class MicroscopeTracer::RackMiddleware
Public Class Methods
new(app,service_name)
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# File lib/microscope_tracer/rack_middleware.rb, line 10 def initialize(app,service_name) @app = app @trace_logger = TraceLogger.new(service_name) end
Public Instance Methods
call(env)
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# File lib/microscope_tracer/rack_middleware.rb, line 15 def call(env) span = (env["SPAN"] ||= Headers.span_from_server_request_headers(env)) span.store_for_this_request started_at = Time.now @trace_logger.log_server_start(span) status, header, body = @app.call(env) body = Rack::BodyProxy.new(body) do duration = Time.now - started_at @trace_logger.log_server_end(span,duration) end [status, header, body] ensure RequestStore.clear! # make certain that any span info is cleared out before the next request comes in end