Package org.apache.iotdb.db.wal.io

Class WALMetaData

java.lang.Object

org.apache.iotdb.db.wal.io.WALMetaData

All Implemented Interfaces:

SerializedSize

public class WALMetaData
extends java.lang.Object
implements SerializedSize

Metadata exists at the end of each wal file, including each entry's size, search index of first entry and the number of entries.

Constructor Summary

Constructors

Constructor	Description
WALMetaData()
WALMetaData(long firstSearchIndex, java.util.List<java.lang.Integer> buffersSize)

Method Summary

Modifier and Type	Method	Description
void	add(int size, long searchIndex)
void	addAll(WALMetaData metaData)
static WALMetaData	deserialize(java.nio.ByteBuffer buffer)
java.util.List<java.lang.Integer>	getBuffersSize()
long	getFirstSearchIndex()
void	serialize(java.nio.ByteBuffer buffer)
int	serializedSize()	Calculate size after serialization.

Methods inherited from class java.lang.Object

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

Constructor Detail

WALMetaData

public WALMetaData()

WALMetaData

public WALMetaData(long firstSearchIndex,
                   java.util.List<java.lang.Integer> buffersSize)

Method Detail

add

public void add(int size,
                long searchIndex)

addAll

public void addAll(WALMetaData metaData)

serializedSize

public int serializedSize()

Description copied from interface: SerializedSize

Calculate size after serialization.

Specified by:

serializedSize in interface SerializedSize

Returns:

bytes number

serialize

public void serialize(java.nio.ByteBuffer buffer)

deserialize

public static WALMetaData deserialize(java.nio.ByteBuffer buffer)

getBuffersSize

public java.util.List<java.lang.Integer> getBuffersSize()

getFirstSearchIndex

public long getFirstSearchIndex()