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Twitter-compatible API - since_id and before_id were polluting the cache and generating bad SQL

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(Also cleaned out some extra whitespace.)

darcs-hash:20081104053359-462f3-2f6619bb942aa34b38dd82cb427878f83d4c332c.gz
This commit is contained in:
zach 2008-11-04 00:33:59 -05:00
parent 5f05134110
commit 8deac7248e
2 changed files with 90 additions and 107 deletions
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158
classes/Notice.php
View File

@ -29,7 +29,7 @@ require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
define('NOTICE_CACHE_WINDOW', 61);
class Notice extends Memcached_DataObject
class Notice extends Memcached_DataObject
{
###START_AUTOCODE
/* the code below is auto generated do not remove the above tag */
@ -38,14 +38,14 @@ class Notice extends Memcached_DataObject
public $id; // int(4) primary_key not_null
public $profile_id; // int(4) not_null
public $uri; // varchar(255) unique_key
public $content; // varchar(140)
public $rendered; // text()
public $url; // varchar(255)
public $content; // varchar(140)
public $rendered; // text()
public $url; // varchar(255)
public $created; // datetime() not_null
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
public $reply_to; // int(4)
public $is_local; // tinyint(1)
public $source; // varchar(32)
public $reply_to; // int(4)
public $is_local; // tinyint(1)
public $source; // varchar(32)
/* Static get */
function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('Notice',$k,$v); }
@ -63,14 +63,14 @@ class Notice extends Memcached_DataObject
$this->blowInboxes();
parent::delete();
}
function saveTags() {
/* extract all #hastags */
$count = preg_match_all('/(?:^|\s)#([A-Za-z0-9_\-\.]{1,64})/', strtolower($this->content), $match);
if (!$count) {
return true;
}
/* elide characters we don't want in the tag */
$match[1] = str_replace(array('-', '_', '.'), '', $match[1]);
@ -92,7 +92,7 @@ class Notice extends Memcached_DataObject
}
static function saveNew($profile_id, $content, $source=NULL, $is_local=1, $reply_to=NULL, $uri=NULL) {
$notice = new Notice();
$notice->profile_id = $profile_id;
$notice->is_local = $is_local;
@ -102,7 +102,7 @@ class Notice extends Memcached_DataObject
$notice->rendered = common_render_content($notice->content, $notice);
$notice->source = $source;
$notice->uri = $uri;
$id = $notice->insert();
if (!$id) {
@ -122,13 +122,13 @@ class Notice extends Memcached_DataObject
}
# XXX: do we need to change this for remote users?
common_save_replies($notice);
$notice->saveTags();
# Clear the cache for subscribed users, so they'll update at next request
# XXX: someone clever could prepend instead of clearing the cache
if (common_config('memcached', 'enabled')) {
$notice->blowCaches();
}
@ -159,20 +159,20 @@ class Notice extends Memcached_DataObject
unset($tag);
}
}
function blowSubsCache() {
$cache = common_memcache();
if ($cache) {
$user = new User();
$user->query('SELECT id ' .
'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
'WHERE subscription.subscribed = ' . $this->profile_id);
while ($user->fetch()) {
$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id));
}
$user->free();
unset($user);
}
@ -225,22 +225,59 @@ class Notice extends Memcached_DataObject
unset($fave);
}
}
static function getStream($qry, $cachekey, $offset=0, $limit=20) {
static function getStream($qry, $cachekey, $offset=0, $limit=20, $since_id=0, $before_id=0) {
if (common_config('memcached', 'enabled')) {
return Notice::getCachedStream($qry, $cachekey, $offset, $limit);
} else {
return Notice::getStreamDirect($qry, $offset, $limit);
# Skip the cache if this is a since_id or before_id qry
if ($since_id > 0 || $before_id > 0) {
return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id);
} else {
return Notice::getCachedStream($qry, $cachekey, $offset, $limit);
}
}
return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id);
}
static function getStreamDirect($qry, $offset, $limit) {
static function getStreamDirect($qry, $offset, $limit, $since_id, $before_id) {
$needAnd = FALSE;
$needWhere = TRUE;
if (preg_match('/\bWHERE\b/i', $qry)) {
$needWhere = FALSE;
$needAnd = TRUE;
}
if ($since_id > 0) {
if ($needWhere) {
$qry .= ' WHERE ';
$needWhere = FALSE;
} else {
$qry .= ' AND ';
}
$qry .= ' notice.id > ' . $since_id;
}
if ($before_id > 0) {
if ($needWhere) {
$qry .= ' WHERE ';
$needWhere = FALSE;
} else {
$qry .= ' AND ';
}
$qry .= ' notice.id < ' . $before_id;
}
$qry .= ' ORDER BY notice.created DESC, notice.id DESC ';
if(common_config('db','type')=='pgsql') {
if (common_config('db','type') == 'pgsql') {
$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
} else {
$qry .= ' LIMIT ' . $offset . ', ' . $limit;
@ -249,33 +286,33 @@ class Notice extends Memcached_DataObject
$notice = new Notice();
$notice->query($qry);
return $notice;
}
static function getCachedStream($qry, $cachekey, $offset, $limit) {
# If outside our cache window, just go to the DB
if ($offset + $limit > NOTICE_CACHE_WINDOW) {
return Notice::getStreamDirect($qry, $offset, $limit);
}
# Get the cache; if we can't, just go to the DB
$cache = common_memcache();
if (!$cache) {
return Notice::getStreamDirect($qry, $offset, $limit);
}
# Get the notices out of the cache
$notices = $cache->get(common_cache_key($cachekey));
# On a cache hit, return a DB-object-like wrapper
if ($notices !== FALSE) {
$wrapper = new NoticeWrapper(array_slice($notices, $offset, $limit));
return $wrapper;
@ -284,15 +321,15 @@ class Notice extends Memcached_DataObject
# Otherwise, get the full cache window out of the DB
$notice = Notice::getStreamDirect($qry, 0, NOTICE_CACHE_WINDOW);
# If there are no hits, just return the value
if (!$notice) {
return $notice;
}
# Pack results into an array
$notices = array();
while ($notice->fetch()) {
@ -300,18 +337,18 @@ class Notice extends Memcached_DataObject
}
# Store the array in the cache for next time
$result = $cache->set(common_cache_key($cachekey), $notices);
# return a wrapper of the array for use now
$wrapper = new NoticeWrapper(array_slice($notices, $offset, $limit));
return $wrapper;
}
function publicStream($offset=0, $limit=20, $since_id=0, $before_id=0) {
$needAnd = FALSE;
$needWhere = TRUE;
@ -323,54 +360,33 @@ class Notice extends Memcached_DataObject
$needAnd = TRUE;
}
// NOTE: since_id and before_id are extensions to Twitter API
if ($since_id > 0) {
if ($needWhere)
$qry .= ' WHERE ';
if ($needAnd)
$qry .= ' AND ';
$qry .= ' notice.id > ' . $since_id . ' ';
$needAnd = FALSE;
$needWhere = FALSE;
}
if ($before_id > 0) {
if ($needWhere)
$qry .= ' WHERE ';
if ($needAnd)
$qry .= ' AND ';
$qry .= ' notice.id < ' . $before_id . ' ';
$needAnd = FALSE;
$needWhere = FALSE;
}
return Notice::getStream($qry,
'public',
$offset, $limit);
$offset, $limit, $since_id, $before_id);
}
function addToInboxes() {
$inbox = new Notice_inbox();
$inbox->query('INSERT INTO notice_inbox (user_id, notice_id) ' .
'SELECT user.id, ' . $this->id . ' ' .
'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
'WHERE subscription.subscribed = ' . $this->profile_id);
return;
}
# Delete from inboxes if we're deleted.
function blowInboxes() {
$inbox = new Notice_inbox();
$inbox->notice_id = $this->id;
$inbox->delete();
return;
}
}

39
classes/User.php
View File

@ -297,20 +297,9 @@ class User extends Memcached_DataObject
'FROM notice JOIN reply ON notice.id = reply.notice_id ' .
'WHERE reply.profile_id = %d ';
if ($since_id > 0) {
$qry .= ' AND notice.id > ' . $since_id . ' ';
$needAnd = FALSE;
}
// NOTE: before_id is an extension to Twitter API
if ($before_id > 0) {
$qry .= ' AND notice.id < ' . $before_id . ' ';
$needAnd = FALSE;
}
return Notice::getStream(sprintf($qry, $this->id),
'user:replies:'.$this->id,
$offset, $limit);
$offset, $limit, $since_id, $before_id);
}
function getNotices($offset=0, $limit=NOTICES_PER_PAGE, $since_id=0, $before_id=0) {
@ -319,20 +308,9 @@ class User extends Memcached_DataObject
'FROM notice ' .
'WHERE profile_id = %d ';
if ($since_id > 0) {
$qry .= ' AND notice.id > ' . $since_id . ' ';
$needAnd = FALSE;
}
// NOTE: before_id is an extension to Twitter API
if ($before_id > 0) {
$qry .= ' AND notice.id < ' . $before_id . ' ';
$needAnd = FALSE;
}
return Notice::getStream(sprintf($qry, $this->id),
'user:notices:'.$this->id,
$offset, $limit);
$offset, $limit, $since_id, $before_id);
}
function favoriteNotices($offset=0, $limit=NOTICES_PER_PAGE) {
@ -352,20 +330,9 @@ class User extends Memcached_DataObject
'FROM notice JOIN notice_inbox ON notice.id = notice_inbox.notice_id ' .
'WHERE notice_inbox.user_id = %d ';
if ($since_id > 0) {
$qry .= ' AND notice.id > ' . $since_id . ' ';
$needAnd = FALSE;
}
// NOTE: before_id is an extension to Twitter API
if ($before_id > 0) {
$qry .= ' AND notice.id < ' . $before_id . ' ';
$needAnd = FALSE;
}
return Notice::getStream(sprintf($qry, $this->id),
'user:notices_with_friends:' . $this->id,
$offset, $limit);
$offset, $limit, $since_id, $before_id);
}
function blowFavesCache() {