├── .editorconfig ├── .gitignore ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-MIT ├── README.md ├── examples ├── cron.rs └── hello-world.rs └── src ├── agenda.rs ├── error.rs ├── job.rs ├── lib.rs └── schedule.rs /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | 3 | [*] 4 | indent_style = space 5 | indent_size = 4 6 | insert_final_newline = true 7 | trim_trailing_whitespace = true 8 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Generated by Cargo 2 | # will have compiled files and executables 3 | /target/ 4 | 5 | # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries 6 | # More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock 7 | Cargo.lock 8 | 9 | # These are backup files generated by rustfmt 10 | **/*.rs.bk 11 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "schedule" 3 | version = "0.2.0-pre" 4 | description = "An in-process scheduler for periodic jobs. Schedule lets you run Rust functions on a cron-like schedule." 5 | authors = ["Ryan Leckey "] 6 | homepage = "https://github.com/mehcode/schedule-rs" 7 | repository = "https://github.com/mehcode/schedule-rs" 8 | documentation = "https://docs.rs/schedule" 9 | readme = "README.md" 10 | license = "MIT/Apache-2.0" 11 | keywords = ["schedule", "cron", "job", "periodic"] 12 | 13 | [dependencies] 14 | cron = { git = "https://github.com/mehcode/cron", branch = "error-chain" } 15 | error-chain = "0.10.0" 16 | chrono = "0.3.0" 17 | time = "0.1" 18 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright 2017 Ryan Leckey 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | Copyright (c) 2017 Ryan Leckey 2 | 3 | Permission is hereby granted, free of charge, to any 4 | person obtaining a copy of this software and associated 5 | documentation files (the "Software"), to deal in the 6 | Software without restriction, including without 7 | limitation the rights to use, copy, modify, merge, 8 | publish, distribute, sublicense, and/or sell copies of 9 | the Software, and to permit persons to whom the Software 10 | is furnished to do so, subject to the following 11 | conditions: 12 | 13 | The above copyright notice and this permission notice 14 | shall be included in all copies or substantial portions 15 | of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF 18 | ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 19 | TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 20 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT 21 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 24 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 | DEALINGS IN THE SOFTWARE. 26 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # schedule-rs 2 | ![Rust](https://img.shields.io/badge/rust-nightly-red.svg) 3 | [![Crates.io](https://img.shields.io/crates/d/schedule.svg)](https://crates.io/crates/schedule) 4 | [![Docs.rs](https://docs.rs/schedule/badge.svg)](https://docs.rs/schedule) 5 | > An in-process scheduler for periodic jobs. Schedule lets you run Rust functions on a cron-like schedule. 6 | 7 | ## Install 8 | 9 | ```toml 10 | [dependencies] 11 | schedule = { git = "https://github.com/mehcode/schedule-rs" } 12 | ``` 13 | 14 | ## Usage 15 | 16 | ```rust 17 | extern crate schedule; 18 | extern crate chrono; 19 | 20 | use schedule::Agenda; 21 | use chrono::UTC; 22 | 23 | fn main() { 24 | let mut a = Agenda::new(); 25 | 26 | // Run every second 27 | a.add(|| { 28 | println!("at second :: {}", UTC::now()); 29 | }).schedule("* * * * * *").unwrap(); 30 | 31 | // Run every minute 32 | a.add(|| { 33 | println!("at minute :: {}", UTC::now()); 34 | }).schedule("0 * * * * *").unwrap(); 35 | 36 | // Run every hour 37 | a.add(|| { 38 | println!("at hour :: {}", UTC::now()); 39 | }).schedule("0 0 * * * *").unwrap(); 40 | 41 | // Check and run pending jobs in agenda every 500 milliseconds 42 | loop { 43 | a.run_pending(); 44 | 45 | std::thread::sleep(std::time::Duration::from_millis(500)); 46 | } 47 | } 48 | ``` 49 | 50 | ## License 51 | 52 | Schedule is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0). 53 | 54 | See LICENSE-APACHE and LICENSE-MIT for details. 55 | -------------------------------------------------------------------------------- /examples/cron.rs: -------------------------------------------------------------------------------- 1 | extern crate schedule; 2 | extern crate chrono; 3 | 4 | use std::{thread, time}; 5 | use chrono::*; 6 | 7 | fn cron_1() { 8 | println!("{}: Cron (#1)", UTC::now()); 9 | } 10 | 11 | fn cron_2() { 12 | println!("{}: Cron (#2)", UTC::now()); 13 | } 14 | 15 | fn cron_3() { 16 | println!("{}: Cron (#3)", UTC::now()); 17 | } 18 | 19 | fn main() { 20 | // Create new, empty agenda 21 | let mut a = schedule::Agenda::new(); 22 | 23 | // Schedule a job to run every second 24 | a.add(cron_1).schedule("* * * * * *").unwrap(); 25 | 26 | // Schedule a job to run every 10th second 27 | a.add(cron_2).schedule("0,10,20,30,40,50 * * * * *").unwrap(); 28 | 29 | // Schedule a job to run every minute 30 | a.add(cron_3).schedule("0 * * * * *").unwrap(); 31 | 32 | loop { 33 | // Execute pending jobs 34 | a.run_pending(); 35 | 36 | // Sleep for 500ms 37 | thread::sleep(time::Duration::from_millis(500)); 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /examples/hello-world.rs: -------------------------------------------------------------------------------- 1 | extern crate schedule; 2 | extern crate chrono; 3 | 4 | use std::{thread, time}; 5 | use chrono::*; 6 | 7 | fn hello_world_5() { 8 | println!("{}: Hello World (every 5 seconds)!", UTC::now()); 9 | } 10 | 11 | fn main() { 12 | // Create new, empty agenda 13 | let mut a = schedule::Agenda::new(); 14 | 15 | // Add a job from a closure, scheduled to run every 2 seconds 16 | a.add(|| { 17 | println!("{}: Hello World (every 2 seconds)!", UTC::now()); 18 | }) 19 | .schedule(Duration::seconds(2)) 20 | .unwrap(); 21 | 22 | // Add a job from a function and give it a name 23 | a.add(hello_world_5).with_name("hello-world"); 24 | 25 | // Schedule that job to run every 5 seconds 26 | a.get("hello-world") 27 | .unwrap() 28 | .schedule(Duration::seconds(5)) 29 | .unwrap(); 30 | 31 | loop { 32 | // Execute pending jobs 33 | a.run_pending(); 34 | 35 | // Sleep for 500ms 36 | thread::sleep(time::Duration::from_millis(500)); 37 | } 38 | } 39 | -------------------------------------------------------------------------------- /src/agenda.rs: -------------------------------------------------------------------------------- 1 | use job::Job; 2 | use schedule::TryIntoSchedule; 3 | use error::*; 4 | 5 | #[derive(Default)] 6 | pub struct Agenda { 7 | jobs: Vec, 8 | } 9 | 10 | impl Agenda { 11 | pub fn new() -> Self { 12 | Agenda::default() 13 | } 14 | 15 | /// Returns true if the Agenda contains no jobs. 16 | pub fn is_empty(&self) -> bool { 17 | self.jobs.is_empty() 18 | } 19 | 20 | /// Returns the number of jobs in the Agenda. 21 | pub fn len(&self) -> usize { 22 | self.jobs.len() 23 | } 24 | 25 | /// Clear the Agenda, removing all jobs. 26 | pub fn clear(&mut self) { 27 | self.jobs.clear() 28 | } 29 | 30 | /// Returns true if there is at least one job pending. 31 | pub fn is_pending(&self) -> bool { 32 | for job in &self.jobs { 33 | if job.is_pending() { 34 | return true; 35 | } 36 | } 37 | 38 | false 39 | } 40 | 41 | /// Run pending jobs in the Agenda. 42 | pub fn run_pending(&mut self) { 43 | for job in &mut self.jobs { 44 | if job.is_pending() { 45 | job.run(); 46 | } 47 | } 48 | } 49 | 50 | /// Adds a job to the agenda. 51 | pub fn add<'a, F: FnMut() + Send + Sync>(&'a mut self, function: F) -> JobBuilder<'a> 52 | where F: 'static 53 | { 54 | self.jobs.push(Job::new(function)); 55 | 56 | let index = self.jobs.len() - 1; 57 | 58 | JobBuilder { 59 | agenda: self, 60 | index: index, 61 | } 62 | } 63 | 64 | pub fn get<'a>(&'a mut self, name: &str) -> Option> { 65 | let mut index: Option = None; 66 | 67 | for (i, j) in self.jobs.iter().enumerate() { 68 | if let Some(ref job_name) = j.name { 69 | if job_name == name { 70 | index = Some(i); 71 | break; 72 | } 73 | } 74 | } 75 | 76 | index.map(move |index| { 77 | JobOperator { 78 | index: index, 79 | agenda: self, 80 | } 81 | }) 82 | } 83 | } 84 | 85 | /// View into an Agenda used to operate on a Job. Returned from `Agenda::get`. 86 | pub struct JobOperator<'a> { 87 | agenda: &'a mut Agenda, 88 | index: usize, 89 | } 90 | 91 | impl<'a> JobOperator<'a> { 92 | // Schedule this job. 93 | pub fn schedule(&mut self, s: S) -> Result<&mut JobOperator<'a>> 94 | where S: TryIntoSchedule 95 | { 96 | self.agenda.jobs[self.index].schedule(s)?; 97 | 98 | Ok(self) 99 | } 100 | 101 | /// Pause the evaluation of the Job's schedule. 102 | pub fn pause(&mut self) -> &mut JobOperator<'a> { 103 | self.agenda.jobs[self.index].is_active = false; 104 | self 105 | } 106 | 107 | /// Resume the evaluation of the Job's schedule. 108 | pub fn resume(&mut self) -> &mut JobOperator<'a> { 109 | self.agenda.jobs[self.index].is_active = true; 110 | self 111 | } 112 | 113 | /// Remove this Job from the agenda. 114 | pub fn remove(self) { 115 | self.agenda.jobs.remove(self.index); 116 | } 117 | } 118 | 119 | /// View into an Agenda used to build a Job. Returned from `Agenda::add`. 120 | pub struct JobBuilder<'a> { 121 | agenda: &'a mut Agenda, 122 | index: usize, 123 | } 124 | 125 | impl<'a> JobBuilder<'a> { 126 | /// Define a name for this job. 127 | pub fn with_name(&mut self, name: &str) -> &mut JobBuilder<'a> { 128 | self.agenda.jobs[self.index].name = Some(name.into()); 129 | 130 | self 131 | } 132 | 133 | // Schedule this job. 134 | pub fn schedule(self, s: S) -> Result> 135 | where S: TryIntoSchedule 136 | { 137 | self.agenda.jobs[self.index].schedule(s)?; 138 | 139 | Ok(JobOperator { 140 | agenda: self.agenda, 141 | index: self.index, 142 | }) 143 | } 144 | } 145 | -------------------------------------------------------------------------------- /src/error.rs: -------------------------------------------------------------------------------- 1 | use cron; 2 | use time; 3 | 4 | error_chain! { 5 | links { 6 | Cron(cron::error::Error, cron::error::ErrorKind); 7 | } 8 | 9 | foreign_links { 10 | TimeOutOfRange(time::OutOfRangeError); 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /src/job.rs: -------------------------------------------------------------------------------- 1 | use schedule::{Schedule, TryIntoSchedule}; 2 | use chrono::{DateTime, UTC}; 3 | use error::*; 4 | 5 | pub struct Job { 6 | pub function: Box, 7 | pub name: Option, 8 | pub schedule: Option, 9 | pub remaining: Option, 10 | pub next_run_at: Option>, 11 | pub last_run_at: Option>, 12 | pub is_active: bool, 13 | } 14 | 15 | impl Job { 16 | pub fn new(function: F) -> Self 17 | where F: 'static 18 | { 19 | Job { 20 | function: Box::new(function), 21 | name: None, 22 | remaining: None, 23 | schedule: None, 24 | next_run_at: None, 25 | last_run_at: None, 26 | is_active: true, 27 | } 28 | } 29 | 30 | /// Returns true if this job is pending execution. 31 | pub fn is_pending(&self) -> bool { 32 | // Check if paused 33 | if !self.is_active { 34 | return false; 35 | } 36 | 37 | // Check if we have a limit 38 | if let Some(rem) = self.remaining { 39 | if rem == 0 { 40 | return false; 41 | } 42 | } 43 | 44 | // Check if NOW is on or after next_run_at 45 | if let Some(next_run_at) = self.next_run_at { 46 | UTC::now() >= next_run_at 47 | } else { 48 | false 49 | } 50 | } 51 | 52 | /// Re-schedule the job. 53 | pub fn schedule(&mut self, s: S) -> Result<()> 54 | where S: TryIntoSchedule 55 | { 56 | // Parse a new schedule 57 | self.schedule = Some(s.try_into_schedule()?); 58 | 59 | // Reset the remaining count 60 | self.remaining = None; 61 | 62 | // Determine the next time it should run 63 | self.next_run_at = if let Some(ref schedule) = self.schedule { 64 | schedule.next(self.last_run_at) 65 | } else { 66 | None 67 | }; 68 | 69 | Ok(()) 70 | } 71 | 72 | /// Run the job immediately and re-schedule it. 73 | pub fn run(&mut self) { 74 | // Execute the job function 75 | (self.function)(); 76 | 77 | // Decrement remaining if set 78 | if let Some(ref mut rem) = self.remaining { 79 | if *rem > 0 { 80 | *rem -= 1; 81 | } 82 | } 83 | 84 | // Save the last time this ran 85 | self.last_run_at = Some(UTC::now()); 86 | 87 | // Determine the next time it should run 88 | self.next_run_at = if let Some(ref schedule) = self.schedule { 89 | schedule.next(self.last_run_at) 90 | } else { 91 | None 92 | }; 93 | } 94 | } 95 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | extern crate cron; 2 | extern crate chrono; 3 | extern crate time; 4 | 5 | #[macro_use] 6 | extern crate error_chain; 7 | 8 | mod schedule; 9 | mod job; 10 | mod agenda; 11 | pub mod error; 12 | 13 | pub use agenda::Agenda; 14 | -------------------------------------------------------------------------------- /src/schedule.rs: -------------------------------------------------------------------------------- 1 | use std::time; 2 | use cron; 3 | use error::*; 4 | use chrono::{DateTime, UTC, Duration}; 5 | 6 | pub enum Schedule { 7 | /// Set to execute on set time periods 8 | Periodic(cron::Schedule), 9 | 10 | /// Set to execute exactly `duration` away from the previous execution 11 | Interval(time::Duration), 12 | } 13 | 14 | impl Schedule { 15 | // Determine the next time we should execute (from a reference point) 16 | pub fn next(&self, after: Option>) -> Option> { 17 | let after = after.unwrap_or_else(UTC::now); 18 | 19 | match *self { 20 | Schedule::Periodic(ref cs) => cs.after(&after).next(), 21 | 22 | Schedule::Interval(ref duration) => { 23 | let ch_duration = match Duration::from_std(*duration) { 24 | Ok(value) => value, 25 | Err(_) => { 26 | return None; 27 | } 28 | }; 29 | 30 | Some(after + ch_duration) 31 | } 32 | } 33 | } 34 | } 35 | 36 | // TODO(@rust): Replace with TryFrom impl when stable 37 | // https://github.com/rust-lang/rust/issues/33417 38 | pub trait TryIntoSchedule { 39 | fn try_into_schedule(self) -> Result; 40 | } 41 | 42 | impl<'a> TryIntoSchedule for &'a str { 43 | fn try_into_schedule(self) -> Result { 44 | Ok(Schedule::Periodic(self.parse()?)) 45 | } 46 | } 47 | 48 | impl TryIntoSchedule for time::Duration { 49 | fn try_into_schedule(self) -> Result { 50 | Ok(Schedule::Interval(self)) 51 | } 52 | } 53 | 54 | impl TryIntoSchedule for Duration { 55 | fn try_into_schedule(self) -> Result { 56 | Ok(Schedule::Interval(self.to_std()?)) 57 | } 58 | } 59 | --------------------------------------------------------------------------------