require 'lwtarantool'
tnt = LWTarantool.new(url: '127.0.0.1:3301')

reqs = []
reqs << conn.call('box.slab.info', [])
reqs << conn.call('box.runtime.info', [])

reqs.each(&:wait)

if reqs[0].result
  puts "req0 result: #{reqs[0].result.inspect}"
else
  puts "req0 error: #{reqs[0].error}"
end

if reqs[1].result
  puts "req1 result: #{reqs[1].result.inspect}"
else
  puts "req1 error: #{reqs[1].error}"
end

slab_req = conn.call('box.slab.info', [])
runtime_req = conn.call('box.runtime.info', [])

2.times do
  req = conn.read
  case req
  when slab_req
    if req.result
      puts "slab info: #{req.result.inspect}"
    else
      puts "slab info error: #{req.error}"
    end
  when runtime_req
    if req.result
      puts "runtime info: #{req.result.inspect}"
    else
      puts "runtime info error: #{req.error}"
    end
  end
end