/**
* Returns the wrapped Redis client instance.
*
* This method is called from AbstractRedisWrapper, who uses it to call the desired method directly
* on the wrapped redis, rather than using call_user_func().
* The command and key are passed into the method to allow for some logic within the implementations
* of this method.
*
* @param string $command the current command
* @param string|null $key the current key if available, null otherwise. Commands that operate on
* multiple keys will pass their keys as a comma separated string.
* @return Redis
*/
protected function getWrappedRedis($command, $key = null)
{
// we are doing a linear search here with in_array(), if this proves too slow, we could change
// over to an associative array which has the commands as key and the connections as values.
// this method would then shorten too: return $this->clients[self::$commands[$command]];
// see whether it's a read command or whether we are in multi mode
// due to complications with mixed read and write commands in multi mode, we decided to use only
// the write connection when its active
if (!$this->inMultiMode && $this->commandHelper->isReadCommand($command)) {
return $this->getClientByKey('r');
}
// everything that's not a read command is a write command. this is also our fallback, so we don't
// do an additional search over $this->commandHelper
return $this->getClientByKey('w');
}
public function testCommands()
{
$ch = new CommandHelper();
$this->assertTrue($ch->isReadCommand('get'));
$this->assertTrue($ch->isReadCommand('GET'));
$this->assertTrue($ch->isReadCommand('smembers'));
$this->assertTrue($ch->isReadCommand('sMembers'));
$this->assertFalse($ch->isWriteCommand('get'));
$this->assertFalse($ch->isWriteCommand('sMembers'));
$this->assertTrue($ch->isWriteCommand('set'));
$this->assertTrue($ch->isWriteCommand('SET'));
$this->assertTrue($ch->isWriteCommand('lpush'));
$this->assertTrue($ch->isWriteCommand('lPush'));
$this->assertFalse($ch->isReadCommand('set'));
$this->assertFalse($ch->isReadCommand('lPush'));
}
