Class: Xively::Command::Subscribe

Inherits:
Base
  • Object
show all
Defined in:
lib/xively-cli/command/subscribe.rb

Overview

Subscribe to a feed or datastream via the Xively Socket Server

Instance Attribute Summary

Attributes inherited from Base

#args, #options

Instance Method Summary collapse

Methods inherited from Base

#initialize, namespace

Constructor Details

This class inherits a constructor from Xively::Command::Base

Instance Method Details

#index ⇒ Object

subscribe

connect to a tcp socket for a feed or datastream

-k, –key API_KEY # your api key -f, –feed FEED # the feed id -d, –datastream DATASTREAM # the datastream id (optional)

Example:

$ xively subscribe -k ABCD1234 -f 504 -d 0 # subscribe to datastream $ xively subscribe -k ABCD1234 -f 504 # subscribe to feed



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# File 'lib/xively-cli/command/subscribe.rb', line 21

def index
  api_key = options[:key]
  feed_id = options[:feed]
  datastream_id = options[:datastream]

  validate_arguments!

  unless api_key && feed_id
    $stderr.puts Xively::Command::Help.usage_for_command("subscribe")
    exit(1)
  end

  resource = "/feeds/#{feed_id}"
  resource += "/datastreams/#{datastream_id}" if datastream_id

  puts "Subscribing to updates for #{resource}"

  subscribe = "{\"method\":\"subscribe\", \"resource\":\"#{resource}\", \"headers\":{\"X-ApiKey\":\"#{api_key}\"}}"
  s = TCPSocket.new 'api.xively.com', 8081
  s.puts subscribe
  while line = s.gets
    parse_data(line, s)
  end
  s.close

  puts "Connection closed"

  # EventMachine.run {
  #   EventMachine::connect 'api.xively.com', 8081, XivelySocket, options
  # }
rescue Interrupt => e
  puts "Closing connection"
  s.close
  raise e
end