Simply handles multiple connections across multiple user adapters.
- Connects only when necessary and only once during runtime
- No dependencies - write any adapter for any extension or just proxy the interface itself
- Different instances for one adapter (e.g. several different memcached instances)
- Supports closure approach
- Easy to configure
- PHP 5.4+
use xconn\Connector;/* Touch connection and pass closure. You may pass data scope inside through 'use' */
$foo = Connector::touch('memcached', function($m) {
return $m->get('bar');
}));
/* More logic inside */
$users = Connector::touch('production_database', function ($db) {
$list = [];
$result = $db->query("SELECT user_name FROM users");
while ($data = $db->fetch($result)) {
$list[] = $data['user_name'];
}
return $list;
});/* Simply take an instance */
$db = Connector::take('local_database');
/* And use it */
$result = $db->query('SELECT foo FROM bar');/* Proxy adapted connection */
$m = Connector::proxy('memcached');
/* Use original interface. ! Adapters' aliases will not work */
print_r($m->getVersion());Each adapter should extend common Adapter class and define abstract methods. The $config will be passed from the configuration file. Use $this->connection as instance inside your adapter methods.
protected $connection = null;
abstract protected function openConnection($config);
abstract protected function closeConnection();<?php namespace xconn\adapters;
final class Memcached extends \xconn\Adapter {
/* memcached compare-and-save token */
public $cas_token;
/* @return Instance|bool */
protected function openConnection($config) {
$instance = new \Memcached();
if (!$instance->addServer($config['host'], $config['port'])) {
return false;
}
return $instance;
}
/* Correctly close the connection */
protected function closeConnection() {
if (!$this->connection) {
return false;
}
$this->connection->quit();
}
/* Put your aliases here */
public function get($key) {
return $this->connection->get($key, null, $this->cas_token);
}
/* .... */
All variables will be passed as $config to Adapter\openConnection;
[production_database]
adapter = MySQL
host = null
user = root
port = 0
pass = pass
name = dbname
socket = /tmp/mysql.sock
[memcached]
adapter = memcached
prefix = myprefix
host = localhost
port = 11211
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