Class: RText::Frontend::Connector

Inherits:
Object
  • Object
show all
Includes:
Process, MessageHelper
Defined in:
lib/rtext/frontend/connector.rb

Instance Method Summary collapse

Methods included from MessageHelper

#each_json_object_string, #escape_all_strings, #extract_message, #serialize_message, #unescape_all_strings

Methods included from JsonInterface

#json_to_object, #object_to_json, set_j2o_converter, set_o2j_converter

Constructor Details

#initialize(config, options = {}) ⇒ Connector

Returns a new instance of Connector.



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# File 'lib/rtext/frontend/connector.rb', line 12

def initialize(config, options={})
  @config = config
  @logger = options[:logger]
  @state = :off
  @invocation_id = 1
  @invocations = {}
  @busy = false
  @busy_start_time = nil
  @connection_listener = options[:connect_callback]
  @outfile_provider = options[:outfile_provider]
  @keep_outfile = options[:keep_outfile]
  @connection_timeout = options[:connection_timeout] || 10
  @process_id = nil
end

Instance Method Details

#execute_command(obj, options = {}) ⇒ Object 



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# File 'lib/rtext/frontend/connector.rb', line 27

def execute_command(obj, options={})
  timeout = options[:timeout] || 10
  @busy = false if @busy_start_time && (Time.now > @busy_start_time + timeout)
  if @busy
    do_work
    return :backend_busy 
  end
  unless connected?
    connect unless connecting?
    do_work
  end
  if connected?
    obj["invocation_id"] = @invocation_id
    obj["type"] = "request"
    @socket.send(serialize_message(obj), 0)
    @logger.debug('Sent request') if @logger
    result = nil
    @busy = true
    @busy_start_time = Time.now
    if options[:response_callback]
      @invocations[@invocation_id] = lambda do |r|
        if r["type"] == "response" || r["type"] =~ /error$/
          @busy = false
        end
        options[:response_callback].call(r)
      end
      @invocation_id += 1
      do_work
      :request_pending 
    else
      @invocations[@invocation_id] = lambda do |r|
        if r["type"] == "response" || r["type"] =~ /error$/ 
          result = r
          @busy = false
        end
      end
      @invocation_id += 1
      while !result
        if Time.now > @busy_start_time + timeout
          result = :timeout
          @busy = false
        else
          sleep(0.1)
          do_work
        end
      end
      result
    end
  else
    @logger.debug('connecting')
    :connecting
  end
end

#resume ⇒ Object 



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# File 'lib/rtext/frontend/connector.rb', line 81

def resume
  do_work
end

#stop ⇒ Object 



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# File 'lib/rtext/frontend/connector.rb', line 85

def stop
  while connecting?
    do_work
    sleep(0.1)
  end
  if connected?
    execute_command({"type" => "request", "command" => "stop"})
    while do_work
      sleep(0.1)
    end
  end
  ensure_process_cleanup(@process_id, @keep_outfile ? nil : @out_file, 10)
  @process_id = nil
end