Exception handling in Boost.Asio

Question

Boost.Asio documentation suggests the following exception handling pattern:

boost::asio::io_service io_service;
...
for (;;)
{
  try
  {
    io_service.run()         


        

Answer 1

There is nothing wrong with the pattern recommended by Boost.Asio. What you should do is package any necessary information for handling the exception along with the exception object. If you use boost::exception (or a type derived from it) for your exception handling, you can very easily attach metadata (including session information) by creating a specialization of boost::error_info and attaching it to the exception object using operator<<. Your catch block can then extract this info with get_error_info.