Class | Moped::ReadPreference::PrimaryPreferred |
In: |
lib/moped/read_preference/primary_preferred.rb
|
Parent: | Object |
Encapsulates behaviour around a primary preferred read preference.
@since 2.0.0
Select a primary node from the cluster. If no primary node is available then attempt to select a secondary. If no secondary is available then an exception will be raised.
@example Prefer to with_node a primary node from the cluster.
preference.with_node(cluster) do |node| node.command(ismaster: 1) end
@note If tag sets are provided then secondary with_nodeion will need to
match the provided tags.
@param [ Cluster ] cluster The cluster of nodes to select from. @param [ Proc ] block The block to execute on the node.
@raise [ Errors::ConnectionFailure ] If no primary or secondary node was
available in the cluster.
@return [ Object ] The result of the block.
@since 2.0.0