io.vertx.core.spi.cluster

## Interface NodeListener

-     public interface NodeListener

  A NodeListener is called when nodes join or leave the cluster
  Author:
    Tim Fox

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `nodeAdded(String nodeID)` A node has been added
    `void` | `nodeLeft(String nodeID)` A node has left

- - ### Method Detail

    - #### nodeAdded

          void nodeAdded(String nodeID)

      A node has been added
      Parameters:
        `nodeID` - The unique ID of the node

    - #### nodeLeft

          void nodeLeft(String nodeID)

      A node has left
      Parameters:
        `nodeID` - The unique ID of the node

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