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Disable InProcessCache plugin for CLI scripts, which are more likely to be long-running, greatly increasing the chance of data corruption.

This commit is contained in:
Brion Vibber 2010-12-09 10:24:06 -08:00
parent 99f3964394
commit f947fe5d0c
1 changed files with 24 additions and 6 deletions
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30
plugins/InProcessCache/InProcessCachePlugin.php
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@ -58,6 +58,22 @@ class InProcessCachePlugin extends Plugin
{
private $_items = array();
private $_hits = array();
private $active;
/**
* Constructor checks if it's safe to use the in-process cache.
* On CLI scripts, we'll disable ourselves to avoid data corruption
* due to keeping stale data around.
*
* On web requests we'll roll the dice; they're short-lived so have
* less chance of stale data. Race conditions are still possible,
* so beware!
*/
function __construct()
{
parent::__construct();
$this->active = (PHP_SAPI != 'cli');
}
/**
* Get an item from the cache
@ -75,7 +91,7 @@ class InProcessCachePlugin extends Plugin
function onStartCacheGet(&$key, &$value)
{
if (array_key_exists($key, $this->_items)) {
if ($this->active && array_key_exists($key, $this->_items)) {
$value = $this->_items[$key];
if (array_key_exists($key, $this->_hits)) {
$this->_hits[$key]++;
@ -103,8 +119,8 @@ class InProcessCachePlugin extends Plugin
function onEndCacheGet($key, &$value)
{
if (!array_key_exists($key, $this->_items) ||
$this->_items[$key] != $value) {
if ($this->active && (!array_key_exists($key, $this->_items) ||
$this->_items[$key] != $value)) {
$this->_items[$key] = $value;
}
return true;
@ -126,7 +142,9 @@ class InProcessCachePlugin extends Plugin
function onEndCacheSet($key, $value, $flag, $expiry)
{
$this->_items[$key] = $value;
if ($this->active) {
$this->_items[$key] = $value;
}
return true;
}
@ -144,7 +162,7 @@ class InProcessCachePlugin extends Plugin
function onStartCacheDelete(&$key, &$success)
{
if (array_key_exists($key, $this->_items)) {
if ($this->active && array_key_exists($key, $this->_items)) {
unset($this->_items[$key]);
}
return true;
@ -182,7 +200,7 @@ class InProcessCachePlugin extends Plugin
function cleanup()
{
if (common_config('inprocess', 'stats')) {
if ($this->active && common_config('inprocess', 'stats')) {
$this->log(LOG_INFO, "cache size: " .
count($this->_items));
$sum = 0;