Module: Consul::Template::Generator::CMD

Includes:
Consul::Template::Generator
Defined in:
lib/consul/template/generator/cmd.rb

Constant Summary

Constants included from Consul::Template::Generator

VERSION

Class Method Summary collapse

Class Method Details

.configure(consul_host, templates, session_key, log_level, proxy = nil) ⇒ Object 



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# File 'lib/consul/template/generator/cmd.rb', line 10

def configure(consul_host, templates, session_key, log_level, proxy = nil)
  Consul::Template::Generator.configure do |config|
    config.log_level = log_level
    config.templates = templates
    config.session_key = session_key
    config.consul_host = consul_host
  end
  @config = Consul::Template::Generator.config
end

.configure_signal_handlers ⇒ Object 



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# File 'lib/consul/template/generator/cmd.rb', line 20

def configure_signal_handlers
  Signal.trap("INT") do
    @config.logger.error "Received INT signal..."
    @interrupted = true
  end
  Signal.trap("TERM") do
    @config.logger.error "Received TERM signal..."
    @terminated = true
    @interrupted = true
  end
end

.run(cycle_sleep = nil, lock_sleep = nil) ⇒ Object 



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# File 'lib/consul/template/generator/cmd.rb', line 32

def run(cycle_sleep = nil, lock_sleep = nil)
  configure_signal_handlers
  @terminated = false
  cycle_sleep ||= 0.5
  lock_sleep ||= 1.0
  uploaded_hashes = {}
  runner = CTRunner.new nil, false
  begin
    runner.create_session
    @interrupted = false
    runner.acquire_session_lock do
      @config.logger.info "Session lock acquired..."
      begin
        @config.templates.each do |template,template_key|
          uploaded_hashes[template] = runner.run(template, template_key, uploaded_hashes[template]) || uploaded_hashes[template]
          sleep cycle_sleep
        end
      rescue ConsulSessionExpired
        @config.logger.error "The current consul session has expired."
        break
      rescue Exception => e
        @config.logger.error "An error occurred while updating template: #{e.message}"
        @config.logger.debug "Sleeping before attempting to update again..."
        sleep lock_sleep
        break
      end until @interrupted
    end
  rescue Exception => e
    @config.logger.info "Unable to obtain session lock: #{e.message}"
    @config.logger.debug "Sleeping before attempting lock session again..."
    sleep lock_sleep
  ensure
    runner.destroy_session
  end until @terminated
  0
end

.run_once ⇒ Object 



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# File 'lib/consul/template/generator/cmd.rb', line 69

def run_once
  begin
    @config.templates.each do |template,template_key|
      runner = CTRunner.new
      result = runner.run template, template_key
    end
  rescue Exception => e
    @config.logger.error "An unexpected error occurred, unable to process template: #{e.message}"
    1
  else
    0
  end
end