AWS SQS

zero can publish to and subscribe from Amazon SQS through the unified PubSub client. Messages are signed with AWS Signature V4, so there is no AWS SDK to link.

Configuration

PUBSUB_BACKEND=SQS
SQS_QUEUE_URL=https://sqs.us-east-1.amazonaws.com/123456789012/zero-queue
AWS_REGION=us-east-1
AWS_ACCESS_KEY=
AWS_SECRET_KEY=

Publish

try ctx.getPublisher().Publish("orders", "{\"id\":1}");

The subject is ignored for SQS — the queue URL is the channel.

Subscribe

pub fn onOrder(ctx: *Context, subject: []const u8, payload: []const u8) !void {
    // handle the message
}

try app.addPubSubSubscription("orders", onOrder);

zero long-polls the queue (5-second wait), dispatches each message to your hook, then deletes it on success.

Caveats

• SQS is a single queue channel; there is no topic fan-out. The queue URL is the destination for both publish and subscribe.
• SigV4 is signed per request; credentials are read from the env above.

See the zero-kv and zero-redis examples and the implementation in src/pubsub/sqs/sqs.zig.