From 5853097561cddd1a2405ac9d9b9659ca8772cc5e Mon Sep 17 00:00:00 2001 From: elij Date: Sun, 29 May 2011 23:27:55 +0200 Subject: 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 --- web/lib/aur.inc.php | 47 +------------------------ web/lib/cachefuncs.inc.php | 82 ++++++++++++++++++++++++++++++++++++++++++++ web/lib/config.inc.php.proto | 9 +++++ 3 files changed, 92 insertions(+), 46 deletions(-) create mode 100644 web/lib/cachefuncs.inc.php diff --git a/web/lib/aur.inc.php b/web/lib/aur.inc.php index 572d781..4c2cc55 100644 --- a/web/lib/aur.inc.php +++ b/web/lib/aur.inc.php @@ -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 $value; -} - # set up the visitor's language # function set_lang() { diff --git a/web/lib/cachefuncs.inc.php b/web/lib/cachefuncs.inc.php new file mode 100644 index 0000000..3485b01 --- /dev/null +++ b/web/lib/cachefuncs.inc.php @@ -0,0 +1,82 @@ +addServer($mcserver[0], intval($mcserver[1])); + } +} + +# Set a value in the cache (currently APC) if cache is available for use. If +# not available, this becomes effectively a no-op (return value is +# false). Accepts an optional TTL (defaults to 600 seconds). +function set_cache_value($key, $value, $ttl=600) { + $status = false; + if (defined('EXTENSION_LOADED_APC')) { + $status = apc_store(CACHE_PREFIX.$key, $value, $ttl); + } + if (defined('EXTENSION_LOADED_MEMCACHE')) { + global $memcache; + $status = $memcache->set(CACHE_PREFIX.$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(defined('EXTENSION_LOADED_APC')) { + $ret = apc_fetch(CACHE_PREFIX.$key, $status); + if ($status) { + return $ret; + } + } + if (defined('EXTENSION_LOADED_MEMCACHE')) { + global $memcache; + $ret = $memcache->get(CACHE_PREFIX.$key); + if (!$ret) { + $status = false; + } + else { + $status = true; + } + 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; +} + +?> diff --git a/web/lib/config.inc.php.proto b/web/lib/config.inc.php.proto index 43c64d2..f710844 100644 --- a/web/lib/config.inc.php.proto +++ b/web/lib/config.inc.php.proto @@ -24,6 +24,15 @@ define("DEFAULT_LANG", "en"); # development. Should not be enabled in production. Default to 0 (off). define("SQL_DEBUG", 0); +# Set cache type. Either "APC", "MEMCACHE", or "NONE". Defaults to NONE. +#define("CACHE_TYPE", "APC"); +#define("CACHE_TYPE", "MEMCACHE"); + +# If using memcache cache_type, list servers. You can separate multiple servers +# with a comma, ex: '127.0.0.1:11211,127.0.0.1:11212'. If undefined, defaults +# to '127.0.0.1:11211'. +#define("MEMCACHE_SERVERS", '127.0.0.1:11211'); + # Languages we have translations for $SUPPORTED_LANGS = array( "ca" => "Català", -- cgit v1.2.3-70-g09d2