper leaves scope. The maximum number of free handles (connections) is configurable. This provides an easy way to cache connection handles that may also have state, such as a handle does between multi() and exec(), and without hoarding connections. The wrappers use PHP magic methods so that calling functions on them calls the function of the actual Redis object handle.

Since: 1.21

Definition at line 38 of file RedisConnectionPool.php.

Constructor & Destructor Documentation

◆ __construct()

RedisConnectionPool::__construct ( array $options )

protected

Parameters

array $options

Exceptions

MWException

Definition at line 66 of file RedisConnectionPool.php.

References $options.

◆ __destruct()

RedisConnectionPool::__destruct ( )

Make sure connections are closed for sanity.

Definition at line 331 of file RedisConnectionPool.php.

References as.

Member Function Documentation

◆ applyDefaultConfig()

static RedisConnectionPool::applyDefaultConfig ( array $options )

staticprotected

Parameters

array $options

Returns: array

Definition at line 89 of file RedisConnectionPool.php.

References $options.

Referenced by singleton().

◆ closeExcessIdleConections()

RedisConnectionPool::closeExcessIdleConections ( )

protected

Close any extra idle connections if there are more than the limit.

Definition at line 247 of file RedisConnectionPool.php.

References as.

Referenced by freeConnection().

◆ freeConnection()

RedisConnectionPool::freeConnection	(		$server,
		Redis	$conn
	)

Mark a connection to a server as free to return to the pool.

Parameters

string	$server
Redis	$conn

Returns: bool

Definition at line 228 of file RedisConnectionPool.php.

References $idlePoolSize, as, and closeExcessIdleConections().

◆ getConnection()

RedisConnectionPool::getConnection ( $server )

Get a connection to a redis server.

Based on code in RedisBagOStuff.php.

Parameters

string $server A hostname/port combination or the absolute path of a UNIX socket. If a hostname is specified but no port, port 6379 will be used.

Returns: RedisConnRef|bool Returns false on failure

Exceptions

MWException

Definition at line 137 of file RedisConnectionPool.php.

References $e, $idlePoolSize, array(), as, list, SERVER_DOWN_TTL, IP\splitHostAndPort(), wfDebug(), and wfDebugLog().

◆ handleError()

RedisConnectionPool::handleError	(	RedisConnRef	$cref,
		RedisException	$e
	)

The redis extension throws an exception in response to various read, write and protocol errors.

Sometimes it also closes the connection, sometimes not. The safest response for us is to explicitly destroy the connection object and let it be reopened during the next request.

Parameters

RedisConnRef	$cref
RedisException	$e

Definition at line 288 of file RedisConnectionPool.php.

References $e, as, RedisConnRef\getServer(), RedisConnRef\isConnIdentical(), and wfDebugLog().

Referenced by handleException().

◆ handleException()

RedisConnectionPool::handleException	(		$server,
		RedisConnRef	$cref,
		RedisException	$e
	)

The redis extension throws an exception in response to various read, write and protocol errors.

Sometimes it also closes the connection, sometimes not. The safest response for us is to explicitly destroy the connection object and let it be reopened during the next request.

Parameters

string	$server
RedisConnRef	$cref
RedisException	$e

Deprecated:: 1.23

Definition at line 275 of file RedisConnectionPool.php.

References $e, and handleError().

◆ reauthenticateConnection()

RedisConnectionPool::reauthenticateConnection	(		$server,
		Redis	$conn
	)

Re-send an AUTH request to the redis server (useful after disconnects).

This works around an upstream bug in phpredis. phpredis hides disconnects by transparently reconnecting, but it neglects to re-authenticate the new connection. To the user of the phpredis client API this manifests as a seemingly random tendency of connections to lose their authentication status.

This method is for internal use only.

See also: https://github.com/nicolasff/phpredis/issues/403

Parameters

string	$server
Redis	$conn

Returns: bool Success

Definition at line 316 of file RedisConnectionPool.php.

References wfDebugLog().

◆ singleton()

static RedisConnectionPool::singleton ( array $options )

static

Parameters

array

$options

$options include:

connectTimeout : The timeout for new connections, in seconds. Optional, default is 1 second.
persistent : Set this to true to allow connections to persist across multiple web requests. False by default.
password : The authentication password, will be sent to Redis in clear text. Optional, if it is unspecified, no AUTH command will be sent.
serializer : Set to "php", "igbinary", or "none". Default is "php".

Returns: RedisConnectionPool

Examples: /src/includes/rcfeed/RedisPubSubFeedEngine.php.

Definition at line 115 of file RedisConnectionPool.php.

References $options, applyDefaultConfig(), and wfDebug().

Referenced by JobQueueAggregatorRedis\__construct(), RedisBagOStuff\__construct(), RedisLockManager\__construct(), PoolCounterRedis\__construct(), JobQueueRedis\__construct(), and RedisPubSubFeedEngine\send().

Member Data Documentation

◆ $connections

array RedisConnectionPool::$connections = array()

protected

(server name => ((connection info array),...) *

Definition at line 53 of file RedisConnectionPool.php.

◆ $connectTimeout

string RedisConnectionPool::$connectTimeout

protected

Connection timeout in seconds *.

Definition at line 45 of file RedisConnectionPool.php.

◆ $downServers

array RedisConnectionPool::$downServers = array()

protected

(server name => UNIX timestamp) *

Definition at line 54 of file RedisConnectionPool.php.

◆ $idlePoolSize

int RedisConnectionPool::$idlePoolSize = 0

protected

Current idle pool size *.

Definition at line 51 of file RedisConnectionPool.php.

Referenced by freeConnection(), and getConnection().

◆ $instances

RedisConnectionPool::$instances = array()

staticprotected

Definition at line 57 of file RedisConnectionPool.php.

◆ $password

string RedisConnectionPool::$password

protected

Plaintext auth password *.

Definition at line 46 of file RedisConnectionPool.php.

◆ $persistent

bool RedisConnectionPool::$persistent

protected

Whether connections persist *.

Definition at line 47 of file RedisConnectionPool.php.

◆ $serializer

int RedisConnectionPool::$serializer

protected

Serializer to use (Redis::SERIALIZER_*) *.

Definition at line 48 of file RedisConnectionPool.php.

◆ SERVER_DOWN_TTL

const RedisConnectionPool::SERVER_DOWN_TTL = 30

integer; seconds to cache servers as "down".

Definition at line 60 of file RedisConnectionPool.php.

Referenced by getConnection().

The documentation for this class was generated from the following file:

includes/clientpool/RedisConnectionPool.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

◆ __destruct()

Member Function Documentation

◆ applyDefaultConfig()

◆ closeExcessIdleConections()

◆ freeConnection()

◆ getConnection()

◆ handleError()

◆ handleException()

◆ reauthenticateConnection()

◆ singleton()

Member Data Documentation

◆ $connections

◆ $connectTimeout

◆ $downServers

◆ $idlePoolSize

◆ $instances

◆ $password

◆ $persistent

◆ $serializer

◆ SERVER_DOWN_TTL