---
title: "Development"
description: "Documentation for Development"
last_updated: 2025-05-30
---
[AIR-3][AIS-3][BPC-3][RES-3]
# Anya Development Guide
## Overview
Add a brief overview of this document here.
## Table of Contents
- [Section 1](#section-1)
- [Section 2](#section-2)
## 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
```bash
## 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:
```rust
// 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:
```rust
// 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](./READ_FIRST_ALWAYS.md).
### 3. Caching System
The caching system provides performance optimization:
```rust
// 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:
```rust
// 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:
```rust
// 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:
```rust
// 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
```rust
// 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
```rust
// 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
```rust
#[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
```rust
// Use structured logging
log::info!("Operation completed: {}", operation_id);
log::error!("Operation failed: {}", error);
```
### 2. Metrics
```rust
// Record custom metrics
metrics_collector.record_performance_metric(
"query",
"user_search",
duration,
).await;
```
### 3. Health Checks
```rust
// 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
- [Related Document 1](../INSTALLATION.md)
- [Related Document 2](../INSTALLATION_REVIEW.md)