Module: DruidConfig::Util

Included in:
Cluster, Entities::DataSource, Entities::Node, Entities::Task
Defined in:
lib/druid_config/util.rb

Overview

Commmon functions for the gem

Instance Method Summary collapse

Instance Method Details

#pop_uri ⇒ Object

Pop next base_uri



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# File 'lib/druid_config/util.rb', line 64

def pop_uri
  return if @uri_stack.nil? || @uri_stack.empty?
  self.class.base_uri(@uri_stack.pop)
end

#query_overlord ⇒ Object

Update the URI of HTTParty to perform queries to Overlord. After perform the query, the URI is reverted to coordinator.



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# File 'lib/druid_config/util.rb', line 39

def query_overlord
  return unless block_given?
  stash_uri
  self.class.base_uri(
    "#{DruidConfig.client.overlord}"\
    "druid/indexer/#{DruidConfig::Version::API_VERSION}")
  begin
    yield
  ensure
    # Ensure we revert the URI
    pop_uri
  end
end

#secure_query ⇒ Object

This method is used to protect the Gem to API errors. If a query fails, the client will be reset and try the query to new coordinator. If it fails too, a DruidApiError will be launched.

If the error comes from another point of the code, the Exception is launched normally



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# File 'lib/druid_config/util.rb', line 17

def secure_query
  return unless block_given?
  @retries = 0
  begin
    yield
  rescue HTTParty::RedirectionTooDeep => e
    raise(DruidApiError, e) if @retries > 0
    @retries += 1
    reset!
    retry
  rescue Errno::ECONNREFUSED => e
    raise(DruidApiError, e) if @retries > 0
    @retries += 1
    reset!
    retry
  end
end

#stash_uri ⇒ Object

Stash current base_uri



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# File 'lib/druid_config/util.rb', line 56

def stash_uri
  @uri_stack ||= []
  @uri_stack.push self.class.base_uri
end