Class: Thrift::Socket

Inherits:
BaseTransport show all
Defined in:
lib/thrift/transport/socket.rb

Direct Known Subclasses

UNIXSocket

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from BaseTransport

#flush, #read_all, #read_byte, #read_into_buffer

Constructor Details

#initialize(host = 'localhost', port = 9090, timeout = nil) ⇒ Socket

Returns a new instance of Socket.



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# File 'lib/thrift/transport/socket.rb', line 25

def initialize(host='localhost', port=9090, timeout=nil)
  @host = host
  @port = port
  @timeout = timeout
  @desc = "#{host}:#{port}"
  @handle = nil
end

Instance Attribute Details

#handle ⇒ Object

Returns the value of attribute handle.



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# File 'lib/thrift/transport/socket.rb', line 33

def handle
  @handle
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/thrift/transport/socket.rb', line 33

def timeout
  @timeout
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/thrift/transport/socket.rb', line 130

def close
  @handle.close unless @handle.nil? or @handle.closed?
  @handle = nil
end

#open ⇒ Object 



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# File 'lib/thrift/transport/socket.rb', line 35

def open
  begin
    addrinfo = ::Socket::getaddrinfo(@host, @port, nil, ::Socket::SOCK_STREAM).first
    @handle = ::Socket.new(addrinfo[4], ::Socket::SOCK_STREAM, 0)
    @handle.setsockopt(::Socket::IPPROTO_TCP, ::Socket::TCP_NODELAY, 1)
    sockaddr = ::Socket.sockaddr_in(addrinfo[1], addrinfo[3])
    begin
      @handle.connect_nonblock(sockaddr)
    rescue Errno::EINPROGRESS
      unless IO.select(nil, [ @handle ], nil, @timeout)
        raise TransportException.new(TransportException::NOT_OPEN, "Connection timeout to #{@desc}")
      end
      begin
        @handle.connect_nonblock(sockaddr)
      rescue Errno::EISCONN
      end
    end
    @handle
  rescue StandardError => e
    raise TransportException.new(TransportException::NOT_OPEN, "Could not connect to #{@desc}: #{e}")
  end
end

#open? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/thrift/transport/socket.rb', line 58

def open?
  !@handle.nil? and !@handle.closed?
end

#read(sz) ⇒ Object

Raises:

  • (IOError) 


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# File 'lib/thrift/transport/socket.rb', line 94

def read(sz)
  raise IOError, "closed stream" unless open?

  begin
    if @timeout.nil? or @timeout == 0
      data = @handle.readpartial(sz)
    else
      # it's possible to interrupt select for something other than the timeout
      # so we need to ensure we've waited long enough, but not too long
      start = Time.now
      timespent = 0
      rd = loop do
        rd, = IO.select([@handle], nil, nil, @timeout - timespent)
        timespent = Time.now - start
        break rd if (rd and not rd.empty?) or timespent >= @timeout
      end
      if rd.nil? or rd.empty?
        raise TransportException.new(TransportException::TIMED_OUT, "Socket: Timed out reading #{sz} bytes from #{@desc}")
      else
        data = @handle.readpartial(sz)
      end
    end
  rescue TransportException => e
    # don't let this get caught by the StandardError handler
    raise e
  rescue StandardError => e
    @handle.close unless @handle.closed?
    @handle = nil
    raise TransportException.new(TransportException::NOT_OPEN, e.message)
  end
  if (data.nil? or data.length == 0)
    raise TransportException.new(TransportException::UNKNOWN, "Socket: Could not read #{sz} bytes from #{@desc}")
  end
  data
end

#to_io ⇒ Object 



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# File 'lib/thrift/transport/socket.rb', line 135

def to_io
  @handle
end

#write(str) ⇒ Object

Raises:

  • (IOError) 


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# File 'lib/thrift/transport/socket.rb', line 62

def write(str)
  raise IOError, "closed stream" unless open?
  str = Bytes.force_binary_encoding(str)
  begin
    if @timeout.nil? or @timeout == 0
      @handle.write(str)
    else
      len = 0
      start = Time.now
      while Time.now - start < @timeout
        rd, wr, = IO.select(nil, [@handle], nil, @timeout)
        if wr and not wr.empty?
          len += @handle.write_nonblock(str[len..-1])
          break if len >= str.length
        end
      end
      if len < str.length
        raise TransportException.new(TransportException::TIMED_OUT, "Socket: Timed out writing #{str.length} bytes to #{@desc}")
      else
        len
      end
    end
  rescue TransportException => e
    # pass this on
    raise e
  rescue StandardError => e
    @handle.close
    @handle = nil
    raise TransportException.new(TransportException::NOT_OPEN, e.message)
  end
end