ã¯ãã è¨æ¸¬ç¨ã® Rack Middleware ãèªä½ Rack åãããã«ã¦ã§ã¢ã¨è¨ãããã¡ã§åãé¢ããã¦ããããã§ã¯ãªããããªã®ã§ã以ä¸ã®æé ã§ã NewRelic::Agent::Instrumentation::Rack ã®èª¬æã®ã¨ããã«ãã¡ããªãã¯ã ããããããã«ã¦ã§ã¢ãä½æã lib/app_metric.rb: require 'new_relic/agent/instrumentation/rack' class AppMetric # ã¢ããªã±ã¼ã·ã§ã³ãã¹ã«ã¼ããããã«ã¦ã§ã¢ãå®è£ ï¼ def initialize(app) @app = app end def call(env) @app.call(env) end # call ãå®ç¾©ããå¾ã§ include ãããã¨ï¼ include NewRelic::Agent::Instrumentation::Rack e
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