Class: NREPL::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/nrepl-lazuli/connection.rb

Constant Summary collapse

@@debug_counter = 
0

Instance Method Summary collapse

Constructor Details

#initialize(input, debug: false, out: input, binding: nil, bindings: {}, bindings_by_id: {}) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/nrepl-lazuli/connection.rb', line 5

def initialize(
  input, debug: false, out: input,
  binding: nil,
  bindings: {},
  bindings_by_id: {}
)
  @debug = debug
  @in = input
  @out = out
  @pending_evals = {}
  @counter = 0
  @binding = binding
  @bindings = bindings
  @bindings_by_id = bindings_by_id
end

Instance Method Details

#send_exception(msg, e) ⇒ Object 



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# File 'lib/nrepl-lazuli/connection.rb', line 242

def send_exception(msg, e)
  send_msg(response_for(msg, { 'ex' => e.message, 'status' => ['done', 'error'] }))
end

#send_msg(msg) ⇒ Object 



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# File 'lib/nrepl-lazuli/connection.rb', line 246

def send_msg(msg)
  debug "Sending", msg
  @out.write(msg.bencode)
  @out.flush
end

#treat_messages! ⇒ Object 



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# File 'lib/nrepl-lazuli/connection.rb', line 21

def treat_messages!
  bencode = BEncode::Parser.new(@in)
  loop do
    break if @in.eof?
    msg = bencode.parse!
    debug "Received", msg
    next unless msg
    treat_msg(msg)
  end
  @pending_evals.each { |(i, _)| clear_eval!(i) }
rescue Errno::ECONNRESET
  @pending_evals.each { |(i, _)| clear_eval!(i) }
end

#treat_msg(msg) ⇒ Object 



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# File 'lib/nrepl-lazuli/connection.rb', line 35

def treat_msg(msg)
  case msg['op']
  when 'clone'
    register_session(msg)
  when 'describe'
    describe_msg(msg)
  when 'eval'
    eval_op(msg, false)
  when 'eval_pause'
    eval_op(msg, true)
  when 'last_exception'
    ex = Server.class_variable_get(:@@last_exception)
    send_msg(response_for(msg, { 'result' => ex.inspect, 'status' => ['done'] }))
  when 'eval_resume'
    msg['id'] ||= "eval_#{@counter += 1}"
    stop_id = msg['stop_id']
    clear_eval!(stop_id)

    send_msg(response_for(msg, {
      'status' => ['done'],
      'op' => msg['op']
    }))
  when 'unwatch'
    msg['id'] ||= "eval_#{@counter += 1}"
    watch_id = msg['watch_id']
    info = @bindings_by_id.delete(watch_id)
    if(info)
      file_info = @bindings.fetch(info[:file], {})
      content = file_info.fetch(info[:row], {})
      content.delete(watch_id)
      file_info.delete(info[:row]) if(content.empty?)
      @bindings.delete(info[:file]) if(file_info.empty?)
    end

    send_msg(response_for(msg, {
      'status' => ['done'],
      'op' => msg['op']
    }))
  when 'interrupt'
    id = if(msg['interrupt-id'])
      msg['interrupt-id']
    else
      @pending_evals.keys.first
    end
    pending = @pending_evals[id] || {}
    thread = pending[:thread]
    msg['id'] ||= (id || 'unknown')

    if(thread)
      thread.kill
      clear_eval!(id)
      send_msg(response_for(msg, {
        'status' => ['done', 'interrupted'],
        'op' => msg['op']
      }))

    else
      send_msg(response_for(msg, {
        'status' => ['done'],
        'op' => msg['op']
      }))
    end
  when 'watches_for_file'
    msg['id'] ||= "eval_#{@counter += 1}"
    file = msg['file']
    rows_bindings = @bindings[file] || {}
    send_msg(response_for(msg, {
      'status' => ['done'],
      'rows' => rows_bindings.keys.sort,
      'op' => msg['op']
    }))
  else
    send_msg(response_for(msg, {
      'op' => msg['op'],
      'status' => ['done', 'error'],
      'error' => "unknown operation: #{msg['op'].inspect}"
    }))
  end
end