fix doc

Author: nepster-web

docs/guide/consuming.md

@@ -70,14 +70,26 @@ $consumer->consume();
 **Consuming algorithm:**
 -------------------------------
 
-????
+```$consumer->consume();``` - base realization of consumer.
 
+If the message table does not exist, it will be created.
 
+Next, will start endless loop ```while(true)``` to get the next message from the queue.
+if there are no messages, there will be a sustained seconds pause.
 
+When the message is received, it will be processed. Job has priority over the processor.
 
+If an uncaught error occurs, it will be caught and increment first processing attempt. 
+
+After several unsuccessful attempts, the message will status `\Simple\Queue\Status::FAILURE`.
+
+If there are no handlers for the message, the message will status `\Simple\Queue\Status::UNDEFINED_HANDLER`.
+
+> Messages are processed with statuses: `\Simple\Queue\Status::NEW` and `\Simple\Queue\Status::REDELIVERED`
 
 <br>
 
+
 **Custom example for consuming:**
 -------------------------------
 

src/Consumer.php

@@ -204,6 +204,9 @@ public function consume(array $queues = []): void
         while (true) {
             if ($message = $this->fetchMessage($queues)) {
                 try {
+
+                    // TODO: set IN_PROCESS status
+
                     $this->processing($message);
                 } catch (Throwable $throwable) {
                     if ($message->getAttempts() >= $this->config->getNumberOfAttemptsBeforeFailure()) {
@@ -223,7 +226,9 @@ public function consume(array $queues = []): void
                         // maybe lucky later
                     }
                 }
+                continue;
             }
+            sleep(1);
         }
     }