module-registry 0.1.0

# Use Cases - Module Registry

## Overview

This document provides comprehensive use cases and real-world scenarios for the Module Registry module.

## Web Application Architecture

### Modular Web Framework

**Scenario**: A web application needs a modular architecture where different components can be dynamically loaded and managed.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new();
    
    // Register web application modules
    let web_modules = vec![
        ("auth-module", ModuleType::Security, vec!["authentication", "authorization"]),
        ("user-module", ModuleType::DataProcessor, vec!["user-management", "profile"]),
        ("content-module", ModuleType::DataProcessor, vec!["content-management", "publishing"]),
        ("api-module", ModuleType::Network, vec!["api-gateway", "routing"]),
        ("cache-module", ModuleType::Storage, vec!["caching", "session-management"]),
    ];
    
    for (name, module_type, capabilities) in web_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(module_type);
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Use modules in web application
    let auth_module = registry.create("auth-module")?;
    let user_module = registry.create("user-module")?;
    let content_module = registry.create("content-module")?;
    let api_module = registry.create("api-module")?;
    let cache_module = registry.create("cache-module")?;
    
    println!("Web application modules registered and ready");
    
    Ok(())
}
```

### Dynamic Content Management

**Scenario**: A content management system needs to dynamically load and manage different content processors.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, CapabilityQuery};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new();
    
    // Register content processing modules
    let content_modules = vec![
        ("markdown-processor", vec!["markdown", "text-processing"]),
        ("image-processor", vec!["image-processing", "resizing", "optimization"]),
        ("video-processor", vec!["video-processing", "transcoding", "streaming"]),
        ("pdf-processor", vec!["pdf-processing", "text-extraction", "conversion"]),
    ];
    
    for (name, capabilities) in content_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor);
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Discover content processors by capability
    let query = CapabilityQuery::new()
        .with_required_capabilities(vec!["text-processing"]);
    
    let text_processors = registry.discover_capabilities(query)?;
    println!("Found {} text processors", text_processors.len());
    
    Ok(())
}
```

## Microservice Architecture

### Service Discovery and Management

**Scenario**: A microservice architecture needs dynamic service discovery and management.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, ServiceDiscoveryQuery};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new();
    
    // Register microservice modules
    let microservices = vec![
        ("user-service", "User management service", vec!["user-management", "authentication"]),
        ("order-service", "Order processing service", vec!["order-management", "payment-processing"]),
        ("inventory-service", "Inventory management service", vec!["inventory-management", "stock-tracking"]),
        ("notification-service", "Notification service", vec!["email", "sms", "push-notifications"]),
        ("analytics-service", "Analytics service", vec!["data-analysis", "reporting", "metrics"]),
    ];
    
    for (name, description, capabilities) in microservices {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::Network)
            .with_metadata("description", description)
            .with_metadata("service_type", "microservice");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Discover services by capability
    let query = ServiceDiscoveryQuery::new()
        .with_required_capabilities(vec!["user-management"]);
    
    let user_services = registry.discover_services(query)?;
    println!("Found {} user management services", user_services.len());
    
    Ok(())
}
```

### Service Orchestration

**Scenario**: A microservice architecture needs to orchestrate multiple services for complex workflows.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, WorkflowOrchestration};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_workflow_orchestration(true);
    
    // Register workflow modules
    let workflow_modules = vec![
        ("order-workflow", "Order processing workflow"),
        ("payment-workflow", "Payment processing workflow"),
        ("inventory-workflow", "Inventory management workflow"),
        ("notification-workflow", "Notification workflow"),
    ];
    
    for (name, description) in workflow_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("workflow_type", "orchestration");
        
        registry.register(config)?;
    }
    
    // Orchestrate workflow
    let order_workflow = registry.create("order-workflow")?;
    let payment_workflow = registry.create("payment-workflow")?;
    let inventory_workflow = registry.create("inventory-workflow")?;
    let notification_workflow = registry.create("notification-workflow")?;
    
    // Execute workflow
    let order_data = b"order data";
    let order_result = order_workflow.process(order_data)?;
    
    let payment_data = b"payment data";
    let payment_result = payment_workflow.process(payment_data)?;
    
    let inventory_data = b"inventory data";
    let inventory_result = inventory_workflow.process(inventory_data)?;
    
    let notification_data = b"notification data";
    let notification_result = notification_workflow.process(notification_data)?;
    
    println!("Workflow orchestration completed");
    
    Ok(())
}
```

## Plugin Architecture

### Extensible Application Framework

**Scenario**: An application needs to support plugins for extensibility and customization.

**Solution**:
```rust
use module_registry::{ModuleRegistry, PluginConfig, PluginType, PluginDiscoveryQuery};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new();
    
    // Register plugin modules
    let plugins = vec![
        ("data-processor-plugin", "Data processing plugin", vec!["data-processing", "transformation"]),
        ("encryption-plugin", "Encryption plugin", vec!["encryption", "decryption", "key-management"]),
        ("compression-plugin", "Compression plugin", vec!["compression", "decompression", "optimization"]),
        ("monitoring-plugin", "Monitoring plugin", vec!["monitoring", "logging", "alerting"]),
        ("analytics-plugin", "Analytics plugin", vec!["data-analysis", "reporting", "visualization"]),
    ];
    
    for (name, description, capabilities) in plugins {
        let config = PluginConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(PluginType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("plugin_type", "extension");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register_plugin(config)?;
    }
    
    // Discover plugins by capability
    let query = PluginDiscoveryQuery::new()
        .with_required_capabilities(vec!["data-processing"]);
    
    let data_plugins = registry.discover_plugins(query)?;
    println!("Found {} data processing plugins", data_plugins.len());
    
    Ok(())
}
```

### Plugin Marketplace

**Scenario**: A plugin marketplace needs to manage and distribute plugins.

**Solution**:
```rust
use module_registry::{ModuleRegistry, PluginConfig, PluginType, PluginMarketplace};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_plugin_marketplace(true);
    
    // Register marketplace plugins
    let marketplace_plugins = vec![
        ("premium-data-processor", "Premium data processor", "commercial"),
        ("open-source-encryption", "Open source encryption", "open-source"),
        ("enterprise-analytics", "Enterprise analytics", "enterprise"),
        ("community-monitoring", "Community monitoring", "community"),
    ];
    
    for (name, description, license_type) in marketplace_plugins {
        let config = PluginConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(PluginType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("license_type", license_type)
            .with_metadata("marketplace", "true");
        
        registry.register_plugin(config)?;
    }
    
    // Use marketplace plugins
    let premium_processor = registry.create_plugin("premium-data-processor")?;
    let open_source_encryption = registry.create_plugin("open-source-encryption")?;
    let enterprise_analytics = registry.create_plugin("enterprise-analytics")?;
    let community_monitoring = registry.create_plugin("community-monitoring")?;
    
    println!("Marketplace plugins registered and ready");
    
    Ok(())
}
```

## Data Processing Pipeline

### ETL Pipeline

**Scenario**: An ETL (Extract, Transform, Load) pipeline needs to process data through multiple stages.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, PipelineOrchestration};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_pipeline_orchestration(true);
    
    // Register ETL pipeline modules
    let etl_modules = vec![
        ("extract-module", "Data extraction module", vec!["extraction", "data-ingestion"]),
        ("transform-module", "Data transformation module", vec!["transformation", "data-processing"]),
        ("load-module", "Data loading module", vec!["loading", "data-storage"]),
        ("validation-module", "Data validation module", vec!["validation", "quality-assurance"]),
        ("monitoring-module", "Pipeline monitoring module", vec!["monitoring", "alerting"]),
    ];
    
    for (name, description, capabilities) in etl_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("pipeline_stage", "etl");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Execute ETL pipeline
    let extract_module = registry.create("extract-module")?;
    let transform_module = registry.create("transform-module")?;
    let load_module = registry.create("load-module")?;
    let validation_module = registry.create("validation-module")?;
    let monitoring_module = registry.create("monitoring-module")?;
    
    // Process data through pipeline
    let raw_data = b"raw data";
    let extracted_data = extract_module.process(raw_data)?;
    let transformed_data = transform_module.process(&extracted_data)?;
    let validated_data = validation_module.process(&transformed_data)?;
    let loaded_data = load_module.process(&validated_data)?;
    let monitoring_data = monitoring_module.process(&loaded_data)?;
    
    println!("ETL pipeline completed successfully");
    
    Ok(())
}
```

### Real-time Data Processing

**Scenario**: A real-time data processing system needs to handle streaming data.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, StreamProcessing};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_stream_processing(true);
    
    // Register stream processing modules
    let stream_modules = vec![
        ("stream-ingestion", "Stream data ingestion", vec!["streaming", "data-ingestion"]),
        ("stream-processing", "Stream data processing", vec!["streaming", "real-time-processing"]),
        ("stream-analytics", "Stream analytics", vec!["streaming", "analytics", "real-time"]),
        ("stream-storage", "Stream data storage", vec!["streaming", "storage", "persistence"]),
        ("stream-monitoring", "Stream monitoring", vec!["streaming", "monitoring", "alerting"]),
    ];
    
    for (name, description, capabilities) in stream_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("processing_type", "stream");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Process streaming data
    let stream_ingestion = registry.create("stream-ingestion")?;
    let stream_processing = registry.create("stream-processing")?;
    let stream_analytics = registry.create("stream-analytics")?;
    let stream_storage = registry.create("stream-storage")?;
    let stream_monitoring = registry.create("stream-monitoring")?;
    
    // Process streaming data
    let stream_data = b"streaming data";
    let ingested_data = stream_ingestion.process(stream_data)?;
    let processed_data = stream_processing.process(&ingested_data)?;
    let analytics_data = stream_analytics.process(&processed_data)?;
    let stored_data = stream_storage.process(&analytics_data)?;
    let monitoring_data = stream_monitoring.process(&stored_data)?;
    
    println!("Stream processing completed successfully");
    
    Ok(())
}
```

## Security and Compliance

### Security Module Management

**Scenario**: A security system needs to manage different security modules.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, SecurityModuleManagement};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_security_module_management(true);
    
    // Register security modules
    let security_modules = vec![
        ("authentication-module", "User authentication", vec!["authentication", "login"]),
        ("authorization-module", "User authorization", vec!["authorization", "permissions"]),
        ("encryption-module", "Data encryption", vec!["encryption", "decryption", "key-management"]),
        ("audit-module", "Security auditing", vec!["auditing", "logging", "compliance"]),
        ("monitoring-module", "Security monitoring", vec!["monitoring", "alerting", "threat-detection"]),
    ];
    
    for (name, description, capabilities) in security_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::Security)
            .with_metadata("description", description)
            .with_metadata("security_level", "high");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Use security modules
    let auth_module = registry.create("authentication-module")?;
    let authz_module = registry.create("authorization-module")?;
    let encryption_module = registry.create("encryption-module")?;
    let audit_module = registry.create("audit-module")?;
    let monitoring_module = registry.create("monitoring-module")?;
    
    println!("Security modules registered and ready");
    
    Ok(())
}
```

### Compliance Management

**Scenario**: A compliance system needs to manage different compliance modules.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, ComplianceManagement};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_compliance_management(true);
    
    // Register compliance modules
    let compliance_modules = vec![
        ("gdpr-module", "GDPR compliance", vec!["gdpr", "privacy", "data-protection"]),
        ("hipaa-module", "HIPAA compliance", vec!["hipaa", "healthcare", "privacy"]),
        ("sox-module", "SOX compliance", vec!["sox", "financial", "auditing"]),
        ("pci-module", "PCI compliance", vec!["pci", "payment", "security"]),
        ("iso-module", "ISO compliance", vec!["iso", "standards", "certification"]),
    ];
    
    for (name, description, capabilities) in compliance_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::Security)
            .with_metadata("description", description)
            .with_metadata("compliance_type", "regulatory");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Use compliance modules
    let gdpr_module = registry.create("gdpr-module")?;
    let hipaa_module = registry.create("hipaa-module")?;
    let sox_module = registry.create("sox-module")?;
    let pci_module = registry.create("pci-module")?;
    let iso_module = registry.create("iso-module")?;
    
    println!("Compliance modules registered and ready");
    
    Ok(())
}
```

## IoT and Edge Computing

### IoT Device Management

**Scenario**: An IoT system needs to manage different device modules.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, IoTDeviceManagement};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_iot_device_management(true);
    
    // Register IoT device modules
    let iot_modules = vec![
        ("sensor-module", "Sensor data collection", vec!["sensors", "data-collection"]),
        ("actuator-module", "Actuator control", vec!["actuators", "control", "automation"]),
        ("communication-module", "Device communication", vec!["communication", "networking"]),
        ("storage-module", "Device storage", vec!["storage", "data-persistence"]),
        ("monitoring-module", "Device monitoring", vec!["monitoring", "health-check"]),
    ];
    
    for (name, description, capabilities) in iot_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("device_type", "iot");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Use IoT modules
    let sensor_module = registry.create("sensor-module")?;
    let actuator_module = registry.create("actuator-module")?;
    let communication_module = registry.create("communication-module")?;
    let storage_module = registry.create("storage-module")?;
    let monitoring_module = registry.create("monitoring-module")?;
    
    println!("IoT modules registered and ready");
    
    Ok(())
}
```

### Edge Computing

**Scenario**: An edge computing system needs to manage different edge modules.

**Solution**:
```rust
use module_registry::{ModuleRegistry, ModuleConfig, ModuleType, EdgeComputing};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let registry = ModuleRegistry::new()
        .with_edge_computing(true);
    
    // Register edge computing modules
    let edge_modules = vec![
        ("edge-processing", "Edge data processing", vec!["edge", "processing", "real-time"]),
        ("edge-storage", "Edge data storage", vec!["edge", "storage", "local"]),
        ("edge-analytics", "Edge analytics", vec!["edge", "analytics", "insights"]),
        ("edge-communication", "Edge communication", vec!["edge", "communication", "networking"]),
        ("edge-monitoring", "Edge monitoring", vec!["edge", "monitoring", "health"]),
    ];
    
    for (name, description, capabilities) in edge_modules {
        let config = ModuleConfig::new()
            .with_name(name)
            .with_version("1.0.0")
            .with_type(ModuleType::DataProcessor)
            .with_metadata("description", description)
            .with_metadata("computing_type", "edge");
        
        for capability in capabilities {
            config.add_capability(capability);
        }
        
        registry.register(config)?;
    }
    
    // Use edge modules
    let edge_processing = registry.create("edge-processing")?;
    let edge_storage = registry.create("edge-storage")?;
    let edge_analytics = registry.create("edge-analytics")?;
    let edge_communication = registry.create("edge-communication")?;
    let edge_monitoring = registry.create("edge-monitoring")?;
    
    println!("Edge computing modules registered and ready");
    
    Ok(())
}
```

## Conclusion

These use cases demonstrate the comprehensive capabilities of the Module Registry across various domains and scenarios. By implementing these patterns, you can create sophisticated, scalable, and maintainable module-based architectures.

Key use case categories:

1. **Web Application Architecture**: Modular web frameworks and content management
2. **Microservice Architecture**: Service discovery, orchestration, and management
3. **Plugin Architecture**: Extensible frameworks and plugin marketplaces
4. **Data Processing Pipeline**: ETL pipelines and real-time data processing
5. **Security and Compliance**: Security module management and compliance systems
6. **IoT and Edge Computing**: IoT device management and edge computing systems