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

Class MutableRecordReader<T extends org.apache.flink.core.io.IOReadableWritable>

java.lang.Object

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

org.apache.flink.runtime.io.network.api.reader.MutableRecordReader<T>

Type Parameters:

T - The type of the record that is read.

All Implemented Interfaces:

MutableReader<T>, ReaderBase

public class MutableRecordReader<T extends org.apache.flink.core.io.IOReadableWritable>
extends AbstractReader
implements MutableReader<T>

Implementation of the record-oriented reader for mutable record types.

Field Summary

Fields inherited from class org.apache.flink.runtime.io.network.api.reader.AbstractReader

inputGate

Constructor Summary

Constructors

Constructor	Description
MutableRecordReader(InputGate inputGate, String[] tmpDirectories)	Creates a new MutableRecordReader that de-serializes records from the given input gate and can spill partial records to disk, if they grow large.

Method Summary

Modifier and Type	Method	Description
void	clearBuffers()
protected boolean	getNextRecord(T target)
boolean	next(T target)

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

handleEvent, hasReachedEndOfSuperstep, isFinished, publish, registerTaskEventListener, sendTaskEvent, setIterativeReader, startNextSuperstep

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.runtime.io.network.api.reader.ReaderBase

hasReachedEndOfSuperstep, isFinished, registerTaskEventListener, sendTaskEvent, setIterativeReader, startNextSuperstep

Constructor Details

MutableRecordReader

public MutableRecordReader(InputGate inputGate,
 String[] tmpDirectories)

Creates a new MutableRecordReader that de-serializes records from the given input gate and can spill partial records to disk, if they grow large.

Parameters:

inputGate - The input gate to read from.

tmpDirectories - The temp directories. USed for spilling if the reader concurrently reconstructs multiple large records.

Method Details

next

public boolean next(T target)
             throws IOException,
InterruptedException

Specified by:

next in interface MutableReader<T extends org.apache.flink.core.io.IOReadableWritable>

Throws:

IOException

InterruptedException

clearBuffers

public void clearBuffers()

Specified by:

clearBuffers in interface MutableReader<T extends org.apache.flink.core.io.IOReadableWritable>

getNextRecord

protected boolean getNextRecord(T target)
                         throws IOException,
InterruptedException

Throws:

IOException

InterruptedException