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require 'logger'
# The environment module is used to detect, and initialize the environment in
# which this library is active. It will use different default values based on the environment.
module StatsD::Instrument::Environment
extend self
# Instantiates a default backend for the current environment.
#
# @return [StatsD::Instrument::Backend]
# @see #environment
def default_backend
case environment
when 'production', 'staging'
StatsD::Instrument::Backends::UDPBackend.new(ENV['STATSD_ADDR'], ENV['STATSD_IMPLEMENTATION'])
when 'test'
StatsD::Instrument::Backends::NullBackend.new
else
StatsD::Instrument::Backends::LoggerBackend.new(StatsD.logger)
end
end
# Detects the current environment, either by asking Rails, or by inspecting environment variables.
#
# - Within a Rails application, <tt>Rails.env</tt> is used.
# - It will check the following environment variables in order: <tt>RAILS_ENV</tt>, <tt>RACK_ENV</tt>, <tt>ENV</tt>.
# - If none of these are set, it will return <tt>development</tt>
#
# @return [String] The detected environment.
def environment
if defined?(Rails)
Rails.env.to_s
else
ENV['RAILS_ENV'] || ENV['RACK_ENV'] || ENV['ENV'] || 'development'
end
end
# Sets default values for sample rate and logger.
#
# - Default sample rate is set to the value in the STATSD_SAMPLE_RATE environment variable,
# or 1.0 otherwise. See {StatsD#default_sample_rate}
# - {StatsD#logger} is set to a logger that send output to stderr.
#
# If you are including this library inside a Rails environment, additional initialization will
# be done as part of the {StatsD::Instrument::Railtie}.
#
# @return [void]
def setup
StatsD.default_sample_rate = ENV.fetch('STATSD_SAMPLE_RATE', 1.0).to_f
StatsD.logger = Logger.new($stderr)
end
end
StatsD::Instrument::Environment.setup
Version data entries
9 entries across 9 versions & 1 rubygems