Class: Elasticsearch::Transport::Transport::Sniffer

Inherits:
Object
  • Object
show all
Defined in:
lib/elasticsearch/transport/transport/sniffer.rb

Overview

Handles node discovery (“sniffing”).

Constant Summary collapse

RE_URL =

Use named groups on Ruby 1.9: //(?<host>*):(?<port>+)]/

/\/([^:]*):([0-9]+)\]/

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(transport) ⇒ Sniffer

Returns a new instance of Sniffer.

Parameters:

  • transport (Object) —

    A transport instance.



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# File 'lib/elasticsearch/transport/transport/sniffer.rb', line 15

def initialize(transport)
  @transport = transport
  @timeout   = transport.options[:sniffer_timeout] || 1
end

Instance Attribute Details

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/elasticsearch/transport/transport/sniffer.rb', line 11

def timeout
  @timeout
end

#transport ⇒ Object (readonly)

Returns the value of attribute transport.



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# File 'lib/elasticsearch/transport/transport/sniffer.rb', line 10

def transport
  @transport
end

Instance Method Details

#hosts ⇒ Array<Hash>

Retrieves the node list from the Elasticsearch’s [_Nodes Info API_](www.elasticsearch.org/guide/reference/api/admin-cluster-nodes-info/) and returns a normalized Array of information suitable for passing to transport.

Shuffles the collection before returning it when the ‘randomize_hosts` option is set for transport.

Returns:

  • (Array<Hash>)

Raises:



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# File 'lib/elasticsearch/transport/transport/sniffer.rb', line 29

def hosts
  Timeout::timeout(timeout, SnifferTimeoutError) do
    nodes = transport.perform_request('GET', '_nodes/http').body
    hosts = nodes['nodes'].map do |id,info|
      if matches = info["#{transport.protocol}_address"].to_s.match(RE_URL)
        # TODO: Implement lightweight "indifferent access" here
        info.merge :host => matches[1], :port => matches[2], :id => id
      end
    end.compact

    hosts.shuffle! if transport.options[:randomize_hosts]
    hosts
  end
end