refactor code and add debug and trace logger

Cargo.lock

@@ -87,6 +87,17 @@ dependencies = [
  "os_str_bytes",
 ]
 
+[[package]]
+name = "colored"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3616f750b84d8f0de8a58bda93e08e2a81ad3f523089b05f1dffecab48c6cbd"
+dependencies = [
+ "atty",
+ "lazy_static",
+ "winapi",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.11.2"
@@ -236,9 +247,22 @@ dependencies = [
  "clap",
  "libloading",
  "log",
+ "simple_logger",
  "tokio",
 ]
 
+[[package]]
+name = "simple_logger"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c75a9723083573ace81ad0cdfc50b858aa3c366c48636edb4109d73122a0c0ea"
+dependencies = [
+ "atty",
+ "colored",
+ "log",
+ "winapi",
+]
+
 [[package]]
 name = "strsim"
 version = "0.10.0"
@@ -280,6 +304,18 @@ dependencies = [
  "num_cpus",
  "once_cell",
  "pin-project-lite",
+ "tokio-macros",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b557f72f448c511a979e2564e55d74e6c4432fc96ff4f6241bc6bded342643b7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]

Cargo.toml

@@ -11,5 +11,6 @@ anyhow = "1.0.57"
 async-trait = "0.1.56"
 clap = { version = "3.1.18", features = ["derive"] }
 libloading = "0.7.3"
-log = "0.4.17"
+log = { version = "0.4.17", features = ["release_max_level_info", "max_level_trace"] }
-tokio = { version = "1.19.0", features = ["rt-multi-thread"] }
+simple_logger = { version = "2.1.0", default-features = false, features = ["colors"] }
+tokio = { version = "1.19.0", features = ["rt-multi-thread", "macros"] }

plugin_test/src/lib.rs

@@ -1,6 +1,7 @@
 use async_trait::async_trait;
 use servers::{
-    tcp::Client, Command, CommandManagerType, CommandRegistrar, Plugin, PluginRegistrar,
+    plugins::{Command, CommandManagerType, CommandRegistrar, Plugin, PluginRegistrar},
+    tcp::Client,
 };
 
 struct PluginTest;

src/command_handler.rs

@@ -1,36 +0,0 @@
-use std::{any::Any, sync::Arc};
-
-use async_trait::async_trait;
-
-use crate::tcp::Client;
-
-#[async_trait]
-pub trait Command: Any + Send + Sync {
-    /// Command name
-    fn name(&self) -> &'static str;
-    /// Help message of this command
-    fn help(&self) -> &'static str;
-    /// Command function
-    async fn execute(&self, client: &mut Client, args: Vec<&str>, commands: &CommandManagerType);
-}
-
-pub struct CommandManager {
-    /// Vector with plugins
-    pub commands: Vec<Box<dyn Command>>,
-}
-
-impl CommandManager {
-    pub fn new() -> Self {
-        Self {
-            commands: Vec::new(),
-        }
-    }
-}
-
-impl Default for CommandManager {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-pub type CommandManagerType = Arc<Vec<Box<dyn Command>>>;

src/commands/help.rs

@@ -1,6 +1,9 @@
 use async_trait::async_trait;
 
-use crate::{command_handler::Command, tcp::Client, CommandManagerType};
+use crate::{
+    plugins::{Command, CommandManagerType},
+    tcp::Client,
+};
 
 pub struct CommandHelp;
 
@@ -14,8 +17,13 @@ impl Command for CommandHelp {
         "show help"
     }
 
-    async fn execute(&self, client: &mut Client, _args: Vec<&str>, commands: &CommandManagerType) {
+    async fn execute(
-        for command in commands.iter() {
+        &self,
+        client: &mut Client,
+        _args: Vec<&str>,
+        command_manager: &CommandManagerType,
+    ) {
+        for command in command_manager.commands.iter() {
             client
                 .send(&format!("{} - {}", command.name(), command.help()))
                 .await

src/commands/mod.rs

@@ -1,15 +1,9 @@
-#![allow(clippy::vec_init_then_push)]
-
 mod help;
 
 pub use help::*;
 
-use crate::command_handler::Command;
+use crate::plugins::Command;
 
 pub fn register_commands() -> Vec<Box<dyn Command>> {
-    let mut commands: Vec<Box<dyn Command>> = Vec::new();
+    vec![Box::new(CommandHelp)]
-
-    commands.push(Box::new(CommandHelp));
-
-    commands
 }

src/lib.rs

@@ -1,8 +1,3 @@
-mod command_handler;
+pub mod commands;
-mod commands;
+pub mod plugins;
-mod plugin_loader;
-
-pub use command_handler::*;
-pub use plugin_loader::*;
-
 pub mod tcp;

src/main.rs

@@ -1,5 +1,6 @@
 use clap::Parser;
 use servers::tcp;
+use simple_logger::SimpleLogger;
 
 #[derive(Parser)]
 #[clap(
@@ -26,6 +27,9 @@ struct Cli {
 }
 
 fn main() -> anyhow::Result<()> {
+    SimpleLogger::new().init()?;
+
+    // parse cli args
     let cli = Cli::parse();
 
     // start tcp server

src/plugins/loader.rs

@@ -4,7 +4,7 @@ use async_trait::async_trait;
 use libloading::{Library, Symbol};
 use log::{debug, trace};
 
-use crate::{commands, Command, CommandManager, CommandManagerType};
+use crate::{commands, tcp::Client};
 
 /// A plugin which allows you to add extra functionality.
 #[async_trait]
@@ -20,7 +20,6 @@ pub trait Plugin: Any + Send + Sync {
 }
 
 pub struct PluginManager {
-    /// Vector with loaded plugins
     pub plugins: Vec<Box<dyn Plugin>>,
 }
 
@@ -31,17 +30,6 @@ impl PluginManager {
             plugins: Vec::new(),
         }
     }
-
-    /// Unload all plugins and loaded plugin libraries, making sure to fire
-    /// their `on_plugin_unload()` methods so they can do any necessary cleanup.
-    pub async fn unload(&mut self) {
-        debug!("Unloading plugins");
-
-        for plugin in self.plugins.drain(..) {
-            trace!("Firing on_plugin_unload for {:?}", plugin.name());
-            plugin.on_plugin_unload().await;
-        }
-    }
 }
 
 impl Default for PluginManager {
@@ -60,6 +48,42 @@ impl PluginRegistrar for PluginManager {
     }
 }
 
+#[async_trait]
+pub trait Command: Any + Send + Sync {
+    /// Command name
+    fn name(&self) -> &'static str;
+    /// Help message of this command
+    fn help(&self) -> &'static str;
+    /// Command function
+    async fn execute(
+        &self,
+        client: &mut Client,
+        args: Vec<&str>,
+        command_manager: &CommandManagerType,
+    );
+}
+
+pub struct CommandManager {
+    /// Vector with plugins
+    pub commands: Vec<Box<dyn Command>>,
+}
+
+impl CommandManager {
+    pub fn new() -> Self {
+        Self {
+            commands: Vec::new(),
+        }
+    }
+}
+
+pub type CommandManagerType = Arc<CommandManager>;
+
+impl Default for CommandManager {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 pub trait CommandRegistrar {
     fn register_plugin(&mut self, command: Box<dyn Command>);
 }
@@ -70,9 +94,7 @@ impl CommandRegistrar for CommandManager {
     }
 }
 
-pub type PluginManagerType = Arc<Vec<Box<dyn Plugin>>>;
+pub fn loader() -> anyhow::Result<(Arc<CommandManager>, Arc<PluginManager>)> {
-
-pub fn loader() -> anyhow::Result<(PluginManagerType, CommandManagerType)> {
     // get path to .so lib from command argument
     let config_dir = "./plugins";
     let paths = fs::read_dir(config_dir)?;
@@ -93,33 +115,28 @@ pub fn loader() -> anyhow::Result<(PluginManagerType, CommandManagerType)> {
         // get library file path
         let path = path?.path();
 
+        let plugin_path = path.to_str().unwrap_or("unknown");
+
+        // log debug info
+        debug!("Loading plugin `{}`", plugin_path);
+
         // loading library with .so is unsafe
         unsafe {
             // load library
             // Box::new and Box::leak must be there because if it isn't there it throws a segmentation fault
-            let lib = Box::leak(Box::new(Library::new(path)?));
+            let lib = Box::leak(Box::new(Library::new(&path)?));
 
             // get `plugin_entry` from library
+            trace!("Finding symbol `plugin_entry` in `{}`", plugin_path);
             let func: Symbol<
                 unsafe extern "C" fn(&mut dyn PluginRegistrar, &mut dyn CommandRegistrar) -> (),
             > = lib.get(b"plugin_entry")?;
 
-            // execute initial function
+            // execute initial plugin function
+            trace!("Running `plugin_entry(...)` in plugin `{}`", plugin_path);
             func(&mut plugin_manager, &mut command_manager);
         }
     }
 
-    // create Arc in Vector
+    Ok((Arc::new(command_manager), Arc::new(plugin_manager)))
-    let mut commands = Vec::new();
-    for command in command_manager.commands {
-        commands.push(command)
-    }
-
-    // create Arc in Vector
-    let mut plugins = Vec::new();
-    for plugin in plugin_manager.plugins {
-        plugins.push(plugin)
-    }
-
-    Ok((Arc::new(plugins), Arc::new(commands)))
 }

src/plugins/mod.rs

@@ -0,0 +1,3 @@
+mod loader;
+
+pub use loader::*;

src/tcp/handle_connection.rs

@@ -1,6 +1,8 @@
 use std::io::Write;
 
-use crate::CommandManagerType;
+use log::trace;
+
+use crate::plugins::CommandManagerType;
 
 use super::Client;
 
@@ -21,10 +23,11 @@ pub async fn handle_connection(
         let cmd = args[0];
 
         // search if a command exists
-        for command in commands.iter() {
+        for command in commands.commands.iter() {
             // if this is the entered command
             if cmd == command.name() {
                 // execute command
+                trace!("Executing a command `{}`", command.name());
                 command
                     .execute(&mut client, args[1..args.len()].to_vec(), &commands)
                     .await;

src/tcp/start.rs

@@ -1,27 +1,28 @@
 use std::net::TcpListener;
 
 use crate::{
-    loader,
+    plugins::loader,
     tcp::{handle_connection, Client},
 };
 
-pub fn start_server(host: &str, port: &str) -> anyhow::Result<()> {
+#[tokio::main]
+pub async fn start_server(host: &str, port: &str) -> anyhow::Result<()> {
     // listen Tcp server
     let listener = TcpListener::bind(format!("{host}:{port}"))?;
 
     println!("Tcp server started at: {}", listener.local_addr()?);
 
     // load plugins and commands
-    let (_plugin_manager, commands_manager) = loader()?;
+    let (command_manager, _plugin_manager) = loader()?;
 
     // Accepts a new incoming connection from this listener.
     while let Ok((stream, _address)) = listener.accept() {
         let client = Client::new(stream);
 
-        let commands_manager = commands_manager.clone();
+        let command_manager = command_manager.clone();
 
         // handle client connection in new thread
-        tokio::spawn(handle_connection(client, commands_manager));
+        tokio::spawn(handle_connection(client, command_manager));
     }
 
     Ok(())