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https://github.com/predis/predis.git
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Daniele Alessandri
2d0b30dac5
Now Predis\Command\ScriptedCommand uses EVALSHA instead of EVAL internally so that performances should be better since the client do not resend the Lua script body on each call. Plain EVALSHA commands are not affected and will return or throw the error.
84 lines
2.1 KiB
PHP
84 lines
2.1 KiB
PHP
<?php
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/*
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* This file is part of the Predis package.
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*
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* (c) Daniele Alessandri <suppakilla@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Predis\Command;
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/**
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* Base class used to implement an higher level abstraction for "virtual"
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* commands based on EVAL.
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*
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* @link http://redis.io/commands/eval
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* @author Daniele Alessandri <suppakilla@gmail.com>
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*/
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abstract class ScriptedCommand extends ServerEvalSHA
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{
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/**
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* Gets the body of a Lua script.
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*
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* @return string
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*/
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public abstract function getScript();
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/**
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* Specifies the number of arguments that should be considered as keys.
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*
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* The default behaviour for the base class is to return FALSE to indicate that
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* all the elements of the arguments array should be considered as keys, but
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* subclasses can enforce a static number of keys.
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*
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* @todo How about returning 1 by default to make scripted commands act like
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* variadic ones where the first argument is the key (KEYS[1]) and the
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* rest are values (ARGV)?
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*
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* @return int|Boolean
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*/
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protected function getKeysCount()
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{
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return false;
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}
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/**
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* Returns the elements from the arguments that are identified as keys.
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*
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* @return array
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*/
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public function getKeys()
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{
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return array_slice($this->getArguments(), 2, $this->getKeysCount());
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}
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/**
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* {@inheritdoc}
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*/
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protected function filterArguments(Array $arguments)
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{
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if (false !== $numkeys = $this->getKeysCount()) {
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$numkeys = $numkeys >= 0 ? $numkeys : count($arguments) + $numkeys;
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}
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else {
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$numkeys = count($arguments);
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}
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return array_merge(array(sha1($this->getScript()), $numkeys), $arguments);
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}
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/**
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* @return array
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*/
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public function getEvalArguments()
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{
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$arguments = $this->getArguments();
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$arguments[0] = $this->getScript();
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return $arguments;
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}
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}
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