Class: DRb::DRbConn

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

Overview

Class handling the connection between a DRbObject and the server the real object lives on.

This class maintains a pool of connections, to reduce the overhead of starting and closing down connections for each method call.

This class is used internally by DRbObject. The user does not normally need to deal with it directly.

Constant Summary collapse

POOL_SIZE =

:nodoc:

16

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(remote_uri) ⇒ DRbConn

:nodoc:



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# File 'lib/drb/drb.rb', line 1246

def initialize(remote_uri)  # :nodoc:
  @uri = remote_uri
  @protocol = DRbProtocol.open(remote_uri, DRb.config)
end

Instance Attribute Details

#uri ⇒ Object (readonly)

:nodoc:



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# File 'lib/drb/drb.rb', line 1250

def uri
  @uri
end

Class Method Details

.open(remote_uri) ⇒ Object

:nodoc:



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# File 'lib/drb/drb.rb', line 1211

def self.open(remote_uri)  # :nodoc:
  begin
    conn = nil

    @mutex.synchronize do
      #FIXME
      new_pool = []
      @pool.each do |c|
        if conn.nil? and c.uri == remote_uri
          conn = c if c.alive?
        else
          new_pool.push c
        end
      end
      @pool = new_pool
    end

    conn = self.new(remote_uri) unless conn
    succ, result = yield(conn)
    return succ, result

  ensure
    if conn
      if succ
        @mutex.synchronize do
          @pool.unshift(conn)
          @pool.pop.close while @pool.size > POOL_SIZE
        end
      else
        conn.close
      end
    end
  end
end

Instance Method Details

#alive? ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/drb/drb.rb', line 1262

def alive?  # :nodoc:
  return false unless @protocol
  @protocol.alive?
end

#close ⇒ Object

:nodoc:



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# File 'lib/drb/drb.rb', line 1257

def close  # :nodoc:
  @protocol.close
  @protocol = nil
end

#send_message(ref, msg_id, arg, block) ⇒ Object

:nodoc:



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# File 'lib/drb/drb.rb', line 1252

def send_message(ref, msg_id, arg, block)  # :nodoc:
  @protocol.send_request(ref, msg_id, arg, block)
  @protocol.recv_reply
end