Zend Framework 2 : Handling Multiple Database

Pada skala aplikasi yang besar, kita sering menjumpai aplikasi yang menggunakan beberapa database sekaligus. Zend Framework 2 memfasilitasi kebutuhan ini dengan settingan yang super flexible. Cukup memanggil array konfigurasi, tak perlu pusing memikirkan sintax sql yang mungkin berbeda di teknologi database lain, cukup configure, and run!

Anggap saja, kita ingin membangun aplikasi dengan 2 database, yaitu Postgresql, dan Mysql, maka yang kita perlukan pertama adalah setting konfigurasi global di Zend Framework kita, seperti contoh berikut :

/**
 * Global Configuration Override
 *
 * You can use this file for overridding configuration values from modules, etc.  
 * You would place values in here that are agnostic to the environment and not 
 * sensitive to security. 
 *
 * @NOTE: In practice, this file will typically be INCLUDED in your source 
 * control, so do not include passwords or other sensitive information in this 
 * file.
 */

return array(
    // ...
    'db-pgsql' => array(
        'driver' => 'pdo_pgsql',
        'dbname' => 'zf2',
        'hostname' => 'localhost',
        'username' => 'developer',
        'password' => '123456'
    ),
    
    'db-mysql' => array(
        'driver' => 'pdo_mysql',
        'dbname' => 'zf2',
        'hostname' => 'localhost',
        'username' => 'root',
        'password' => ''
    ),
);

// file location : ZendSkeletonApplication\config\autoload\global.php

Kalau sudah, kita setting di module Application\Module.php :

//---------------------------------
    public function getServiceConfig()
    {
        return array(
            'factories' => array(
                
                'db-adapter-postgresql' =>  function($sm) {
                    $config = $sm->get('config');
                    $config = $config['db-pgsql'];
                    $dbAdapter = new DbAdapter($config);
                    return $dbAdapter;
                },
                
                'db-adapter-mysql' =>  function($sm) {
                    $config = $sm->get('config');
                    $config = $config['db-mysql'];
                    $dbAdapter = new DbAdapter($config);
                    return $dbAdapter;
                },
                
            ),
        );
    }
//---------------------------------

Nah, misalkan di module tertentu kita butuhkan, kita tinggal tambahkan di Module.php module tertentu tersebut :

//-------------------------
public function getServiceConfig()
    {
        return array(
            'factories' => array(
                
                'sample-table-pg' =>  function($sm) {
                    $dbAdapter = $sm->get('db-adapter-postgresql');
                    $table = new SampleTable($dbAdapter);
                    return $table;
                },
                
                'sample-table-my' =>  function($sm) {
                    $dbAdapter = $sm->get('db-adapter-mysql');
                    $table = new SampleTable($dbAdapter);
                    return $table;
                },
                
            ),
        );
    }
//----------------------

Untuk memanggil di Controller ? tinggal dipanggil seperti berikut :

//----------------------
    public function getSampleTable()
    {
        if (!$this->sampleTable) {
            $sm = $this->getServiceLocator();
            $this->sampleTable = $sm->get('sample-table-my'); 
            //change to "sample-table-pg" if need pgsql, just it 😉
        }
        return $this->sampleTable;
    }
//----------------------

Done !

Referensi :
http://akrabat.com/zend-framework-2-tutorial/
http://blog.evan.pro/sharing-a-database-connection-across-modules-in-zend-framework-2

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