Client-side deadline interceptor for thesis/grpc. It gives every outgoing call a deadline and applies it in two places so the client and server agree on it:

• the grpc-timeout header, which the server enforces (cancelling the RPC and returning DEADLINE_EXCEEDED);
• a local TimeoutCancellation, so the client gives up on its own even if the server never responds (a plain client deadline otherwise never reaches the server — the transport does not set grpc-timeout by itself).

• Installation
• Usage

composer require thesis/grpc-deadline

Register the interceptor on the client's unary and stream chains. A default deadline covers every call:

use Thesis\Grpc\Client;
use Thesis\Grpc\Deadline;
use Thesis\Grpc\Metadata\Timeout;

$deadline = new Deadline\ClientInterceptor(Timeout::seconds(30));

$client = new Client\Builder()
    ->withUnaryInterceptors($deadline)
    ->withStreamInterceptors($deadline)
    ->build();

Override it per call by attaching a Timeout to the call's metadata — the call's own deadline wins over the default:

use Thesis\Grpc\Metadata;
use Thesis\Grpc\Metadata\Timeout;

$client->invoke($request, $invoke, new Metadata()->withKey(Timeout::milliseconds(200)));

Constructed with no default (new Deadline\ClientInterceptor()), the interceptor only acts on calls that carry their own grpc-timeout, and leaves the rest untouched.