initialize_data_required_for_the_slow_jobs();

exec('php slow_job1.php &');
exec('php slow_job2.php &');

<?php
use Ackintosh\Snidel;

$f = function ($s) {
    sleep(3);
    echo 'echo: ' . $s;
    return 'return: ' . $s;
};

$s = time();
$snidel = new Snidel();
$snidel->process($f, ['foo']);
$snidel->process($f, ['bar']);
$snidel->process($f, ['baz']);

// `Snidel::results()` returns `\Generator`
foreach ($snidel->results() as $r) {
    // string(9) "echo: foo"
    var_dump($r->getOutput());
    // string(11) "return: foo"
    var_dump($r->getReturn());
}

// If you don't need the results, let's use `Snidel::wait()` instead of `Snidel::results()`
// $snidel->wait();

echo (time() - $s) . 'sec elapsed' . PHP_EOL;
// 3sec elapsed.

new Snidel([
    'concurrency' => 3,
    // Please refer to `Logging`
    'logger' => $monolog,
    // Please refer to `Using custom queue`
    'driver' => $driver,
    // a polling duration(in seconds) of queueing
    'pollingDuration' => 1,
]);

// multiple arguments
$snidel->process($f, ['arg1', 'arg2']);

// global function
$snidel->process('myfunction');

// instance method
$snidel->process([$instance, 'method']);

$f = function ($arg) {
    return $arg;
};

$snidel->process($f, 'arg-A_tag1', 'tag1');
$snidel->process($f, 'arg-B_tag1', 'tag1');
$snidel->process($f, 'arg_tag2', 'tag2');

foreach ($snidel->results as $r) {
    // `Task::getTag()` returns the tag passed as 3rd parameter of `Snidel::process()`
    switch ($r->getTask()->getTag()) {
        case 'tag1':
            $r->getReturn(); // arg-A_tag1 | arg-B_tag1
            break;
        case 'tag2':
            $r->getReturn(); // arg_tag2
            break;
        default:
            $r->getReturn();
            break;
    }
}

// e.g. MonoLog
use Monolog\Formatter\LineFormatter;
use Monolog\Handler\StreamHandler;
use Monolog\Logger;

$monolog = new Logger('sample');
$stream = new StreamHandler('php://stdout', Logger::DEBUG);
$stream->setFormatter(new LineFormatter("%datetime% > %level_name% > %message% %context%\n"));
$monolog->pushHandler($stream);

$snidel = new Snidel(['logger' => $monolog]);
$snidel->process($f);

// 2017-03-22 13:13:43 > DEBUG > forked worker. pid: 60018 {"role":"master","pid":60017}
// 2017-03-22 13:13:43 > DEBUG > forked worker. pid: 60019 {"role":"master","pid":60017}
// 2017-03-22 13:13:43 > DEBUG > has forked. pid: 60018 {"role":"worker","pid":60018}
// 2017-03-22 13:13:43 > DEBUG > has forked. pid: 60019 {"role":"worker","pid":60019}
// 2017-03-22 13:13:44 > DEBUG > ----> started the function. {"role":"worker","pid":60018}
// 2017-03-22 13:13:44 > DEBUG > ----> started the function. {"role":"worker","pid":60019}
// ...

$snidel->process(function ($arg1, $arg2) {
    exit(1);
}, ['foo', 'bar']);
$snidel->get();

var_dump($snidel->getError());
// class Ackintosh\Snidel\Error#4244 (1) {
// ...
// }

foreach ($snidel->getError() as $pid => $e) {
    var_dump($pid, $e);
}
// int(51813)
// array(5) {
//   'status' =>  int(256)
//   'message' => string(50) "an error has occurred in child process.
//   'callable' => string(9) "*Closure*"
//   'args' =>
//     array(2) {
//       [0] => string(3) "foo"
//       [1] => string(3) "bar"
//     }
//   'return' => NULL
//   }
// }

$connection = Aws\Sqs\SqsClient::factory([
    'key'    => 'your-aws-access-key',
    'secret' => 'your-aws-secret-key',
    'region' => 'the-aws-region-you-choose'
]);
$driver = new Bernard\Driver\SqsDriver($connection);

new Snidel([
    'driver' => $driver,
]);