Package org.apache.solr.common.cloud

Interface DocCollectionWatcher

public interface DocCollectionWatcher
Callback registered with ZkStateReader.registerDocCollectionWatcher(String, DocCollectionWatcher) and called whenever the DocCollection changes.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    onStateChanged(org.apache.solr.common.cloud.DocCollection collection)
    Called when the collection we are registered against has a change of state.

  • Method Details

    • onStateChanged

      boolean onStateChanged(org.apache.solr.common.cloud.DocCollection collection)
      Called when the collection we are registered against has a change of state.

      Note that, due to the way Zookeeper watchers are implemented, a single call may be the result of several state changes. Also, multiple calls to this method can be made with the same state, ie. without any new updates.

      Parameters:
      collection - the new collection state (may be null if the collection has been deleted)
      Returns:
      true if the watcher should be removed