Lock now can use the memcache as well
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parent
d2cb87a200
commit
bca5776e9c
2 changed files with 104 additions and 12 deletions
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@ -2,6 +2,7 @@
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use Friendica\App;
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use Friendica\Core\Config;
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use Friendica\Util\Lock;
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if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
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$directory = dirname($_SERVER["argv"][0]);
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@ -19,16 +20,12 @@ require_once("boot.php");
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function poller_run($argv, $argc){
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global $a, $db;
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if (is_null($a)) {
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$a = new App(dirname(__DIR__));
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}
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$a = new App(dirname(__DIR__));
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if(is_null($db)) {
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@include(".htconfig.php");
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require_once("include/dba.php");
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$db = new dba($db_host, $db_user, $db_pass, $db_data);
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unset($db_host, $db_user, $db_pass, $db_data);
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};
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@include(".htconfig.php");
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require_once("include/dba.php");
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$db = new dba($db_host, $db_user, $db_pass, $db_data);
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unset($db_host, $db_user, $db_pass, $db_data);
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Config::load();
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@ -41,6 +38,10 @@ function poller_run($argv, $argc){
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load_hooks();
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if (($argc <= 1) OR ($argv[1] != "no_cron")) {
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poller_run_cron();
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}
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$a->start_process();
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if ($a->min_memory_reached()) {
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@ -55,11 +56,11 @@ function poller_run($argv, $argc){
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return;
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}
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if(($argc <= 1) OR ($argv[1] != "no_cron")) {
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poller_run_cron();
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if ($a->max_processes_reached()) {
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return;
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}
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if ($a->max_processes_reached()) {
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if (!Lock::set('poller_worker')) {
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return;
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}
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@ -69,6 +70,8 @@ function poller_run($argv, $argc){
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return;
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}
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Lock::remove('poller_worker');
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$starttime = time();
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while ($r = poller_worker_process()) {
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@ -83,12 +86,18 @@ function poller_run($argv, $argc){
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return;
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}
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if (!Lock::set('poller_worker')) {
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return;
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}
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// Count active workers and compare them with a maximum value that depends on the load
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if (poller_too_much_workers()) {
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logger('Active worker limit reached, quitting.', LOGGER_DEBUG);
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return;
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}
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Lock::remove('poller_worker');
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if (!poller_execute($r[0])) {
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logger('Process execution failed, quitting.', LOGGER_DEBUG);
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return;
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@ -724,6 +733,8 @@ function poller_run_cron() {
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if (array_search(__file__,get_included_files())===0){
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poller_run($_SERVER["argv"],$_SERVER["argc"]);
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Lock::removeAll();
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poller_unclaim_process();
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get_app()->end_process();
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@ -8,6 +8,8 @@ namespace Friendica\Util;
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*
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*/
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use Friendica\Core\Config;
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use Memcache;
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use dba;
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use dbm;
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@ -15,6 +17,31 @@ use dbm;
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* @brief This class contain Functions for preventing parallel execution of functions
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*/
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class Lock {
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/**
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* @brief Check for memcache and open a connection if configured
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*
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* @return object|boolean The memcache object - or "false" if not successful
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*/
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public static function memcache() {
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if (!function_exists('memcache_connect')) {
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return false;
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}
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if (!Config::get('system', 'memcache')) {
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return false;
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}
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$memcache_host = Config::get('system', 'memcache_host', '127.0.0.1');
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$memcache_port = Config::get('system', 'memcache_port', 11211);
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$memcache = new Memcache;
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if (!$memcache->connect($memcache_host, $memcache_port)) {
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return false;
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}
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return $memcache;
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}
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/**
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* @brief Sets a lock for a given name
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@ -33,6 +60,33 @@ class Lock {
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$got_lock = false;
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$start = time();
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$memcache = self::memcache();
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if (is_object($memcache)) {
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$cachekey = get_app()->get_hostname().";lock:".$fn_name;
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do {
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$lock = $memcache->get($cachekey);
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if (!is_bool($lock)) {
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$pid = (int)$lock;
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// When the process id isn't used anymore, we can safely claim the lock for us.
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// Or we do want to lock something that was already locked by us.
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if (!posix_kill($pid, 0) OR ($pid == getmypid())) {
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$lock = false;
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}
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}
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if (is_bool($lock)) {
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$memcache->set($cachekey, getmypid(), MEMCACHE_COMPRESSED, 300);
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$got_lock = true;
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}
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if (!$got_lock) {
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sleep($wait_sec);
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}
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} while (!$got_lock AND ((time() - $start) < $timeout));
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return $got_lock;
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}
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do {
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dba::lock('locks');
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$lock = dba::select('locks', array('locked', 'pid'), array('name' => $fn_name), array('limit' => 1));
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@ -73,7 +127,34 @@ class Lock {
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* @param string $fn_name Name of the lock
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*/
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public static function remove($fn_name) {
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$memcache = self::memcache();
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if (is_object($memcache)) {
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$cachekey = get_app()->get_hostname().";lock:".$fn_name;
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$lock = $memcache->get($cachekey);
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if (!is_bool($lock)) {
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if ((int)$lock == getmypid()) {
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$memcache->delete($cachekey);
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}
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}
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return;
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}
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dba::update('locks', array('locked' => false, 'pid' => 0), array('name' => $fn_name, 'pid' => getmypid()));
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return;
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}
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/**
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* @brief Removes all lock that were set by us
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*/
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public static function removeAll() {
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$memcache = self::memcache();
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if (is_object($memcache)) {
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// We cannot delete all cache entries, but this doesn't matter with memcache
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return;
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}
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dba::update('locks', array('locked' => false, 'pid' => 0), array('pid' => getmypid()));
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return;
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}
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}
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