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Comprehensive software architecture and system design guide covering design patterns, distributed systems, scalability, microservices, and architectural principles. Use when designing systems, solving architecture problems, or learning design patterns.
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| name | architecture-guide |
| description | Comprehensive software architecture and system design guide covering design patterns, distributed systems, scalability, microservices, and architectural principles. Use when designing systems, solving architecture problems, or learning design patterns. |
| sasmp_version | 1.3.0 |
| bonded_agent | 06-architecture-specialist |
| bond_type | PRIMARY_BOND |
| eqhm_enabled | true |
Master software architecture, system design, and building scalable distributed systems.
┌─────────────────────────────────────┐
│ Application Layer │
├─────────────────────────────────────┤
│ Authentication │ API │ Business │
├─────────────────────────────────────┤
│ Database Layer │
└─────────────────────────────────────┘
┌──────────────┐ ┌──────────────┐ ┌──────────────┐
│ Auth Service │ │ Order Service │ │ User Service │
└──────────────┘ └──────────────┘ └──────────────┘
│ │ │
└────────────────┴──────────────────┘
│
┌───────────────────┐
│ API Gateway │
└───────────────────┘
│
┌───┴───┐
│Client │
└───────┘
// Singleton Pattern
class Database {
static instance = null;
static getInstance() {
if (!Database.instance) {
Database.instance = new Database();
}
return Database.instance;
}
}
// Factory Pattern
class UserFactory {
createUser(type) {
if (type === 'admin') return new AdminUser();
if (type === 'regular') return new RegularUser();
}
}
// Builder Pattern
class UserBuilder {
constructor(name) {
this.name = name;
}
setEmail(email) {
this.email = email;
return this;
}
setRole(role) {
this.role = role;
return ;
}
() {
();
}
}
// Adapter Pattern
class OldAPI {
getData() { return { data: [] }; }
}
class APIAdapter {
constructor(oldAPI) {
this.oldAPI = oldAPI;
}
getAPIv2Format() {
return { response: this.oldAPI.getData() };
}
}
// Decorator Pattern
class Coffee {
cost() { return 5; }
}
class MilkDecorator {
constructor(coffee) {
this.coffee = coffee;
}
cost() { return this.coffee.cost() + 2; }
}
// Observer Pattern
class EventEmitter {
constructor() {
this.listeners = {};
}
on(event, callback) {
this.listeners[event] = this.listeners[event] || [];
this.listeners[event].push(callback);
}
emit(event, data) {
if (this.listeners[event]) {
this.listeners[event].forEach(cb => cb(data));
}
}
}
// Strategy Pattern
class PaymentProcessor {
constructor(strategy) {
this.strategy = strategy;
}
process(amount) {
return this.strategy.process(amount);
}
}
class CreditCardStrategy {
process(amount) { return `Processing credit card: $${amount}`; }
}
class PayPalStrategy {
() { ; }
}
┌─────────────────────┐
│ Presentation Layer │
├─────────────────────┤
│ Business Logic │
├─────────────────────┤
│ Persistence Layer │
├─────────────────────┤
│ Database │
└─────────────────────┘
┌──────────────────┐
│ Event Producer │
└────────┬─────────┘
│ (Message Broker)
┌───┴────┬────────┐
┌────▼────┐ ┌▼─────┐ ┌▼──────┐
│Consumer1│ │Cons2 │ │Cons3 │
└─────────┘ └──────┘ └───────┘
Vertical Scaling: Horizontal Scaling:
┌──────────┐ ┌──────────┐
│Server │ │Server 1 │
│16GB RAM │ │4GB RAM │
│4 CPUs │ ──────> ├──────────┤
└──────────┘ │Server 2 │
│4GB RAM │
├──────────┤
│Server 3 │
│4GB RAM │
└──────────┘
Application -> L1 Cache (In-memory)
-> L2 Cache (Redis)
-> L3 Cache (CDN)
-> Database
Choose 2 of 3:
GET /api/users # List
GET /api/users/:id # Read
POST /api/users # Create
PUT /api/users/:id # Update
DELETE /api/users/:id # Delete
query {
user(id: 1) {
name
email
posts {
title
content
}
}
}
# ADR 001: Use PostgreSQL for main database
## Context
We need a relational database for our data model.
## Decision
We will use PostgreSQL instead of MySQL.
## Consequences
- Excellent JSON support
- Better concurrency handling
- Steeper learning curve than MySQL
┌──────────────────────────┐
│ Firewall │
├──────────────────────────┤
│ API Gateway / WAF │
├──────────────────────────┤
│ Application Security │
├──────────────────────────┤
│ Database Encryption │
├──────────────────────────┤
│ Physical Security │
└──────────────────────────┘
Roadmap.sh Reference: https://roadmap.sh/system-design
Status: ✅ Production Ready | SASMP: v1.3.0 | Bonded Agent: 06-architecture-specialist
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