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 and Description
boolean	onStateChanged(DocCollection collection) Called when the collection we are registered against has a change of state.

Method Detail

onStateChanged

boolean onStateChanged(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