networknt/light-4j
Light 4j
light-4j is a Java microservices framework designed for building scalable distributed systems. It provides a toolkit for developing cloud-native services with integrated support for service discovery, telemetry, and secure inter-service communication.
The project includes a runtime OpenAPI request validator to ensure communication consistency by checking data against formal specifications. It also features an OAuth2 API security gateway for verifying identity tokens and managing credentials, alongside an event-sourcing messaging system for building command query responsibility segregation architectures.
The framework covers several broader capability areas, including traffic management via rate limiting and ingress proxying, observability through request context propagation and telemetry collection, and data persistence using connection-pooled relational database access. It also provides automation tools for generating project boilerplates, service code, and test stubs from specifications.
Deployment is streamlined through integrated containerization automation and Docker deployment configurations.
Features
- Cloud Native Application Development - Provides a comprehensive framework for building scalable Java microservices with integrated service discovery and orchestration.
- Cloud-Native Microservices - Implements cloud-native deployment patterns for containerized microservices using Docker.
- Service Discovery - Dynamically locates service instances via registries to enable elastic scaling and load balancing.
- Registry-Based Service Discovery - Locates service instances using a registry or direct addressing to enable dynamic scaling and load balancing.
- Proxy Traffic Management - Proxies incoming requests with integrated schema validation and identity verification.
- Request Token Validators - Verifies OAuth2 identity tokens during the request lifecycle to enforce access control.
- API Gateway Security - Implements a centralized security layer that verifies OAuth2 identity tokens and manages credentials at the gateway level.
- API Security Management - Provides a security gateway that verifies identity tokens and manages credentials to control access to protected resources.
- Service Credential Retrievers - Manages authorization tokens and credential scopes for secure communication between distributed services.
- Token-Based Identity Verifications - Secures distributed microservices by verifying OAuth2 identity tokens and managing security scopes.
- Event Driven Messaging - Provides a messaging system that implements event sourcing and CQRS to decouple microservice communication.
- Event Logs - Implements CQRS by storing state changes in a distributed append-only event log for event-driven architectures.
- Event Sourcing - Provides a distributed log implementation for building event-driven services and CQRS architectures.
- Event Sourcing - Implements an immutable event log to persist application state changes for CQRS and event-driven architectures.
- Microservices Frameworks - Provides a comprehensive toolkit for developing and coordinating independent services within a distributed Java architecture.
- Runtime Specification Validation - Checks live API traffic against formal OpenAPI specifications during execution to ensure communication consistency.
- Service Discovery Management - Coordinates service metadata and registry configurations to perform client-side load balancing.
- Runtime OpenAPI Request Validators - Validates incoming and outgoing request and response payloads against OpenAPI specifications at runtime.
- Microservices Development - Provides a dedicated framework for developing scalable Java-based microservices using distributed system patterns.
- Input Validation and Sanitization - Removes cross-site scripting threats from query parameters, headers, and request bodies to secure APIs.
- Database Connectivity - Provides connectivity tools and connection pooling for various relational database engines.
- Connection Pooling - Manages reusable database connection sets to optimize multi-threaded data access.
- Automated Containerization - Automates the generation of container files and configurations to streamline CI/CD pipelines.
- Docker Deployments - Generates Docker and DevOps configurations for consistent environment isolation and deployment.
- Rate Limiters - Protects internet-facing interfaces using rate limiting and CORS handling to prevent abuse.
- Service Traffic Routing - Routes external traffic to internal services using service discovery and security certificates.
- Ingress-Based Routing - Routes incoming traffic through a gateway that applies schema validation and identity verification.
- Tracing Context Propagation - Passes correlation IDs and custom headers across service boundaries to maintain consistent distributed request tracking.
- Request Rate Limiting - Controls the volume of incoming network requests to prevent system abuse and ensure availability.
- Data Masking - Hides sensitive information like credit card numbers in logs to maintain data privacy.
- TLS Certificate Configuration - Configures public and self-signed certificates to establish encrypted TLS connections between services.
- Schema Generators - Automates service construction by using modular plugins to generate data schemas and fetchers from interface definitions.
- Identity-Based Rate Limiting - Caps request volume to identity endpoints based on service identity to prevent token request abuse.
- Metric Collection - Gathers quantitative performance metrics into time-series databases for system observability and visualization.
- Telemetry Data Collection - Collects performance metrics and telemetry data into time-series databases for system observability.
- GraphQL API Implementations - Implements data-driven GraphQL APIs using generated schemas and a plugin architecture to fetch microservice information.
- GraphQL Schema Generation - Automates the generation of GraphQL schemas and scalable services through a modular plugin architecture.
- Request Context Propagation - Passes correlation IDs and custom headers across service boundaries to maintain consistent tracking of distributed requests.
- REST API Implementations - Generates RESTful service code and request validation based on OpenAPI specifications to ensure API consistency.
- Application Platforms - Lightweight framework for high-performance microservices.
- Service Frameworks - High-throughput, low-latency microservices platform for Java.
