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The Java Embedded Database Class BackupInfo

BackupInfo defines the eXtremeDB Incremental Backup settings.

For an overview see page Java Database Class

Class Definition

 
    public static class BackupInfo 
    {
        public int        protocolVersion;
        public BackupType type;
        public int        flags;
        public int        backupNo;
        public long       timestamp;
        public long       size;
        public long       offset;
        public int        crc;
        public long       transNo;
        public int        memPageSize;
        public int        diskPageSize;
        public long       nPagesTotal;
        public String     dbName;
        public String     label;
         
        public BackupInfo(int protocolVersion, BackupType type, int flags, 
                    int backupNo, long timestamp, long size, long offset, 
                    int crc, long transNo, int memPageSize, int diskPageSize, 
                    long nPagesTotal, String dbName, String label)
        {
            this.protocolVersion     = protocolVersion;
            this.type                = type;
            this.flags               = flags;
            this.backupNo            = backupNo;
            this.timestamp           = timestamp;
            this.size                = size;
            this.offset              = offset;
            this.crc                 = crc;
            this.transNo             = transNo;
            this.memPageSize         = memPageSize;
            this.diskPageSize        = diskPageSize;
            this.nPagesTotal         = nPagesTotal;
            this.dbName              = dbName;
            this.label               = label;
        }
    };

Definitions:

protocolVersion

type

The type of backup record; one of the following:

   
  public enum BackupType {
    Auto, Snapshot, Incremental
  };

where type has the following effect:

`Auto`	Automatic selection of a snapshot or incremental record depending on the content of the backup file. If there is no snapshot in the file yet the backup process will create one; otherwise a partial backup record is created
`Snapshot`	An image of the entire database; must be done at least once
`Incremental`	A partial image of the database. Contains only differences in the database content between two consecutive backup records.

flags

The backup flags; a combination of the following:

   
  public static final int BACKUP_FLAG_COMPRESSED = 1;
  public static final int BACKUP_FLAG_ENCRYPTED  = 2;

where the flags have the following effect:

`BACKUP_FLAG_COMPRESSED`	Compression is applied to all backup records
`BACKUP_FLAG_ENCRYPTED`	All backup records are encrypted

backupNo A sequential number

timestamp The backup timestamp

size The size of the backup segment including the header (mco_backup_info_t)

offset The offset in the file

crc The backup record checksum

transNo The last transaction number

memPageSize The size of the memory page for the database

diskPageSize The size of the persistent storage page for the database

nPagesTotal The total number of memory pages

dbName The name of the database

label The backup record label