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Use table cache_waypoint_pool to generate a list of unused waypoints and assign waypoints to new caches from this list.

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ocoliver
2012-11-04 22:16:39 +01:00
parent b298bfccc0
commit d6ae786829
7 changed files with 332 additions and 43 deletions
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htdocs/util2/cron/modules/cache_waypoint_pool.class.php
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<?php
/***************************************************************************
* For license information see doc/license.txt
*
* Unicode Reminder メモ
*
* This cronjob fills the table cache_waypoint_pool with waypoints that
* can be assigned to new caches. The code is cpu intensive on database
* server.
***************************************************************************/
checkJob(new cache_waypoint_pool());
class cache_waypoint_pool
{
var $name = 'cache_waypoint_pool';
var $interval = 604800; // once a week
function run()
{
global $opt;
$nLastInsertsCount = 1;
// check if the pool needs to be filled up and repeat until the
$nPoolSize = $this->getCurrentPoolSize();
if ($nPoolSize < $opt['logic']['waypoint_pool']['min_count'])
{
while (($nPoolSize < $opt['logic']['waypoint_pool']['max_count']) && ($nLastInsertsCount > 0))
{
$nLastInsertsCount = $this->fill($opt['logic']['waypoint_pool']['max_count'] - $nPoolSize);
$nPoolSize = $this->getCurrentPoolSize();
}
}
}
function getCurrentPoolSize()
{
return sql_value("SELECT COUNT(*) FROM `cache_waypoint_pool`", 0);
}
function fill($max_inserts_count)
{
global $opt;
$rowCount = 0;
$nInsertCount = 0;
if ($opt['logic']['waypoint_pool']['fill_gaps'] == true)
{
// query the first unused waypoint (between other waypoints)
$rsStartWp = sql("SELECT SQL_BUFFER_RESULT DECTOWP(WPTODEC(`c`.`wp_oc`, '&1')+1, '&1') AS `free_wp`
FROM `caches` AS `c`
LEFT JOIN `caches` as `cNext` ON DECTOWP(WPTODEC(`c`.`wp_oc`, '&1')+1, '&1')=`cNext`.`wp_oc`
LEFT JOIN `cache_waypoint_pool` ON DECTOWP(WPTODEC(`c`.`wp_oc` ,'&1')+1, '&1')=`cache_waypoint_pool`.`wp_oc`
WHERE `c`.`wp_oc` REGEXP '&2'
AND ISNULL(`cNext`.`wp_oc`)
AND ISNULL(`cache_waypoint_pool`.`wp_oc`)
ORDER BY `free_wp` ASC
LIMIT 250",
$opt['logic']['waypoint_pool']['prefix'],
'^' . $opt['logic']['waypoint_pool']['prefix'] . '[' . $opt['logic']['waypoint_pool']['valid_chars'] . ']{1,}$');
}
else
{
// query the last used waypoint
$rsStartWp = sql("SELECT SQL_BUFFER_RESULT DECTOWP(MAX(dec_wp)+1, '&2') AS `free_wp`
FROM (
SELECT MAX(WPTODEC(`wp_oc`, '&2')) AS dec_wp
FROM `caches`
WHERE `wp_oc` REGEXP '&1'
UNION
SELECT MAX(WPTODEC(`wp_oc`, '&2')) AS dec_wp
FROM `cache_waypoint_pool`
) AS tbl",
'^' . $opt['logic']['waypoint_pool']['prefix'] . '[' . $opt['logic']['waypoint_pool']['valid_chars'] . ']{1,}$',
$opt['logic']['waypoint_pool']['prefix']);
}
while (($rStartWp = sql_fetch_assoc($rsStartWp)) && ($nInsertCount < $max_inserts_count))
{
$free_wp = $rStartWp['free_wp'];
if ($free_wp == '') $free_wp = $opt['logic']['waypoint_pool']['prefix'] . '0001';
$nInsertCount += $this->fill_turn($free_wp, $max_inserts_count - $nInsertCount);
$rowCount++;
}
sql_free_result($rsStartWp);
if ($rowCount == 0)
{
// new database ...
$nInsertCount += $this->fill_turn($opt['logic']['waypoint_pool']['prefix'] . '0001', $max_inserts_count);
}
return $nInsertCount;
}
// search for the next free range and use that waypoints to fill the waypoint pool
function fill_turn($start_wp, $max_inserts_count)
{
global $opt;
// query the end of this waypoint range
$end_wp = sql_value("SELECT DECTOWP(MIN(dec_wp), '&3')
FROM (
SELECT MIN(WPTODEC(`wp_oc`, '&3')) AS dec_wp
FROM `caches`
WHERE WPTODEC(`wp_oc`, '&3')>WPTODEC('&1', '&3')
AND `wp_oc` REGEXP '&2'
UNION
SELECT MIN(WPTODEC(`wp_oc`, '&3')) AS dec_wp
FROM `cache_waypoint_pool`
WHERE WPTODEC(`wp_oc`, '&3')>WPTODEC('&1', '&3')
) AS tbl",
$opt['logic']['waypoint_pool']['prefix'] . '100000',
$start_wp,
'^' . $opt['logic']['waypoint_pool']['prefix'] . '[' . $opt['logic']['waypoint_pool']['valid_chars'] . ']{1,}$',
$opt['logic']['waypoint_pool']['prefix']);
// now, we have start and end waypoints ...
$nWaypointsGenerated = 0;
while (($nWaypointsGenerated < $max_inserts_count) && ($start_wp != $end_wp))
{
sql("INSERT INTO `cache_waypoint_pool` (`wp_oc`) VALUES ('&1')", $start_wp);
$nWaypointsGenerated++;
$start_wp = $this->increment_waypoint($start_wp, $opt['logic']['waypoint_pool']['prefix']);
}
return $nWaypointsGenerated;
}
// see mysql functions in doc/sql/stored-proc/maintain.php for explanation
function increment_waypoint($wp, $prefix)
{
global $opt;
$wp_chars = $opt['logic']['waypoint_pool']['valid_chars'];
$b36_chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
if (substr($wp, 0, 2) != $prefix)
return '';
$wp_value = substr($wp, 2);
$b36_value = '';
for ($i = 0; $i < strlen($wp_value); $i++)
$b36_value .= substr($b36_chars, strpos($wp_chars, substr($wp_value, $i, 1)), 1);
$dec_value = base_convert($b36_value, strlen($wp_chars), 10)+1;
$b36_value = strtoupper(base_convert($dec_value, 10, strlen($wp_chars)));
$wp_value = '';
for ($i = 0; $i < strlen($b36_value); $i++)
$wp_value .= substr($wp_chars, strpos($b36_chars, substr($b36_value, $i, 1)), 1);
if (strlen($wp_value) < 4)
return $prefix . substr('0000' . $wp_value, -4);
else
return $prefix . $wp_value;
}
}
?>