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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
*
* Logs cache access
*
* PHP version 5
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Cache
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Log cache access
*
* Note that since most caching plugins return false for StartCache*
* methods, you should add this plugin before them, i.e.
*
* addPlugin('CacheLog');
* addPlugin('XCache');
*
* @category Cache
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class CacheLogPlugin extends Plugin
{
function onStartCacheGet(&$key, &$value)
{
$this->log(LOG_INFO, "Fetching key '$key'");
return true;
}
function onEndCacheGet($key, &$value)
{
if ($value === false) {
$this->log(LOG_INFO, sprintf('Cache MISS for key "%s"', $key));
} else {
$this->log(LOG_INFO, sprintf('Cache HIT for key "%s": %s', $key, self::showValue($value)));
}
return true;
}
function onStartCacheSet(&$key, &$value, &$flag, &$expiry, &$success)
{
$this->log(LOG_INFO, "Begin setting cache value for key '$key'");
return true;
}
function onEndCacheSet($key, $value, $flag, $expiry)
{
$this->log(LOG_INFO, sprintf('Set cache value %s for key "%s" (flags: %d, expiry %d)',
self::showValue($value),
$key,
$flag,
$expiry));
return true;
}
function onStartCacheDelete(&$key, &$success)
{
$this->log(LOG_INFO, "Deleting cache value for key '$key'");
return true;
}
function onEndCacheDelete($key)
{
$this->log(LOG_INFO, "Done deleting cache value for key '$key'");
return true;
}
function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'CacheLog',
'version' => STATUSNET_VERSION,
'author' => 'Evan Prodromou',
'homepage' => 'http://status.net/wiki/Plugin:CacheLog',
'description' =>
_m('Log reads and writes to the cache.'));
return true;
}
static function showValue($value)
{
if (is_object($value)) {
return sprintf('object of class %s', get_class($value));
} else if (is_array($value)) {
return sprintf('array of length %d', count($value));
} else if (is_string($value)) {
return sprintf('string "%s"', $value);
} else if (is_integer($value)) {
return sprintf('integer %d', $value);
} else if (is_null($value)) {
return 'null';
} else {
return 'unknown';
}
}
}
|
