redis's Introduction

component used to access Redis

install

$ curl -s http://getcomposer.org/installer | php
$ php composer.phar install

feature

Fire event on each redis command when an eventDispatcher is setted.

$this->setEventDispatcher($eventDispatcher, $eventClass);

cache mode

M6Web\Component\Redis\Cache

Send redis command to different server with a simple consistent hashing algorithm. Ignore server not responding.

When a redis server fall, keys are dispatched on the other servers.

$server_config = array(
        'php50' => array (
            'ip' => '127.0.0.1',
            'port' => 6379,
            ),
'phpraoul' => array (  // bad server
    'ip' => '1.2.3.4',
    'port' => 6379,
    ),
'php51' => array (
    'ip' => '127.0.0.1',
    'port' => 6379,
    )
);
$redis = new redis\Cache(array(
    'timeout' => self::TIMEOUT,
    'server_config' => $server_config,
    'namespace' => self::SPACENAME
    ));
$redis->set('foo', 'bar');
$foo = $redis->get('foo');
if ($redis->exists('raoul')) die('ho mon dieu il existe vraiment !');
$redis->multi()->set('foo', 'bar2');
$redis->watch('raoul');
$raoul = UnClasse::WorkHard();
$redis->set('raoul', $raoul); // wont do anything if the raoul key is modified
$redis->exec(); // execute all sets since the multi instructions
$redis->incr('compteur');
$redis-decr('compteur');

Check unit test for more informations.

db mode

M6Web\Component\Redis\DB

Access to the predis object simply calling the predis methods.

Multi mode

M6Web\Component\Redis\Multi

Send redis command to multiple server or send command to a random redis server.

$server_config = array(
        'php50' => array (
            'ip' => 'x.x.x.1',
            'port' => 6379,
            ),
        'php51' => array (
            'ip' => 'x.x.x.2',
            'port' => 6379,
            ),
);
$redis = new redis\Multi(['timeout' => 0.1,
                         'server_config' => $server_config]);

try{
    $redis->onAllServer($strict = true)->set('foo', 'bar');
} catch(redis\Exception $e) {
    die('error occured on setting foo bar on a server');
}
// strict mode disabled, don't care about server availability
$redis->onAllServer($strict = false)->set('foo', 'bar');

// read value on a random server
try {
    $value = $redis->onOneRandomServer()->get('foo');
} catch(redis\Exception $e) {
    die('no server available');
}

timeouts

A connection timeout is availaible through the timeout parameter. A read write timeout can be specified with the read_write_timeout parameter (by default, equal to the connection timeout).

$redis = new redis\Cache(array(
    'timeout' => 0.5,
    'read_write_timeout' => 0.2,
    'server_config' => $server_config,
    'namespace' => self::SPACENAME
    ),
);