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Commit cb871a25 authored by lucha's avatar lucha
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making r2db into a Composer package

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.gitignore 0 → 100644
+ 2
− 0
View file @ cb871a25
/vendor/
/hyperdb/
composer.json 0 → 100644
+ 28
− 0
View file @ cb871a25
{
"name": "lucha/r2db",
"description": "r2db wordpress database",
"type": "libray",
"license": "MIT",
"authors": [
{
"name": "lucha",
"email": "lucha@paranoici.org"
}
],
"repositories": [
{
"type": "composer",
"url" : "https://wpackagist.org"
}
],
"require": {
"flexihash/flexihash": "^2.0",
"wpackagist-plugin/hyperdb": "^1.6",
"composer/installers": "^1.9"
},
"extra": {
"installer-paths": {
"hyperdb": ["wpackagist-plugin/hyperdb"]
}
}
}
composer.lock 0 → 100644
+ 218
− 0
View file @ cb871a25
{
"_readme": [
"This file locks the dependencies of your project to a known state",
"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
"This file is @generated automatically"
],
"content-hash": "969ecb964c3720238fbd1b5024615354",
"packages": [
{
"name": "composer/installers",
"version": "v1.9.0",
"source": {
"type": "git",
"url": "https://github.com/composer/installers.git",
"reference": "b93bcf0fa1fccb0b7d176b0967d969691cd74cca"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/composer/installers/zipball/b93bcf0fa1fccb0b7d176b0967d969691cd74cca",
"reference": "b93bcf0fa1fccb0b7d176b0967d969691cd74cca",
"shasum": ""
},
"require": {
"composer-plugin-api": "^1.0 || ^2.0"
},
"replace": {
"roundcube/plugin-installer": "*",
"shama/baton": "*"
},
"require-dev": {
"composer/composer": "1.6.* || 2.0.*@dev",
"composer/semver": "1.0.* || 2.0.*@dev",
"phpunit/phpunit": "^4.8.36",
"sebastian/comparator": "^1.2.4",
"symfony/process": "^2.3"
},
"type": "composer-plugin",
"extra": {
"class": "Composer\\Installers\\Plugin",
"branch-alias": {
"dev-master": "1.0-dev"
}
},
"autoload": {
"psr-4": {
"Composer\\Installers\\": "src/Composer/Installers"
}
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Kyle Robinson Young",
"email": "kyle@dontkry.com",
"homepage": "https://github.com/shama"
}
],
"description": "A multi-framework Composer library installer",
"homepage": "https://composer.github.io/installers/",
"keywords": [
"Craft",
"Dolibarr",
"Eliasis",
"Hurad",
"ImageCMS",
"Kanboard",
"Lan Management System",
"MODX Evo",
"MantisBT",
"Mautic",
"Maya",
"OXID",
"Plentymarkets",
"Porto",
"RadPHP",
"SMF",
"Thelia",
"Whmcs",
"WolfCMS",
"agl",
"aimeos",
"annotatecms",
"attogram",
"bitrix",
"cakephp",
"chef",
"cockpit",
"codeigniter",
"concrete5",
"croogo",
"dokuwiki",
"drupal",
"eZ Platform",
"elgg",
"expressionengine",
"fuelphp",
"grav",
"installer",
"itop",
"joomla",
"known",
"kohana",
"laravel",
"lavalite",
"lithium",
"magento",
"majima",
"mako",
"mediawiki",
"modulework",
"modx",
"moodle",
"osclass",
"phpbb",
"piwik",
"ppi",
"puppet",
"pxcms",
"reindex",
"roundcube",
"shopware",
"silverstripe",
"sydes",
"sylius",
"symfony",
"typo3",
"wordpress",
"yawik",
"zend",
"zikula"
],
"time": "2020-04-07T06:57:05+00:00"
},
{
"name": "flexihash/flexihash",
"version": "v2.0.2",
"source": {
"type": "git",
"url": "https://github.com/pda/flexihash.git",
"reference": "497ba5782606d998f8ab0b4e5942e3a799bec018"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/pda/flexihash/zipball/497ba5782606d998f8ab0b4e5942e3a799bec018",
"reference": "497ba5782606d998f8ab0b4e5942e3a799bec018",
"shasum": ""
},
"require": {
"php": ">=5.4.0"
},
"require-dev": {
"phpunit/phpunit": "^4.8",
"satooshi/php-coveralls": "~1.0",
"squizlabs/php_codesniffer": "^2.3",
"symfony/config": "^2.0.0",
"symfony/console": "^2.0.0",
"symfony/filesystem": "^2.0.0",
"symfony/stopwatch": "^2.0.0",
"symfony/yaml": "^2.0.0"
},
"type": "library",
"autoload": {
"psr-4": {
"Flexihash\\": "src/"
}
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Paul Annesley",
"email": "paul@annesley.cc",
"homepage": "http://paul.annesley.cc"
},
{
"name": "Dom Morgan",
"email": "dom@d3r.com",
"homepage": "https://d3r.com"
}
],
"description": "Flexihash is a small PHP library which implements consistent hashing",
"homepage": "https://github.com/pda/flexihash",
"time": "2016-04-22T21:03:23+00:00"
},
{
"name": "wpackagist-plugin/hyperdb",
"version": "1.6",
"source": {
"type": "svn",
"url": "https://plugins.svn.wordpress.org/hyperdb/",
"reference": "tags/1.6"
},
"dist": {
"type": "zip",
"url": "https://downloads.wordpress.org/plugin/hyperdb.1.6.zip",
"reference": null,
"shasum": null
},
"require": {
"composer/installers": "~1.0"
},
"type": "wordpress-plugin",
"homepage": "https://wordpress.org/plugins/hyperdb/"
}
],
"packages-dev": [],
"aliases": [],
"minimum-stability": "stable",
"stability-flags": [],
"prefer-stable": false,
"prefer-lowest": false,
"platform": [],
"platform-dev": []
}
r2db/flexihash.php deleted 100644 → 0
+ 0
− 363
View file @ 22b4cd99
<?php
/**
* Flexihash - A simple consistent hashing implementation for PHP.
*
* The MIT License
*
* Copyright (c) 2008 Paul Annesley
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @author Paul Annesley
* @link http://paul.annesley.cc/
* @copyright Paul Annesley, 2008
*/
/**
* A simple consistent hashing implementation with pluggable hash algorithms.
*
* @author Paul Annesley
* @package Flexihash
* @licence http://www.opensource.org/licenses/mit-license.php
*/
class Flexihash
{
/**
* The number of positions to hash each target to.
*
* @var int
*/
private $_replicas = 64;
/**
* The hash algorithm, encapsulated in a Flexihash_Hasher implementation.
* @var object Flexihash_Hasher
*/
private $_hasher;
/**
* Internal counter for current number of targets.
* @var int
*/
private $_targetCount = 0;
/**
* Internal map of positions (hash outputs) to targets
* @var array { position => target, ... }
*/
private $_positionToTarget = array();
/**
* Internal map of targets to lists of positions that target is hashed to.
* @var array { target => [ position, position, ... ], ... }
*/
private $_targetToPositions = array();
/**
* Whether the internal map of positions to targets is already sorted.
* @var boolean
*/
private $_positionToTargetSorted = false;
/**
* Constructor
* @param object $hasher Flexihash_Hasher
* @param int $replicas Amount of positions to hash each target to.
*/
public function __construct(Flexihash_Hasher $hasher = null, $replicas = null)
{
$this->_hasher = $hasher ? $hasher : new Flexihash_Crc32Hasher();
if (!empty($replicas)) $this->_replicas = $replicas;
}
/**
* Add a target.
* @param string $target
* @param float $weight
* @chainable
*/
public function addTarget($target, $weight=1)
{
if (isset($this->_targetToPositions[$target]))
{
throw new Flexihash_Exception("Target '$target' already exists.");
}
$this->_targetToPositions[$target] = array();
// hash the target into multiple positions
for ($i = 0; $i < round($this->_replicas*$weight); $i++)
{
$position = $this->_hasher->hash($target . $i);
$this->_positionToTarget[$position] = $target; // lookup
$this->_targetToPositions[$target] []= $position; // target removal
}
$this->_positionToTargetSorted = false;
$this->_targetCount++;
return $this;
}
/**
* Add a list of targets.
* @param array $targets
* @param float $weight
* @chainable
*/
public function addTargets($targets, $weight=1)
{
foreach ($targets as $target)
{
$this->addTarget($target,$weight);
}
return $this;
}
/**
* Remove a target.
* @param string $target
* @chainable
*/
public function removeTarget($target)
{
if (!isset($this->_targetToPositions[$target]))
{
throw new Flexihash_Exception("Target '$target' does not exist.");
}
foreach ($this->_targetToPositions[$target] as $position)
{
unset($this->_positionToTarget[$position]);
}
unset($this->_targetToPositions[$target]);
$this->_targetCount--;
return $this;
}
/**
* A list of all potential targets
* @return array
*/
public function getAllTargets()
{
return array_keys($this->_targetToPositions);
}
/**
* Looks up the target for the given resource.
* @param string $resource
* @return string
*/
public function lookup($resource)
{
$targets = $this->lookupList($resource, 1);
if (empty($targets)) throw new Flexihash_Exception('No targets exist');
return $targets[0];
}
/**
* Get a list of targets for the resource, in order of precedence.
* Up to $requestedCount targets are returned, less if there are fewer in total.
*
* @param string $resource
* @param int $requestedCount The length of the list to return
* @return array List of targets
*/
public function lookupList($resource, $requestedCount)
{
if (!$requestedCount)
throw new Flexihash_Exception('Invalid count requested');
// handle no targets
if (empty($this->_positionToTarget))
return array();
// optimize single target
if ($this->_targetCount == 1)
return array_unique(array_values($this->_positionToTarget));
// hash resource to a position
$resourcePosition = $this->_hasher->hash($resource);
$results = array();
$collect = false;
$this->_sortPositionTargets();
// search values above the resourcePosition
foreach ($this->_positionToTarget as $key => $value)
{
// start collecting targets after passing resource position
if (!$collect && $key > $resourcePosition)
{
$collect = true;
}
// only collect the first instance of any target
if ($collect && !in_array($value, $results))
{
$results []= $value;
}
// return when enough results, or list exhausted
if (count($results) == $requestedCount || count($results) == $this->_targetCount)
{
return $results;
}
}
// loop to start - search values below the resourcePosition
foreach ($this->_positionToTarget as $key => $value)
{
if (!in_array($value, $results))
{
$results []= $value;
}
// return when enough results, or list exhausted
if (count($results) == $requestedCount || count($results) == $this->_targetCount)
{
return $results;
}
}
// return results after iterating through both "parts"
return $results;
}
public function __toString()
{
return sprintf(
'%s{targets:[%s]}',
get_class($this),
implode(',', $this->getAllTargets())
);
}
// ----------------------------------------
// private methods
/**
* Sorts the internal mapping (positions to targets) by position
*/
private function _sortPositionTargets()
{
// sort by key (position) if not already
if (!$this->_positionToTargetSorted)
{
ksort($this->_positionToTarget, SORT_REGULAR);
$this->_positionToTargetSorted = true;
}
}
}
/**
* Hashes given values into a sortable fixed size address space.
*
* @author Paul Annesley
* @package Flexihash
* @licence http://www.opensource.org/licenses/mit-license.php
*/
interface Flexihash_Hasher
{
/**
* Hashes the given string into a 32bit address space.
*
* Note that the output may be more than 32bits of raw data, for example
* hexidecimal characters representing a 32bit value.
*
* The data must have 0xFFFFFFFF possible values, and be sortable by
* PHP sort functions using SORT_REGULAR.
*
* @param string
* @return mixed A sortable format with 0xFFFFFFFF possible values
*/
public function hash($string);
}
/**
* Uses CRC32 to hash a value into a signed 32bit int address space.
* Under 32bit PHP this (safely) overflows into negatives ints.
*
* @author Paul Annesley
* @package Flexihash
* @licence http://www.opensource.org/licenses/mit-license.php
*/
class Flexihash_Crc32Hasher
implements Flexihash_Hasher
{
/* (non-phpdoc)
* @see Flexihash_Hasher::hash()
*/
public function hash($string)
{
return crc32($string);
}
}
/**
* Uses CRC32 to hash a value into a 32bit binary string data address space.
*
* @author Paul Annesley
* @package Flexihash
* @licence http://www.opensource.org/licenses/mit-license.php
*/
class Flexihash_Md5Hasher
implements Flexihash_Hasher
{
/* (non-phpdoc)
* @see Flexihash_Hasher::hash()
*/
public function hash($string)
{
return substr(md5($string), 0, 8); // 8 hexits = 32bit
// 4 bytes of binary md5 data could also be used, but
// performance seems to be the same.
}
}
/**
* An exception thrown by Flexihash.
*
* @author Paul Annesley
* @package Flexihash
* @licence http://www.opensource.org/licenses/mit-license.php
*/
class Flexihash_Exception extends Exception
{
}
r2db/db-backends.php → src/db-backends.php
+ 0
− 0
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File moved
r2db/db-hash.php → src/db-hash.php
+ 2
− 1
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<?php
require_once(dirname(__FILE__) . '/flexihash.php');
require __DIR__ . '../vendor/autoload.php';
require_once( ABSPATH . 'wp-config.php' );
$wpdb->hash_map = new Flexihash(null, R2DB_FLEXIHASH_REPLICAS);
......
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