org.elasticsearch.spark.sql.streaming

Class NullMetadataLog<T>

java.lang.Object

org.elasticsearch.spark.sql.streaming.NullMetadataLog<T>

All Implemented Interfaces:

Serializable, org.apache.spark.sql.execution.streaming.MetadataLog<T>

public class NullMetadataLog<T>
extends Object
implements org.apache.spark.sql.execution.streaming.MetadataLog<T>, scala.Serializable

A null object style metadata log that discards incoming data, and otherwise acts like an empty log.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NullMetadataLog()

Method Summary

Modifier and Type	Method and Description
boolean	add(long batchId, T metadata)
scala.Option<T>	get(long batchId)
scala.Tuple2<Object,T>[]	get(scala.Option<Object> startId, scala.Option<Object> endId)
scala.Option<scala.Tuple2<Object,T>>	getLatest()
void	purge(long thresholdBatchId)

Methods inherited from class java.lang.Object

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

Constructor Detail

NullMetadataLog

public NullMetadataLog()

Method Detail

add

public boolean add(long batchId,
                   T metadata)

Specified by:

add in interface org.apache.spark.sql.execution.streaming.MetadataLog<T>

get

public scala.Option<T> get(long batchId)

Specified by:

get in interface org.apache.spark.sql.execution.streaming.MetadataLog<T>

get

public scala.Tuple2<Object,T>[] get(scala.Option<Object> startId,
                                    scala.Option<Object> endId)

Specified by:

get in interface org.apache.spark.sql.execution.streaming.MetadataLog<T>

getLatest

public scala.Option<scala.Tuple2<Object,T>> getLatest()

Specified by:

getLatest in interface org.apache.spark.sql.execution.streaming.MetadataLog<T>

purge

public void purge(long thresholdBatchId)

Specified by:

purge in interface org.apache.spark.sql.execution.streaming.MetadataLog<T>