Class: Pandemic::ServerSide::Peer

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/pandemic/server_side/peer.rb

Defined Under Namespace

Classes: PeerUnavailableException

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util

#host_port, #logger, #with_mutex

Constructor Details

#initialize(addr, server) ⇒ Peer

Returns a new instance of Peer.



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# File 'lib/pandemic/server_side/peer.rb', line 8

def initialize(addr, server)
  @host, @port = host_port(addr)
  @server = server
  @pending_requests = with_mutex({})
  @incoming_connection_listeners = []
  @inc_threads_mutex = Mutex.new
  initialize_connection_pool
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/pandemic/server_side/peer.rb', line 6

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/pandemic/server_side/peer.rb', line 6

def port
  @port
end

Instance Method Details

#add_incoming_connection(conn) ⇒ Object 



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# File 'lib/pandemic/server_side/peer.rb', line 60

def add_incoming_connection(conn)
  # debug("Adding incoming connection")

  connect # if we're not connected, we should be

  
  thread = Thread.new(conn) do |connection|
    begin
      # debug("Incoming connection thread started")
      while @server.running
        # debug("Listening for incoming requests")
        request = connection.read(15)
        # debug("Read incoming request from peer")
        
        if request.nil?
          # debug("Incoming connection request is nil")
          break
        else
          # debug("Received incoming (#{request.strip})")
          handle_incoming_request(request, connection) if request =~ /^P/
          handle_incoming_response(request, connection) if request =~ /^R/
        end
      end
    rescue Exception => e
      warn("Unhandled exception in peer listener thread:\n#{e.inspect}\n#{e.backtrace.join("\n")}")
    ensure
      # debug("Incoming connection closing")
      conn.close if conn && !conn.closed?
      @inc_threads_mutex.synchronize { @incoming_connection_listeners.delete(Thread.current)}
      if @incoming_connection_listeners.empty?
        disconnect
      end
    end
  end
  
  @inc_threads_mutex.synchronize {@incoming_connection_listeners.push(thread) if thread.alive? }
end

#client_request(request, body) ⇒ Object 



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# File 'lib/pandemic/server_side/peer.rb', line 31

def client_request(request, body)
  # debug("Sending client's request to peer")
  # debug("Connection pool has #{@connection_pool.available_count} of #{@connection_pool.connections_count} connections available")

  successful = true
  @pending_requests.synchronize do
    @pending_requests[request.hash] = request
  end
  begin
    @connection_pool.with_connection do |connection|
      if connection && !connection.closed?
        # debug("Writing client's request")
        connection.write("P#{request.hash}#{[body.size].pack('N')}#{body}")
        connection.flush
        # debug("Finished writing client's request")
      else
        successful = false
      end
    end
  rescue Exception
    @pending_requests.synchronize { @pending_requests.delete(request.hash) }
    raise
  else
    if !successful
      @pending_requests.synchronize { @pending_requests.delete(request.hash) }
    end
  end
end

#connect ⇒ Object 



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# File 'lib/pandemic/server_side/peer.rb', line 17

def connect
  # debug("Forced connection to peer")
  @connection_pool.connect
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pandemic/server_side/peer.rb', line 27

def connected?
  @connection_pool.connected?
end

#disconnect ⇒ Object 



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# File 'lib/pandemic/server_side/peer.rb', line 22

def disconnect
  # debug("Disconnecting from peer")
  @connection_pool.disconnect
end