Class: DTAS::UNIXClient

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

Overview

:nodoc:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path = self.class.default_path) ⇒ UNIXClient

Returns a new instance of UNIXClient.



16
17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/dtas/unix_client.rb', line 16

def initialize(path = self.class.default_path)
  @to_io = begin
    raise if ENV["_DTAS_NOSEQPACKET"]
    Socket.new(:AF_UNIX, :SOCK_SEQPACKET, 0)
  rescue
    warn("get your operating system developers to support " \
         "SOCK_SEQPACKET for AF_UNIX sockets")
    warn("falling back to SOCK_DGRAM, reliability possibly compromised")
    Socket.new(:AF_UNIX, :SOCK_DGRAM, 0)
  end
  @to_io.connect(Socket.pack_sockaddr_un(path))
end

Instance Attribute Details

#to_io ⇒ Object (readonly)

Returns the value of attribute to_io.



10
11
12
 
# File 'lib/dtas/unix_client.rb', line 10

def to_io
  @to_io
end

Class Method Details

.default_path ⇒ Object 



12
13
14
 
# File 'lib/dtas/unix_client.rb', line 12

def self.default_path
  (ENV["DTAS_PLAYER_SOCK"] || File.expand_path("~/.dtas/player.sock")).b
end

Instance Method Details

#req(args, timeout = nil) ⇒ Object 



40
41
42
43
 
# File 'lib/dtas/unix_client.rb', line 40

def req(args, timeout = nil)
  req_start(args)
  res_wait(timeout)
end

#req_ok(args, timeout = nil) ⇒ Object 



34
35
36
37
38
 
# File 'lib/dtas/unix_client.rb', line 34

def req_ok(args, timeout = nil)
  res = req(args, timeout)
  res == "OK" or raise "Unexpected response: #{res}"
  res
end

#req_start(args) ⇒ Object 



29
30
31
32
 
# File 'lib/dtas/unix_client.rb', line 29

def req_start(args)
  args = Shellwords.join(args) if Array === args
  @to_io.send(args, Socket::MSG_EOR)
end

#res_wait(timeout = nil) ⇒ Object 



45
46
47
48
49
50
 
# File 'lib/dtas/unix_client.rb', line 45

def res_wait(timeout = nil)
  @to_io.wait(timeout)
  nr = @to_io.nread
  nr > 0 or raise EOFError, "unexpected EOF from server"
  @to_io.recvmsg[0]
end