impl( const config& c) : cfg( c )
{
if( cfg.rotate )
{
FC_ASSERT( cfg.rotation_interval >= seconds( 1 ) );
FC_ASSERT( cfg.rotation_limit >= cfg.rotation_interval );
_rotation_task = async( [this]() { rotate_files( true ); }, "rotate_files(1)" );
}
}
void rotate_files( bool initializing = false )
{
FC_ASSERT( cfg.rotate );
fc::time_point now = time_point::now();
fc::time_point_sec start_time = get_file_start_time( now, cfg.rotation_interval );
string timestamp_string = start_time.to_non_delimited_iso_string();
fc::path link_filename = cfg.filename;
fc::path log_filename = link_filename.parent_path() / (link_filename.filename().string() + "." + timestamp_string);
{
fc::scoped_lock<boost::mutex> lock( slock );
if( !initializing )
{
if( start_time <= _current_file_start_time )
{
_rotation_task = schedule( [this]() { rotate_files(); },
_current_file_start_time + cfg.rotation_interval.to_seconds(),
"rotate_files(2)" );
return;
}
out.flush();
out.close();
}
remove_all(link_filename); // on windows, you can't delete the link while the underlying file is opened for writing
if( fc::exists( log_filename ) )
out.open( log_filename, std::ios_base::out | std::ios_base::app );
else
out.open( log_filename, std::ios_base::out | std::ios_base::app);
create_hard_link(log_filename, link_filename);
}
/* Delete old log files */
fc::time_point limit_time = now - cfg.rotation_limit;
string link_filename_string = link_filename.filename().string();
directory_iterator itr(link_filename.parent_path());
for( ; itr != directory_iterator(); itr++ )
{
try
{
string current_filename = itr->filename().string();
if (current_filename.compare(0, link_filename_string.size(), link_filename_string) != 0 ||
current_filename.size() <= link_filename_string.size() + 1)
continue;
string current_timestamp_str = current_filename.substr(link_filename_string.size() + 1,
timestamp_string.size());
fc::time_point_sec current_timestamp = fc::time_point_sec::from_iso_string( current_timestamp_str );
if( current_timestamp < start_time )
{
if( current_timestamp < limit_time || file_size( current_filename ) <= 0 )
{
remove_all( *itr );
continue;
}
}
}
catch (const fc::canceled_exception&)
{
throw;
}
catch( ... )
{
}
}
_current_file_start_time = start_time;
_rotation_task = schedule( [this]() { rotate_files(); },
_current_file_start_time + cfg.rotation_interval.to_seconds(),
"rotate_files(3)" );
}
