function workQueue( $jobs = 10, $attemptsPerJob = 3 ){
    //Get a properly configured queue
    $queue = wp_queue();
    //Get the worker for the queue
    $worker = $queue->worker($attemptsPerJob);

    //Loop through jobs in queue until we've done the number passed in $jobs
    // or no jobs left to run
    $totalJobs = 0;
    while( $worker->process() && $jobs <= $totalJobs ){
        $totalJobs++;
    }
    //Work the queue and
    return rest_ensure_response( [ 'totalJobs' => $totalJobs ] );

}

add_action( 'rest_api_init', function(){
    register_rest_route( 'hi-roy', 'queue/run', [
        'methods' => ['POST', 'GET' ],
        'callback' => 'workQueue'
    ]);
});