Streaming, as you like it

Different teams, different tools, different preferences. When it comes to streaming, convenience means something unique to everyone:

• Your frontend team thrives with WebSockets or HTTP 2 resource streams.
• Your backend team prefers the structure and efficiency of gRPC.
• Your infrastructure team everything centralised in Kafka.
• Your data team finds power in Flink for processing streams.
• Your hardware team relies on WebRTC for seamless device communication.
• And sometimes, integrations demand the simplicity of HTTP Webhooks.

But it’s not just about your teams. Your customers may also have specific preferences. Some may rely on Kafka for large-scale streaming, while others find WebSockets the most intuitive.

RapidRecast channels bridge all these diverse needs, enabling every protocol to communicate seamlessly with another. It ensures unmatched interoperability and flexibility across your systems while allowing you to conveniently offer streams in the formats your customers prefer.

Whether you're unifying teams, integrating products, or empowering customers, RapidRecast makes it effortless.

Server and Client Capabilities

When you make a request, you’re initiating an action — pushing data or triggering a response. But as the one handling those requests, isn’t it frustrating to keep a live connection open just to receive inbound messages?

Traditional streaming APIs tie you to this model, forcing you to constantly manage live connections or repeatedly initialize requests by connecting to the service. It’s cumbersome and limits your flexibility.

With RapidRecast, we break free from those constraints. You can stay true to the simplicity of the request-response model while managing live connections only when necessary. Whether your services act as clients or servers, RapidRecast adapts seamlessly, filling the role of either side of the operation.

The result? You’re empowered to build and connect your software the way you want — with unmatched convenience and control.

Synchronous or Asynchronous

Synchronous requests are straightforward: you send a request and get a response quickly. It’s simple, intuitive, and easy to work with.

But what happens when a request takes too long to process? If the server is tied up handling it, resources can quickly become bottlenecks. To manage high volumes of traffic, engineers have turned to asynchronous communication, which allows requests to be processed independently.

However, asynchronous communication isn’t without its challenges:

• You need to track requests and responses, ensuring everything aligns.
• You must balance traffic and maintain the correct order of related requests.
• You’re responsible for delivery guarantees, preventing clients from waiting indefinitely for a response.

With RapidRecast, you don’t have to choose one over the other. Whether synchronous or asynchronous communication works best for your scenario, RapidRecast seamlessly integrates the two. Now, you can focus on building your system while letting us handle the complexities.

Scalability

Most existing streaming systems expect you to manage intricate settings like partitions, regions, and replication levels. They assume you not only understand these controls but can configure them perfectly to ensure optimal replication, region affinity, and partitioning for your workloads.

But isn’t this approach counterintuitive? At its core, streaming has a universal goal: messages that depend on each other should follow the same path and arrive at the same destination.

RapidRecast takes this principle to its logical conclusion. Instead of burdening you with low-level configuration, you simply define your high-level requirements — like the degree of replication needed. From there, RapidRecast intelligently manages the rest, including partitioning, region distribution, and load balancing.

Beyond these optimizations, RapidRecast is cluster-aware, dynamically routing traffic to the appropriate nodes and handling potential redirections seamlessly. This ensures your workloads are consumed efficiently, even in complex distributed environments. Whether it's balancing traffic across clusters or redirecting requests for optimized processing, RapidRecast adapts to your infrastructure in real-time.

By leveraging advancements in data systems research, RapidRecast adopts an opinionated approach to ensure your workloads are handled with precision and efficiency. The result? A seamless, reliable streaming experience where the complexity is invisible, and the results speak for themselves.

Request Batching

Clients often send simple, unbatched requests. While manageable individually, a surge of such requests can quickly create a backlog, straining your system until it scales out. This not only delays responses but also drives up operational costs as you add more replicas to handle the load.

By batching similar requests, you can process them in bulk, dramatically improving system throughput without the need for additional infrastructure. RapidRecast makes this effortless by allowing you to assign requests to specific channels and consume responses directly from them.

All you need to do is configure how to group requests — whether by payload fields, metadata, or other criteria — and RapidRecast takes care of the rest. With intelligent request batching, your systems run more efficiently, saving time and reducing costs.

Rust all the way

Rust is a systems programming language renowned for its exceptional performance and unparalleled safety guarantees. Its innovative design enables developers to write fast, reliable software without compromising on security or correctness.

One of Rust’s standout features is "fearless concurrency" — a result of its strict language constraints that prevent common pitfalls in concurrent programming. These constraints ensure safe access to shared data, significantly reducing the risk of bugs in multi-threaded applications.

Rust’s memory model further simplifies reasoning about memory allocations. By making ownership and borrowing explicit, developers gain clear insights into how memory is managed, enabling smarter and more efficient usage.

RapidRecast is built entirely with Rust, leveraging its powerful features to deliver a system that is not only extremely performant but also highly reliable.

Near-zero Integration

Isn’t it frustrating when adopting a new system means wrangling with an unfamiliar SDK? That’s why RapidRecast eliminates the need for custom protocols or SDKs. Instead, it lets you leverage the tools and code you already use. Whether it’s your frontend, backend, infrastructure, or customer-facing applications, you’ll hardly need to make any changes to start interacting with RapidRecast.

At the heart of this simplicity is RecastLang — a powerful and versatile language that drives RapidRecast. It’s designed for flexibility, with support for multiple representations, including JSON, YAML, TOML, XML, Lua, and of course, RecastLang itself. This makes it incredibly easy to integrate into virtually any tool or workflow you can imagine.

To make things even smoother, RapidRecast comes with extensive documentation and samples, enabling you to generate reliable, production-ready code with Large Language Models (LLMs). RapidRecast ensures integration is simple, intuitive, and efficient — no headaches required.

Stability

At RapidRecast, stability isn’t an afterthought — it’s a core feature. We adopt the same rigorous methodologies trusted by database providers to ensure the system remains reliable and behaves predictably, even under heavy workloads.

To uphold data correctness guarantees, we run Jepsen tests on the live product, ensuring that consistency and reliability are never compromised.

Our code is designed in a sans-IO architecture, meaning it operates independently of the network or storage during testing. By abstracting these components, we’re able to:

• Perform high-frequency fuzzing and high-cardinality tests, pushing the system far beyond typical conditions.
• Enable deterministic testing, allowing us to identify and fix unexpected errors before they ever reach you.

With RapidRecast, you can trust in a system that is meticulously tested, robust, and built to perform flawlessly in every scenario.