Class: Flare::Tools::Cli::Balance

Inherits:
SubCommand show all
Includes:
IndexServerConfig, Flare::Tools::Common, Util::Constant, Util::Conversion
Defined in:
lib/flare/tools/cli/balance.rb

Constant Summary

Constants included from IndexServerConfig

IndexServerConfig::Entity, IndexServerConfig::FLARE_INDEX_SERVER, IndexServerConfig::FLARE_INDEX_SERVERS

Constants included from Util::Constant

Util::Constant::DefalutBwlimit, Util::Constant::DefaultIndexServerName, Util::Constant::DefaultIndexServerPort, Util::Constant::DefaultNodePort, Util::Constant::DefaultTimeout, Util::Constant::STATUS_NG, Util::Constant::STATUS_OK

Constants included from Flare::Tools::Common

Flare::Tools::Common::NodeListFormat, Flare::Tools::Common::NodeListHeader

Constants inherited from SubCommand

SubCommand::S_NG, SubCommand::S_OK

Constants included from Util::Interruption

Util::Interruption::InterruptionTargets

Instance Attribute Summary

Attributes included from Option

#optp

Instance Method Summary collapse

Methods included from Util::Logging

#debug, #error, #fatal, #info, logger, #puts, set_logger, #trace, #warn

Methods included from Flare::Tools::Common

#address_of_hostname, #fetch_cluster, #hostname_of_address, #nodekey_of, #string_of_nodelist, #user_confirmed, #wait_for_master_construction, #wait_for_servers, #wait_for_slave_construction

Methods included from Util::Conversion

#short_desc_of_second

Methods inherited from SubCommand

desc, #execute_subcommand, myname, #myname, to_s, to_sym, usage

Methods included from Util::Interruption

included, #initialize_interruption, #interrupt, #interrupt_, interrupt_all, #interrupted?, #interruptible, #interruptible?

Methods included from Option

#option_init, #parse_options, #set_option_dry_run, #set_option_force, #set_option_global, #set_option_index_server

Constructor Details

#initialize ⇒ Balance

Returns a new instance of Balance.



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# File 'lib/flare/tools/cli/balance.rb', line 34

def initialize
  super
  @force = false
end

Instance Method Details

#execute(config, args) ⇒ Object 



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# File 'lib/flare/tools/cli/balance.rb', line 39

def execute(config, args)
  parse_index_server(config, args)
  return S_NG if args.empty?

  hosts = args.map {|x| x.to_s.split(':')}
  hosts.each do |x|
    if x.size != 3
      puts "invalid argument '#{x.join(':')}'."
      return S_NG
    end
  end

  Flare::Tools::IndexServer.open(config[:index_server_hostname], config[:index_server_port], @timeout) do |s|
    cluster = Flare::Tools::Cluster.new(s.host, s.port, s.stats_nodes)

    hosts.each do |hostname,port,balance|
      balance = balance.to_i
      nodekey = nodekey_of hostname, port
      ipaddr = address_of_hostname(hostname)

      unless cluster.has_nodekey? nodekey
        error "unknown host: #{nodekey}"
        return S_NG
      end

      node = cluster.node_stat(nodekey)

      exec = false
      if @force
        exec = true
      elsif node['balance'].to_i == balance
        STDERR.puts "no need to change the balance of #{ipaddr}:#{port}."
      else
        interruptible do
          STDERR.print "updating node balance (node=#{ipaddr}:#{port}, balance=#{node['balance']} -> #{balance}) (y/n): "
          exec = true if gets.chomp.upcase == "Y"
        end
      end
      if exec
        s.set_role(hostname, port.to_i, node['role'], balance, node['partition']) unless @dry_run
      end
    end
    STDOUT.puts string_of_nodelist(s.stats_nodes, hosts.map {|x| "#{x[0]}:#{x[1]}"})
  end

  return S_OK
end

#setup ⇒ Object 



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# File 'lib/flare/tools/cli/balance.rb', line 27

def setup
  super
  set_option_index_server
  set_option_dry_run
  set_option_force
end