Class: RubyZipkin::RackHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-zipkin.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, service_name, scribe_server, scribe_port, uri_filter_list = [], http_header_filter_list = [], scribe_max_buffer = 10) ⇒ RackHandler

Returns a new instance of RackHandler.



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# File 'lib/ruby-zipkin.rb', line 13

def initialize(app, service_name, scribe_server, scribe_port, uri_filter_list =[], http_header_filter_list = [], scribe_max_buffer = 10)
@app = app
@lock = Mutex.new
@service_name = service_name
@scribe_port = scribe_port
@sample_rate = 0.1
@uri_filter_list = uri_filter_list
@http_header_filter_list = http_header_filter_list
@scribe = Scribe.new("#{scribe_server}:#{scribe_port}")
puts "using scribe server: #{@scribe.to_s}"
puts "#{scribe_server}:#{scribe_port}"
::Trace.tracer = ::Trace::ZipkinTracer.new(Scriber.new(@scribe), scribe_max_buffer)
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/ruby-zipkin.rb', line 27

def call(env)
  begin
    ::Trace.default_endpoint = ::Trace.default_endpoint.with_service_name(@service_name + "_#{normalized_uri(env['PATH_INFO'])}")
    ::Trace.sample_rate = 0.1
    env[ZipkinTraceHeader::PARENT_SPAN_ID] = @spanid
    env[ZipkinTraceHeader::TRACE_ID] = @tid

    # the debug trace
    #id = ::Trace::TraceId.new(@tid, nil, ::Trace.generate_id, true, ::Trace::Flags::DEBUG)
    #::Trace.push(id)
    #::Trace.set_rpc_name("debug")
    #::Trace.record(::Trace::BinaryAnnotation.new("http.uri", '/debug', "STRING", ::Trace.default_endpoint))

    @status, @headers, @response = @app.call(env)
    tracing_filter(get_or_create_trace_id2(env), env, @headers)

    #::Trace.pop
  rescue => e
    #Tracing errors shouldn't block a request.
    Rails.logger.info "Zipkin error: #{e} \n #{e.backtrace}"
    puts "Zipkin error: #{e} \n #{e.backtrace}"
  end
  [@status, @headers, @response]
end