com.sleepycat.db
Class LogSequenceNumber

java.lang.Object
  com.sleepycat.db.LogSequenceNumber

public class LogSequenceNumber
extends Object

The LogSequenceNumber object is a log sequence number which specifies a unique location in a log file. A LogSequenceNumber consists of two unsigned 32-bit integers -- one specifies the log file number, and the other specifies the offset in the log file.

LogSequenceNumber

public LogSequenceNumber(int file,
                         int offset)

Construct a LogSequenceNumber with the specified file and offset.

Parameters:

file - The log file number.

offset - The log file offset.

LogSequenceNumber

public LogSequenceNumber()

Construct an uninitialized LogSequenceNumber.

getFile

public int getFile()

Return the file number component of the LogSequenceNumber.

Returns:

The file number component of the LogSequenceNumber.

getOffset

public int getOffset()

Return the file offset component of the LogSequenceNumber.

Returns:

The file offset component of the LogSequenceNumber.

compare

public static int compare(LogSequenceNumber lsn1,
                          LogSequenceNumber lsn2)

Compare two LogSequenceNumber objects.

This method returns 0 if the two LogSequenceNumber objects are equal, 1 if lsn0 is greater than lsn1, and -1 if lsn0 is less than lsn1.

Parameters:

lsn1 - The first LogSequenceNumber object to be compared.

lsn2 - The second LogSequenceNumber object to be compared.

Returns:

0 if the two LogSequenceNumber objects are equal, 1 if lsn1 is greater than lsn2, and -1 if lsn1 is less than lsn2.