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require "logger"
require_relative "core"
class Rack::Timeout::StateChangeLoggingObserver
STATE_LOG_LEVEL = { :expired => :error,
:ready => :info,
:active => :debug,
:timed_out => :error,
:completed => :info,
}
def initialize
@logger = nil
end
# returns the Proc to be used as the observer callback block
def callback
method(:log_state_change)
end
SIMPLE_FORMATTER = ->(severity, timestamp, progname, msg) { "#{msg} at=#{severity.downcase}\n" }
def self.mk_logger(device, level = ::Logger::INFO)
::Logger.new(device).tap do |logger|
logger.level = level
logger.formatter = SIMPLE_FORMATTER
end
end
attr_writer :logger
private
def logger(env = nil)
@logger ||
(defined?(::Rails) && ::Rails.respond_to?(:logger) && ::Rails.logger) ||
(env && !env["rack.logger"].is_a?(::Rack::NullLogger) && env["rack.logger"]) ||
(env && env["rack.errors"] && self.class.mk_logger(env["rack.errors"])) ||
(@fallback_logger ||= self.class.mk_logger($stderr))
end
# generates the actual log string
def log_state_change(env)
info = env[::Rack::Timeout::ENV_INFO_KEY]
level = STATE_LOG_LEVEL[info.state]
logger(env).send(level) do
s = +"source=rack-timeout"
s << " id=" << info.id if info.id
s << " wait=" << info.ms(:wait) if info.wait
s << " timeout=" << info.ms(:timeout) if info.timeout
s << " service=" << info.ms(:service) if info.service
s << " term_on_timeout=" << info.term.to_s if info.term
s << " state=" << info.state.to_s if info.state
s
end
end
end
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