[AIR-3][AIS-3][BPC-3][RES-3]

Anya Development Guide

Overview

Add a brief overview of this document here.

Table of Contents

Development Environment Setup

Prerequisites

  1. Install Rust (1.70 or higher)
  2. Install Cargo package manager
  3. Clone the repository
  4. Install development dependencies

Building the Project

## Build the project
cargo build

## Run tests
cargo test

## Run with development features
cargo run --features "development"

Core Components

1. Web5Store

The Web5Store is the main entry point for data operations:

// Create a new store
let store = Web5Store::new().await?;

// Basic operations
store.create_record("users", data).await?;
store.get_record("record_id").await?;
store.update_record("record_id", new_data).await?;
store.delete_record("record_id").await?;

// Query records
let results = store.query_records("users", Some(filter)).await?;

2. Read First Always Principle

The Read First Always principle is a fundamental data consistency pattern implemented throughout Web5 components:

// Use the ReadFirstDwnManager instead of direct DWN operations
let manager = ReadFirstDwnManager::new(Arc::new(web5_client));

// Create operation (will automatically query similar records first)
let record = manager.create_record(&CreateRecordOptions {
    data: serde_json::to_string(&data)?,
    schema: "https://schema.org/VerifiableCredential".to_string(),
    data_format: "application/json".to_string(),
})?;

// Update operation (will automatically read the record first)
let updated_record = manager.update_record(&record.id, &UpdateRecordOptions {
    data: serde_json::to_string(&updated_data)?,
    data_format: "application/json".to_string(),
})?;

// Get metrics for compliance monitoring
let metrics = manager.get_metrics();
println!("Read count: {}, Write count: {}, Compliance: {}%",
    metrics.read_count, metrics.write_count, metrics.compliance_rate());

For detailed information, see the Read First Always documentation.

3. Caching System

The caching system provides performance optimization:

// Configure cache
let config = CacheConfig {
    max_size: NonZeroUsize::new(1000).unwrap(),
    default_ttl: Some(Duration::from_secs(3600)),
    notify_on_evict: true,
};

// Use cached operations
let result = store.get_cached("key").await?;
store.set_cached("key", value, Some(ttl)).await?;

4. Batch Operations

For efficient bulk data processing:

// Batch configuration
let options = BatchOptions {
    max_concurrent: 10,
    stop_on_error: false,
    timeout: Duration::from_secs(30),
};

// Perform batch operations
let records = vec![/* ... */];
let results = store.bulk_create("users", records).await?;

// Update multiple records
let updates = HashMap::new();
updates.insert("id1", json!({ "status": "active" }));
updates.insert("id2", json!({ "status": "inactive" }));
store.bulk_update("users", updates).await?;

5. Event System

The event system enables real-time notifications:

// Create event subscriber
let subscriber = EventSubscriber::new(&event_bus)
    .filter_by_type(EventType::RecordCreated)
    .filter_by_source("web5_store");

// Listen for events
while let Some(event) = subscriber.receive().await {
    println!("Received event: {:?}", event);
}

// Publish custom events
event_publisher.publish_event(
    EventType::Custom("user_action"),
    data,
    Some("correlation_id"),
    Some("user_id"),
    vec!["custom_tag"],
).await?;

6. Health Monitoring

Monitor system health and performance:

// Get system health
let health = store.get_health_status().await;
println!("System status: {:?}", health.status);

// Update component status
health_monitor.update_component_status(
    "cache",
    SystemStatus::Healthy,
    Some("Cache operating normally"),
    None,
).await;

// Subscribe to health events
let subscriber = EventSubscriber::new(&event_bus)
    .filter_by_type(EventType::HealthCheck);

Best Practices

1. Error Handling

// Use custom error types
#[derive(Error, Debug)]
pub enum StoreError {
    #[error("Validation error: {0}")]
    ValidationError(String),
    #[error("Record not found: {0}")]
    NotFound(String),
}

// Handle errors with context
match operation {
    Ok(result) => process_result(result),
    Err(e) => log_error_with_context(e, "Operation failed"),
}

2. Async Operations

// Use async/await consistently
async fn process_data() -> Result<(), Error> {
    let data = fetch_data().await?;
    process_in_background(data).await?;
    Ok(())
}

// Handle concurrent operations
let results = futures::future::join_all(operations).await;

3. Testing

#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_store_operations() {
        let store = setup_test_store().await;
        // Test operations
    }
}

Performance Optimization

1. Caching Strategy

  • Use appropriate cache sizes
  • Set reasonable TTL values
  • Monitor cache hit rates
  • Implement cache warming

2. Batch Processing

  • Choose optimal batch sizes
  • Use rate limiting
  • Handle partial failures
  • Monitor batch performance

3. Query Optimization

  • Use efficient filters
  • Implement pagination
  • Cache frequent queries
  • Monitor query performance

Monitoring and Debugging

1. Logging

// Use structured logging
log::info!("Operation completed: {}", operation_id);
log::error!("Operation failed: {}", error);

2. Metrics

// Record custom metrics
metrics_collector.record_performance_metric(
    "query",
    "user_search",
    duration,
).await;

3. Health Checks

// Implement custom health checks
async fn check_component_health() -> ComponentHealth {
    // Perform health check
    ComponentHealth {
        status: SystemStatus::Healthy,
        message: Some("Component operational"),
        details: None,
    }
}

Security Considerations

1. Authentication

  • Always validate DIDs
  • Implement proper access control
  • Use secure communication

2. Data Validation

  • Validate all input data
  • Use schema validation
  • Sanitize user input

3. Error Handling

  • Don't expose internal errors
  • Log security events
  • Implement rate limiting

Contributing

1. Code Style

  • Follow Rust style guidelines
  • Use meaningful names
  • Document public APIs
  • Write unit tests

2. Pull Requests

  • Create feature branches
  • Write clear descriptions
  • Include tests
  • Update documentation

3. Testing

  • Write unit tests
  • Add integration tests
  • Test edge cases
  • Measure performance

Last updated: 2025-06-02

See Also