Package org.apache.pinot.segment.local.realtime.impl.invertedindex

Class RealtimeLuceneIndexRefreshState

java.lang.Object

org.apache.pinot.segment.local.realtime.impl.invertedindex.RealtimeLuceneIndexRefreshState

public class RealtimeLuceneIndexRefreshState
extends Object

This class manages the realtime lucene index readers. Creates a global queue with all the realtime segment lucene index readers across all tables and manages their refresh using RealtimeLuceneIndexReaderRefreshThread TODO: eventually we should explore partitioning this queue on per table basis

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RealtimeLuceneIndexRefreshState.RealtimeLuceneReaders	Since the text index is maintained per TEXT column (similar to other Pinot indexes), there could be multiple lucene indexes for a given segment and therefore there can be multiple realtime lucene readers (one for each index/column) for the particular realtime segment.

Method Summary

Modifier and Type	Method	Description
void	addRealtimeReadersToQueue(RealtimeLuceneIndexRefreshState.RealtimeLuceneReaders readersForRealtimeSegment)
static RealtimeLuceneIndexRefreshState	getInstance()
void	start()	Used by HelixServerStarter during bootstrap to create the singleton instance of this class and start the realtime reader refresh thread.
void	stop()	Used by HelixServerStarter during shutdown.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

start

public void start()

Used by HelixServerStarter during bootstrap to create the singleton instance of this class and start the realtime reader refresh thread.

stop

public void stop()

Used by HelixServerStarter during shutdown. This sets the volatile "stopped" variable to indicate the shutdown to refresh thread. Since refresh thread might be suspended waiting on the condition variable, we signal the condition variable for the refresh thread to wake up, check that shutdown has been initiated and exit.

getInstance

public static RealtimeLuceneIndexRefreshState getInstance()

addRealtimeReadersToQueue

public void addRealtimeReadersToQueue(RealtimeLuceneIndexRefreshState.RealtimeLuceneReaders readersForRealtimeSegment)