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require "rubygems"
require "cabin"
# Logging::... is something I'm implemented and experimenting with.
@logger = Cabin::Channel.new
# A logging channel can have any number of subscribers.
# Any subscriber is simply expected to respond to '<<' and take a single
# argument (the event)
# Special case handling of stdlib Logger and IO objects comes for free, though.
@logger.subscribe(STDOUT)
# You can store arbitrary key-value pairs in the logging channel.
# These are emitted with every event.
@logger[:program] = "sample program"
def foo(val)
# A context is something that lets you modify key-value pieces in the
# logging channel and gives you a trivial way to undo the changes later.
context = @logger.context()
context[:foo] = val
context[:example] = 100
# The point of the context above is to save context so that the bar() method
# and it's logging efforts can include said context.
timer = @logger.time("Timing bar")
bar()
timer.stop # logs the result.
@logger.time("Another bar timer") do
bar()
end
# Clearing this context will exactly undo the changes made to the logger by
# this context.
context.clear()
end
def bar
@logger.info("bar bar bar!")
sleep(rand * 2)
end
foo("Hello")
@logger.info("All done.")
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