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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.
*/
namespace Predis\Transaction;
/**
* Utility class used to track the state of a MULTI / EXEC transaction.
*
* @author Daniele Alessandri <suppakilla@gmail.com>
*/
class MultiExecState
{
const INITIALIZED = 1; // 0b00001
const INSIDEBLOCK = 2; // 0b00010
const DISCARDED = 4; // 0b00100
const CAS = 8; // 0b01000
const WATCH = 16; // 0b10000
private $flags;
/**
*
*/
public function __construct()
{
$this->flags = 0;
}
/**
* Sets the internal state flags.
*
* @param int $flags Set of flags
*/
public function set($flags)
{
$this->flags = $flags;
}
/**
* Gets the internal state flags.
*
* @return int
*/
public function get()
{
return $this->flags;
}
/**
* Sets one or more flags.
*
* @param int $flags Set of flags
*/
public function flag($flags)
{
$this->flags |= $flags;
}
/**
* Resets one or more flags.
*
* @param int $flags Set of flags
*/
public function unflag($flags)
{
$this->flags &= ~$flags;
}
/**
* Returns if the specified flag or set of flags is set.
*
* @param int $flags Flag
*
* @return bool
*/
public function check($flags)
{
return ($this->flags & $flags) === $flags;
}
/**
* Resets the state of a transaction.
*/
public function reset()
{
$this->flags = 0;
}
/**
* Returns the state of the RESET flag.
*
* @return bool
*/
public function isReset()
{
return $this->flags === 0;
}
/**
* Returns the state of the INITIALIZED flag.
*
* @return bool
*/
public function isInitialized()
{
return $this->check(self::INITIALIZED);
}
/**
* Returns the state of the INSIDEBLOCK flag.
*
* @return bool
*/
public function isExecuting()
{
return $this->check(self::INSIDEBLOCK);
}
/**
* Returns the state of the CAS flag.
*
* @return bool
*/
public function isCAS()
{
return $this->check(self::CAS);
}
/**
* Returns if WATCH is allowed in the current state.
*
* @return bool
*/
public function isWatchAllowed()
{
return $this->check(self::INITIALIZED) && !$this->check(self::CAS);
}
/**
* Returns the state of the WATCH flag.
*
* @return bool
*/
public function isWatching()
{
return $this->check(self::WATCH);
}
/**
* Returns the state of the DISCARDED flag.
*
* @return bool
*/
public function isDiscarded()
{
return $this->check(self::DISCARDED);
}
}