Not able to consume messages from Jetstream, fetchAll(10) always return empty array

[SuheylZ]

Objective i want to read items from jetstream and process them one by one using my handler.

Solution

• Php 8,3
• Php Script is a Laravel command app:mycommand
• XDebug
• php artisan app:mycommand

Somewhere in my app i have this

 $this->client->subscribe("mystream", "mysubject", function (array|null $headers, mixed $body, string $subject){
            echo $body;
            return true;
        });

and this is the detail of the subscriber function.

 public function subscribe(string $name, string $subject, callable $listener): void
    {
        $stream = $this->client->getApi()->getStream($name);

        $consumer = $stream->getConsumer("myConsumer");
        $consumer->getConfiguration()->setSubjectFilter($name.$subject);
        if(!$consumer->exists()) {
            $cosumer->create();
        }

        $queue = $consumer->getQueue();
        while (true) {
            try {
                $msgs = $queue->fetchAll(10);
                foreach ($msgs as $msg) {
                    if ($msg !== null) {
                        $headers = $msg->payload->headers ?? array();
                        $body = $msg->payload->body;
                        $subject = $msg->subject;
                        $ret = $listener($headers, $body, $subject);
                        if ($ret) {
                            $msg->ack();
                        }
                    }
                }
            } catch (\Exception $e) {
                echo $e->getMessage();
            }
        }
    } 

on NATS i have been able to publish messaages. this is what i get from nats-cli from mystream.mysubject

bbdfca7cb16a:~# nats stream view [server] ? Select a Stream mystream [1] Subject: mysubject Received: 2024-06-30T16:05:56Z hello world

[2] Subject: mysubject Received: 2024-06-30T16:20:25Z hello world

[3] Subject: mysubject Received: 2024-06-30T19:09:33Z How are you

[4] Subject: mysubject Received: 2024-06-30T19:13:26Z How are you

[5] Subject: mysubject Received: 2024-06-30T19:13:30Z Are you there

but fetchall(10) always return an empty array. Also note that I'm running it thru a php script. What is my mistake in setting up the consumer?