Class: Jarl::Application::Instance

Inherits:
Object
  • Object
show all
Defined in:
lib/jarl/application.rb

Overview

Application::Instance represents a single running instance of the application

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(application, n, container) ⇒ Instance

Returns a new instance of Instance.

Parameters:

  • application (Application)
  • n (nil, Integer) —

    Instance number, nil if an instance is the primary instance

  • container (nil, Docker::Container) —

    Running container, if present



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# File 'lib/jarl/application.rb', line 178

def initialize(application, n, container)
  @application = application
  @n = n
  @container = container
end

Instance Attribute Details

#application ⇒ Object (readonly)

Returns the value of attribute application.



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# File 'lib/jarl/application.rb', line 172

def application
  @application
end

#container ⇒ Object (readonly)

Returns the value of attribute container.



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# File 'lib/jarl/application.rb', line 172

def container
  @container
end

#n ⇒ Object (readonly)

Returns the value of attribute n.



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# File 'lib/jarl/application.rb', line 172

def n
  @n
end

Instance Method Details

#full_name ⇒ Object 



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# File 'lib/jarl/application.rb', line 188

def full_name
  n ? "#{application.full_name}.#{n}" : application.full_name
end

#hostname ⇒ Object 



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# File 'lib/jarl/application.rb', line 192

def hostname
  n ? "#{application.hostname}-#{n}" : application.hostname
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jarl/application.rb', line 184

def running?
  !@container.nil?
end

#ssh(command = nil) ⇒ Object 



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# File 'lib/jarl/application.rb', line 236

def ssh(command = nil)
  fail "Failed to open SSH, no running container for '#{full_name}'" unless running?
  container.open_ssh_session!(Jarl.config.params, command)
end

#start! ⇒ Object 



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# File 'lib/jarl/application.rb', line 201

def start!
  return if running?
  # puts esc_yellow("Starting #{application.name}.#{n}") if n

  Docker.start(
    name: full_name,
    hostname: hostname,
    image: application.image_name,
    volumes: application.volumes,
    ports: application.ports,
    environment: application.environment,
    command: application.command,
    logging: application.logging
  )
end

#stop! ⇒ Object 



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# File 'lib/jarl/application.rb', line 196

def stop!
  return unless running?
  @container.stop!
end

#tail_log(since = nil) ⇒ Object 



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# File 'lib/jarl/application.rb', line 217

def tail_log(since = nil)
  return unless running?
  color_code = Console::Colors::SEQUENCE[application.serial % Console::Colors::SEQUENCE.size]
  begin
    cmd = "docker logs #{since ? "--since #{since}" : nil} -f #{container.id}"
    IO.popen(cmd, 'r', external_encoding: Encoding::UTF_8) do |p|
      str = '<<< STARTED >>>'
      while str
        str = p.gets
        str.split("\n").each do |s|
          puts "#{esc_color color_code, full_name}: #{s}"
        end
      end
    end
  rescue Interrupt
    #
  end
end