import logging

import os

import ginkgo

class Logger(object):

logfile = ginkgo.Setting("logfile", default=None, help="""

Path to primary logfile

""".strip())

config = ginkgo.Setting("logconfig", default=None, help="""

Basic configuration of standard Python logger

""".strip())

def __init__(self, process):

if self.logfile is None:

process.config.set("logfile",

"/tmp/{}.log".format(process.app.service_name))

if self.config is None:

process.config.set("logconfig", dict(

format="%(asctime)s %(levelname) 7s %(module)s: %(message)s",

level=logging.DEBUG))

logging.basicConfig(**self.config)

self.file = None

def open(self):

self.file = open(self.logfile, "w", buffering=0)

def redirect(self, input):

os.dup2(self.file.fileno(), input.fileno())

def close(self):

if self.file:

self.file.close()

def print_log(self):

with open(self.logfile, "r") as f:

print f.read()

def tail_log(self):

with open(self.logfile, "r") as f:

lines = f.readlines()

for line in lines[-20:]:

print line.strip()

while True:

line = f.readline()

if line:

print line.strip()