Class: Jaeger::Samplers::RemoteControlled::InstructionsFetcher

Inherits:
Object
  • Object
show all
Defined in:
lib/jaeger/samplers/remote_controlled/instructions_fetcher.rb

Constant Summary collapse

FetchFailed = 
Class.new(StandardError)

Instance Method Summary collapse

Constructor Details

#initialize(host:, port:, service_name:) ⇒ InstructionsFetcher

Returns a new instance of InstructionsFetcher.



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# File 'lib/jaeger/samplers/remote_controlled/instructions_fetcher.rb', line 9

def initialize(host:, port:, service_name:)
  @host = host
  @port = port
  @service_name = service_name
end

Instance Method Details

#fetch ⇒ Object 



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# File 'lib/jaeger/samplers/remote_controlled/instructions_fetcher.rb', line 15

def fetch
  http = Net::HTTP.new(@host, @port)
  path = "/sampling?service=#{CGI.escape(@service_name)}"
  response =
    begin
      http.request(Net::HTTP::Get.new(path))
    rescue StandardError => e
      raise FetchFailed, e.inspect
    end

  unless response.is_a?(Net::HTTPSuccess)
    raise FetchFailed, "Unsuccessful response (code=#{response.code})"
  end

  JSON.parse(response.body)
end