CacheTopologyHandler (Infinispan Core 11.0.18.Final API)

```
public interface CacheTopologyHandler
```
The link between LocalTopologyManager and StateTransferManager.

Since:

5.2

Author:

Dan Berindei

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`CompletionStage<Void>`	`rebalance(CacheTopology cacheTopology)`	Invoked when state transfer has to be started.
`CompletionStage<Void>`	`updateConsistentHash(CacheTopology cacheTopology)`	Invoked when the CH has to be immediately updated because of a leave or when the state transfer has completed and we have to install a permanent CH (pendingCH == null).

- Method Detail
  - updateConsistentHash
```
CompletionStage<Void> updateConsistentHash(CacheTopology cacheTopology)
```
    Invoked when the CH has to be immediately updated because of a leave or when the state transfer has completed and we have to install a permanent CH (pendingCH == null). A state transfer is not always required.
  - rebalance
```
CompletionStage<Void> rebalance(CacheTopology cacheTopology)
```
    Invoked when state transfer has to be started. The caller will not consider the local rebalance done when this method returns. Instead, the handler will have to call LocalTopologyManager.confirmRebalancePhase(String, int, int, Throwable)