[李景山php]每天laravel-20160921|Redis Database.php

<?phpnamespace Illuminate\Redis;use Closure;use Predis\Client;use Illuminate\Support\Arr;use Illuminate\Contracts\Redis\Database as DatabaseContract;// this is Redis namespace , father is Database Contractclass Database implements DatabaseContract{// class Database implements Database Contract    /**     * The host address of the database.     *     * @var array     */    protected $clients;// The host address of the database.    // host not hot , ok    // host address is like 127.0.0.1    /**     * Create a new Redis connection instance.     *     * @param  array  $servers     * @return void     */    public function __construct(array $servers = [])    {        $cluster = Arr::pull($servers, 'cluster');// cluster is lots of servers        $options = (array) Arr::pull($servers, 'options');// pull servers        // get options        if ($cluster) {// if it is a cluster ,use first way to make it            $this->clients = $this->createAggregateClient($servers, $options);        } else {// other way            $this->clients = $this->createSingleClients($servers, $options);        }    }// Create a new Redis connection instance    /**     * Create a new aggregate client supporting sharding.     *     * @param  array  $servers     * @param  array  $options     * @return array     */    protected function createAggregateClient(array $servers, array $options = [])    {        return ['default' => new Client(array_values($servers), $options)];        // set the with server and options    }//Create a new aggregate client supporting sharding    /**     * Create an array of single connection clients.     *     * @param  array  $servers     * @param  array  $options     * @return array     */    protected function createSingleClients(array $servers, array $options = [])    {        $clients = [];// create Single Clients make clients        foreach ($servers as $key => $server) {// a Single Client            $clients[$key] = new Client($server, $options);        }        return $clients;    }// make a single Clients    /**     * Get a specific Redis connection instance.     *     * @param  string  $name     * @return \Predis\ClientInterface|null     */    public function connection($name = 'default')    {        return Arr::get($this->clients, $name ?: 'default');    }//Get a specific Redis connection instance.    // Get a instance about you  self want    /**     * Run a command against the Redis database.     *     * @param  string  $method     * @param  array   $parameters     * @return mixed     */    public function command($method, array $parameters = [])    {        return call_user_func_array([$this->clients['default'], $method], $parameters);    }// Run a command against the Redis database    // use this method call_user_func_array    /**     * Subscribe to a set of given channels for messages.     *     * @param  array|string  $channels     * @param  \Closure  $callback     * @param  string  $connection     * @param  string  $method     * @return void     */    public function subscribe($channels, Closure $callback, $connection = null, $method = 'subscribe')    {        $loop = $this->connection($connection)->pubSubLoop();// loop        call_user_func_array([$loop, $method], (array) $channels);// call user func array        foreach ($loop as $message) {            if ($message->kind === 'message' || $message->kind === 'pmessage') {                call_user_func($callback, $message->payload, $message->channel);// call_user_func            }        }// loop like message        unset($loop);    }//Subscribe    /**     * Subscribe to a set of given channels with wildcards.     *     * @param  array|string  $channels     * @param  \Closure  $callback     * @param  string  $connection     * @return void     */    public function psubscribe($channels, Closure $callback, $connection = null)    {        return $this->subscribe($channels, $callback, $connection, __FUNCTION__);    }// Subscribe to a set of given channels with wildcards    /**     * Dynamically make a Redis command.     *     * @param  string  $method     * @param  array   $parameters     * @return mixed     */    public function __call($method, $parameters)    {        return $this->command($method, $parameters);    }// very good method, }