Modules#

Join is organized into five specialized modules, each addressing specific needs in building high-performance networked applications.

This modular organization provides:

  • clear separation of concerns
  • easy navigation through the codebase
  • logical grouping of related functionality

🏗️ Core Module#

Foundation components and runtime primitives

The core module provides essential building blocks including the epoll-based reactor, socket abstractions (TCP, UDP, TLS, Unix), threading primitives, lock-free queues, timers, and utilities.

Key Components:

  • Reactor pattern with epoll
  • TCP/UDP/TLS sockets
  • Thread pools and synchronization
  • Lock-free shared memory queues
  • High-precision timers

👉 See: Core Module

🌐 Fabric Module#

Network control and Linux fabric management

The fabric module provides network interface management, ARP protocol implementation, and DNS resolution for controlling and monitoring the Linux network stack.

Key Components:

  • Netlink-based interface manager
  • ARP client implementation
  • DNS resolver

👉 See: Fabric Module

🔐 Crypto Module#

Security and cryptographic operations

The crypto module offers cryptographic functions built on OpenSSL, including hashing, HMAC, digital signatures, and encoding utilities.

Key Components:

  • Hash functions (MD5, SHA-1/224/256/384/512)
  • HMAC with stream support
  • Digital signatures (RSA, DSA, ECDSA, EdDSA)
  • Base64 encoding/decoding

👉 See: Crypto Module

📊 Data Module#

High-performance serialization

The data module provides fast JSON and MessagePack parsers with both DOM and SAX-style interfaces, plus compression support.

Key Components:

  • High-performance JSON parser (DOM/SAX)
  • MessagePack binary format
  • Zlib compression streams
  • Dynamic value containers

👉 See: Data Module

🚀 Services Module#

Application protocols

The services module implements common application-layer protocols including HTTP/HTTPS client and server, SMTP/SMTPS client, and chunked transfer encoding.

Key Components:

  • HTTP/1.1 client and server
  • SMTP/SMTPS email client
  • Chunked transfer encoding
  • Mail message construction

👉 See: Services Module

Internal Structure#

The framework code is internally organized with dependencies between modules:

 ├─ Core (foundation)
 ├─ Crypto
 ├─ Fabric
 ├─ Data
 └─ Services

Next Steps#

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