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Contents
module Startback
module Web
#
# Can be used to easily implement a HealthCheck web service inside a Startback
# application.
#
# Examples:
#
# # Returns a 204 with no body
# run Startback::Web::HealthCheck.new
#
# # Returns a 204 with no body
# run Startback::Web::HealthCheck.new { nil }
#
# # Returns a 200 with Ok in plain text
# run Startback::Web::HealthCheck.new { "Ok" }
#
# # Re-raises the exception
# run Startback::Web::HealthCheck.new { raise "Something bad" }
#
# Please note that this rack app is not 100% Rack compliant, since it raises
# any error that the block itself raises. This class aims at being backed up
# by a Shield and/or CatchAll middleware.
#
# This class is not aimed at being subclassed.
#
class HealthCheck
def initialize(&bl)
@checker = bl
end
def call(env)
if debug_msg = check!(env)
[ 200, { "Content-Type" => "text/plain" }, Array(debug_msg) ]
else
[ 204, {}, [] ]
end
end
protected
def check!(env)
@checker.call if @checker
end
end # class HealthCheck
end # module Web
end # module Startback
Version data entries
63 entries across 63 versions & 3 rubygems