```
public class PaxosBallotTracker
extends java.lang.Object
```
Tracks the highest paxos ballot we've seen, and the lowest ballot we can accept. During paxos repair, the coordinator gets the highest ballot seen by each participant. At the end of repair, that high ballot is set as the new low bound. Combined with paxos repair during topology changes, this eliminates the possibility of new nodes accepting ballots that are before the most recently accepted ballot for a key.

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`flush()`
`File`	`getDirectory()`
`Ballot`	`getHighBound()`
`Ballot`	`getLowBound()`
`static PaxosBallotTracker`	`load(File directory)`
`void`	`onUpdate(Row row)`
`void`	`truncate()`
`static void`	`truncate(File directory)`
`void`	`updateLowBound(Ballot update)`

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

public static void truncate(File directory)
                     throws java.io.IOException

public static PaxosBallotTracker load(File directory)
                               throws java.io.IOException

public void flush()
           throws java.io.IOException

public void updateLowBound(Ballot update)
                    throws java.io.IOException

Class PaxosBallotTracker