Class: Logatron::BacktraceCleaner

Inherits:
Object
  • Object
show all
Defined in:
lib/logatron/backtrace_cleaner.rb

Instance Method Summary collapse

Instance Method Details

#clean(backtrace) ⇒ Object

Suppress irrelevant “external” frames. In practice, these are often the frames leading up to the “entry point” we care about, whether that’s a rails controller or a rabbit_stew handler.

Algorithm: partition frames into contiguous external/internal chunks. Starting at the bottom, suppress chunks until we find the entry point chunk.



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# File 'lib/logatron/backtrace_cleaner.rb', line 10

def clean(backtrace)
  all_chunks = backtrace.chunk { |x| external_frame?(x) }.to_a.reverse
  good_chunks = all_chunks.drop_while { |(is_ext, frames)| !entry_point_chunk?(is_ext, frames) }
  bad_chunks = all_chunks.take(all_chunks.size - good_chunks.size)
  good_bt = good_chunks.reverse.map(&:last).flatten
  bad_bt = bad_chunks.reverse.map(&:last).flatten
  good_bt + suppress(bad_bt)
rescue
  # if something went wrong, give up on cleaning the backtrace
  backtrace
end