Class: ZipkinTracer::HostnameResolver

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

Overview

Resolves hostnames in the endpoints of the annotations. Resolving hostnames is a very expensive operation. We want to store them raw in the main thread and resolve them in a different thread where we do not affect execution times.

Instance Method Summary collapse

Instance Method Details

#spans_with_ips(spans) ⇒ Object 



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# File 'lib/zipkin-tracer/hostname_resolver.rb', line 6

def spans_with_ips(spans)
  host_to_ip = hosts_to_ipv4(spans)

  each_annotation(spans) do |annotation|
    hostname = annotation.host.ipv4
    if hostname.to_s =~ /\A[a-zA-Z]/ # hostnames start with letters, else we already have an IP
      annotation.host.ipv4 = host_to_ip[hostname]
    end
  end
end