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<?php
/*
* This file is part of the Predis package.
*
* (c) Daniele Alessandri <suppakilla@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
require 'SharedConfigurations.php';
// Predis allows to set Lua scripts as read-only operations in the context of
// replication. This works for both EVAL and EVALSHA and also for the client-side
// abstraction built upon them (Predis\Command\ScriptedCommand). This example
// shows a slightly more complex configuration that injects a new scripted command
// in the server profile used by the new client instance and marks it marks it as
// a read-only operation for replication so that it will be executed on slaves.
use Predis\Command\ScriptedCommand;
use Predis\Connection\MasterSlaveReplication;
use Predis\Replication\ReplicationStrategy;
// ------------------------------------------------------------------------- //
// Define a new scripted command that returns all the fields
// of a variable number of hashes with a single roundtrip.
class HashMultipleGetAll extends ScriptedCommand
{
const BODY = <<<EOS
local hashes = {}
for _, key in pairs(KEYS) do
table.insert(hashes, key)
table.insert(hashes, redis.call('hgetall', key))
end
return hashes
EOS;
public function getScript()
{
return self::BODY;
}
}
// ------------------------------------------------------------------------- //
$parameters = array(
'tcp://127.0.0.1:6379/?alias=master',
'tcp://127.0.0.1:6380/?alias=slave',
);
$options = array(
'profile' => function ($options, $option) {
$profile = $options->getDefault($option);
$profile->defineCommand('hmgetall', 'HashMultipleGetAll');
return $profile;
},
'replication' => function ($options) {
$strategy = new ReplicationStrategy();
$strategy->setScriptReadOnly(HashMultipleGetAll::BODY);
$replication = new MasterSlaveReplication($strategy);
return $replication;
},
);
// ------------------------------------------------------------------------- //
$client = new Predis\Client($parameters, $options);
// Execute the following commands on the master server using redis-cli:
// $ ./redis-cli HMSET metavars foo bar hoge piyo
// $ ./redis-cli HMSET servers master host1 slave host2
$hashes = $client->hmgetall('metavars', 'servers');
$replication = $client->getConnection();
$stillOnSlave = $replication->getCurrent() === $replication->getConnectionById('slave');
echo "Is still on slave? ", $stillOnSlave ? 'YES' : 'NO', "!\n";
var_export($hashes);
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