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_archive/service_manager/examples/service_spaghetti.rs

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+//! service_spaghetti - An example of messy service management.
+//!
+//! This example demonstrates how the service manager behaves when commands
+//! are issued in a less-than-ideal order, such as starting a service that's
+//! already running or removing a service that hasn't been stopped.
+
+use sal_service_manager::{create_service_manager, ServiceConfig};
+use std::collections::HashMap;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    // Initialize logging to see socket discovery in action
+    env_logger::init();
+
+    let manager = match create_service_manager() {
+        Ok(manager) => manager,
+        Err(e) => {
+            eprintln!("Error: Failed to create service manager: {}", e);
+            return;
+        }
+    };
+    let service_name = "com.herocode.examples.spaghetti";
+
+    let service_config = ServiceConfig {
+        name: service_name.to_string(),
+        binary_path: "/bin/sh".to_string(),
+        args: vec![
+            "-c".to_string(),
+            "while true; do echo 'Spaghetti service is running...'; sleep 5; done".to_string(),
+        ],
+        working_directory: None,
+        environment: HashMap::new(),
+        auto_restart: false,
+    };
+
+    println!("--- Service Spaghetti Example ---");
+    println!("This example demonstrates messy, error-prone service management.");
+
+    // Cleanup from previous runs to ensure a clean slate
+    if let Ok(true) = manager.exists(service_name) {
+        println!(
+            "\nService '{}' found from a previous run. Cleaning up first.",
+            service_name
+        );
+        let _ = manager.stop(service_name);
+        let _ = manager.remove(service_name);
+        println!("Cleanup complete.");
+    }
+
+    // 1. Start the service (creates and starts in one step)
+    println!("\n1. Starting the service for the first time...");
+    match manager.start(&service_config) {
+        Ok(()) => println!("   -> Success: Service '{}' started.", service_name),
+        Err(e) => {
+            eprintln!(
+                "   -> Error: Failed to start service: {}. Halting example.",
+                e
+            );
+            return;
+        }
+    }
+
+    thread::sleep(Duration::from_secs(2));
+
+    // 2. Try to start the service again while it's already running
+    println!("\n2. Trying to start the *same service* again...");
+    match manager.start(&service_config) {
+        Ok(()) => println!("   -> Unexpected Success: Service started again."),
+        Err(e) => eprintln!(
+            "   -> Expected Error: {}. The manager should detect it is already running.",
+            e
+        ),
+    }
+
+    // 3. Let it run for a bit
+    println!("\n3. Letting the service run for 5 seconds...");
+    thread::sleep(Duration::from_secs(5));
+
+    // 4. Remove the service without stopping it first
+    // The `remove` function is designed to stop the service if it's running.
+    println!("\n4. Removing the service without explicitly stopping it first...");
+    match manager.remove(service_name) {
+        Ok(()) => println!("   -> Success: Service was stopped and removed."),
+        Err(e) => eprintln!("   -> Error: Failed to remove service: {}", e),
+    }
+
+    // 5. Try to stop the service after it has been removed
+    println!("\n5. Trying to stop the service that was just removed...");
+    match manager.stop(service_name) {
+        Ok(()) => println!("   -> Unexpected Success: Stopped a removed service."),
+        Err(e) => eprintln!(
+            "   -> Expected Error: {}. The manager knows the service is gone.",
+            e
+        ),
+    }
+
+    // 6. Try to remove the service again
+    println!("\n6. Trying to remove the service again...");
+    match manager.remove(service_name) {
+        Ok(()) => println!("   -> Unexpected Success: Removed a non-existent service."),
+        Err(e) => eprintln!(
+            "   -> Expected Error: {}. The manager correctly reports it's not found.",
+            e
+        ),
+    }
+
+    println!("\n--- Spaghetti Example Finished ---");
+}