GNUsocial/gnu-social
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Change to avoid a join in notice inbox

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The join in notice_inbox is causing temp-table sorting on identi.ca,
so I'm trying a finer-tuned approach.
This commit is contained in:
Evan Prodromou
2009-04-28 13:07:05 -04:00
parent ce5b98ca01
commit c7105c2af1
3 changed files with 127 additions and 34 deletions
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101
classes/Notice_inbox.php
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@@ -1,7 +1,7 @@
<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
* Copyright (C) 2008, 2009, Control Yourself, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
@@ -21,7 +21,11 @@ if (!defined('LACONICA')) { exit(1); }
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
class Notice_inbox extends Memcached_DataObject
// We keep 5 pages of inbox notices in memcache, +1 for pagination check
define('INBOX_CACHE_WINDOW', 101);
class Notice_inbox extends Memcached_DataObject
{
###START_AUTOCODE
/* the code below is auto generated do not remove the above tag */
@@ -38,4 +42,97 @@ class Notice_inbox extends Memcached_DataObject
/* the code above is auto generated do not remove the tag below */
###END_AUTOCODE
function stream($user_id, $offset=0, $limit=20, $since_id=0, $before_id=0, $since=null)
{
$cache = common_memcache();
if (empty($cache) ||
$since_id != 0 || $before_id != 0 || !is_null($since) ||
($offset + $limit) > INBOX_CACHE_WINDOW) {
common_debug('Doing direct DB hit for notice_inbox since the params are screwy.');
return Notice_inbox::_streamDirect($user_id, $offset, $limit, $since_id, $before_id, $since);
}
$idkey = common_cache_key('notice_inbox:by_user:'.$user_id);
$idstr = $cache->get($idkey);
if (!empty($idstr)) {
// Cache hit! Woohoo!
common_debug('Cache hit for notice_inbox.');
$window = explode(',', $idstr);
$ids = array_slice($window, $offset, $limit);
return $ids;
}
$laststr = common_cache_key($idkey.';last');
if (!empty($laststr)) {
common_debug('Cache hit for notice_inbox on last item.');
$window = explode(',', $laststr);
$last_id = $window[0];
$new_ids = Notice_inbox::_streamDirect($user_id, 0, INBOX_CACHE_WINDOW,
$last_id, null, null);
$new_window = array_merge($new_ids, $window);
$new_windowstr = implode(',', $new_window);
$result = $cache->set($idkey, $new_windowstr);
$result = $cache->set($idkey . ';last', $new_windowstr);
$ids = array_slice($new_window, $offset, $limit);
return $ids;
}
$window = Notice_inbox::_streamDirect($user_id, 0, INBOX_CACHE_WINDOW,
null, null, null);
$windowstr = implode(',', $new_window);
$result = $cache->set($idkey, $windowstr);
$result = $cache->set($idkey . ';last', $windowstr);
$ids = array_slice($window, $offset, $limit);
return $ids;
}
function _streamDirect($user_id, $offset, $limit, $since_id, $before_id, $since)
{
$inbox = new Notice_inbox();
$inbox->user_id = $user_id;
if ($since_id != 0) {
$inbox->whereAdd('notice_id > ' . $since_id);
}
if ($before_id != 0) {
$inbox->whereAdd('notice_id < ' . $before_id);
}
if (!is_null($since)) {
$inbox->whereAdd('created > \'' . date('Y-m-d H:i:s', $since) . '\'');
}
$inbox->orderBy('notice_id DESC');
if (!is_null($offset)) {
$inbox->limit($offset, $limit);
}
$ids = array();
if ($inbox->find()) {
while ($inbox->fetch()) {
$ids[] = $inbox->notice_id;
}
}
return $ids;
}
}