Merge branch 'master' of https://github.com/chrisboulton/php-resque

Author: Chaitanya Kuber

CHANGELOG.markdown

@@ -4,6 +4,13 @@
 * Use `require_once` when including php-resque after the app has been included in the sample resque.php to prevent include conflicts (andrewjshults)
 * Wrap job arguments in an array to improve compatibility with ruby resque (warezthebeef)
 * Fix a bug where the worker would spin out of control taking the server with it, if the redis connection was interrupted even briefly. Use SIGPIPE to trap this scenario cleanly. (d11wtq)
+* Added support of Redis prefix (namespaces) (hlegius)
+* When reserving jobs, check if the payload received from popping a queue is a valid object (fix bug whereby jobs are reserved based on an erroneous payload) (salimane)
+* Re-enable autoload for class_exists in Job.php (humancopy)
+* Fix lost jobs when there is more than one worker process started by the same parent process (salimane)
+* Move include for resque before APP_INCLUDE is loaded in, so that way resque is available for the app
+* Avoid working with dirty worker IDs (salimane)
+
 
 ## 1.1 (2011-03-27) ##
 

lib/Resque.php

@@ -19,6 +19,23 @@ class Resque
 	 */
 	public static $redis = null;
 
+	/**
+	 * @var mixed Host/port conbination separated by a colon, or a nested
+	 * array of server swith host/port pairs
+	 */
+	protected static $redisServer = null;
+
+	/**
+	 * @var int ID of Redis database to select.
+	 */
+	protected static $redisDatabase = 0;
+
+	/**
+	 * @var int PID of current process. Used to detect changes when forking
+	 *  and implement "thread" safety to avoid race conditions.
+	 */
+	 protected static $pid = null;
+
 	/**
 	 * Given a host/port combination separated by a colon, set it as
 	 * the redis server that Resque will talk to.
@@ -29,17 +46,9 @@ class Resque
 	 */
 	public static function setBackend($server, $database = 0)
 	{
-		if(is_array($server)) {
-			require_once dirname(__FILE__) . '/Resque/RedisCluster.php';
-			self::$redis = new Resque_RedisCluster($server);
-		}
-		else {
-			list($host, $port) = explode(':', $server);
-			require_once dirname(__FILE__) . '/Resque/Redis.php';
-			self::$redis = new Resque_Redis($host, $port);
-		}
-
-        self::redis()->select($database);
+		self::$redisServer   = $server;
+		self::$redisDatabase = $database;
+		self::$redis         = null;
 	}
 
 	/**
@@ -49,10 +58,40 @@ public static function setBackend($server, $database = 0)
 	 */
 	public static function redis()
 	{
-		if(is_null(self::$redis)) {
-			self::setBackend('localhost:6379');
+		// Detect when the PID of the current process has changed (from a fork, etc)
+		// and force a reconnect to redis.
+		$pid = getmypid();
+		if (self::$pid !== $pid) {
+			self::$redis = null;
+			self::$pid   = $pid;
+		}
+
+		if(!is_null(self::$redis)) {
+			return self::$redis;
+		}
+
+		$server = self::$redisServer;
+		if (empty($server)) {
+			$server = 'localhost:6379';
+		}
+
+		if(is_array($server)) {
+			require_once dirname(__FILE__) . '/Resque/RedisCluster.php';
+			self::$redis = new Resque_RedisCluster($server);
+		}
+		else {
+			if (strpos($server, 'unix:') === false) {
+				list($host, $port) = explode(':', $server);
+			}
+			else {
+				$host = $server;
+				$port = null;
+			}
+			require_once dirname(__FILE__) . '/Resque/Redis.php';
+			self::$redis = new Resque_Redis($host, $port);
 		}
 
+		self::$redis->select(self::$redisDatabase);
 		return self::$redis;
 	}
 

lib/Resque/Redis.php

@@ -39,7 +39,7 @@ class Resque_Redis extends Redisent
 		'setnx',
 		'incr',
 		'incrby',
-		'decrby',
+		'decr',
 		'decrby',
 		'rpush',
 		'lpush',

lib/Resque/Worker.php

@@ -96,7 +96,7 @@ public static function exists($workerId)
 	 */
 	public static function find($workerId)
 	{
-		if(!self::exists($workerId)) {
+	  if(!self::exists($workerId) || false === strpos($workerId, ":")) {
 			return false;
 		}
 
@@ -449,12 +449,14 @@ public function pruneDeadWorkers()
 		$workerPids = $this->workerPids();
 		$workers = self::all();
 		foreach($workers as $worker) {
-			list($host, $pid, $queues) = explode(':', (string)$worker, 3);
-			if($host != $this->hostname || in_array($pid, $workerPids) || $pid == getmypid()) {
-				continue;
-			}
-			$this->log('Pruning dead worker: ' . (string)$worker, self::LOG_VERBOSE);
-			$worker->unregisterWorker();
+		  if (is_object($worker)) {
+  			list($host, $pid, $queues) = explode(':', (string)$worker, 3);
+  			if($host != $this->hostname || in_array($pid, $workerPids) || $pid == getmypid()) {
+  				continue;
+  			}
+  			$this->log('Pruning dead worker: ' . (string)$worker, self::LOG_VERBOSE);
+  			$worker->unregisterWorker();
+		  }
 		}
 	}
 

test/Resque/Tests/bootstrap.php

@@ -21,6 +21,7 @@
 // Include Resque
 require_once RESQUE_LIB . 'Resque.php';
 require_once RESQUE_LIB . 'Resque/Worker.php';
+require_once RESQUE_LIB . 'Resque/Redis.php';
 
 // Attempt to start our own redis instance for tesitng.
 exec('which redis-server', $output, $returnVar);