Class: Cow::Application

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

Defined Under Namespace

Classes: Cache

Constant Summary collapse

CACHE_FILE = 
'/var/cache/cow/cow.cache'.freeze

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Application

Returns a new instance of Application.



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# File 'lib/cow/application.rb', line 47

def initialize
  @name = 'cow'
end

Instance Method Details

#cmd_add(_hostname, _type, _snmp_community) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/cow/application.rb', line 140

def cmd_add(_hostname, _type, _snmp_community)
  raise ArgumentError unless _hostname.class == String && _type.class == String && _snmp_community.class == String
  raise ArgumentError unless Cow::SERVER_TYPES.keys.include?(_type.to_sym)

  puts "#{_hostname}(#{_type}) will be added"

  server = Cow::SERVER_TYPES[_type.to_sym].new(_hostname, _snmp_community)

  server.ports.each do |port|
    puts '%s %s' % ["#{server.hostname}/#{port.port}".ljust(30), port.name.to_s.ljust(20)]
  end

  load_cache

  edit_cache do |cache|
    cache.add_server server
  end if server
end

#cmd_connect(_portname) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/cow/application.rb', line 176

def cmd_connect(_portname)
  raise ArgumentError unless _portname.class == String

  load_cache

  @cache.servers.each do |server|
    server.find(_portname).each do |port|
      if port.name == _portname
        puts "Found on #{server.hostname}/#{port.port}. Connecting..."
        server.connect(port)
        break
      end
    end
  end
end

#cmd_delete(_hostname) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/cow/application.rb', line 159

def cmd_delete(_hostname)
  raise ArgumentError unless _hostname.class == String


  load_cache

  unless @cache.find_server(_hostname)
    puts "#{_hostname} is not found!!"
  end

  puts "#{_hostname} will be deleted"

  edit_cache do |cache|
    cache.delete_server _hostname
  end
end

#cmd_find(_keyword) ⇒ Object

Raises:

  • (ArgumentError) 


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

def cmd_find(_keyword)
  raise ArgumentError unless _keyword.class == String

  load_cache
  puts '%s %s %s' % ['SERVER/PORT'.ljust(30), 'PORTNAME'.ljust(20), 'COMMAND']

  @cache.servers.each do |server|
    server.find(_keyword).each do |port|
      puts '%s %s %s' % ["#{server.hostname}/#{port.port}".ljust(30), port.name.to_s.ljust(20), server.connect_command(port)]
    end
  end
end

#cmd_list(_hostname) ⇒ Object 



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# File 'lib/cow/application.rb', line 205

def cmd_list(_hostname)
  load_cache
  puts '%s %s %s' % ['SERVER/PORT'.ljust(30), 'PORTNAME'.ljust(20), 'COMMAND']

  @cache.servers.each do |server|
    if _hostname.nil? || server.hostname == _hostname
      server.ports.each do |port|
        puts '%s %s %s' % ["#{server.hostname}/#{port.port}".ljust(30), port.name.to_s.ljust(20), server.connect_command(port)]
      end
    end
  end
end

#cmd_server_list ⇒ Object 



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# File 'lib/cow/application.rb', line 218

def cmd_server_list
  load_cache
  puts 'SERVER(TYPE)'

  @cache.servers.each do |server|
    type = nil
    Cow::SERVER_TYPES.each_key{|t| type = t if Cow::SERVER_TYPES[t] == server.class}

    puts "#{server.hostname}(#{type})"
  end
end

#cmd_update(_hostname) ⇒ Object 



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# File 'lib/cow/application.rb', line 230

def cmd_update(_hostname)
  load_cache

  puts 'Updating local cache...'

  edit_cache do |cache|
    cache.servers.each do |server|
      if _hostname.nil? || server.hostname == _hostname
        puts "Updating server #{server.hostname}"
        server.update_ports

        puts '%s %s' % ['SERVER/PORT'.ljust(30), 'PORTNAME'.ljust(20)]
        server.ports.each do |port|
          puts '%s %s' % ["#{server.hostname}/#{port.port}".ljust(30), port.name.to_s.ljust(20)]
        end

        cache.add_server server
      end
    end
  end
end

#create_cache(_cache = CACHE_FILE) ⇒ Object 



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# File 'lib/cow/application.rb', line 51

def create_cache(_cache = CACHE_FILE)
  dir_name = File.dirname(_cache)
  if !File.exist?(dir_name)
    puts 'Cache directory is not found. Creating...'
    Dir.mkdir(dir_name)
  else
    if !File.directory?(dir_name)
      raise 'Cache directory path is already found but it is not a directory!!!'
    end
  end

  File.write(_cache, Cow::Application::Cache.new.to_yaml)
end

#edit_cache(_cache = CACHE_FILE) ⇒ Object 



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# File 'lib/cow/application.rb', line 85

def edit_cache(_cache = CACHE_FILE)
  unless @cache
    load_cache
  end

  cache = @cache

  File.open(_cache, 'w') do |file|
    puts 'Updating cache file.'
    if file.flock(File::LOCK_EX | File::LOCK_NB)

      begin
        yield cache
      rescue
        cache = @cache
      end

      if cache.class == Cow::Application::Cache
        file.write(cache.to_yaml)
      else
        file.write(@cache.to_yaml)
      end
    else
      raise 'File is already locked.'
    end
  end
  load_cache(_cache)
end

#load_cache(_cache = CACHE_FILE) ⇒ Object 



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# File 'lib/cow/application.rb', line 65

def load_cache(_cache = CACHE_FILE)
  unless File.exist?(_cache)
    puts 'Cache file is not found. Creating...'
    create_cache(_cache)
  end

  if File.size(_cache) < 5
    puts 'Cache file looks empty. Creating...'
    create_cache(_cache)
  end

  cache = YAML.load(File.read(_cache))

  if cache.class == Cow::Application::Cache
    @cache = cache
  else
    raise 'Cache file is corrupt?'
  end
end

#run ⇒ Object 



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# File 'lib/cow/application.rb', line 114

def run
  command = ARGV[0]
  option1 = ARGV[1]
  option2 = ARGV[2]
  option3 = ARGV[3]

  case command
  when 'add', 'a'
    cmd_add(option1, option2, option3)
  when 'delete', 'd'
    cmd_delete(option1)
  when 'connect', 'c'
    cmd_connect(option1)
  when 'find', 'f'
    cmd_find(option1)
  when 'list', 'l'
    cmd_list(option1)
  when 'server-list', 's'
    cmd_server_list
  when 'update', 'u'
    cmd_update(option1)
  else
    show_help
  end
end

#show_help ⇒ Object 



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# File 'lib/cow/application.rb', line 252

def show_help
  puts <<EOF
cow - Console Server Wrapper

Usage:
  cow [command] [options]

Commands:
  add [hostname] [type] [snmp_community]
Add new console server.
available types: #{Cow::SERVER_TYPES.keys.join(' ')}

  delete [hostname]
Delete existing console server.

  connect [portname]
Connect to console port.

  find [keyword]
Find console port which includes given name.

  list [hostname(optional)]
Show console server port list. If hostname is not specified,
all console ports will be shown.

  server-list
Show all console servers.

  update [hostname(optional)]
Update console server port list. If hostname is not specified,
all port lists will be updated.
EOF
end