Package org.apache.druid.discovery

Interface DruidNodeDiscovery.Listener

Enclosing interface:
DruidNodeDiscovery
public static interface DruidNodeDiscovery.Listener
Listener for watching nodes in a DruidNodeDiscovery instance obtained via DruidNodeDiscoveryProvider.getXXX(). DruidNodeDiscovery implementation should assume that Listener is not thread-safe and never call methods in Listener concurrently. Implementation of Listener must ensure to not do any time consuming work or block in any of the methods.

  • Method Details

    • nodesAdded

      void nodesAdded(Collection<DiscoveryDruidNode> nodes)

    • nodesRemoved

      void nodesRemoved(Collection<DiscoveryDruidNode> nodes)

    • nodeViewInitialized

      default void nodeViewInitialized()
      Called once when the underlying cache in the DruidNodeDiscovery implementation has been initialized.

    • nodeViewInitializedTimedOut

      default void nodeViewInitializedTimedOut()
      Called once when the underlying cache in the DruidNodeDiscovery implementation has timed out trying to initialize.