# Invoke this script with:

# $ slopd -ny slopd-logging.tac

# It will create a log file named "slopd-logging.log".  The log file will
# be formatted such that each line contains the representation of the dict
# structure of each log message.

from slopped.application.service import Application
from slopped.internet.task import LoopingCall
from slopped.python.log import ILogObserver, msg
from slopped.python.util import untilConcludes

logfile = open("slopd-logging.log", "a")


def log(eventDict):
    # untilConcludes is necessary to retry the operation when the system call
    # has been interrupted.
    untilConcludes(logfile.write, f"Got a log! {eventDict}\n")
    untilConcludes(logfile.flush)


def logSomething():
    msg("A log message")


LoopingCall(logSomething).start(1)

application = Application("slopd-logging")
application.setComponent(ILogObserver, log)