QueueCast

QueueCast connects your game to Amazon Simple Queue Service (SQS) and Amazon Simple Notification Service (SNS) without a separate backend SDK or web layer. Send bug reports, telemetry, match results and jobs to queues your backend processes, listen to a queue for server events, publish notifications and keep your players' devices registered for push.

Send Message puts a message into a queue with string attributes, an optional delay and FIFO group and deduplication ids. Send Message Batch sends any number of messages, ten per request, and reports the result of every entry. Receive Messages long-polls a queue and returns messages with their receipt handle, attributes, receive count and sent time. Delete Message, Delete Message Batch and Change Message Visibility finish or postpone the work, Get Queue Url turns names into URLs and caches them, and Get Queue Attributes reports approximate message counts and queue settings.

Listen To Queue keeps long-polling a queue in the background until you stop it and fires On Message on the game thread for every message. It can delete each message after your event ran, retries network errors with a growing pause, stops on errors that need your attention and stops by itself when its world is torn down.

SNS Publish sends a notification to a topic, to a single device through its platform endpoint, or to a phone number as SMS, with message attributes for subscription filters, FIFO topics and per-protocol JSON messages. Register Push Device turns a Firebase Cloud Messaging or APNs token into an SNS platform endpoint and keeps it valid: an existing endpoint is reused, a deleted one is created again and a changed token or a disabled endpoint is updated. Subscribe, Unsubscribe and Set Push Endpoint Enabled manage topic subscriptions and notification opt-outs, and Unwrap SNS Notification reads topic messages that arrive in a queue.

Players get credentials from an Amazon Cognito identity pool: as guests, or signed in with a token from a Cognito user pool, Google, Apple, Facebook or any OpenID provider through Set Login Token. Static keys and the default AWS credential chain are available for development, dedicated servers and tools. Requests run on background worker threads with automatic retries, so the game thread never blocks, and every result arrives back on the game thread. The documentation includes a least-privilege IAM policy for the identity pool role.

QueueCast is part of the Alpha XP AWS collection for Unreal Engine 4.27 and 5.8. It includes the AWS SDK for C++ prebuilt for Win64, Linux and Android and ships with styled HTML documentation.

Key features

• Send Message: string attributes, delay, FIFO message group and deduplication ids
• Send Message Batch: any number of messages, 10 per request, per-entry success or failure
• Receive Messages: long polling, visibility timeout, attributes, receive count, sent time
• Listen To Queue: continuous long polling with On Message events, auto-delete,
• Delete Message, Delete Message Batch, Change Message Visibility
• Get Queue Url (cached per name, or built from a URL prefix) and Get Queue Attributes
• SNS Publish to topics, platform endpoints (one device) and phone numbers (SMS), with
• Register Push Device: Firebase Cloud Messaging / APNs tokens to SNS endpoints, reused,
• Subscribe, Unsubscribe and Set Push Endpoint Enabled
• Unwrap SNS Notification for topic messages delivered to queues
• Amazon Cognito identity pools for guest and signed-in players (Set Login Token for any
• Static keys (development and servers) and the default AWS credential chain
• Background worker threads, automatic retries with back-off, timeouts, custom endpoints
• Cancellable latent nodes; all results delivered on the game thread
• C++ API with native callbacks

Blueprint & C++ API

Every call is reachable from more than one place — pick the entry point that fits your project:

Callable runs when executed · Pure no exec pin, returns a value · LatentAsync finishes later and fires its outputs

QueueCast 2

SQS 1

Config 3

Identity 5

SNS 1

Events & delegates

Bind these in Blueprint (drag off the object → Bind Event) or with AddDynamic in C++.

Project settings

Configure once under Project Settings › Plugins › QueueCast — values are saved to the project's config .ini, so they travel with the project and your build.

Options & enums

Compatibility

One ready-made build per engine version is included in the download — copy the one that matches your project.

Technical details

What's in the download

Quick start

1. Unzip the download and pick the build that matches your engine (4.27 · 5.8).
2. Copy the QueueCast folder into your project's Plugins/ folder (create it if needed).
3. Open the project, enable QueueCast under Edit › Plugins and restart the editor.
4. Fill in Project Settings › Plugins › QueueCast.
5. Right-click in any Blueprint graph and search QueueCast — or include the public headers from C++.
6. Package for your target platform (Windows, Linux, Android).

Good to know