This document discusses worker processes and job queues. It introduces the concepts of a worker, which is a background process that waits for tasks from a user, and a job queue, which manages and distributes tasks to workers. It provides pseudocode examples of using a command pattern to serialize tasks into jobs that are put on a queue to be processed asynchronously by worker processes. The document recommends using process control and asynchronous processing to avoid latency issues from long-running tasks.

1. Introdução a
Worker ⚙

2. sergiors.com
github.com/sergiors

3. Dúvidas?
@serg1ors #scdevsummit

4. Fatal error: Allowed memory
size of …

5. Worker ⚙⁉

6. Um processo que fica
rodando, esperando por
tarefas do "usuário".

7. Seus workers, seus processos.
É necessário ter o controle
do servidor.

8. Worker Message Queue
!=

9. Job
Message
Queue
Worker
Qualquer tarefa (trabalho) que
deseja fazer
Responsável por gerenciar suas
tarefas. Ex: Beanstalkd, RabbitMQ,
Gearman
Executa (consome) as tarefas

10. Job Message Queue Worker

11. Processes que podem
causar latência;

12. Jobs diferentes,
Workers diferentes⁉

13. Command Pattern

14. pseudocode
interface CommandInterface
{
execute()
}

15. pseudocode
class Invoker
{
setCommand(CommandInterface $command)
run()
}

16. pseudocode
$user = new User(10);
$tweet = new TweetCommand(
'#beer depois do #tdc?'
$user
);
$pheanstalk->put(serialize($tweet));

17. pseudocode
while ($job = $queue->reserve()) {
$command = unserialize($job->getData());
try {
if ($command instanceof CommandInterface) {
$invoker->setCommand($command);
$invoker->run();
$queue->delete($job);
}
} catch (Exception $e) {
}
}
php7 👏

18. monolog
#protip

19. Serializer

20. max_execution_time: The default setting is
30. When running PHP from the command
line the default setting is 0.

21. set_time_limit(0);
😤😤😤

22. • posix
• pcntl
• pthreads
Process Control

23. Asynchronous
👊👊👊

24. Obrigado!
🍺🍻