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use serde::{Deserialize, Serialize}; |
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use std::{ |
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fs::File, |
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io::{BufRead, BufReader, Write}, |
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path::PathBuf, |
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process::{Child, Command, Stdio}, |
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}; |
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use uuid::Uuid; |
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|
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pub enum ServiceState { |
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Running, |
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Failed, |
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Stopped, |
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} |
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|
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#[derive(Serialize, Deserialize, Clone, Debug)] |
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pub struct ServiceConf { |
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uuid: Uuid, |
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name: String, |
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command: String, |
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args: Option<String>, |
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directory: Option<PathBuf>, |
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autostart: bool, |
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} |
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impl Default for ServiceConf { |
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fn default() -> Self { |
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Self::new() |
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} |
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} |
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impl ServiceConf { |
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/// Returns a new empty `ServiceConf` |
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pub fn new() -> Self { |
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Self { |
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uuid: Uuid::new_v4(), |
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name: String::new(), |
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command: String::new(), |
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args: None, |
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directory: None, |
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autostart: false, |
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} |
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} |
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/// Returns a new `ServiceConf` from parts. |
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pub fn from_parts( |
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uuid: Uuid, |
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name: String, |
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command: String, |
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args: Option<String>, |
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directory: Option<PathBuf>, |
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autostart: bool, |
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) -> Self { |
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Self { |
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uuid, |
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name, |
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command, |
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args, |
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directory, |
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autostart, |
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} |
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} |
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/// Returns a new `ServiceConf` from parts with new uuid. |
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pub fn new_from_parts( |
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name: String, |
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command: String, |
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args: Option<String>, |
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directory: Option<PathBuf>, |
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autostart: bool, |
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) -> Self { |
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Self { |
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uuid: Uuid::new_v4(), |
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name, |
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command, |
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args, |
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directory, |
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autostart, |
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} |
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} |
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/// Returns the `uuid::Uuid` associated with the service config |
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pub fn get_uuid(&self) -> &Uuid { |
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&self.uuid |
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} |
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/// Returns the name of the described service |
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pub fn get_name(&self) -> &str { |
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&self.name |
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} |
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/// Returns the command of the described service |
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pub fn get_command(&self) -> &str { |
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&self.command |
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} |
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/// Returns the args of the described service |
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pub fn get_args(&self) -> &Option<String> { |
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&self.args |
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} |
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/// Returns the work directory of the described service |
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pub fn get_work_dir(&self) -> &Option<PathBuf> { |
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&self.directory |
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} |
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/// Returns the autostart status of the described service |
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pub fn get_autostart(&self) -> bool { |
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self.autostart |
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} |
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/// Sets the name of the described service |
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pub fn name(&mut self, name: &str) -> &mut Self { |
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self.name = String::from(name); |
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self |
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} |
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/// Sets the command of the described service |
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pub fn command(&mut self, command: &str) -> &mut Self { |
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self.command = String::from(command); |
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self |
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} |
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/// Sets the args of the described service |
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pub fn args(&mut self, args: &Option<String>) -> &mut Self { |
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self.args = args.clone(); |
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self |
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} |
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/// Sets the work directory of the described service |
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pub fn work_dir(&mut self, work_dir: &Option<PathBuf>) -> &mut Self { |
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self.directory = work_dir.clone(); |
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self |
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} |
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/// Sets the autostart value of the described service |
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pub fn autostart(&mut self, autostart: bool) -> &mut Self { |
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self.autostart = autostart; |
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self |
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} |
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/// Builds a Service from this object |
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#[inline] |
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pub fn build(&self) -> Result<Service, Box<dyn std::error::Error>> { |
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Service::from_conf(&self) |
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} |
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} |
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|
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#[derive(Debug)] |
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pub struct Service { |
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conf: ServiceConf, |
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proc: Option<Child>, |
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pub outpath: Option<PathBuf>, |
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pub errpath: Option<PathBuf>, |
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} |
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impl Default for Service { |
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fn default() -> Self { |
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Self::new() |
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} |
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} |
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impl<'a> Service { |
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/// Returns a new empty `Service` |
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pub fn new() -> Self { |
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Self { |
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conf: ServiceConf::default(), |
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proc: None, |
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outpath: None, |
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errpath: None, |
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} |
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} |
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/// Returns a `Service` made from a `ServiceConf`. |
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pub fn from_conf(conf: &ServiceConf) -> Result<Self, Box<dyn std::error::Error>> { |
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let mut service = Self { |
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conf: conf.to_owned(), |
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proc: None, |
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outpath: None, |
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errpath: None, |
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}; |
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if conf.get_autostart() { |
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service.start()?; |
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} |
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Ok(service) |
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} |
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/// Gets the ServiceConf associated with the service |
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#[inline] |
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pub fn config(&self) -> &ServiceConf { |
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&self.conf |
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} |
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/// Returns the name of the service |
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#[inline] |
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pub fn name(&self) -> &str { |
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&self.config().get_name() |
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} |
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#[inline] |
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fn create_dirs(&self) -> Result<(), Box<dyn std::error::Error>> { |
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match std::fs::create_dir("./logs") { |
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Ok(_) => (), |
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Err(ref e) if e.kind() == std::io::ErrorKind::AlreadyExists => (), |
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Err(e) => return Err(Box::new(e)), |
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} |
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match std::fs::create_dir(format!("./logs/{}", &self.config().get_uuid())) { |
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Ok(_) => (), |
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Err(ref e) if e.kind() == std::io::ErrorKind::AlreadyExists => (), |
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Err(e) => return Err(Box::new(e)), |
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} |
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Ok(()) |
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} |
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/// Uses `tokio::process::Command` to start the service. |
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pub fn start(&mut self) -> Result<(), Box<dyn std::error::Error>> { |
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if self.proc.is_some() { |
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return Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::AlreadyExists, |
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"Process Already Exists", |
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))); |
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} |
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self.create_dirs()?; |
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let outpath = PathBuf::from(format!( |
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"./logs/{}/{}.log", |
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&self.config().get_uuid(), |
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&self.name() |
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)); |
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let errpath = PathBuf::from(format!( |
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"./logs/{}/{}.err", |
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&self.config().get_uuid(), |
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&self.name() |
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)); |
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let outfile = File::options().append(true).create(true).open(&outpath)?; |
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let errfile = File::options().append(true).create(true).open(&errpath)?; |
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let cmd = &self.conf.command; |
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let mut proc = Command::new(cmd); |
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proc.stdin(Stdio::piped()); |
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proc.stdout(outfile); |
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proc.stderr(errfile); |
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if let Some(a) = &self.conf.args { |
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proc.args(a.split_whitespace()); |
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}; |
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if let Some(c) = &self.conf.directory { |
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proc.current_dir(c); |
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}; |
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let child = proc.spawn()?; |
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self.proc = Some(child); |
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self.outpath = Some(outpath); |
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self.errpath = Some(errpath); |
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Ok(()) |
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} |
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/// Returns true when process is started and false when process is stopped. |
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pub fn started(&self) -> bool { |
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self.proc.is_some() |
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} |
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/// Returns the process id |
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pub fn id(&self) -> Result<u32, Box<dyn std::error::Error>> { |
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if let Some(proc) = self.proc.as_ref() { |
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Ok(proc.id()) |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"process not started", |
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))) |
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} |
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} |
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/// Returns the state of the service |
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pub fn state(&mut self) -> Result<ServiceState, Box<dyn std::error::Error>> { |
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if let Some(proc) = self.proc.as_mut() { |
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match proc.try_wait() { |
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Err(_) | Ok(Some(_)) => Ok(ServiceState::Failed), |
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Ok(None) => Ok(ServiceState::Running), |
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} |
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} else { |
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Ok(ServiceState::Stopped) |
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} |
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} |
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/// Invokes kill on the service process |
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pub fn stop(&mut self) -> Result<(), Box<dyn std::error::Error>> { |
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if let Some(proc) = self.proc.as_mut() { |
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proc.kill()?; |
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self.proc = None; |
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Ok(()) |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"No Process Associated with Service", |
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))) |
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} |
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} |
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/// Restarts service process |
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#[inline] |
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pub fn restart(&mut self) -> Result<(), Box<dyn std::error::Error>> { |
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self.stop()?; |
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self.start()?; |
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Ok(()) |
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} |
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/// Writes to the service process' stdin, if it exists. |
| 277 |
pub fn write_stdin(&mut self, buf: &str) -> Result<(), Box<dyn std::error::Error>> { |
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if let Some(proc) = self.proc.as_mut() { |
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let stdin = if let Some(stdin) = proc.stdin.as_mut() { |
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stdin |
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} else { |
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return Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"No stdin handle associated with process", |
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))); |
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}; |
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stdin.write(&buf.as_bytes())?; |
| 288 |
stdin.flush()?; |
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Ok(()) |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"No Process Associated with Service", |
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))) |
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} |
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} |
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/// Writes a line to the service process' stdin, if it exists. |
| 298 |
#[inline] |
| 299 |
pub fn writeln_stdin(&mut self, buf: &str) -> Result<(), Box<dyn std::error::Error>> { |
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self.write_stdin(&format!("{}\n", buf)) |
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} |
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} |
