added inital server communcation task

WatcherAgent/src/api.rs

@@ -1,16 +1,15 @@
-use crate::serverclientcomm::handle_server_message;
-
 use std::time::Duration;
 
 use crate::hardware::HardwareInfo;
-use crate::models::{HeartbeatDto, IdResponse, MetricDto, RegistrationDto};
+use crate::models::{HeartbeatDto, IdResponse, MetricDto, RegistrationDto, ServerMessage, Acknowledgment};
+use crate::serverclientcomm::handle_server_message;
+
 use anyhow::Result;
 use reqwest::{Client, StatusCode};
 use std::error::Error;
 use tokio::time::sleep;
 
 use bollard::Docker;
-use crate::models::ServerMessage;
 
 pub async fn register_with_server(
     base_url: &str,
@@ -159,24 +158,84 @@ pub async fn send_metrics(
     Ok(())
 }
 
-pub async fn listening_to_server(docker: &Docker, base_url: &str) -> Result<(), Box<dyn Error + Send + Sync>>{
+pub async fn listening_to_server(docker: &Docker, base_url: &str) -> Result<(), Box<dyn Error + Send + Sync>> {
     let url = format!("{}/api/message", base_url);
+    let client = reqwest::Client::new();
+    
     loop {
-        // Replace with your server endpoint
-        let resp = reqwest::get(&url)
-            .await;
+        // Get message from server
+        let resp = client.get(&url).send().await;
 
-        if let Ok(resp) = resp {
-            if let Ok(msg) = resp.json::<ServerMessage>().await {
-                handle_server_message(docker, msg).await;
-            } else {
-                eprintln!("Failed to parse message");
+        match resp {
+            Ok(response) => {
+                if response.status().is_success() {
+                    match response.json::<ServerMessage>().await {
+                        Ok(msg) => {
+                            // Acknowledge receipt immediately
+                            if let Err(e) = send_acknowledgment(&client, base_url, &msg.message_id, "received", "Message received successfully").await {
+                                eprintln!("Failed to send receipt acknowledgment: {}", e);
+                            }
+                            
+                            // Handle the message
+                            let result = handle_server_message(docker, msg.clone()).await;
+                            
+                            // Send execution result acknowledgment
+                            let (status, details) = match result {
+                                Ok(_) => ("success", "Message executed successfully".to_string()),
+                                Err(e) => ("error", format!("Execution failed: {}", e)),
+                            };
+                            
+                            if let Err(e) = send_acknowledgment(&client, base_url, &msg.message_id, status, &details).await {
+                                eprintln!("Failed to send execution acknowledgment: {}", e);
+                            }
+                        }
+                        Err(e) => {
+                            eprintln!("Failed to parse message: {}", e);
+                        }
+                    }
+                } else if response.status() == reqwest::StatusCode::NO_CONTENT {
+                    // No new messages, continue polling
+                    println!("No new messages from server");
+                } else {
+                    eprintln!("Server returned error status: {}", response.status());
+                }
+            }
+            Err(e) => {
+                eprintln!("Failed to reach server: {}", e);
             }
-        } else {
-            eprintln!("Failed to reach server");
         }
 
         // Poll every 5 seconds (or use WebSocket for real-time)
         sleep(Duration::from_secs(5)).await;
     }
+}
+
+async fn send_acknowledgment(
+    client: &reqwest::Client,
+    base_url: &str,
+    message_id: &str,
+    status: &str,
+    details: &str,
+) -> Result<(), Box<dyn Error + Send + Sync>> {
+    let ack_url = format!("{}/api/acknowledge", base_url);
+    
+    let acknowledgment = Acknowledgment {
+        message_id: message_id.to_string(),
+        status: status.to_string(),
+        details: details.to_string(),
+    };
+    
+    let response = client
+        .post(&ack_url)
+        .json(&acknowledgment)
+        .send()
+        .await?;
+    
+    if response.status().is_success() {
+        println!("Acknowledgment sent successfully for message {}", message_id);
+    } else {
+        eprintln!("Server returned error for acknowledgment: {}", response.status());
+    }
+    
+    Ok(())
 }

WatcherAgent/src/main.rs

@@ -13,6 +13,9 @@ use std::marker::Send;
 use std::marker::Sync;
 use std::result::Result;
 use tokio::task::JoinHandle;
+use bollard::Docker;
+
+use crate::serverclientcomm::{get_current_image};
 
 async fn flatten<T>(
     handle: JoinHandle<Result<T, Box<dyn Error + Send + Sync>>>,
@@ -26,14 +29,26 @@ async fn flatten<T>(
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error + Send + Sync>> {
-    let args: Vec<String> = env::args().collect();
+    // Initialize Docker client
+    let docker = Docker::connect_with_local_defaults()
+        .map_err(|e| format!("Failed to connect to Docker: {}", e))?;
 
+    // Get current image version
+    let client_version = match get_current_image(&docker).await {
+        Ok(version) => version.unwrap(),
+        Err(e) => {
+            eprintln!("Warning: Could not get current image version: {}", e);
+            "unknown".to_string()
+        }
+    };
+    println!("Client Version: {}", client_version);
+
+    let args: Vec<String> = env::args().collect();
     // args[0] is the binary name, args[1] is the first actual argument
     if args.len() < 2 {
         eprintln!("Usage: {} <server-url>", args[0]);
         return Err("Missing server URL argument".into());
     }
-
     let server_url = &args[1];
     println!("Server URL: {:?}", server_url);
 
@@ -47,6 +62,13 @@ async fn main() -> Result<(), Box<dyn Error + Send + Sync>> {
     };
 
     // Start background tasks
+    // Start server listening for commands
+    let listening_handle = tokio::spawn({
+        let docker = docker.clone();
+        let server_url = server_url.to_string();
+        async move { api::listening_to_server(&docker, &server_url).await }
+    });
+
     // Start heartbeat in background
     let heartbeat_handle = tokio::spawn({
         let ip = ip.clone();
@@ -65,14 +87,16 @@ async fn main() -> Result<(), Box<dyn Error + Send + Sync>> {
         }
     });
 
-    // Warte auf beide Tasks und prüfe explizit auf Fehler
-    let (heartbeat_handle, metrics_handle) =
-        tokio::try_join!(flatten(heartbeat_handle), flatten(metrics_handle))?;
+    // Wait for all tasks and check for errors
+    let (listening_result, heartbeat_result, metrics_result) = tokio::try_join!(
+        flatten(listening_handle),
+        flatten(heartbeat_handle),
+        flatten(metrics_handle)
+    )?;
 
-    let (heartbeat, metrics) = (heartbeat_handle, metrics_handle);
     println!(
-        "All tasks completed successfully: {:?}, {:?}.",
-        heartbeat, metrics
+        "All tasks completed: listening={:?}, heartbeat={:?}, metrics={:?}",
+        listening_result, heartbeat_result, metrics_result
     );
 
     println!("All tasks completed successfully.");

WatcherAgent/src/models.rs

@@ -73,11 +73,17 @@ pub struct HardwareDto {
     pub ip_address: String,
 }
 
-#[derive(Debug, Deserialize)]
-#[serde(tag = "command", content = "data")]
-pub enum ServerMessage {
-    Update(String),
-    Restart,
-    #[serde(other)]
-    Unknown,
+#[derive(Debug, Deserialize, Clone)]
+pub struct ServerMessage {
+    // Define your message structure here
+    pub message_type: String,
+    pub data: serde_json::Value,
+    pub message_id: String, // Add an ID for acknowledgment
+}
+
+#[derive(Debug, Serialize, Clone)]
+pub struct Acknowledgment {
+    pub message_id: String,
+    pub status: String, // "success" or "error"
+    pub details: String,
 }

WatcherAgent/src/serverclientcomm.rs

@@ -1,26 +1,46 @@
-use crate::models::ServerMessage;
+use crate::models::{ServerMessage};
+
+use std::error::Error;
 
 use bollard::Docker;
 use bollard::query_parameters::{CreateImageOptions, RestartContainerOptions, InspectContainerOptions};
 use futures_util::StreamExt;
 
-pub fn parse_message(raw: &str) -> ServerMessage {
-    match raw {
-        "restart" => ServerMessage::Restart,
-        msg if msg.starts_with("update:") => ServerMessage::Update(msg[7..].to_string()),
-        _ => ServerMessage::Unknown,
+pub async fn handle_server_message(docker: &Docker, msg: ServerMessage) -> Result<(), Box<dyn Error + Send + Sync>> {
+    let msg = msg.clone();
+    println!("Handling server message: {:?}", msg);
+
+    // Handle different message types
+    match msg.message_type.as_str() {
+        "update_image" => {
+            if let Some(image_name) = msg.data.get("image").and_then(|v| v.as_str()) {
+                println!("Received update command for image: {}", image_name);
+                // Call your update_docker_image function here
+                update_docker_image(docker, image_name).await?;
+                Ok(())
+            } else {
+                Err("Missing image name in update message".into())
+            }
+        }
+        "restart_container" => {
+            println!("Received restart container command");
+            // Call your restart_container function here
+            restart_container(docker).await?;
+            Ok(())
+        }
+        "stop_agent" => {
+            println!("Received stop agent command");
+            // Implement graceful shutdown
+            std::process::exit(0);
+        }
+        _ => {
+            eprintln!("Unknown message type: {}", msg.message_type);
+            Err(format!("Unknown message type: {}", msg.message_type).into())
+        }
     }
 }
 
-pub async fn handle_server_message(docker: &Docker, msg: ServerMessage) {
-    match msg {
-        ServerMessage::Update(version) => update_docker_image(docker, &version).await,
-        ServerMessage::Restart => restart_container(docker).await,
-        ServerMessage::Unknown => eprintln!("Unknown message"),
-    }
-}
-
-pub async fn update_docker_image(docker: &Docker, image: &str) {
+pub async fn update_docker_image(docker: &Docker, image: &str) -> Result<(), Box<dyn Error + Send + Sync>> {
     println!("Updating to {}", image);
 
     // 1. Pull new image
@@ -49,10 +69,12 @@ pub async fn update_docker_image(docker: &Docker, image: &str) {
     }
 
     // 2. Restart the current container
-    restart_container(docker).await;
+    let _ = restart_container(docker).await;
+
+    Ok(())
 }
 
-pub async fn get_current_image(docker: &Docker) -> Option<String> {
+pub async fn get_current_image(docker: &Docker) -> Result<Option<String>, Box<dyn Error + Send + Sync>> {
     // Get the current container ID from /proc/self/cgroup
     let container_id = match std::fs::read_to_string("/proc/self/cgroup") {
         Ok(content) => {
@@ -68,7 +90,7 @@ pub async fn get_current_image(docker: &Docker) -> Option<String> {
         }
         Err(e) => {
             eprintln!("Error reading cgroup file: {}", e);
-            return None;
+            return Ok(None);
         }
     };
 
@@ -76,23 +98,23 @@ pub async fn get_current_image(docker: &Docker) -> Option<String> {
         Some(id) => id,
         None => {
             eprintln!("Could not find container ID in cgroup");
-            return None;
+            return Ok(None);
         }
     };
 
     // Inspect the current container to get its image
     match docker.inspect_container(&container_id, None::<InspectContainerOptions>).await {
         Ok(container_info) => {
-            container_info.config.map(|config| config.image.unwrap_or_else(|| "unknown".to_string()))
+            Ok(container_info.config.map(|config| config.image.unwrap_or_else(|| "unknown".to_string())))
         }
         Err(e) => {
             eprintln!("Error inspecting container: {}", e);
-            None
+            Ok(None)
         }
     }
 }
 
-pub async fn restart_container(docker: &Docker) {
+pub async fn restart_container(docker: &Docker) -> Result<(), Box<dyn Error + Send + Sync>> {
     if let Ok(container_id) = std::env::var("HOSTNAME") {
         println!("Restarting container {}", container_id);
         if let Err(e) = docker.restart_container(&container_id, Some(RestartContainerOptions { signal: None, t: Some(0) }))
@@ -103,4 +125,6 @@ pub async fn restart_container(docker: &Docker) {
     } else {
         eprintln!("No container ID found (HOSTNAME not set?)");
     }
+
+    Ok(())
 }