133 lines
4.7 KiB
PHP
133 lines
4.7 KiB
PHP
<?php
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/**
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* Table Definition for msn_waiting_message
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*/
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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class Msn_waiting_message extends Memcached_DataObject {
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public $__table = 'msn_waiting_message'; // table name
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public $id; // int primary_key not_null auto_increment
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public $screenname; // varchar(255) not_null
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public $message; // text not_null
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public $created; // datetime() not_null
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public $claimed; // datetime()
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/* Static get */
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public function staticGet($k, $v = null) {
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return Memcached_DataObject::staticGet('Msn_waiting_message', $k, $v);
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}
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/**
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* return table definition for DB_DataObject
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*
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* DB_DataObject needs to know something about the table to manipulate
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* instances. This method provides all the DB_DataObject needs to know.
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*
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* @return array array of column definitions
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*/
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public function table() {
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return array('id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
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'screenname' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
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'message' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
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'created' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
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'claimed' => DB_DATAOBJECT_STR);
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}
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/**
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* return key definitions for DB_DataObject
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*
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* DB_DataObject needs to know about keys that the table has, since it
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* won't appear in StatusNet's own keys list. In most cases, this will
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* simply reference your keyTypes() function.
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*
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* @return array list of key field names
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*/
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public function keys() {
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return array_keys($this->keyTypes());
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}
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/**
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* return key definitions for Memcached_DataObject
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*
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* Our caching system uses the same key definitions, but uses a different
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* method to get them. This key information is used to store and clear
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* cached data, so be sure to list any key that will be used for static
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* lookups.
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*
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* @return array associative array of key definitions, field name to type:
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* 'K' for primary key: for compound keys, add an entry for each component;
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* 'U' for unique keys: compound keys are not well supported here.
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*/
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public function keyTypes() {
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return array('id' => 'K');
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}
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/**
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* Magic formula for non-autoincrementing integer primary keys
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*
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* If a table has a single integer column as its primary key, DB_DataObject
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* assumes that the column is auto-incrementing and makes a sequence table
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* to do this incrementation. Since we don't need this for our class, we
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* overload this method and return the magic formula that DB_DataObject needs.
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*
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* @return array magic three-false array that stops auto-incrementing.
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*/
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function sequenceKey() {
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return array(false, false, false);
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}
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/**
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* @param string $screenname screenname or array of screennames to pull from
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* If not specified, checks all queues in the system.
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*/
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public static function top($screenname = null) {
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$wm = new Msn_waiting_message();
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if ($screenname) {
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if (is_array($screenname)) {
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// @fixme use safer escaping
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$list = implode("','", array_map('addslashes', $transports));
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$wm->whereAdd("screename in ('$list')");
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} else {
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$wm->screenname = $screenname;
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}
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}
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$wm->orderBy('created');
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$wm->whereAdd('claimed is null');
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$wm->limit(1);
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$cnt = $wm->find(true);
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if ($cnt) {
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# XXX: potential race condition
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# can we force it to only update if claimed is still null
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# (or old)?
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common_log(LOG_INFO, 'claiming msn waiting message id = ' . $wm->id);
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$orig = clone($wm);
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$wm->claimed = common_sql_now();
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$result = $wm->update($orig);
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if ($result) {
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common_log(LOG_INFO, 'claim succeeded.');
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return $wm;
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} else {
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common_log(LOG_INFO, 'claim failed.');
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}
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}
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$wm = null;
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return null;
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}
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/**
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* Release a claimed item.
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*/
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public function releaseClaim() {
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// DB_DataObject doesn't let us save nulls right now
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$sql = sprintf("UPDATE msn_waiting_message SET claimed=NULL WHERE id=%d", $this->id);
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$this->query($sql);
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$this->claimed = null;
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$this->encache();
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}
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}
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