org.apache.flink.runtime.io.disk

Class ChannelReaderInputViewIterator<E>

java.lang.Object

org.apache.flink.runtime.io.disk.ChannelReaderInputViewIterator<E>

All Implemented Interfaces:

MutableObjectIterator<E>

public class ChannelReaderInputViewIterator<E>
extends Object
implements MutableObjectIterator<E>

A simple iterator over the input read though an I/O channel.

Constructor Summary

Constructors

Constructor and Description
ChannelReaderInputViewIterator(AbstractChannelReaderInputView inView, List<MemorySegment> freeMemTarget, TypeSerializer<E> accessors)
ChannelReaderInputViewIterator(BlockChannelReader<MemorySegment> reader, LinkedBlockingQueue<MemorySegment> returnQueue, List<MemorySegment> segments, List<MemorySegment> freeMemTarget, TypeSerializer<E> accessors, int numBlocks)
ChannelReaderInputViewIterator(IOManager ioAccess, FileIOChannel.ID channel, LinkedBlockingQueue<MemorySegment> returnQueue, List<MemorySegment> segments, List<MemorySegment> freeMemTarget, TypeSerializer<E> accessors, int numBlocks)
ChannelReaderInputViewIterator(IOManager ioAccess, FileIOChannel.ID channel, List<MemorySegment> segments, List<MemorySegment> freeMemTarget, TypeSerializer<E> accessors, int numBlocks)

Method Summary

Modifier and Type	Method and Description
E	next() Gets the next element from the collection.
E	next(E reuse) Gets the next element from the collection.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChannelReaderInputViewIterator

public ChannelReaderInputViewIterator(IOManager ioAccess,
                                      FileIOChannel.ID channel,
                                      List<MemorySegment> segments,
                                      List<MemorySegment> freeMemTarget,
                                      TypeSerializer<E> accessors,
                                      int numBlocks)
                               throws IOException

Throws:

IOException

ChannelReaderInputViewIterator

public ChannelReaderInputViewIterator(IOManager ioAccess,
                                      FileIOChannel.ID channel,
                                      LinkedBlockingQueue<MemorySegment> returnQueue,
                                      List<MemorySegment> segments,
                                      List<MemorySegment> freeMemTarget,
                                      TypeSerializer<E> accessors,
                                      int numBlocks)
                               throws IOException

Throws:

IOException

ChannelReaderInputViewIterator

public ChannelReaderInputViewIterator(BlockChannelReader<MemorySegment> reader,
                                      LinkedBlockingQueue<MemorySegment> returnQueue,
                                      List<MemorySegment> segments,
                                      List<MemorySegment> freeMemTarget,
                                      TypeSerializer<E> accessors,
                                      int numBlocks)
                               throws IOException

Throws:

IOException

ChannelReaderInputViewIterator

public ChannelReaderInputViewIterator(AbstractChannelReaderInputView inView,
                                      List<MemorySegment> freeMemTarget,
                                      TypeSerializer<E> accessors)

Method Detail

next

public E next(E reuse)
       throws IOException

Description copied from interface: MutableObjectIterator

Gets the next element from the collection. The contents of that next element is put into the given reuse object, if the type is mutable.

Specified by:

next in interface MutableObjectIterator<E>

Parameters:

reuse - The target object into which to place next element if E is mutable.

Returns:

The filled object or null if the iterator is exhausted.

Throws:

IOException - Thrown, if a problem occurred in the underlying I/O layer or in the serialization / deserialization logic

next

public E next()
       throws IOException

Description copied from interface: MutableObjectIterator

Gets the next element from the collection. The iterator implementation must obtain a new instance.

Specified by:

next in interface MutableObjectIterator<E>

Returns:

The object or null if the iterator is exhausted.

Throws:

IOException - Thrown, if a problem occurred in the underlying I/O layer or in the serialization / deserialization logic