GenerationIdChecksum (OpenDJ Public API Javadoc 7.2.5-20240524201627-49403efab3a3556b93d8ee62f263ca29a7e752ef Documentation)

java.lang.Object
- org.opends.server.replication.plugin.GenerationIdChecksum

All Implemented Interfaces:

Checksum
```
public class GenerationIdChecksum
extends Object
implements Checksum
```
This class computes the generation id used for a replication domain. It is a checksum based on some special entries/attributes of the domain. The written stream to this class is the LDIF representation of the entries we are interested in for computing the generation id. The current implementation simply does the sum of each written byte and stores the value in a long. We do not care about the cycling long as the probability of 2 data sets having the same checksum is very low.

Field Summary

Fields
Modifier and Type Field Description

static long EMPTY_BACKEND_GENERATION_ID
This is the generation id for an empty backend.

Constructor Summary

Constructors
Constructor Description

GenerationIdChecksum()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`getValue()`
`void`	`reset()`
`void`	`update(byte[] b, int off, int len)`
`void`	`update(int b)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.zip.Checksum
update, update

- Field Detail
  - EMPTY_BACKEND_GENERATION_ID
```
public static final long EMPTY_BACKEND_GENERATION_ID
```
    This is the generation id for an empty backend.
    It corresponds to a backend entry count of zero, i.e. we encode 0 in ASCII which gives 48.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - GenerationIdChecksum
```
public GenerationIdChecksum()
```
- Method Detail
  - update
```
public void update(int b)
```
    Specified by:
    
    update in interface Checksum
  - update
```
public void update(byte[] b,
                   int off,
                   int len)
```
    Specified by:
    
    update in interface Checksum
  - getValue
```
public long getValue()
```
    Specified by:
    
    getValue in interface Checksum
  - reset
```
public void reset()
```
    Specified by:
    
    reset in interface Checksum