fix connection

lib/Alchemy/Phrasea/WorkerManager/Command/WorkerExecuteCommand.php

@@ -45,6 +45,12 @@ class WorkerExecuteCommand extends Command
         /** @var AMQPChannel $channel */
         $channel = $serverConnection->getChannel();
 
+        if ($channel == null) {
+            $output->writeln("Can't connect to rabbit, check configuration!");
+
+            return;
+        }
+
         /** @var WorkerInvoker $workerInvoker */
         $workerInvoker = $this->container['alchemy_worker.worker_invoker'];
 

lib/Alchemy/Phrasea/WorkerManager/Queue/AMQPConnection.php

@@ -80,12 +80,18 @@ class AMQPConnection
     public function getConnection()
     {
         if (!isset($this->connection)) {
-            $this->connection =  new AMQPStreamConnection(
+            try{
-                $this->hostConfig['host'],
+                $this->connection =  new AMQPStreamConnection(
-                $this->hostConfig['port'],
+                    $this->hostConfig['host'],
-                $this->hostConfig['user'],
+                    $this->hostConfig['port'],
-                $this->hostConfig['password'],
+                    $this->hostConfig['user'],
-                $this->hostConfig['vhost']);
+                    $this->hostConfig['password'],
+                    $this->hostConfig['vhost']
+                );
+
+            } catch (\Exception $e) {
+
+            }
         }
 
         return $this->connection;
@@ -94,26 +100,40 @@ class AMQPConnection
     public function getChannel()
     {
         if (!isset($this->channel)) {
-            $this->channel = $this->getConnection()->channel();
+            $this->getConnection();
-        }
+            if (isset($this->connection)) {
+                $this->channel = $this->connection->channel();
 
-        return $this->channel;
+                return $this->channel;
+            }
+
+            return null;
+        } else {
+            return $this->channel;
+        }
     }
 
     public function declareExchange()
     {
-        $this->channel->exchange_declare(self::ALCHEMY_EXCHANGE, 'direct', false, true, false);
+        if (!isset($this->channel)) {
-        $this->channel->exchange_declare(self::RETRY_ALCHEMY_EXCHANGE, 'direct', false, true, false);
+            $this->channel->exchange_declare(self::ALCHEMY_EXCHANGE, 'direct', false, true, false);
+            $this->channel->exchange_declare(self::RETRY_ALCHEMY_EXCHANGE, 'direct', false, true, false);
+        }
     }
 
     /**
      * @param $queueName
-     * @return AMQPChannel
+     * @return AMQPChannel|null
      */
     public function setQueue($queueName)
     {
         if (!isset($this->channel)) {
             $this->getChannel();
+            if (!isset($this->channel)) {
+                // can't connect to rabbit
+                return null;
+            }
+
             $this->declareExchange();
         }
 

lib/Alchemy/Phrasea/WorkerManager/Queue/MessageHandler.php

@@ -25,6 +25,12 @@ class MessageHandler
 
         $channel = $serverConnection->getChannel();
 
+        if ($channel == null) {
+            $this->messagePublisher->pushLog("Can't connect to rabbit, check configuration!", "error");
+
+            return ;
+        }
+
         // define consume callbacks
         $callback = function (AMQPMessage $message) use ($channel, $workerInvoker, $publisher) {
 

lib/Alchemy/Phrasea/WorkerManager/Queue/MessagePublisher.php

@@ -96,6 +96,12 @@ class MessagePublisher
 
         $channel = $this->serverConnection->setQueue($queueName);
 
+        if ($channel == null) {
+            $this->pushLog("Can't connect to rabbit, check configuration!", "error");
+
+            return true;
+        }
+
         $exchange = in_array($queueName, AMQPConnection::$defaultQueues) ? AMQPConnection::ALCHEMY_EXCHANGE : AMQPConnection::RETRY_ALCHEMY_EXCHANGE;
         $channel->basic_publish($msg, $exchange, $queueName);
 
@@ -137,6 +143,12 @@ class MessagePublisher
         $msg->set('application_headers', $headers);
 
         $channel = $this->serverConnection->setQueue($queueName);
+        if ($channel == null) {
+            $this->pushLog("Can't connect to rabbit, check configuration!", "error");
+
+            return ;
+        }
+
         $channel->basic_publish($msg, AMQPConnection::RETRY_ALCHEMY_EXCHANGE, $queueName);
     }
 }