class DRb::ExtServManager

Attributes

uri[RW]

Public Class Methods

command() click to toggle source
# File lib/drb/extservm.rb, line 17
def self.command
  @@command
end
command=(cmd) click to toggle source
# File lib/drb/extservm.rb, line 21
def self.command=(cmd)
  @@command = cmd
end
new() click to toggle source
Calls superclass method MonitorMixin.new
# File lib/drb/extservm.rb, line 25
def initialize
  super()
  @cond = new_cond
  @servers = {}
  @waiting = []
  @queue = Thread::Queue.new
  @thread = invoke_thread
  @uri = nil
end

Public Instance Methods

regist(name, ro) click to toggle source
# File lib/drb/extservm.rb, line 47
def regist(name, ro)
  synchronize do
    @servers[name] = ro
    @cond.signal
  end
  self
end
service(name) click to toggle source
# File lib/drb/extservm.rb, line 36
def service(name)
  synchronize do
    while true
      server = @servers[name]
      return server if server && server.alive? # server may be `false'
      invoke_service(name)
      @cond.wait
    end
  end
end
unregist(name) click to toggle source
# File lib/drb/extservm.rb, line 55
def unregist(name)
  synchronize do
    @servers.delete(name)
  end
end

Private Instance Methods

invoke_service(name) click to toggle source
# File lib/drb/extservm.rb, line 70
def invoke_service(name)
  @queue.push(name)
end
invoke_service_command(name, command) click to toggle source
# File lib/drb/extservm.rb, line 74
  def invoke_service_command(name, command)
    raise "invalid command. name: #{name}" unless command
    synchronize do
      return if @servers.include?(name)
      @servers[name] = false
    end
    uri = @uri || DRb.uri
    if command.respond_to? :to_ary
      command = command.to_ary + [uri, name]
      pid = spawn(*command)
    else
      pid = spawn("#{command} #{uri} #{name}")
    end
    th = Process.detach(pid)
    th[:drb_service] = name
    th
  end
end
invoke_thread() click to toggle source
# File lib/drb/extservm.rb, line 62
def invoke_thread
  Thread.new do
    while name = @queue.pop
      invoke_service_command(name, @@command[name])
    end
  end
end