CoreSystem Architecture¶

Overview¶

CoreSystem is a modular ecosystem of .NET libraries designed to simplify the development of modern applications.

Each package has a single responsibility and integrates seamlessly with the rest of the ecosystem through dependency injection, abstractions, and shared design principles.

The primary goals of CoreSystem are:

Modularity
Performance
Extensibility
Observability
Maintainability
Consistent developer experience

Design Principles¶

CoreSystem follows a consistent set of architectural principles across all packages.

Single Responsibility¶

Each package focuses on solving a specific problem.

Examples:

CoreSystem.Cache provides distributed caching.
CoreSystem.Resilience provides resilience pipelines.
CoreSystem.Http provides reusable HTTP infrastructure.
CoreSystem.Serialization provides serialization services.
CoreSystem.Observability provides application observability.

Modular Architecture¶

Packages are designed to be consumed independently whenever possible.

Applications only install the packages they require.

Dependency Injection First¶

Every package integrates naturally with the Microsoft dependency injection ecosystem.

builder.Services.AddCoreCache();

builder.Services.AddCoreResilience();

builder.Services.AddCoreObservability();

Extensibility¶

CoreSystem exposes public abstractions that allow applications to customize behavior without modifying the framework.

Extension points are implemented through contracts and dependency injection.

Optional Components¶

CoreSystem is intentionally modular.

Not every application requires every package.

For example:

An application may use CoreSystem.Cache without CoreSystem.Observability.
An application may use CoreSystem.Http independently.
An application may only require CoreSystem.Resilience.

Applications decide which packages to include based on their requirements.

Ecosystem Overview¶

                           Applications
                                  │
        ┌─────────────────────────┼─────────────────────────┐
        │                         │                         │
        ▼                         ▼                         ▼
   CoreSystem.Cache              CoreSystem.Idempotency         CoreSystem.Resilience
        │                         │                         │
        │                         │                         │
        ├──────────────┐          │                         │
        ▼              ▼          ▼                         ▼
   CoreSystem.Memory     CoreSystem.Http  CoreSystem.Serialization

────────────────────────────────────────────────────────────

                    Shared Contracts

          CoreSystem.Observability.Abstractions

────────────────────────────────────────────────────────────

                  Optional Infrastructure

                 CoreSystem.Observability

The diagram illustrates the logical organization of the CoreSystem ecosystem.

Packages collaborate through abstractions while remaining loosely coupled.

Applications decide which optional packages should be registered.

Shared Contracts¶

Some capabilities are shared through abstraction packages.

CoreSystem.Observability.Abstractions¶

This package defines the contracts used by the observability infrastructure.

Examples include:

Observability contributors
Health check contributors

The package contains interfaces only and does not provide runtime implementations.

Optional Infrastructure¶

CoreSystem.Observability¶

CoreSystem.Observability provides a complete implementation for application observability.

Features include:

OpenTelemetry integration
Metrics
Distributed tracing
Health check registration
Automatic discovery of observability contributors

CoreSystem.Observability is part of the CoreSystem ecosystem, but its use is optional.

Applications decide whether to register the package based on their monitoring requirements.

This approach keeps the remaining packages lightweight while still providing a rich observability experience when needed.

Package Responsibilities¶

CoreSystem.Cache¶

Responsibilities:

Distributed caching
Cache-aside pattern
HTTP response caching
Cache invalidation
Health checks
Extensibility

CoreSystem.Resilience¶

Responsibilities:

Retry
Timeout
Circuit breaker
Resilience pipelines

CoreSystem.Http¶

Responsibilities:

Shared HTTP infrastructure
Response capture
Response writing
HTTP utilities

CoreSystem.Idempotency¶

Responsibilities:

Request fingerprinting
Response replay
Idempotency storage

CoreSystem.Memory¶

Responsibilities:

In-memory synchronization
Keyed asynchronous locks

CoreSystem.Redis¶

Responsibilities:

Redis integration
Distributed cache support

CoreSystem.Serialization¶

Responsibilities:

Serialization abstractions
JSON serialization
Serializer implementations

CoreSystem.Observability¶

Responsibilities:

Metrics
Tracing
OpenTelemetry integration
Health check registration
Observability bootstrap

Architecture Layers¶

CoreSystem can be viewed as a layered architecture.

Applications
      │
      ▼
Feature Packages
(Cache, Idempotency)

      │
      ▼
Infrastructure Packages
(Http, Resilience)

      │
      ▼
Foundation Packages
(Memory, Redis, Serialization)

      │
      ▼
Shared Contracts
(CoreSystem.Observability.Abstractions)

      │
      ▼
Optional Infrastructure
(CoreSystem.Observability)

These layers describe the conceptual organization of the ecosystem rather than strict project references.

Architecture Goals¶

CoreSystem is designed to provide:

Modular architecture
Clean separation of concerns
Minimal dependencies
High performance
Low memory allocations
Native AOT compatibility
OpenTelemetry support
Easy extensibility
Production-ready infrastructure
Consistent developer experience

Next Steps¶

After understanding the overall architecture, continue with the documentation for each package.

CoreSystem.Cache
CoreSystem.Resilience
CoreSystem.Http
CoreSystem.Idempotency
CoreSystem.Memory
CoreSystem.Redis
CoreSystem.Serialization
CoreSystem.Observability