org.apache.flink.runtime.io.network.api

Class AbstractUnionRecordReader<T extends IOReadableWritable>

java.lang.Object

org.apache.flink.runtime.io.network.api.AbstractRecordReader

org.apache.flink.runtime.io.network.api.AbstractUnionRecordReader<T>

All Implemented Interfaces:

ReaderBase, RecordAvailabilityListener<T>

Direct Known Subclasses:

MutableUnionRecordReader, UnionRecordReader

public abstract class AbstractUnionRecordReader<T extends IOReadableWritable>
extends AbstractRecordReader
implements RecordAvailabilityListener<T>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractUnionRecordReader(MutableRecordReader<T>[] recordReaders) Constructs a new mutable union record reader.

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	getNextRecord(T target)
boolean	isInputClosed()
void	publishEvent(AbstractTaskEvent event) Publishes an event.
void	reportRecordAvailability(InputGate<T> inputGate) This method is called by an input gate when one of its connected input channels has at least one record available for reading.

Methods inherited from class org.apache.flink.runtime.io.network.api.AbstractRecordReader

handleEvent, hasReachedEndOfSuperstep, incrementEndOfSuperstepEventAndCheck, setIterative, startNextSuperstep, subscribeToEvent, unsubscribeFromEvent

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractUnionRecordReader

protected AbstractUnionRecordReader(MutableRecordReader<T>[] recordReaders)

Constructs a new mutable union record reader.

Parameters:

recordReaders - the individual mutable record readers whose input is used to construct the union

Method Detail

isInputClosed

public boolean isInputClosed()

Specified by:

isInputClosed in interface ReaderBase

publishEvent

public void publishEvent(AbstractTaskEvent event)
                  throws IOException,
                         InterruptedException

Description copied from interface: ReaderBase

Publishes an event.

Specified by:

publishEvent in interface ReaderBase

Parameters:

event - the event to be published

Throws:

IOException - thrown if an error occurs while transmitting the event

InterruptedException - thrown if the thread is interrupted while waiting for the event to be published

reportRecordAvailability

public void reportRecordAvailability(InputGate<T> inputGate)

Description copied from interface: RecordAvailabilityListener

This method is called by an input gate when one of its connected input channels has at least one record available for reading.

Specified by:

reportRecordAvailability in interface RecordAvailabilityListener<T extends IOReadableWritable>

Parameters:

inputGate - the input gate which has at least one record available

getNextRecord

protected boolean getNextRecord(T target)
                         throws IOException,
                                InterruptedException

Throws:

IOException

InterruptedException