trunk/src/service.rs

use serde::{Deserialize, Serialize};
use tokio::{
    io::{AsyncBufReadExt, AsyncWriteExt, BufReader},
    process::{Child, Command},
    sync::{
        Mutex,
        mpsc::{Receiver, channel},
    },
    task::spawn,
};

use std::{path::PathBuf, process::Stdio, sync::Arc};

#[derive(Serialize, Deserialize, Clone, Debug)]
pub struct ServiceConf {
    pub name: String,
    pub command: String,
    pub args: Option<String>,
    pub directory: Option<PathBuf>,
    pub autostart: bool,
}
impl Default for ServiceConf {
    fn default() -> Self {
        Self::new()
    }
}
impl ServiceConf {
    /**
     *  Returns a new empty `ServiceConf`
     */
    pub fn new() -> Self {
        Self {
            name: String::new(),
            command: String::new(),
            args: None,
            directory: None,
            autostart: false,
        }
    }
    /**
     *  Returns a new `ServiceConf` from parts.
     */
    pub fn from_parts(
        name: String,
        command: String,
        args: Option<String>,
        directory: Option<PathBuf>,
        autostart: bool,
    ) -> Self {
        Self {
            name,
            command,
            args,
            directory,
            autostart,
        }
    }
}

#[derive(Debug)]
pub struct Service {
    conf: ServiceConf,
    proc: Option<Arc<Mutex<Child>>>,
    stdout: Option<Arc<Mutex<Receiver<String>>>>,
    stderr: Option<Arc<Mutex<Receiver<String>>>>,
}
impl Default for Service {
    fn default() -> Self {
        Self::new()
    }
}
impl Service {
    /**
     *  Returns a new empty `Service`
     */
    pub fn new() -> Self {
        Self {
            conf: ServiceConf::default(),
            proc: None,
            stdout: None,
            stderr: None,
        }
    }
    /**
     *  Returns a `Service` made from a `ServiceConf`.
     */
    pub fn from_conf(conf: &ServiceConf) -> Self {
        Self {
            conf: conf.clone(),
            proc: None,
            stdout: None,
            stderr: None,
        }
    }
    /**
     *  Returns the name of the service
     */
    pub async fn name(&self) -> &str {
        &self.conf.name
    }
    /**
     *  Uses `tokio::process::Command` to start the service.
     */
    pub async fn start(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        if self.proc.is_some() {
            return Err(Box::new(std::io::Error::new(
                std::io::ErrorKind::AlreadyExists,
                "Process Already Exists",
            )));
        }
        let cmd = &self.conf.command;
        let args = if let Some(a) = &self.conf.args {
            a.split_whitespace()
        } else {
            "".split_whitespace()
        };
        let cwd = if let Some(c) = &self.conf.directory {
            c
        } else {
            &PathBuf::from("/")
        };
        let child = Command::new(cmd)
            .args(args)
            .current_dir(cwd)
            .stdin(Stdio::piped())
            .stdout(Stdio::piped())
            .stderr(Stdio::piped())
            .spawn()?;
        self.proc = Some(Arc::new(Mutex::new(child)));
        Ok(())
    }
    /**
     *  Returns true when process is started and false when process is stopped.
     */
    pub async fn started(&self) -> bool {
        self.proc.is_some()
    }
    /**
     *  Invokes kill on the service process
     */
    pub async fn stop(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        if let Some(proc) = self.proc.clone() {
            let mut lock = proc.lock().await;
            lock.kill().await?;
            drop(lock);
            self.proc = None;
            Ok(())
        } else {
            Err(Box::new(std::io::Error::new(
                std::io::ErrorKind::NotFound,
                "No Process Associated with Service",
            )))
        }
    }
    /**
     *  Restarts service process
     */
    pub async fn restart(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        self.stop().await?;
        self.start().await?;
        Ok(())
    }
    /**
     *  Takes control of service process' stdout file handle and spawns a new task to continuously
     *  scan it.
     */
    pub async fn scan_stdout(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        if let Some(proc) = self.proc.clone() {
            let mut lock = proc.lock().await;
            let stdout = if let Some(stdout) = lock.stdout.take() {
                stdout
            } else {
                return Err(Box::new(std::io::Error::new(
                    std::io::ErrorKind::NotFound,
                    "No stdout handle associated with process",
                )));
            };
            drop(lock);
            let (tx, rx) = channel(100);
            let sname = self.conf.name.clone();
            spawn(async move {
                let mut br = BufReader::new(stdout).lines();
                while let Ok(Some(line)) = br.next_line().await {
                    println!("{} :: {}", &sname, &line);
                    if let Err(_) = tx.send(line).await {
                        return;
                    };
                }
            });
            self.stdout = Some(Arc::new(Mutex::new(rx)));
            Ok(())
        } else {
            Err(Box::new(std::io::Error::new(
                std::io::ErrorKind::NotFound,
                "No Process Associated with Service",
            )))
        }
    }
    /**
     *  Takes control of service process' stderr file handle and spawns a new task to continuously
     *  scan it.
     */
    pub async fn scan_stderr(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        if let Some(proc) = self.proc.clone() {
            let mut lock = proc.lock().await;
            let stderr = if let Some(stderr) = lock.stderr.take() {
                stderr
            } else {
                return Err(Box::new(std::io::Error::new(
                    std::io::ErrorKind::NotFound,
                    "No stderr handle associated with process",
                )));
            };
            drop(lock);
            let (tx, rx) = channel(100);
            let sname = self.conf.name.clone();
            spawn(async move {
                let mut br = BufReader::new(stderr).lines();
                while let Ok(Some(line)) = br.next_line().await {
                    println!("ERR :: {} :: {}", &sname, &line);
                    if let Err(_) = tx.send(line).await {
                        return;
                    };
                }
            });
            self.stderr = Some(Arc::new(Mutex::new(rx)));
            Ok(())
        } else {
            Err(Box::new(std::io::Error::new(
                std::io::ErrorKind::NotFound,
                "No Process Associated with Service",
            )))
        }
    }
    /**
     *  Writes to the service process' stdin, if it exists.
     */
    pub async fn write_stdin(&mut self, buf: String) -> Result<(), Box<dyn std::error::Error>> {
        if let Some(proc) = self.proc.clone() {
            let mut lock = proc.lock().await;
            let stdin = if let Some(stdin) = lock.stdin.as_mut() {
                stdin
            } else {
                return Err(Box::new(std::io::Error::new(
                    std::io::ErrorKind::NotFound,
                    "No stdin handle associated with process",
                )));
            };
            stdin.write(&buf.as_bytes()).await?;
            Ok(())
        } else {
            Err(Box::new(std::io::Error::new(
                std::io::ErrorKind::NotFound,
                "No Process Associated with Service",
            )))
        }
    }
}
Revision:	8
Committed:	Tue Jul 8 01:49:14 2025 UTC (3 months ago) by yuzu
Original Path:	*trunk/src/model.rs*
File size:	7650 byte(s)
Log Message:	go fully async
#	User	Rev	Content
1	yuzu	7	use serde::{Deserialize, Serialize};
2	yuzu	8	use tokio::{
3			io::{AsyncBufReadExt, AsyncWriteExt, BufReader},
4			process::{Child, Command},
5			sync::{
6			Mutex,
7			mpsc::{Receiver, channel},
8			},
9			task::spawn,
10	yuzu	7	};
11
12	yuzu	8	use std::{path::PathBuf, process::Stdio, sync::Arc};
13
14	yuzu	7	#[derive(Serialize, Deserialize, Clone, Debug)]
15			pub struct ServiceConf {
16			pub name: String,
17	yuzu	8	pub command: String,
18			pub args: Option<String>,
19			pub directory: Option<PathBuf>,
20	yuzu	7	pub autostart: bool,
21			}
22	yuzu	8	impl Default for ServiceConf {
23			fn default() -> Self {
24			Self::new()
25			}
26			}
27	yuzu	7	impl ServiceConf {
28	yuzu	8	/**
29			* Returns a new empty `ServiceConf`
30			*/
31	yuzu	7	pub fn new() -> Self {
32			Self {
33			name: String::new(),
34			command: String::new(),
35			args: None,
36			directory: None,
37			autostart: false,
38			}
39			}
40	yuzu	8	/**
41			* Returns a new `ServiceConf` from parts.
42			*/
43	yuzu	7	pub fn from_parts(
44			name: String,
45			command: String,
46			args: Option<String>,
47			directory: Option<PathBuf>,
48			autostart: bool,
49			) -> Self {
50			Self {
51			name,
52			command,
53			args,
54			directory,
55			autostart,
56			}
57			}
58			}
59
60			#[derive(Debug)]
61			pub struct Service {
62	yuzu	8	conf: ServiceConf,
63			proc: Option<Arc<Mutex<Child>>>,
64			stdout: Option<Arc<Mutex<Receiver<String>>>>,
65			stderr: Option<Arc<Mutex<Receiver<String>>>>,
66	yuzu	7	}
67	yuzu	8	impl Default for Service {
68			fn default() -> Self {
69			Self::new()
70			}
71			}
72	yuzu	7	impl Service {
73	yuzu	8	/**
74			* Returns a new empty `Service`
75			*/
76	yuzu	7	pub fn new() -> Self {
77			Self {
78	yuzu	8	conf: ServiceConf::default(),
79			proc: None,
80			stdout: None,
81			stderr: None,
82	yuzu	7	}
83			}
84	yuzu	8	/**
85			* Returns a `Service` made from a `ServiceConf`.
86			*/
87			pub fn from_conf(conf: &ServiceConf) -> Self {
88	yuzu	7	Self {
89	yuzu	8	conf: conf.clone(),
90			proc: None,
91			stdout: None,
92			stderr: None,
93	yuzu	7	}
94			}
95	yuzu	8	/**
96			* Returns the name of the service
97			*/
98			pub async fn name(&self) -> &str {
99			&self.conf.name
100			}
101			/**
102			* Uses `tokio::process::Command` to start the service.
103			*/
104			pub async fn start(&mut self) -> Result<(), Box<dyn std::error::Error>> {
105			if self.proc.is_some() {
106	yuzu	7	return Err(Box::new(std::io::Error::new(
107			std::io::ErrorKind::AlreadyExists,
108	yuzu	8	"Process Already Exists",
109	yuzu	7	)));
110			}
111	yuzu	8	let cmd = &self.conf.command;
112			let args = if let Some(a) = &self.conf.args {
113			a.split_whitespace()
114	yuzu	7	} else {
115	yuzu	8	"".split_whitespace()
116	yuzu	7	};
117	yuzu	8	let cwd = if let Some(c) = &self.conf.directory {
118			c
119	yuzu	7	} else {
120	yuzu	8	&PathBuf::from("/")
121	yuzu	7	};
122	yuzu	8	let child = Command::new(cmd)
123			.args(args)
124			.current_dir(cwd)
125			.stdin(Stdio::piped())
126			.stdout(Stdio::piped())
127			.stderr(Stdio::piped())
128			.spawn()?;
129			self.proc = Some(Arc::new(Mutex::new(child)));
130	yuzu	7	Ok(())
131			}
132	yuzu	8	/**
133			* Returns true when process is started and false when process is stopped.
134			*/
135			pub async fn started(&self) -> bool {
136			self.proc.is_some()
137			}
138			/**
139			* Invokes kill on the service process
140			*/
141			pub async fn stop(&mut self) -> Result<(), Box<dyn std::error::Error>> {
142			if let Some(proc) = self.proc.clone() {
143			let mut lock = proc.lock().await;
144			lock.kill().await?;
145			drop(lock);
146			self.proc = None;
147			Ok(())
148			} else {
149			Err(Box::new(std::io::Error::new(
150			std::io::ErrorKind::NotFound,
151			"No Process Associated with Service",
152			)))
153			}
154			}
155			/**
156			* Restarts service process
157			*/
158			pub async fn restart(&mut self) -> Result<(), Box<dyn std::error::Error>> {
159			self.stop().await?;
160			self.start().await?;
161			Ok(())
162			}
163			/**
164			* Takes control of service process' stdout file handle and spawns a new task to continuously
165			* scan it.
166			*/
167			pub async fn scan_stdout(&mut self) -> Result<(), Box<dyn std::error::Error>> {
168			if let Some(proc) = self.proc.clone() {
169			let mut lock = proc.lock().await;
170			let stdout = if let Some(stdout) = lock.stdout.take() {
171			stdout
172	yuzu	7	} else {
173			return Err(Box::new(std::io::Error::new(
174	yuzu	8	std::io::ErrorKind::NotFound,
175			"No stdout handle associated with process",
176			)));
177			};
178			drop(lock);
179			let (tx, rx) = channel(100);
180			let sname = self.conf.name.clone();
181			spawn(async move {
182			let mut br = BufReader::new(stdout).lines();
183			while let Ok(Some(line)) = br.next_line().await {
184			println!("{} :: {}", &sname, &line);
185			if let Err(_) = tx.send(line).await {
186			return;
187			};
188			}
189			});
190			self.stdout = Some(Arc::new(Mutex::new(rx)));
191			Ok(())
192	yuzu	7	} else {
193	yuzu	8	Err(Box::new(std::io::Error::new(
194	yuzu	7	std::io::ErrorKind::NotFound,
195	yuzu	8	"No Process Associated with Service",
196			)))
197			}
198	yuzu	7	}
199	yuzu	8	/**
200			* Takes control of service process' stderr file handle and spawns a new task to continuously
201			* scan it.
202			*/
203			pub async fn scan_stderr(&mut self) -> Result<(), Box<dyn std::error::Error>> {
204			if let Some(proc) = self.proc.clone() {
205			let mut lock = proc.lock().await;
206			let stderr = if let Some(stderr) = lock.stderr.take() {
207			stderr
208			} else {
209			return Err(Box::new(std::io::Error::new(
210			std::io::ErrorKind::NotFound,
211			"No stderr handle associated with process",
212			)));
213			};
214			drop(lock);
215			let (tx, rx) = channel(100);
216			let sname = self.conf.name.clone();
217			spawn(async move {
218			let mut br = BufReader::new(stderr).lines();
219			while let Ok(Some(line)) = br.next_line().await {
220			println!("ERR :: {} :: {}", &sname, &line);
221			if let Err(_) = tx.send(line).await {
222			return;
223			};
224	yuzu	7	}
225	yuzu	8	});
226			self.stderr = Some(Arc::new(Mutex::new(rx)));
227			Ok(())
228	yuzu	7	} else {
229			Err(Box::new(std::io::Error::new(
230			std::io::ErrorKind::NotFound,
231	yuzu	8	"No Process Associated with Service",
232	yuzu	7	)))
233			}
234			}
235	yuzu	8	/**
236			* Writes to the service process' stdin, if it exists.
237			*/
238			pub async fn write_stdin(&mut self, buf: String) -> Result<(), Box<dyn std::error::Error>> {
239			if let Some(proc) = self.proc.clone() {
240			let mut lock = proc.lock().await;
241			let stdin = if let Some(stdin) = lock.stdin.as_mut() {
242			stdin
243	yuzu	7	} else {
244	yuzu	8	return Err(Box::new(std::io::Error::new(
245			std::io::ErrorKind::NotFound,
246			"No stdin handle associated with process",
247			)));
248			};
249			stdin.write(&buf.as_bytes()).await?;
250			Ok(())
251	yuzu	7	} else {
252			Err(Box::new(std::io::Error::new(
253			std::io::ErrorKind::NotFound,
254	yuzu	8	"No Process Associated with Service",
255	yuzu	7	)))
256			}
257			}
258			}