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Copyright (c) 2009 Tim Harper | ||
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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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#!/usr/bin/env ruby | ||
require "rubygems" | ||
require "service_manager" | ||
ServiceManager.load_services ARGV[0] | ||
ServiceManager.start | ||
begin | ||
sleep | ||
rescue Interrupt => e | ||
end |
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require 'tcpsocket-wait' | ||
require 'background_process' | ||
require 'net/http' | ||
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module ServiceManager | ||
SERVICES_PATH = "./config/services.rb" | ||
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extend self | ||
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def services | ||
@services ||= [] | ||
end | ||
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def load_services(path = nil) | ||
path ||= SERVICES_PATH | ||
return if @services_loaded | ||
load path | ||
@services_loaded = true | ||
end | ||
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def define_service(name = nil, &block) | ||
name ||= File.basename(caller.first.gsub(/.rb:.+$/, "")) | ||
ServiceManager::Service.new(:name => name).tap do |service| | ||
yield service | ||
services << service | ||
end | ||
end | ||
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def services_hash | ||
Hash[ServiceManager.services.map { |s| [s.name.to_sym, s]}] | ||
end | ||
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def stop(which = :all) | ||
puts "Stopping the services..." | ||
services.map {|s| Thread.new { s.stop } }.map(&:join) | ||
end | ||
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def start(which = :all) | ||
load_services | ||
raise RuntimeError, "No services defined" if services.empty? | ||
threads = services.map do |s| | ||
Thread.new do | ||
begin | ||
s.start | ||
rescue ServiceManager::Service::ServerDidntStart | ||
puts "Quitting due to failure." | ||
exit(1) | ||
rescue Exception => e | ||
puts e | ||
puts e.backtrace | ||
exit(1) | ||
end | ||
end | ||
end | ||
threads.map(&:join) | ||
end | ||
end | ||
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require "service_manager/service" |
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class ServiceManager::Service | ||
NORMAL_COLOR = 37 | ||
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attr_accessor :name, :host, :port, :cwd, :reload_uri, :start_cmd, :process, :loaded_cue, :timeout, :color | ||
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class ServerDidntStart < Exception; end | ||
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def initialize(options = {}) | ||
options.each { |k,v| send("#{k}=", v) } | ||
self.host ||= "localhost" | ||
self.color ||= NORMAL_COLOR | ||
self.timeout ||= 30 | ||
raise ArgumentError, "You need to provide a name for this app service" unless name | ||
end | ||
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def url | ||
"http://#{host}:#{port}" | ||
end | ||
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def server_info_hash | ||
{:name => name, :host => host, :port => port} | ||
end | ||
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def watch_for_cue | ||
process.detect(:both, timeout) do |output| | ||
STDOUT << colorize(output) | ||
output =~ loaded_cue | ||
end | ||
end | ||
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def start_output_stream_thread | ||
Thread.new { process.detect { |output| STDOUT << colorize(output); nil} } | ||
end | ||
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def start_cmd | ||
@start_cmd.is_a?(Proc) ? instance_eval(&@start_cmd) : @start_cmd | ||
end | ||
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def without_bundler_env(&block) | ||
vars = %w{BUNDLE_PATH BUNDLE_GEMFILE BUNDLE_BIN_PATH} | ||
old_values = vars.map {|v| ENV.delete(v)} | ||
yield | ||
vars.zip(old_values).each { |var, value| ENV[var] = value } | ||
end | ||
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def start | ||
if running? | ||
puts "Server for #{colorized_service_name} detected as running." | ||
reload || puts("Reloading not supported. Any changes made to code for #{colorized_service_name} will not take effect!") | ||
return false | ||
end | ||
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puts "Starting #{colorized_service_name} in #{cwd} with '#{start_cmd}'" | ||
Dir.chdir(cwd) do | ||
without_bundler_env do | ||
# system("bash -c set") | ||
self.process = PTYBackgroundProcess.run(start_cmd) | ||
end | ||
end | ||
at_exit { stop } | ||
wait | ||
puts "Server #{colorized_service_name} is up." | ||
end | ||
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def stop | ||
return unless process | ||
puts "Shutting down #{colorized_service_name}" | ||
process.kill | ||
process.wait(3) | ||
if process.running? | ||
process.kill("KILL") # ok... no more Mr. Nice Guy. | ||
process.wait | ||
end | ||
puts "Server #{colorized_service_name} (#{process.pid}) is shut down" | ||
self.process = nil | ||
true | ||
end | ||
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def reload | ||
return false unless reload_uri | ||
puts "Reloading #{colorized_service_name} app by hitting http://#{host}:#{port}#{reload_uri} ..." | ||
res = Net::HTTP.start(host, port) {|http| http.get(reload_uri) } | ||
raise("Reloading app #{colorized_service_name} did not return a 200! It returned a #{res.code}. Output:\n#{colorize(res.body)}") unless res.code.to_i == 200 | ||
true | ||
end | ||
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def running? | ||
TCPSocket.listening_service?(:port => port, :host => host) | ||
end | ||
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protected | ||
def colorize(output) | ||
"\e[0;#{color}m#{output}\e[0;#{NORMAL_COLOR}m" | ||
end | ||
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def colorized_service_name | ||
if process | ||
colorize("#{name} (#{process.pid})") | ||
else | ||
colorize("#{name}") | ||
end | ||
end | ||
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def wait | ||
if loaded_cue | ||
raise(ServerDidntStart) unless watch_for_cue | ||
start_output_stream_thread | ||
else | ||
start_output_stream_thread | ||
begin | ||
TCPSocket.wait_for_service_with_timeout({:host => host, :port => port, :timeout => timeout}) | ||
rescue SocketError | ||
raise ServerDidntStart | ||
end | ||
end | ||
true | ||
end | ||
end |
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Gem::Specification.new do |s| | ||
s.name = %q{service_manager} | ||
s.version = "0.1" | ||
s.authors = ["Tim Harper"] | ||
s.date = Date.today.to_s | ||
s.default_executable = %q{start_services} | ||
s.description = <<-EOF | ||
It launches and interacts with a set of services from a single terminal window. | ||
* Colorizes output for each process to help distinguish them. | ||
* Useful for integration-test applications where you need to start up several processes and test them all. | ||
* Built because servolux wasn't working very well for me. | ||
* Can detect exactly when a service is successfully launched by watching the output of the process. | ||
EOF | ||
s.email = ["tim@leadtune.com"] | ||
s.executables = ["start_services"] | ||
s.extra_rdoc_files = [ | ||
"MIT-LICENSE" | ||
] | ||
s.files = ["MIT-LICENSE"] + Dir["lib/**/*"] | ||
s.homepage = %q{http://github.com/leadtune/service_manager} | ||
s.require_paths = ["lib"] | ||
s.summary = %q{service_manager} | ||
s.test_files = [] | ||
end |