---
to: generated/docs/{{name}}.md
vars:
  name: "user-docs"
  description: "Comprehensive user service documentation"
sparql:
  find_api_endpoints: "SELECT ?endpoint ?path ?method WHERE { ?endpoint a ex:APIEndpoint ; ex:path ?path ; ex:method ?method }"
  find_database_tables: "SELECT ?table ?name WHERE { ?table a ex:DatabaseTable ; ex:tableName ?name }"
  find_business_rules: "SELECT ?entity ?rule WHERE { ?entity ex:businessRules ?rule }"
freeze_policy: "checksum"
freeze_slots_dir: "generated/.ggen/freeze"
---

# {{description}}

> **Generated by ggen on {{ "now" | date(format="%Y-%m-%d %H:%M:%S") }}**

## 📋 Table of Contents

- [Overview](#overview)
- [Architecture](#architecture)
- [API Reference](#api-reference)
- [Database Schema](#database-schema)
- [Business Rules](#business-rules)
- [Deployment](#deployment)
- [Monitoring](#monitoring)
- [Security](#security)
- [Performance](#performance)
- [Testing](#testing)
- [Troubleshooting](#troubleshooting)

## 🎯 Overview

The {{name}} service is a comprehensive microservice that demonstrates all ggen features including:

- **Complete Lifecycle Management** - Automated build, test, and deployment
- **Advanced AI Integration** - Intelligent code generation and optimization
- **Full SPARQL/RDF Integration** - Semantic-driven development
- **Production-Ready Features** - Security, monitoring, and performance optimization

### Key Features

- ✅ RESTful API with comprehensive CRUD operations
- ✅ Database integration with PostgreSQL
- ✅ Input validation and error handling
- ✅ Performance monitoring and optimization
- ✅ Security hardening and vulnerability scanning
- ✅ Comprehensive testing suite
- ✅ Automated documentation generation
- ✅ CI/CD pipeline integration

## 🏗️ Architecture

### System Components

```mermaid
graph TB
    A[Client] --> B[API Gateway]
    B --> C[{{name | title}} Service]
    C --> D[Database]
    C --> E[Cache]
    C --> F[Message Queue]
    
    G[Monitoring] --> C
    H[Logging] --> C
    I[Security] --> C
```

### Technology Stack

- **Runtime**: Rust with Tokio async runtime
- **Web Framework**: Axum for HTTP handling
- **Database**: PostgreSQL with SQLx
- **Caching**: Redis for session and query caching
- **Monitoring**: Prometheus metrics and Grafana dashboards
- **Logging**: Structured logging with tracing
- **Security**: JWT authentication and RBAC authorization

### Data Flow

1. **Request Processing**: HTTP requests are received by Axum router
2. **Authentication**: JWT tokens are validated
3. **Authorization**: RBAC permissions are checked
4. **Business Logic**: Core service logic is executed
5. **Data Access**: Database operations via SQLx
6. **Response**: JSON responses are returned to client

## 🔌 API Reference

### Base URL

```
{{base_url | default: "https://api.example.com/v1"}}
```

### Authentication

All API endpoints require authentication via JWT tokens:

```bash
Authorization: Bearer <jwt_token>
```

### Common Response Format

```json
{
  "success": true,
  "data": { ... },
  "message": "Operation completed successfully",
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

### Error Response Format

```json
{
  "success": false,
  "error": "ValidationError",
  "message": "Invalid input data",
  "code": "VALIDATION_FAILED",
  "details": {
    "field": "email",
    "reason": "Invalid email format"
  },
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

### Endpoints

#### Create {{name | title}}

**POST** `/{{name}}s`

Creates a new {{name}}.

**Request Body:**
```json
{
  "name": "John Doe",
  "email": "john.doe@example.com",
  "metadata": {
    "department": "Engineering",
    "role": "Developer"
  }
}
```

**Response:**
```json
{
  "success": true,
  "data": {
    "id": "uuid",
    "name": "John Doe",
    "email": "john.doe@example.com",
    "created_at": "2024-01-01T00:00:00Z",
    "updated_at": "2024-01-01T00:00:00Z"
  },
  "message": "{{name | title}} created successfully",
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

**Status Codes:**
- `201 Created` - {{name | title}} created successfully
- `400 Bad Request` - Invalid input data
- `409 Conflict` - Email already exists
- `500 Internal Server Error` - Server error

#### Get {{name | title}}

**GET** `/{{name}}s/{id}`

Retrieves a specific {{name}} by ID.

**Path Parameters:**
- `id` (string, required) - {{name | title}} UUID

**Response:**
```json
{
  "success": true,
  "data": {
    "id": "uuid",
    "name": "John Doe",
    "email": "john.doe@example.com",
    "created_at": "2024-01-01T00:00:00Z",
    "updated_at": "2024-01-01T00:00:00Z"
  },
  "message": "{{name | title}} retrieved successfully",
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

**Status Codes:**
- `200 OK` - {{name | title}} retrieved successfully
- `404 Not Found` - {{name | title}} not found
- `500 Internal Server Error` - Server error

#### Update {{name | title}}

**PUT** `/{{name}}s/{id}`

Updates an existing {{name}}.

**Path Parameters:**
- `id` (string, required) - {{name | title}} UUID

**Request Body:**
```json
{
  "name": "John Smith",
  "email": "john.smith@example.com"
}
```

**Response:**
```json
{
  "success": true,
  "data": {
    "id": "uuid",
    "name": "John Smith",
    "email": "john.smith@example.com",
    "created_at": "2024-01-01T00:00:00Z",
    "updated_at": "2024-01-01T00:00:00Z"
  },
  "message": "{{name | title}} updated successfully",
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

**Status Codes:**
- `200 OK` - {{name | title}} updated successfully
- `400 Bad Request` - Invalid input data
- `404 Not Found` - {{name | title}} not found
- `500 Internal Server Error` - Server error

#### Delete {{name | title}}

**DELETE** `/{{name}}s/{id}`

Deletes a specific {{name}}.

**Path Parameters:**
- `id` (string, required) - {{name | title}} UUID

**Response:**
```json
{
  "success": true,
  "data": null,
  "message": "{{name | title}} deleted successfully",
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

**Status Codes:**
- `200 OK` - {{name | title}} deleted successfully
- `404 Not Found` - {{name | title}} not found
- `500 Internal Server Error` - Server error

#### List {{name | title}}s

**GET** `/{{name}}s`

Retrieves a paginated list of {{name}}s.

**Query Parameters:**
- `page` (integer, optional) - Page number (default: 1)
- `limit` (integer, optional) - Items per page (default: 20, max: 100)
- `sort` (string, optional) - Sort field (default: created_at)
- `search` (string, optional) - Search term
- `filter` (object, optional) - Filter criteria

**Response:**
```json
{
  "success": true,
  "data": {
    "items": [
      {
        "id": "uuid",
        "name": "John Doe",
        "email": "john.doe@example.com",
        "created_at": "2024-01-01T00:00:00Z",
        "updated_at": "2024-01-01T00:00:00Z"
      }
    ],
    "pagination": {
      "total": 100,
      "page": 1,
      "limit": 20,
      "pages": 5,
      "has_next": true,
      "has_prev": false
    }
  },
  "message": "{{name | title}}s retrieved successfully",
  "timestamp": "2024-01-01T00:00:00Z",
  "request_id": "uuid"
}
```

**Status Codes:**
- `200 OK` - {{name | title}}s retrieved successfully
- `400 Bad Request` - Invalid query parameters
- `500 Internal Server Error` - Server error

#### Health Check

**GET** `/health`

Returns the health status of the service.

**Response:**
```json
{
  "status": "healthy",
  "version": "1.0.0",
  "timestamp": "2024-01-01T00:00:00Z",
  "uptime": 3600,
  "dependencies": {
    "database": "healthy",
    "cache": "healthy",
    "message_queue": "healthy"
  }
}
```

## 🗄️ Database Schema

### Tables

#### users

Stores user information.

| Column | Type | Constraints | Description |
|--------|------|-------------|-------------|
| id | UUID | PRIMARY KEY, DEFAULT gen_random_uuid() | Unique user identifier |
| name | VARCHAR(100) | NOT NULL | User's full name |
| email | VARCHAR(255) | NOT NULL, UNIQUE | User's email address |
| created_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Creation timestamp |
| updated_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Last update timestamp |

#### products

Stores product information.

| Column | Type | Constraints | Description |
|--------|------|-------------|-------------|
| id | UUID | PRIMARY KEY, DEFAULT gen_random_uuid() | Unique product identifier |
| name | VARCHAR(200) | NOT NULL | Product name |
| description | TEXT | NULL | Product description |
| price | DECIMAL(10,2) | NOT NULL, CHECK (price >= 0) | Product price |
| category_id | UUID | FOREIGN KEY REFERENCES categories(id) | Product category |
| created_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Creation timestamp |
| updated_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Last update timestamp |

#### categories

Stores category information.

| Column | Type | Constraints | Description |
|--------|------|-------------|-------------|
| id | UUID | PRIMARY KEY, DEFAULT gen_random_uuid() | Unique category identifier |
| name | VARCHAR(100) | NOT NULL | Category name |
| description | TEXT | NULL | Category description |
| parent_id | UUID | FOREIGN KEY REFERENCES categories(id) | Parent category |
| created_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Creation timestamp |
| updated_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Last update timestamp |

#### orders

Stores order information.

| Column | Type | Constraints | Description |
|--------|------|-------------|-------------|
| id | UUID | PRIMARY KEY, DEFAULT gen_random_uuid() | Unique order identifier |
| user_id | UUID | NOT NULL, FOREIGN KEY REFERENCES users(id) | Order owner |
| total_amount | DECIMAL(10,2) | NOT NULL, CHECK (total_amount >= 0) | Total order amount |
| status | VARCHAR(50) | NOT NULL, DEFAULT 'pending' | Order status |
| created_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Creation timestamp |
| updated_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Last update timestamp |

#### order_items

Stores order item information.

| Column | Type | Constraints | Description |
|--------|------|-------------|-------------|
| id | UUID | PRIMARY KEY, DEFAULT gen_random_uuid() | Unique order item identifier |
| order_id | UUID | NOT NULL, FOREIGN KEY REFERENCES orders(id) ON DELETE CASCADE | Parent order |
| product_id | UUID | NOT NULL, FOREIGN KEY REFERENCES products(id) | Product |
| quantity | INTEGER | NOT NULL, CHECK (quantity > 0) | Item quantity |
| unit_price | DECIMAL(10,2) | NOT NULL, CHECK (unit_price >= 0) | Unit price |
| created_at | TIMESTAMP WITH TIME ZONE | NOT NULL, DEFAULT CURRENT_TIMESTAMP | Creation timestamp |

### Indexes

| Name | Table | Columns | Type | Description |
|------|-------|---------|------|-------------|
| idx_users_email | users | email | UNIQUE | Fast email lookups |
| idx_users_created_at | users | created_at | BTREE | Sort by creation date |
| idx_products_name | products | name | BTREE | Product name searches |
| idx_products_category | products | category_id | BTREE | Category filtering |
| idx_orders_user_id | orders | user_id | BTREE | User order lookups |
| idx_orders_status | orders | status | BTREE | Status filtering |
| idx_order_items_order_id | order_items | order_id | BTREE | Order item lookups |

### Triggers

| Name | Table | Event | Function | Description |
|------|-------|-------|----------|-------------|
| trigger_users_updated_at | users | UPDATE | update_updated_at_column() | Auto-update timestamp |
| trigger_products_updated_at | products | UPDATE | update_updated_at_column() | Auto-update timestamp |
| trigger_categories_updated_at | categories | UPDATE | update_updated_at_column() | Auto-update timestamp |
| trigger_orders_updated_at | orders | UPDATE | update_updated_at_column() | Auto-update timestamp |

## 📋 Business Rules

### User Management

1. **Email Uniqueness**: Each user must have a unique email address
2. **Name Validation**: User names must be between 2 and 100 characters
3. **Email Validation**: Email addresses must follow RFC 5322 format
4. **Account Status**: Users can be active, suspended, or deleted
5. **Password Policy**: Passwords must meet security requirements

### Product Management

1. **Price Validation**: Product prices must be non-negative
2. **Category Assignment**: Products must belong to a valid category
3. **Inventory Tracking**: Product inventory cannot go negative
4. **Status Management**: Products can be draft, active, or discontinued

### Order Management

1. **Order Validation**: Orders must have at least one item
2. **Status Transitions**: Order status follows a defined workflow
3. **Payment Processing**: Orders require successful payment
4. **Cancellation Policy**: Orders can be cancelled within 24 hours

### Data Integrity

1. **Foreign Key Constraints**: All relationships must be valid
2. **Cascade Deletes**: Related data is cleaned up automatically
3. **Transaction Isolation**: Database operations are atomic
4. **Audit Trail**: All changes are logged with timestamps

## 🚀 Deployment

### Environment Configuration

#### Development
```bash
export DATABASE_URL="postgresql://localhost/comprehensive_showcase_dev"
export REDIS_URL="redis://localhost:6379"
export JWT_SECRET="dev-secret-key"
export LOG_LEVEL="debug"
export API_PORT="3000"
```

#### Staging
```bash
export DATABASE_URL="postgresql://staging-db/comprehensive_showcase_staging"
export REDIS_URL="redis://staging-redis:6379"
export JWT_SECRET="staging-secret-key"
export LOG_LEVEL="info"
export API_PORT="3000"
```

#### Production
```bash
export DATABASE_URL="postgresql://prod-db/comprehensive_showcase_prod"
export REDIS_URL="redis://prod-redis:6379"
export JWT_SECRET="production-secret-key"
export LOG_LEVEL="warn"
export API_PORT="3000"
```

### Docker Deployment

#### Dockerfile
```dockerfile
FROM rust:1.75-slim as builder

WORKDIR /app
COPY . .
RUN cargo build --release

FROM debian:bookworm-slim
RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
COPY --from=builder /app/target/release/comprehensive-rust-showcase /usr/local/bin/
EXPOSE 3000
CMD ["comprehensive-rust-showcase"]
```

#### Docker Compose
```yaml
version: '3.8'
services:
  app:
    build: .
    ports:
      - "3000:3000"
    environment:
      - DATABASE_URL=postgresql://postgres:password@db:5432/comprehensive_showcase
      - REDIS_URL=redis://redis:6379
    depends_on:
      - db
      - redis

  db:
    image: postgres:15
    environment:
      - POSTGRES_DB=comprehensive_showcase
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=password
    volumes:
      - postgres_data:/var/lib/postgresql/data

  redis:
    image: redis:7-alpine
    volumes:
      - redis_data:/data

volumes:
  postgres_data:
  redis_data:
```

### Kubernetes Deployment

#### Deployment
```yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: comprehensive-rust-showcase
spec:
  replicas: 3
  selector:
    matchLabels:
      app: comprehensive-rust-showcase
  template:
    metadata:
      labels:
        app: comprehensive-rust-showcase
    spec:
      containers:
      - name: app
        image: comprehensive-rust-showcase:latest
        ports:
        - containerPort: 3000
        env:
        - name: DATABASE_URL
          valueFrom:
            secretKeyRef:
              name: db-secret
              key: url
        - name: REDIS_URL
          valueFrom:
            secretKeyRef:
              name: redis-secret
              key: url
        resources:
          requests:
            memory: "256Mi"
            cpu: "250m"
          limits:
            memory: "512Mi"
            cpu: "500m"
        livenessProbe:
          httpGet:
            path: /health
            port: 3000
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /health
            port: 3000
          initialDelaySeconds: 5
          periodSeconds: 5
```

#### Service
```yaml
apiVersion: v1
kind: Service
metadata:
  name: comprehensive-rust-showcase-service
spec:
  selector:
    app: comprehensive-rust-showcase
  ports:
  - port: 80
    targetPort: 3000
  type: LoadBalancer
```

### CI/CD Pipeline

#### GitHub Actions
```yaml
name: CI/CD Pipeline

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]

jobs:
  test:
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres:15
        env:
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: test_db
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

    steps:
    - uses: actions/checkout@v3
    - name: Setup Rust
      uses: actions-rs/toolchain@v1
      with:
        toolchain: stable
        components: rustfmt, clippy

    - name: Cache dependencies
      uses: actions/cache@v3
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          target
        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}

    - name: Install dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y libpq-dev

    - name: Run tests
      run: |
        cargo test --verbose
        cargo clippy -- -D warnings
        cargo fmt --check

    - name: Run security audit
      run: |
        cargo install cargo-audit
        cargo audit

  build:
    needs: test
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - name: Build Docker image
      run: |
        docker build -t comprehensive-rust-showcase:${{ github.sha }} .
        docker tag comprehensive-rust-showcase:${{ github.sha }} comprehensive-rust-showcase:latest

  deploy:
    needs: build
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'
    steps:
    - name: Deploy to production
      run: |
        echo "Deploying to production..."
        # Add deployment steps here
```

## 📊 Monitoring

### Metrics

#### Application Metrics
- **Request Rate**: Requests per second
- **Response Time**: Average response time in milliseconds
- **Error Rate**: Percentage of failed requests
- **Active Connections**: Number of active database connections
- **Memory Usage**: Memory consumption in MB
- **CPU Usage**: CPU utilization percentage

#### Business Metrics
- **User Registrations**: New user signups per day
- **Active Users**: Number of active users
- **Order Volume**: Number of orders processed
- **Revenue**: Total revenue generated
- **Conversion Rate**: Percentage of visitors who convert

### Logging

#### Log Levels
- **ERROR**: System errors and exceptions
- **WARN**: Warning conditions and recoverable errors
- **INFO**: General information about system operation
- **DEBUG**: Detailed information for debugging
- **TRACE**: Very detailed information for troubleshooting

#### Log Format
```json
{
  "timestamp": "2024-01-01T00:00:00Z",
  "level": "INFO",
  "message": "User created successfully",
  "request_id": "uuid",
  "user_id": "uuid",
  "service": "user-service",
  "version": "1.0.0",
  "environment": "production"
}
```

### Alerting

#### Critical Alerts
- **Service Down**: Service is not responding
- **High Error Rate**: Error rate exceeds 5%
- **Database Connection Failure**: Cannot connect to database
- **Memory Usage High**: Memory usage exceeds 80%
- **Disk Space Low**: Disk space below 10%

#### Warning Alerts
- **Response Time High**: Average response time exceeds 1 second
- **CPU Usage High**: CPU usage exceeds 70%
- **Queue Depth High**: Message queue depth exceeds threshold
- **Cache Hit Rate Low**: Cache hit rate below 80%

### Dashboards

#### Grafana Dashboard
```json
{
  "dashboard": {
    "title": "Comprehensive Rust Showcase",
    "panels": [
      {
        "title": "Request Rate",
        "type": "graph",
        "targets": [
          {
            "expr": "rate(http_requests_total[5m])",
            "legendFormat": "{{method}} {{endpoint}}"
          }
        ]
      },
      {
        "title": "Response Time",
        "type": "graph",
        "targets": [
          {
            "expr": "histogram_quantile(0.95, rate(http_request_duration_seconds_bucket[5m]))",
            "legendFormat": "95th percentile"
          }
        ]
      },
      {
        "title": "Error Rate",
        "type": "graph",
        "targets": [
          {
            "expr": "rate(http_requests_total{status=~\"5..\"}[5m])",
            "legendFormat": "5xx errors"
          }
        ]
      }
    ]
  }
}
```

## 🔒 Security

### Authentication

#### JWT Tokens
- **Algorithm**: HS256
- **Expiration**: 24 hours
- **Refresh Token**: 7 days
- **Claims**: user_id, email, roles, permissions

#### Password Security
- **Minimum Length**: 8 characters
- **Complexity**: Must contain uppercase, lowercase, number, and special character
- **Hashing**: bcrypt with salt rounds = 12
- **History**: Cannot reuse last 5 passwords

### Authorization

#### Role-Based Access Control (RBAC)
- **Admin**: Full system access
- **Manager**: User and product management
- **User**: Basic CRUD operations
- **Guest**: Read-only access

#### Permissions
- **users:create**: Create new users
- **users:read**: View user information
- **users:update**: Modify user data
- **users:delete**: Remove users
- **products:manage**: Full product management
- **orders:process**: Process orders

### Data Protection

#### Encryption
- **At Rest**: AES-256 encryption for sensitive data
- **In Transit**: TLS 1.3 for all communications
- **Database**: Encrypted connections and data
- **Backups**: Encrypted backup storage

#### Input Validation
- **Sanitization**: All inputs are sanitized
- **Validation**: Strict validation rules
- **SQL Injection**: Parameterized queries only
- **XSS Protection**: Output encoding and CSP headers

### Security Headers

#### HTTP Security Headers
```
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block
Content-Security-Policy: default-src 'self'
Referrer-Policy: strict-origin-when-cross-origin
```

### Vulnerability Management

#### Dependency Scanning
- **Automated**: Daily dependency scans
- **Tools**: cargo-audit, snyk
- **Policy**: Zero tolerance for high/critical vulnerabilities
- **Updates**: Automated security updates

#### Code Analysis
- **Static Analysis**: Clippy, rust-analyzer
- **Dynamic Analysis**: Runtime security testing
- **Penetration Testing**: Quarterly security assessments
- **Bug Bounty**: Public vulnerability reporting

## ⚡ Performance

### Optimization Strategies

#### Database Optimization
- **Indexing**: Strategic index placement
- **Query Optimization**: Efficient SQL queries
- **Connection Pooling**: Managed connection pools
- **Caching**: Redis for frequently accessed data

#### Application Optimization
- **Async Processing**: Non-blocking I/O operations
- **Memory Management**: Efficient memory usage
- **CPU Optimization**: Multi-threading and parallel processing
- **Network Optimization**: HTTP/2 and compression

### Performance Targets

#### Response Time Targets
- **API Endpoints**: < 200ms (95th percentile)
- **Database Queries**: < 50ms (95th percentile)
- **Cache Operations**: < 10ms (95th percentile)
- **File Operations**: < 100ms (95th percentile)

#### Throughput Targets
- **Requests per Second**: > 1000 RPS
- **Concurrent Users**: > 10,000 users
- **Database Connections**: < 100 connections
- **Memory Usage**: < 512MB per instance

### Monitoring and Alerting

#### Performance Metrics
- **Response Time**: P50, P95, P99 percentiles
- **Throughput**: Requests per second
- **Error Rate**: Percentage of failed requests
- **Resource Usage**: CPU, memory, disk, network

#### Performance Alerts
- **Slow Queries**: Queries taking > 1 second
- **High Memory Usage**: Memory usage > 80%
- **CPU Saturation**: CPU usage > 90%
- **Network Latency**: Network latency > 100ms

### Load Testing

#### Test Scenarios
- **Normal Load**: Expected production traffic
- **Peak Load**: 2x normal traffic
- **Stress Test**: 5x normal traffic
- **Spike Test**: Sudden traffic increases

#### Test Tools
- **Artillery**: Load testing framework
- **k6**: Performance testing tool
- **JMeter**: Apache JMeter for comprehensive testing
- **Custom Scripts**: Tailored test scenarios

## 🧪 Testing

### Test Strategy

#### Test Pyramid
- **Unit Tests**: 70% - Individual component testing
- **Integration Tests**: 20% - Component interaction testing
- **E2E Tests**: 10% - Full system testing

#### Test Types
- **Functional Tests**: Feature validation
- **Performance Tests**: Load and stress testing
- **Security Tests**: Vulnerability assessment
- **Chaos Tests**: Resilience testing

### Test Environment

#### Test Data Management
- **Fixtures**: Predefined test data
- **Factories**: Dynamic test data generation
- **Seeding**: Database seeding for tests
- **Cleanup**: Automatic test data cleanup

#### Test Infrastructure
- **Test Database**: Isolated test database
- **Mock Services**: External service mocking
- **Test Containers**: Docker-based test environments
- **CI/CD Integration**: Automated test execution

### Test Coverage

#### Coverage Targets
- **Code Coverage**: > 90%
- **Branch Coverage**: > 85%
- **Function Coverage**: > 95%
- **Line Coverage**: > 90%

#### Coverage Tools
- **tarpaulin**: Rust code coverage
- **cargo-llvm-cov**: LLVM-based coverage
- **SonarQube**: Code quality analysis
- **Codecov**: Coverage reporting

### Test Automation

#### Continuous Testing
- **Pre-commit**: Local test execution
- **CI Pipeline**: Automated test runs
- **Nightly Tests**: Extended test suites
- **Release Tests**: Production readiness validation

#### Test Reporting
- **JUnit Reports**: Standard test results
- **Coverage Reports**: Code coverage metrics
- **Performance Reports**: Performance test results
- **Security Reports**: Security test findings

## 🔧 Troubleshooting

### Common Issues

#### Database Connection Issues
**Symptoms:**
- Connection timeouts
- Pool exhaustion
- Query failures

**Solutions:**
1. Check database connectivity
2. Verify connection pool configuration
3. Monitor database performance
4. Check network connectivity

#### Performance Issues
**Symptoms:**
- Slow response times
- High CPU usage
- Memory leaks

**Solutions:**
1. Profile application performance
2. Optimize database queries
3. Implement caching strategies
4. Scale horizontally

#### Security Issues
**Symptoms:**
- Authentication failures
- Authorization errors
- Security vulnerabilities

**Solutions:**
1. Review security policies
2. Update dependencies
3. Implement security patches
4. Conduct security audits

### Debugging Tools

#### Application Debugging
- **Logging**: Structured logging with tracing
- **Profiling**: Performance profiling tools
- **Debugging**: Interactive debugging sessions
- **Monitoring**: Real-time system monitoring

#### Database Debugging
- **Query Analysis**: Slow query identification
- **Connection Monitoring**: Connection pool analysis
- **Performance Metrics**: Database performance tracking
- **Error Logging**: Database error analysis

### Support Resources

#### Documentation
- **API Documentation**: Comprehensive API reference
- **Architecture Docs**: System architecture overview
- **Deployment Guides**: Step-by-step deployment instructions
- **Troubleshooting Guides**: Common issue resolution

#### Community Support
- **GitHub Issues**: Bug reports and feature requests
- **Discord Channel**: Real-time community support
- **Stack Overflow**: Technical question and answers
- **Documentation Site**: Comprehensive documentation

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**Last Updated**: {{ "now" | date(format="%Y-%m-%d %H:%M:%S") }}  
**Version**: 1.0.0  
**Generated by**: ggen comprehensive showcase
