org.apache.spark.streaming.dstream

Class ConstantInputDStream<T>

Object

org.apache.spark.streaming.dstream.DStream<T>

org.apache.spark.streaming.dstream.InputDStream<T>

org.apache.spark.streaming.dstream.ConstantInputDStream<T>

All Implemented Interfaces:

java.io.Serializable, Logging

public class ConstantInputDStream<T>
extends InputDStream<T>

An input stream that always returns the same RDD on each timestep. Useful for testing.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ConstantInputDStream(StreamingContext ssc_, RDD<T> rdd, scala.reflect.ClassTag<T> evidence$1)

Method Summary

Methods

Modifier and Type	Method and Description
scala.Option<RDD<T>>	compute(Time validTime) Method that generates a RDD for the given time
void	start() Method called to start receiving data.
void	stop() Method called to stop receiving data.

Methods inherited from class org.apache.spark.streaming.dstream.InputDStream

dependencies, isTimeValid, lastValidTime, slideDuration

Methods inherited from class org.apache.spark.streaming.dstream.DStream

cache, checkpoint, checkpointData, checkpointDuration, clearCheckpointData, clearMetadata, context, count, countByValue, countByValueAndWindow, countByWindow, creationSite, filter, flatMap, foreach, foreach, foreachRDD, foreachRDD, generatedRDDs, generateJob, getCreationSite, getOrCompute, glom, graph, initialize, isInitialized, map, mapPartitions, mustCheckpoint, parentRememberDuration, persist, persist, print, reduce, reduceByWindow, reduceByWindow, register, remember, rememberDuration, repartition, restoreCheckpointData, saveAsObjectFiles, saveAsTextFiles, setContext, setGraph, slice, slice, ssc, storageLevel, transform, transform, transformWith, transformWith, union, updateCheckpointData, validate, window, window, zeroTime

Methods inherited from class Object

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

Methods inherited from interface org.apache.spark.Logging

initializeIfNecessary, initializeLogging, isTraceEnabled, log_, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning

Constructor Detail

ConstantInputDStream

public ConstantInputDStream(StreamingContext ssc_,
                    RDD<T> rdd,
                    scala.reflect.ClassTag<T> evidence$1)

Method Detail

start

public void start()

Description copied from class: InputDStream

Method called to start receiving data. Subclasses must implement this method.

Specified by:

start in class InputDStream<T>

stop

public void stop()

Description copied from class: InputDStream

Method called to stop receiving data. Subclasses must implement this method.

Specified by:

stop in class InputDStream<T>

compute

public scala.Option<RDD<T>> compute(Time validTime)

Description copied from class: DStream

Method that generates a RDD for the given time

Specified by:

compute in class DStream<T>