102 lines
3.7 KiB
PHP
102 lines
3.7 KiB
PHP
<?php
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/**
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* Table Definition for irc_waiting_message
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*/
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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class Irc_waiting_message extends Managed_DataObject {
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public $__table = 'irc_waiting_message'; // table name
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public $id; // int primary_key not_null auto_increment
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public $data; // blob not_null
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public $prioritise; // tinyint(1) not_null
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public $attempts; // int not_null
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public $claimed; // datetime()
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public $created; // datetime() not_null
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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public static function schemaDef()
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{
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return array(
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'fields' => array(
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'id' => array('type' => 'int', 'not null' => true, 'description' => 'Unique ID for entry'),
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'data' => array('type' => 'blob', 'not null' => true, 'description' => 'data blob'),
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'prioritise' => array('type' => 'int', 'size' => 'tiny', 'description' => 'tinyint priority value'),
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'attempts' => array('type' => 'int', 'not null' => true, 'description' => 'attempts count'),
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'claimed' => array('type' => 'datetime', 'description' => 'date this irc message was claimed'),
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'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
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'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
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),
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'primary key' => array('id'),
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'indexes' => array(
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'irc_waiting_message_prioritise_idx' => array('prioritise'),
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),
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);
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}
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/**
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* Get the next item in the queue
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*
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* @return Irc_waiting_message Next message if there is one
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*/
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public static function top() {
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$wm = new Irc_waiting_message();
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$wm->orderBy('prioritise DESC, created');
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$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 IRC 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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* Increment the attempts count
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*
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* @return void
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* @throws Exception
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*/
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public function incAttempts() {
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$orig = clone($this);
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$this->attempts++;
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$result = $this->update($orig);
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if (!$result) {
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// TRANS: Exception thrown when an IRC attempts count could not be updated.
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// TRANS: %d is the object ID for which the count could not be updated.
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throw Exception(sprintf(_m('Could not increment attempts count for %d.'), $this->id));
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}
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}
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/**
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* Release a claimed item.
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*/
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public function releaseClaim() {
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// DB_DataObject doesn't let us save nulls right now
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$sql = sprintf("UPDATE irc_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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