### Running Python Xapp Example (Python)

Source: https://github.com/thc1006/ric-plt-xapp-frame-rust/blob/master/rmr/README.md

This snippet outlines the steps to run a Python Xapp example that integrates with the RMR library. It requires setting up a virtual environment and ensuring the `librmr_si.so` library and development files are installed in the expected path.

```bash
# Ensure librmr_si.so is in /usr/local/lib
# Setup virtual environment (example)
python -m venv venv
source venv/bin/activate
# Install dependencies (if any)
pip install -r requirements.txt
# Run the Python example
python ping_xapp.py
```

--------------------------------

### Build and Run Simple Client Example (Rust)

Source: https://github.com/thc1006/ric-plt-xapp-frame-rust/blob/master/rmr/README.md

This snippet demonstrates how to build and run the `simple_client` example using Cargo. It requires the RMR routing table to be set using the `RMR_SEED_RT` environment variable. Successful execution will compile and run the Rust client.

```bash
RMR_SEED_RT=./test_route.rt cargo run --example simple_client
```

--------------------------------

### Initialize and Start xApp with Configuration in Rust

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Demonstrates how to initialize an xApp instance with configuration, including messaging ports, and start its RMR receiver and web server. It waits for RMR to be ready and then enters a loop to process incoming RMR messages.

```rust
use std::sync::mpsc;
use xapp::{XApp, XAppConfig, ConfigMetadata};
use rmr::RMRMessageBuffer;
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Create configuration JSON
    let config_json = json!({
        "messaging": {
            "ports": [
                {"name": "rmrdata", "port": 4560},
                {"name": "http", "port": 8080}
            ]
        }
    });

    // Build XApp configuration
    let config = XAppConfig {
        metadata: Box::new(ConfigMetadata {
            xapp_name: "my-xapp".to_string(),
            config_type: "json".to_string(),
        }),
        config: config_json,
    };

    // Create message channel for RMR communication
    let (app_tx, app_rx) = mpsc::channel::<RMRMessageBuffer>();

    // Initialize xApp with configuration
    let mut xapp = XApp::from_config(config, app_tx)?;

    // Wait for RMR to be ready
    loop {
        if xapp.is_rmr_ready() {
            println!("RMR is ready!");
            break;
        }
        std::thread::sleep(std::time::Duration::from_millis(100));
    }

    // Start the xApp (starts RMR receiver and web server)
    xapp.start();

    // Process incoming messages
    for msg in app_rx {
        println!("Received message type: {}", msg.get_msgtype());
        println!("Message payload: {:?}", msg.get_payload());
    }

    Ok(())
}

```

--------------------------------

### SDL Data Storage Operations in Rust

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Demonstrates storing, retrieving, listing, and deleting data using the SDL with a Redis backend. It covers initializing the client, defining namespaces, and managing data entries and groups.

```rust
use sdl::{RedisStorage, SdlStorageApi, DataMap, KeySet};
use std::collections::{HashMap, BTreeSet};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Initialize Redis SDL client using environment variables
    // DBAAS_SERVICE_HOST and DBAAS_SERVICE_PORT
    std::env::set_var("DBAAS_SERVICE_HOST", "localhost");
    std::env::set_var("DBAAS_SERVICE_PORT", "6379");

    let mut sdl_client = RedisStorage::new_from_env()?;

    // Define namespace for data isolation
    let namespace = "xapp-demo";

    // Check if SDL is ready
    if !sdl_client.is_ready(namespace) {
        eprintln!("SDL is not ready");
        return Ok(())
    }

    // Prepare data to store
    let mut data: DataMap = HashMap::new();
    data.insert("cell:001".to_string(), b"active".to_vec());
    data.insert("cell:002".to_string(), b"inactive".to_vec());
    data.insert("config:version".to_string(), b"1.2.3".to_vec());

    // Store data in SDL
    sdl_client.set(namespace, &data)?;
    println!("Data stored successfully");

    // Retrieve specific keys
    let mut keys: KeySet = BTreeSet::new();
    keys.insert("cell:001".to_string());
    keys.insert("config:version".to_string());

    let retrieved_data = sdl_client.get(namespace, &keys)?;
    for (key, value) in retrieved_data.iter() {
        println!("Key: {}, Value: {:?}", key, String::from_utf8_lossy(value));
    }

    // List all keys matching a pattern
    let pattern = "cell:*";
    let matching_keys = sdl_client.list_keys(namespace, pattern)?;
    println!("Keys matching '{}': {:?}", pattern, matching_keys);

    // Conditional delete
    let deleted = sdl_client.delete_if(namespace, "cell:002", b"inactive")?;
    println!("Conditional delete successful: {}", deleted);

    // Working with groups (sets)
    sdl_client.add_member(namespace, "active_cells", b"cell:001")?;
    sdl_client.add_member(namespace, "active_cells", b"cell:003")?;

    let members = sdl_client.get_members(namespace, "active_cells")?;
    println!("Active cells group members: {} items", members.len());

    // Clean up
    sdl_client.delete(&mut keys)?;
    sdl_client.del_group(namespace, "active_cells")?;

    Ok(())
}

```

--------------------------------

### Register xApp Instance with RIC Application Manager in Rust

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Demonstrates how to register an xApp instance with the RIC platform's Application Manager. It sets up necessary environment variables, configures the xApp, waits for RMR readiness, performs the registration, and then deregisters before shutdown. Requires the 'xapp' crate.

```rust
use xapp::{XApp, XAppConfig, ConfigMetadata};
use std::sync::mpsc;
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Set up required environment variables for registration
    // These are typically set by Kubernetes in the deployment environment
    std::env::set_var("SERVICE_RICXAPP_MY_XAPP_HTTP_SERVICE_HOST", "my-xapp-service");
    std::env::set_var("SERVICE_RICXAPP_MY_XAPP_HTTP_SERVICE_PORT", "8080");
    std::env::set_var("SERVICE_RICXAPP_MY_XAPP_RMR_SERVICE_HOST", "my-xapp-service");
    std::env::set_var("SERVICE_RICXAPP_MY_XAPP_RMR_SERVICE_PORT", "4560");

    // Create xApp configuration
    let config = XAppConfig {
        metadata: Box::new(ConfigMetadata {
            xapp_name: "my-xapp".to_string(),
            config_type: "json".to_string(),
        }),
        config: json!({
            "messaging": {
                "ports": [
                    {"name": "rmrdata", "port": 4560},
                    {"name": "http", "port": 8080}
                ]
            }
        }),
    };

    let (app_tx, _app_rx) = mpsc::channel();
    let mut xapp = XApp::from_config(config, app_tx)?;

    // Wait for RMR to be ready
    while !xapp.is_rmr_ready() {
        std::thread::sleep(std::time::Duration::from_millis(100));
    }

    // Register with App Manager
    let app_config_json = json!({
        "version": "1.0",
        "features": ["monitoring", "control"]
    }).to_string();

    match xapp.register_xapp(
        "my-xapp",                    // xApp name
        "my-xapp-instance-001",       // xApp instance name
        &app_config_json,             // Configuration JSON
        Some("ricxapp")               // Namespace (optional, defaults to "ricxapp")
    ) {
        Ok(_) => println!("XApp registered successfully"),
        Err(e) => eprintln!("Registration failed: {}", e),
    }

    // Start the xApp
    xapp.start();

    // Application runs...
    std::thread::sleep(std::time::Duration::from_secs(60));

    // Deregister before shutdown
    match xapp.deregister_xapp() {
        Ok(_) => println!("XApp deregistered successfully"),
        Err(e) => eprintln!("Deregistration failed: {}", e),
    }

    xapp.stop();
    xapp.join();

    Ok(())
}

```

--------------------------------

### Access RNIB Data using SDL Interface in Rust

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

This Rust code snippet demonstrates how to access data from the RAN Information Base (RNIB) using the SDL interface. It sets up the environment for an SDL connection and then retrieves all NodeB identities, printing their inventory names and global IDs. Requires the 'xapp' and 'rnib' crates.

```rust
use xapp::{XApp, XAppConfig, ConfigMetadata};
use rnib::entities::NbIdentity;
use std::sync::mpsc;
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Set up environment for SDL connection
    std::env::set_var("DBAAS_SERVICE_HOST", "localhost");
    std::env::set_var("DBAAS_SERVICE_PORT", "6379");

    // Create xApp instance
    let config = XAppConfig {
        metadata: Box::new(ConfigMetadata {
            xapp_name: "rnib-reader".to_string(),
            config_type: "json".to_string(),
        }),
        config: json!({
            "messaging": {
                "ports": [
                    {"name": "rmrdata", "port": 4560},
                    {"name": "http", "port": 8080}
                ]
            }
        }),
    };

    let (app_tx, _app_rx) = mpsc::channel();
    let xapp = XApp::from_config(config, app_tx)?;

    // Retrieve all NodeB identities from RNIB
    match xapp.rnib_get_nodeb_ids() {
        Ok(nodeb_ids) => {
            println!("Found {} NodeB entries", nodeb_ids.len());

            for nb_id in nodeb_ids.iter() {
                println!("NodeB Inventory Name: {}", nb_id.inventory_name);
                println!("  Global NB ID: {:?}", nb_id.global_nb_id);
            }
        },
        Err(e) => eprintln!("Failed to retrieve NodeB IDs: {}", e),
    }

    Ok(())
}

```

--------------------------------

### Rust: Initialize and Encode a Cell Protobuf Message

Source: https://github.com/thc1006/ric-plt-xapp-frame-rust/blob/master/rnib/README.md

Demonstrates how to use the rnib crate to create an instance of the Cell protobuf message and encode it. This requires the 'rnib' crate to be added as a dependency.

```rust
use rnib;

let cell = rnib::entitities::Cell::new();
let _ = cell.encode();

```

--------------------------------

### Manage Alarms with RIC Platform (Rust)

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Demonstrates how to raise and clear alarms using the RIC platform's Alarm Manager in Rust. It requires the 'xapp' and 'chrono' crates. The function takes an 'xapp::XApp' instance and returns a Result indicating success or failure.

```rust
use xapp::{Alarm, AlarmSeverity};
use chrono::Utc;

fn handle_critical_event(xapp: &xapp::XApp) -> Result<(), Box<dyn std::error::Error>> {
    // Create an alarm for a critical event
    let alarm = Alarm {
        alarm_id: Some(8001),
        alarm_text: Some("Cell 001 signal strength below threshold".to_string()),
        specific_problem: Some("Low signal strength detected".to_string()),
        perceived_severity: Some(AlarmSeverity::Major),
        identified_problem: Some("SIGNAL_STRENGTH_LOW".to_string()),
        additional_info: Some("Cell ID: 001, RSSI: -95dBm".to_string()),
        alarm_time: Some(Utc::now().timestamp() as u64),
    };

    // Raise the alarm (sends to Alarm Manager)
    match xapp.raise_alarm(&alarm) {
        Ok(_) => println!("Alarm raised successfully"),
        Err(e) => eprintln!("Failed to raise alarm: {}", e),
    }

    // Clear the alarm when issue is resolved
    let clear_alarm = Alarm {
        alarm_id: Some(8001),
        alarm_text: Some("Cell 001 signal strength recovered".to_string()),
        perceived_severity: Some(AlarmSeverity::Cleared),
        ..alarm
    };

    match xapp.clear_alarm(&clear_alarm) {
        Ok(_) => println!("Alarm cleared successfully"),
        Err(e) => eprintln!("Failed to clear alarm: {}", e),
    }

    Ok(())
}

```

--------------------------------

### RMR Message Buffer Operations in Rust

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Illustrates the creation, modification, and sending of RMR message buffers in Rust. It covers client initialization, payload preparation, setting message properties, and sending/receiving messages.

```rust
use rmr::{RMRClient, RMRMessageBuffer};
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Initialize RMR client
    let client = RMRClient::new("4560", RMRClient::RMR_MAX_RCV_BYTES, RMRClient::RMRFL_NONE)?;

    // Allocate a new message buffer
    let mut msg_buffer = RMRMessageBuffer::new(&client);

    // Prepare JSON payload
    let payload_data = json!({
        "event": "cell_update",
        "cell_id": "001",
        "status": "active",
        "timestamp": 1234567890
    });
    let payload_bytes = serde_json::to_vec(&payload_data)?;

    // Set message properties
    msg_buffer.set_mtype(10000); // Message type identifier
    msg_buffer.set_payload(&payload_bytes);

    // Check message properties
    println!("Message type: {}", msg_buffer.get_msgtype());
    println!("Payload size: {}", msg_buffer.get_length());
    println!("Max payload size: {}", msg_buffer.get_payload_size());
    println!("Message state: {}", msg_buffer.get_state());

    // Send message back to sender (rts_msg)
    match client.rts_msg(&msg_buffer) {
        Ok(_) => println!("Message sent successfully"),
        Err(e) => eprintln!("Failed to send message: {:?}", e),
    }

    // Receive a message (blocking)
    let recv_buffer = client.alloc_msg()?;
    let received = client.rcv_msg(recv_buffer)?;

    // Create message buffer from received pointer
    let received_msg = unsafe {
        RMRMessageBuffer::from_buf(received, (*received).mtype)
    };

    println!("Received payload: {:?}", received_msg.get_payload());

    // Free message buffer when done
    msg_buffer.free();

    Ok(())
}

```

--------------------------------

### Configure RMR Client for Synchronous and Threaded Operation (Rust)

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Initializes an RMR client using the 'rmr' crate, demonstrating both synchronous (NOTHREAD flag) and threaded (default flags) operation. It involves setting environment variables for routing and retrieving the receive file descriptor for potential epoll integration. The function returns a Result indicating success or failure.

```rust
use rmr::RMRClient;
use std::env;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Set up static routing table via environment variable
    env::set_var("RMR_SEED_RT", "./test_route.rt");

    // Initialize with NOTHREAD flag for synchronous operation
    let client_sync = RMRClient::new(
        "4560",
        RMRClient::RMR_MAX_RCV_BYTES,
        RMRClient::RMRFL_NOTHREAD
    )?;

    println!("Synchronous client ready: {}", client_sync.is_ready());

    // Get the receive file descriptor for epoll integration
    match client_sync.get_recv_fd() {
        Ok(fd) => println!("Receiver FD: {}", fd),
        Err(e) => eprintln!("Failed to get recv fd: {:?}", e),
    }

    // Initialize with default flags for threaded operation
    let client_threaded = RMRClient::new(
        "4561",
        RMRClient::RMR_MAX_RCV_BYTES,
        RMRClient::RMRFL_NONE
    )?;

    // Wait for route table to be loaded
    loop {
        if client_threaded.is_ready() {
            println!("Threaded client ready!");
            break;
        }
        std::thread::sleep(std::time::Duration::from_millis(100));
    }

    Ok(())
}

```

--------------------------------

### Process RMR Messages with Handlers in Rust

Source: https://context7.com/thc1006/ric-plt-xapp-frame-rust/llms.txt

Sets up an RMR client, receiver, and processor to handle incoming RMR messages. It demonstrates registering a specific handler for message type 60000, which responds with a "pong" message.

```rust
use rmr::{RMRClient, RMRMessageBuffer, RMRProcessor, RMRReceiver, RMRError};
use std::sync::{Arc, Mutex, mpsc};
use std::sync::atomic::{AtomicBool, Ordering};

// Define a handler function for message type 60000
fn handle_ping_message(
    msg: &mut RMRMessageBuffer,
    client: &RMRClient,
    _sender: mpsc::Sender<()>, // This sender is not used in this example
) -> Result<(), RMRError> {
    // Parse incoming payload as JSON
    let payload = msg.get_payload();
    println!("Received ping: {:?}", payload);

    // Prepare response payload
    let response = br#"{"status": "pong"}"#;
    msg.set_payload(response);
    msg.set_mtype(60001);

    // Send response back to sender
    client.rts_msg(msg)?;

    Ok(())
}

fn main() -> Result<(), std::io::Error> {
    // Create communication channels
    let (data_tx, data_rx) = mpsc::channel();
    let (app_tx, _app_rx) = mpsc::channel(); // This sender is not used in this example

    // Initialize RMR client on port 4562
    let rmr_client = Arc::new(Mutex::new(
        RMRClient::new("4562", RMRClient::RMR_MAX_RCV_BYTES, RMRClient::RMRFL_NONE)?
    ));

    // Create atomic flag for controlling execution
    let is_running = Arc::new(AtomicBool::new(true));

    // Set up receiver for incoming RMR messages
    let receiver = RMRReceiver::new(
        Arc::clone(&rmr_client),
        data_tx,
        Arc::clone(&is_running)
    );
    let receiver_thread = RMRReceiver::start(Arc::new(Mutex::new(receiver)));

    // Set up processor with message handlers
    let mut processor = RMRProcessor::new(
        data_rx,
        Arc::clone(&rmr_client),
        Arc::clone(&is_running),
        app_tx
    );

    // Register handler for message type 60000
    processor.register_processor(60000, handle_ping_message);
    let processor_thread = RMRProcessor::start(Arc::new(Mutex::new(processor)));

    // Run for 30 seconds
    std::thread::sleep(std::time::Duration::from_secs(30));

    // Graceful shutdown
    is_running.store(false, Ordering::Relaxed);
    let _ = receiver_thread.join();
    let _ = processor_thread.join();

    Ok(())
}

```

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