com.bigdata.io.writecache

Class WriteCache.RecordMetadata

java.lang.Object

com.bigdata.io.writecache.WriteCache.RecordMetadata

Enclosing class:

WriteCache

public static class WriteCache.RecordMetadata
extends Object

The metadata associated with a record in the WriteCache.

Field Summary

Fields

Modifier and Type	Field and Description
int	bufferOffset The offset within the WriteCache's backing ByteBuffer of the start of the record.
long	fileOffset The offset of the record in the file.
int	latchedAddr The RWStore latched address for the record.
int	recordLength The length of the record in bytes as it will be written on the channel.

Constructor Summary

Constructors

Constructor and Description
WriteCache.RecordMetadata(long fileOffset, int bufferOffset, int recordLength, int latchedAddr)

Method Summary

Methods

Modifier and Type	Method and Description
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

fileOffset

public final long fileOffset

The offset of the record in the file. The offset may be relative to a base offset known to the writeOnChannel() implementation.

bufferOffset

public final int bufferOffset

The offset within the WriteCache's backing ByteBuffer of the start of the record.

recordLength

public final int recordLength

The length of the record in bytes as it will be written on the channel. If checksums are being written, then the length of the record has already been incorporated into this value.

latchedAddr

public final int latchedAddr

The RWStore latched address for the record. This can be used to recover the FixedAllocator. This field is only required for the RWStore and then only for HA.

Constructor Detail

WriteCache.RecordMetadata

public WriteCache.RecordMetadata(long fileOffset,
                         int bufferOffset,
                         int recordLength,
                         int latchedAddr)

Method Detail

toString

public String toString()

Overrides:

toString in class Object