Module Mongo::ServerSelector
In: lib/mongo/server_selector/primary.rb
lib/mongo/server_selector/secondary.rb
lib/mongo/server_selector/secondary_preferred.rb
lib/mongo/server_selector/nearest.rb
lib/mongo/server_selector/primary_preferred.rb
lib/mongo/server_selector/selectable.rb
lib/mongo/server_selector.rb

Functionality for getting an object able to select a server, given a preference.

@since 2.0.0

Methods

get  

Classes and Modules

Module Mongo::ServerSelector::Selectable
Class Mongo::ServerSelector::Nearest
Class Mongo::ServerSelector::Primary
Class Mongo::ServerSelector::PrimaryPreferred
Class Mongo::ServerSelector::Secondary
Class Mongo::ServerSelector::SecondaryPreferred

Constants

LOCAL_THRESHOLD = 0.015.freeze   The max latency in seconds between the closest server and other servers considered for selection.

@since 2.0.0

SERVER_SELECTION_TIMEOUT = 30.freeze   How long to block for server selection before throwing an exception.

@since 2.0.0

SMALLEST_MAX_STALENESS_SECONDS = 90   The smallest allowed max staleness value, in seconds.

@since 2.4.0

PRIMARY = Options::Redacted.new(mode: :primary).freeze   Primary read preference.

@since 2.1.0

PREFERENCES = { nearest: Nearest, primary: Primary, primary_preferred: PrimaryPreferred, secondary: Secondary, secondary_preferred: SecondaryPreferred   Hash lookup for the selector classes based off the symbols 
  provided in configuration.

@since 2.0.0

Public Instance methods

get(preference = {})

Create a server selector object.

@example Get a server selector object for selecting a secondary with 

  specific tag sets.
  Mongo::ServerSelector.get(:mode => :secondary, :tag_sets => [{'dc' => 'nyc'}])

@param [ Hash ] preference The server preference.

@since 2.0.0

[Validate]