log4j logs in color!

log-color

#!/bin/bash -eu
#
# Color log4j-style logs for easier visual parsing.
#
# Usage:
#   tail foo.log | log-color
#   run-service | log-color

export TERM=xterm-256color

black="`   tput setaf 0; tput bold`"
red="`     tput setaf 1; tput bold`"
green="`   tput setaf 2; tput bold`"
yellow="`  tput setaf 3; tput bold`"
bluebold="`    tput setaf 4; tput bold`"
blue="`    tput setaf 4; tput bold`"
lightblue="`    tput setaf 27; tput bold`"
magenta="` tput setaf 5; tput bold`"
cyan="`    tput setaf 6; tput bold`"
white="`   tput setaf 7; tput bold`"
lightgrey="$(tput setaf 240)"
#off="`     tput sgr0`"
off="`     echo -ne "\x0f"`" # (Works better on both osx and linux...)

exec sed -r "

  # Timestamps
  s/^\[[0-9]{4}[^]]*\]/$lightgrey\\0$off/
  s/^[0-9]{4}-[0-9:,/ -]*/$lightgrey\\0$off/

  # Log levels
  s/\\b(FATAL|CRITICAL).*\\b/$magenta\\0$off/g
  s/\\bERROR.*\\b/$red\\0$off/g
  s/\\bWARN(ING)?.*\\b/$yellow\\0$off/g
  s/\\bINFO.*\\b/$green\\0$off/g
  s/\\bDEBUG.*\\b/$lightblue\\0$off/g
  s/\\bTRACE.*\\b/$cyan\\0$off/g

  # Grouped things
  s/ \[[^]]+\] \S+ - /$lightgrey\\0$off/
  s/ \([a-zA-Z_][a-zA-Z0-9_$.:]*\)$/$lightgrey\\0$off/
"

Attached is an example of an activemq log using this script like so

tail -f activemq.log | log-color