Make cache type selectable based on config value

Provie a mechanism to specify cache type from NONE, APC, or MEMCACHE
based on a config variable.

If MEMCACHE type is selected, a list of servers can be specified to
provide multiserver support. Note that php-memcaced is required for
MEMCACHE support.

Lukas: Minor commenting style fixes.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
This commit is contained in:
elij 2011-05-29 23:27:55 +02:00 committed by Lukas Fleischer
parent 888db089c5
commit 5853097561
3 changed files with 92 additions and 46 deletions

View file

@ -13,12 +13,7 @@ set_lang();
include_once("config.inc.php");
include_once("version.inc.php");
include_once("acctfuncs.inc.php");
# Check if APC extension is loaded, and set cache prefix if it is.
if (!defined('EXTENSION_LOADED_APC')) {
define('EXTENSION_LOADED_APC', extension_loaded('apc'));
define('APC_PREFIX', 'aur:');
}
include_once("cachefuncs.inc.php");
# see if the visitor is already logged in
#
@ -263,46 +258,6 @@ function db_query($query="", $db_handle="") {
return $result;
}
# Set a value in the cache (currently APC) if cache is available for use. If
# not available, this becomes effectively a no-op (return value is
# false). Accepts an optional TTL (defaults to 600 seconds).
function set_cache_value($key, $value, $ttl=600) {
$status = false;
if (EXTENSION_LOADED_APC) {
$status = apc_store(APC_PREFIX.$key, $value, $ttl);
}
return $status;
}
# Get a value from the cache (currently APC) if cache is available for use. If
# not available, this returns false (optionally sets passed in variable $status
# to false, much like apc_fetch() behaves). This allows for testing the fetch
# result appropriately even in the event that a 'false' value was the value in
# the cache.
function get_cache_value($key, &$status=false) {
if(EXTENSION_LOADED_APC) {
$ret = apc_fetch(APC_PREFIX.$key, $status);
if ($status) {
return $ret;
}
}
return $status;
}
# Run a simple db query, retrieving and/or caching the value if APC is
# available for use. Accepts an optional TTL value (defaults to 600 seconds).
function db_cache_value($dbq, $dbh, $key, $ttl=600) {
$status = false;
$value = get_cache_value($key, $status);
if (!$status) {
$result = db_query($dbq, $dbh);
$row = mysql_fetch_row($result);
$value = $row[0];
set_cache_value($key, $value, $ttl);
}
return $value;
}
# set up the visitor's language
#
function set_lang() {