io.debezium.connector.postgresql.connection

Class Lsn

java.lang.Object

io.debezium.connector.postgresql.connection.Lsn

All Implemented Interfaces:

Comparable<Lsn>

public class Lsn
extends Object
implements Comparable<Lsn>

Abstraction of PostgreSQL log sequence number, adapted from LogSequenceNumber.

Author:

Jiri Pechanec

Field Summary

Fields

Modifier and Type	Field and Description
static Lsn	INVALID_LSN Zero is used indicate an invalid pointer.
private long	value

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Lsn(long value)

Method Summary

Modifier and Type	Method and Description
org.postgresql.replication.LogSequenceNumber	asLogSequenceNumber()
long	asLong()
String	asString()
int	compareTo(Lsn o)
boolean	equals(Object o)
int	hashCode()
boolean	isValid()
String	toString()
static Lsn	valueOf(org.postgresql.replication.LogSequenceNumber value)
static Lsn	valueOf(Long value)
static Lsn	valueOf(String strValue) Create LSN instance by string represent LSN.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INVALID_LSN

public static final Lsn INVALID_LSN

Zero is used indicate an invalid pointer. Bootstrap skips the first possible WAL segment, initializing the first WAL page at XLOG_SEG_SIZE, so no XLOG record can begin at zero.

value

private final long value

Constructor Detail

Lsn

private Lsn(long value)

Method Detail

valueOf

public static Lsn valueOf(Long value)

Parameters:

value - numeric represent position in the write-ahead log stream

Returns:

not null LSN instance

valueOf

public static Lsn valueOf(org.postgresql.replication.LogSequenceNumber value)

Parameters:

value - PostgreSQL JDBC driver domain type representing position in the write-ahead log stream

Returns:

not null LSN instance

valueOf

public static Lsn valueOf(String strValue)

Create LSN instance by string represent LSN.

Parameters:

strValue - not null string as two hexadecimal numbers of up to 8 digits each, separated by a slash. For example 16/3002D50, 0/15D68C50

Returns:

not null LSN instance where if specified string represent have not valid form INVALID_LSN

asLong

public long asLong()

Returns:

Long represent position in the write-ahead log stream

asLogSequenceNumber

public org.postgresql.replication.LogSequenceNumber asLogSequenceNumber()

Returns:

PostgreSQL JDBC driver representation of position in the write-ahead log stream

asString

public String asString()

Returns:

String represent position in the write-ahead log stream as two hexadecimal numbers of up to 8 digits each, separated by a slash. For example 16/3002D50, 0/15D68C50

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

isValid

public boolean isValid()

toString

public String toString()

Overrides:

toString in class Object

compareTo

public int compareTo(Lsn o)

Specified by:

compareTo in interface Comparable<Lsn>