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## 0.1.0 | ||
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- First release. |
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Copyright (c) 2015 Nick Elser | ||
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MIT License | ||
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Permission is hereby granted, free of charge, to any person obtaining | ||
a copy of this software and associated documentation files (the | ||
"Software"), to deal in the Software without restriction, including | ||
without limitation the rights to use, copy, modify, merge, publish, | ||
distribute, sublicense, and/or sell copies of the Software, and to | ||
permit persons to whom the Software is furnished to do so, subject to | ||
the following conditions: | ||
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The above copyright notice and this permission notice shall be | ||
included in all copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | ||
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | ||
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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# Zhong | ||
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Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/zhong`. To experiment with that code, run `bin/console` for an interactive prompt. | ||
Useful, reliable distributed cron. | ||
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TODO: Delete this and the text above, and describe your gem | ||
# Installation | ||
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## Installation | ||
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Add this line to your application's Gemfile: | ||
Add this line to your application’s Gemfile: | ||
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```ruby | ||
gem 'zhong' | ||
``` | ||
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And then execute: | ||
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$ bundle | ||
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Or install it yourself as: | ||
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$ gem install zhong | ||
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## Usage | ||
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TODO: Write usage instructions here | ||
```ruby | ||
r = Redis.new | ||
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Zhong.schedule(redis: r) do | ||
category "stuff" do | ||
every(5.seconds, "foo") { puts "foo" } | ||
every(1.week, "baz", at: "mon 22:45") { puts "baz" } | ||
end | ||
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category "clutter" do | ||
every(1.second, "compute", if: -> (t) { rand < 0.5 }) { puts "something happened" } | ||
end | ||
end | ||
``` | ||
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## Development | ||
## TODO | ||
- better logging | ||
- error handling | ||
- tests | ||
- examples | ||
- callbacks | ||
- generic handler | ||
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After checking out the repo, run `bin/setup` to install dependencies. Then, run `bin/console` for an interactive prompt that will allow you to experiment. | ||
## History | ||
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To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release` to create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org). | ||
View the [changelog](https://github.com/nickelser/zhong/blob/master/CHANGELOG.md). | ||
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## Contributing | ||
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1. Fork it ( https://github.com/[my-github-username]/zhong/fork ) | ||
2. Create your feature branch (`git checkout -b my-new-feature`) | ||
3. Commit your changes (`git commit -am 'Add some feature'`) | ||
4. Push to the branch (`git push origin my-new-feature`) | ||
5. Create a new Pull Request | ||
Everyone is encouraged to help improve this project. Here are a few ways you can help: | ||
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- [Report bugs](https://github.com/nickelser/zhong/issues) | ||
- Fix bugs and [submit pull requests](https://github.com/nickelser/zhong/pulls) | ||
- Write, clarify, or fix documentation | ||
- Suggest or add new features |
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require "bundler/gem_tasks" | ||
require "rake/testtask" | ||
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task default: :test | ||
Rake::TestTask.new do |t| | ||
t.libs << "test" | ||
t.pattern = "test/**/*_test.rb" | ||
end |
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require "zhong/version" | ||
require "monitor" | ||
require "logger" | ||
require "redis" | ||
require "suo" | ||
require "active_support/time" | ||
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module Zhong | ||
class Job | ||
attr_reader :description, :name, :category | ||
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def initialize(manager:, name:, every:, description: nil, category: nil, &block) | ||
@every = every | ||
@description = description | ||
@category = category | ||
@block = block | ||
@redis = manager.config[:redis] | ||
@logger = manager.config[:logger] | ||
@name = name | ||
@lock = Suo::Client::Redis.new(lock_key, client: @redis) | ||
@timeout = 5 | ||
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refresh_last_ran | ||
end | ||
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def run?(time = Time.now) | ||
!@last_ran || next_run_at < time | ||
end | ||
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def run(time = Time.now) | ||
return unless run?(time) | ||
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if running? | ||
@logger.info "already running: #{@name}" | ||
return | ||
end | ||
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ran_set = @lock.lock do | ||
refresh_last_ran | ||
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break unless run?(time) | ||
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if disabled? | ||
@logger.info "disabled: #{@name}" | ||
break | ||
end | ||
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@logger.info "running: #{@name}" | ||
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@thread = Thread.new { @block.call } if @block | ||
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ran!(time) | ||
end | ||
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@logger.info "unable to acquire exclusive run lock: #{@name}" unless ran_set | ||
end | ||
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def stop | ||
return unless running? | ||
Thread.new { @logger.error "killing #{@name} due to stop" } # thread necessary due to trap context | ||
@thread.join(@timeout) | ||
@thread.kill | ||
end | ||
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def running? | ||
@thread && @thread.alive? | ||
end | ||
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def next_run_at | ||
@last_ran ? (@last_ran + @every) : (Time.now - 0.001) | ||
end | ||
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def refresh_last_ran | ||
last_ran_val = @redis.get(run_time_key) | ||
@last_ran = last_ran_val ? Time.at(last_ran_val.to_i) : nil | ||
end | ||
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def disabled? | ||
!!@redis.get(disabled_key) | ||
end | ||
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private | ||
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def ran!(time) | ||
@last_ran = time | ||
@redis.set(run_time_key, @last_ran.to_i) | ||
end | ||
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def run_time_key | ||
"zhong:last_ran:#{@name}" | ||
end | ||
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def disabled_key | ||
"zhong:disabled:#{@name}" | ||
end | ||
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def lock_key | ||
"zhong:lock:#{@name}" | ||
end | ||
end | ||
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class Manager | ||
attr_reader :config, :redis | ||
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def initialize(config = {}) | ||
@jobs = [] | ||
@config = {timeout: 0.5, tz: "UTC"}.merge(config) | ||
@logger = @config[:logger] ||= default_logger | ||
@redis = @config[:redis] ||= Redis.new | ||
end | ||
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def start | ||
%w(QUIT INT TERM).each do |sig| | ||
Signal.trap(sig) { stop } | ||
end | ||
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@logger.info "starting" | ||
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loop do | ||
tick | ||
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break if @stop | ||
end | ||
end | ||
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def stop | ||
Thread.new { @logger.error "stopping" } # thread necessary due to trap context | ||
@stop = true | ||
@jobs.each(&:stop) | ||
Thread.new { @logger.info "stopped" } | ||
end | ||
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def add(job) | ||
@jobs << job | ||
end | ||
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def tick | ||
now = redis_time | ||
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@jobs.each { |job| job.run(now) } | ||
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sleep(interval) | ||
end | ||
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def interval | ||
1.0 - Time.now.subsec + 0.001 | ||
end | ||
require "zhong/version" | ||
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def redis_time | ||
s, ms = @redis.time # returns [seconds since epoch, microseconds] | ||
Time.at(s + ms / (10**6)) | ||
end | ||
require "zhong/at" | ||
require "zhong/every" | ||
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def default_logger | ||
Logger.new(STDOUT).tap do |logger| | ||
logger.formatter = -> (_, datetime, _, msg) { "#{datetime}: #{msg}\n" } | ||
end | ||
end | ||
end | ||
require "zhong/job" | ||
require "zhong/scheduler" | ||
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module Zhong | ||
class << self | ||
def included(klass) | ||
klass.send "include", Methods | ||
klass.extend Methods | ||
end | ||
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def manager | ||
@manager ||= Manager.new | ||
end | ||
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def manager=(manager) | ||
@manager = manager | ||
end | ||
end | ||
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module Methods | ||
def configure(&block) | ||
self.manager.configure(&block) | ||
end | ||
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# def handler(&block) | ||
# self.manager.handler(&block) | ||
# end | ||
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# def error_handler(&block) | ||
# self.manager.error_handler(&block) | ||
# end | ||
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def on(event, options={}, &block) | ||
self.manager.on(event, options, &block) | ||
end | ||
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def every(period, job, options={}, &block) | ||
self.manager.every(period, job, options, &block) | ||
end | ||
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def run | ||
self.manager.run | ||
def schedule(**opts, &block) | ||
@scheduler = Scheduler.new(opts) | ||
@scheduler.instance_eval(&block) | ||
@scheduler.start | ||
end | ||
end | ||
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extend Methods | ||
end | ||
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r = Redis.new | ||
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x = Zhong::Manager.new(redis: r) | ||
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j = Zhong::Job.new(manager: x, name: "j1", every: 10) { puts "FUCK THIS SHIT YOLOOOOO" } | ||
j2 = Zhong::Job.new(manager: x, name: "j2", every: 15) { puts "FUCK UuuuuuuuUUUUUU" } | ||
j3 = Zhong::Job.new(manager: x, name: "j3", every: 10) { puts "FUCK THIS SHIT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!" } | ||
j4 = Zhong::Job.new(manager: x, name: "j4", every: 5) { sleep 8; puts "RAN FUCK SHIT" } | ||
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x.add(j) | ||
x.add(j2) | ||
x.add(j3) | ||
x.add(j4) | ||
x.start |
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