Cache + Promise

[meandus]

Hi,

I'm trying to do async get for concurrent requests. Do you know the correct implementation for cache with Promise

/**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('auth');
        $this->store = app('cache')->store('redis'); // Laravel
        $this->handler = new Middleware($this->store, config('api-app.cache'), false);
        $this->stack = HandlerStack::create();
        $this->stack->push($this->handler);
        $this->client = new Client([
            'handler' => $this->stack,
            'base_uri' => config('api-app.url'),
            'headers' => [config('api-app.header_token') => config('api-app.token')]
        ]);
    }

/**
     * Show the application dashboard.
     *
     * @return \Illuminate\View\View
     */
    public function index()
    {
        try {

            $promises = [
                'status_api' => $this->client->getAsync('/api/v1/heartbeat/hello', ['cache_ttl' => 60, 'cache_key' => 'status_api',]),
            ];
            $responses = Promise\unwrap($promises);
            $responses = Promise\settle($promises)->wait();

            $status_api = $responses['status_api']->getBody(); **<== FAILURE**



thanks in advance,

[pecuchet]

Hello meandus,
Sorry for the very late response! You probably already figured it out by now, but the problem is that your are using unwrap and settle at the same time. Both do the same (except unwrap will stop if any of the requests fail).

So you have two possibilities, depending on your needs:

1. with unwrap:

$responses = Promise\unwrap($promises);
$status_api = $responses['status_api']->getBody();

2. or with settle (Guzzle's doc is not very precise here):

$responses = Promise\settle($promises)->wait();
$status_api = $responses['status_api']['value']->getBody();