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

PROTOCOL = 
'http'

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 32

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 28

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 27

def transport
  @transport
end

Instance Method Details

#hosts ⇒ Array<Hash>

Retrieves the node list from the Elasticsearch’s [_Nodes Info API_](www.elastic.co/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 46

def hosts
  Timeout::timeout(timeout, SnifferTimeoutError) do
    nodes = perform_sniff_request.body

    hosts = nodes['nodes'].map do |id, info|
      next unless info[PROTOCOL]
      host, port = parse_publish_address(info[PROTOCOL]['publish_address'])

      {
        id: id,
        name: info['name'],
        version: info['version'],
        host: host,
        port: port,
        roles: info['roles'],
        attributes: info['attributes']
      }
    end.compact

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