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Don't save duplicate messages into a user's packed inbox. We've already got the packed box loaded at insert time, so we can simply unpack it and check before doing the update query. 

Should help with dupes that come in when inbox distrib jobs die and get restarted, etc.

Conflicts:

	classes/Inbox.php

Looks like this was implemented on master recently and not copied up to testing. Merging to my version on testing as I've added some doc comments and extracted a couple functions for future ease of use.
This commit is contained in:
Brion Vibber 2010-04-02 15:45:03 -07:00
parent 6cd0637e55
commit ec24f283dd
1 changed files with 34 additions and 9 deletions
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43
classes/Inbox.php
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@ -96,12 +96,23 @@ class Inbox extends Memcached_DataObject
$inbox = new Inbox();
$inbox->user_id = $user_id;
$inbox->notice_ids = call_user_func_array('pack', array_merge(array('N*'), $ids));
$inbox->pack($ids);
$inbox->fake = true;
return $inbox;
}
/**
* Append the given notice to the given user's inbox.
* Caching updates are managed for the inbox itself.
*
* If the notice is already in this inbox, the second
* add will be silently dropped.
*
* @param int @user_id
* @param int $notice_id
* @return boolean success
*/
static function insertNotice($user_id, $notice_id)
{
$inbox = DB_DataObject::staticGet('inbox', 'user_id', $user_id);
@ -114,13 +125,10 @@ class Inbox extends Memcached_DataObject
return false;
}
$ids = unpack('N*', $inbox->notice_ids);
// bulk inserts sometimes fail and get restarted.
// Skip if this one has been inserted before.
if (in_array($notice_id, $ids)) {
// effectively successful
$ids = $inbox->unpack();
if (in_array(intval($notice_id), $ids)) {
// Already in there, we probably re-ran some inbox adds
// due to an error. Skip the dupe silently.
return true;
}
@ -160,7 +168,7 @@ class Inbox extends Memcached_DataObject
}
}
$ids = unpack('N*', $inbox->notice_ids);
$ids = $inbox->unpack();
if (!empty($since_id)) {
$newids = array();
@ -239,4 +247,21 @@ class Inbox extends Memcached_DataObject
}
return new ArrayWrapper($items);
}
/**
* Saves a list of integer notice_ids into a packed blob in this object.
* @param array $ids list of integer notice_ids
*/
protected function pack(array $ids)
{
$this->notice_ids = call_user_func_array('pack', array_merge(array('N*'), $ids));
}
/**
* @return array of integer notice_ids
*/
protected function unpack()
{
return unpack('N*', $this->notice_ids);
}
}