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Architecture

High-level overview

  • GitHub for source code hosting, project management and CI.

  • Nix for managing development environment.

  • React + TypeScript for UI.

  • Scala 3 for the server.

  • Protobuf and gRPC-Web for communication between UI and server.

    In order to transform HTTP requests to Protobuf and vice-versa, we use Envoy proxy. Maybe someday we'll can get rid of it.

  • AWS EKS Kubernetes clusters for test Pulsar deployments.

  • AWS EC2 instances for manual testing on Windows, Linux and MacOS.

API Communication

sequenceDiagram
  autonumber

  UI->>Envoy proxy : HTTP request
  rect rgb(255, 255, 127)

  note right of Envoy proxy : Dekaf server <br />internal communication

  Envoy proxy ->>HTTP server: HTTP request
  HTTP server-->>Envoy proxy : HTTP response

  Envoy proxy->>gRPC server: gRPC request
  gRPC server-->>Envoy proxy : gRPC response
  end

  Envoy proxy-->>UI: HTTP response

  gRPC server->>Pulsar broker: 8080 - admin API request
  Pulsar broker-->>gRPC server: 8080 - admin API response

  gRPC server->>Pulsar broker: 6650 - service request
  Pulsar broker-->>gRPC server: 6650 - service response
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