# File drb/extservm.rb, line 17
    def self.command
      @@command
    end

# File drb/extservm.rb, line 21
    def self.command=(cmd)
      @@command = cmd
    end

# File drb/extservm.rb, line 25
    def initialize
      super()
      @cond = new_cond
      @servers = {}
      @waiting = []
      @queue = Queue.new
      @thread = invoke_thread
      @uri = nil
    end

# File drb/extservm.rb, line 47
    def regist(name, ro)
      synchronize do
        @servers[name] = ro
        @cond.signal
      end
      self
    end

# File drb/extservm.rb, line 36
    def service(name)
      synchronize do
        while true
          server = @servers[name]
          return server if server && server.alive?
          invoke_service(name)
          @cond.wait
        end
      end
    end

# File drb/extservm.rb, line 55
    def unregist(name)
      synchronize do
        @servers.delete(name)
      end
    end