javalog_filter.py

import datetime
import sys
import json

def printThrown(thrown):
  if 'message' in thrown:
    print "  {name}: {message}".format(**thrown)
  else:
    print "  {name}".format(**thrown)

  if 'extendedStackTrace' in thrown:
    for entry in thrown['extendedStackTrace']:
      print "    at {class}.{method}({file}:{line})".format(**entry)

  if 'cause' in thrown:
    print "  caused by:"
    printThrown(thrown['cause'])

for line in sys.stdin:
    doc = json.loads(line)
    ms = doc['timeMillis']
    timestamp = datetime.datetime.fromtimestamp(ms/1000.0)
    print timestamp.isoformat() + ": " + doc['message']

    if 'thrown' in doc:
        thrown = doc['thrown']
        printThrown(doc['thrown'])