Package org.apache.solr.common.cloud
Interface DocCollectionWatcher
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public interface DocCollectionWatcher
Callback registered withZkStateReader.registerDocCollectionWatcher(String, DocCollectionWatcher)
and called whenever the DocCollection changes.
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Method Summary
All Methods Instance Methods Abstract Methods 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.
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Method Detail
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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
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