org.elasticsearch.index.translog

Class ImmutableTranslogReader

java.lang.Object

org.elasticsearch.index.translog.TranslogReader

org.elasticsearch.index.translog.ImmutableTranslogReader

All Implemented Interfaces:

Closeable, AutoCloseable, Comparable<TranslogReader>

Direct Known Subclasses:

LegacyTranslogReader

public class ImmutableTranslogReader
extends TranslogReader

a translog reader which is fixed in length

Field Summary

Fields

Modifier and Type	Field and Description
protected long	length

Fields inherited from class org.elasticsearch.index.translog.TranslogReader

channel, channelReference, closed, firstOperationOffset, generation, UNKNOWN_OP_COUNT

Constructor Summary

Constructors

Constructor and Description
ImmutableTranslogReader(long generation, org.elasticsearch.index.translog.ChannelReference channelReference, long firstOperationOffset, long length, int totalOperations) Create a snapshot of translog file channel.

Method Summary

Methods

Modifier and Type	Method and Description
TranslogReader	clone()
org.elasticsearch.index.translog.Checkpoint	getInfo()
protected ImmutableTranslogReader	newReader(long generation, org.elasticsearch.index.translog.ChannelReference channelReference, long offset, long length, int totalOperations)
protected void	readBytes(ByteBuffer buffer, long position) reads an operation at the given position into the given buffer.
long	sizeInBytes()
int	totalOperations()

Methods inherited from class org.elasticsearch.index.translog.TranslogReader

close, compareTo, ensureOpen, getFirstOperationOffset, getGeneration, isClosed, newReaderSnapshot, newSnapshot, open, path, read, read, toString

Methods inherited from class java.lang.Object

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

Field Detail

length

protected final long length

Constructor Detail

ImmutableTranslogReader

public ImmutableTranslogReader(long generation,
                       org.elasticsearch.index.translog.ChannelReference channelReference,
                       long firstOperationOffset,
                       long length,
                       int totalOperations)

Create a snapshot of translog file channel. The length parameter should be consistent with totalOperations and point at the end of the last operation in this snapshot.

Method Detail

clone

public final TranslogReader clone()

Overrides:

clone in class Object

newReader

protected ImmutableTranslogReader newReader(long generation,
                                org.elasticsearch.index.translog.ChannelReference channelReference,
                                long offset,
                                long length,
                                int totalOperations)

sizeInBytes

public long sizeInBytes()

Specified by:

sizeInBytes in class TranslogReader

totalOperations

public int totalOperations()

Specified by:

totalOperations in class TranslogReader

readBytes

protected void readBytes(ByteBuffer buffer,
             long position)
                  throws IOException

reads an operation at the given position into the given buffer.

Specified by:

readBytes in class TranslogReader

Throws:

IOException

getInfo

public org.elasticsearch.index.translog.Checkpoint getInfo()