Fixed topic gc bug

src/Broker/TopicManager.php

@@ -69,7 +69,7 @@ class TopicManager
             $this->topics,
             function (Topic $topic) {
                 $topic->garbageCollect();
-                return ($topic->getHistorySize() > 0 && $topic->getSubscriberCount() > 0) || ($topic->getAge() < 60);
+                return ($topic->getHistorySize() > 0 || $topic->getSubscriberCount() > 0) || ($topic->getAge() < 60);
             }
         );
     }

src/Http/Middleware/ResponseMiddleware.php

@@ -55,6 +55,7 @@ class ResponseMiddleware
                 if ($t instanceof SecurityException) {
                     return Response::plaintext("Access Denied")->withStatus(Response::STATUS_UNAUTHORIZED);
                 }
+                $this->logger->warning(get_class($t).": ".$t->getMessage(), [ 'file'=>$t->getFile(), 'line'=>$t->getLine() ]);
                 return Response::plaintext("500: Internal Server Error (".$t->getMessage().")\n")->withStatus(500);
             }
         )->then(

src/Http/Server.php

@@ -54,6 +54,9 @@ class Server
         $this->logger = $this->createLogger();
 
         $this->topicManager = new TopicManager();
+        $this->loop->addPeriodicTimer(30, function () {
+            $this->topicManager->garbageCollect();
+        });
         
         $this->webSocketClients = new SplObjectStorage();