MigrationListener (Hazelcast Root 5.4.0-SNAPSHOT API)

All Superinterfaces:

java.util.EventListener
```
public interface MigrationListener
extends java.util.EventListener
```
MigrationListener provides the ability to listen to partition migration process and events.

See Also:

Partition, PartitionService, MigrationState, ReplicaMigrationEvent

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`migrationFinished(MigrationState state)`	Called when the migration process finishes.
`void`	`migrationStarted(MigrationState state)`	Called when the migration process starts.
`void`	`replicaMigrationCompleted(ReplicaMigrationEvent event)`	Called when a partition replica migration is completed successfully.
`void`	`replicaMigrationFailed(ReplicaMigrationEvent event)`	Called when a partition replica migration is failed.

- Method Detail
  - migrationStarted
```
void migrationStarted(MigrationState state)
```
    Called when the migration process starts. A migration process consists of a group of partition replica migrations which are planned together.
    When migration process is completed, migrationFinished(MigrationState) is called.
    
    Parameters:
    
    state - Plan of the migration process
  - migrationFinished
```
void migrationFinished(MigrationState state)
```
    Called when the migration process finishes. This event denotes ending of migration process which is started by migrationStarted(MigrationState).
    Not all of the planned migrations have to be completed. Some of them can be skipped because of a newly created migration plan.
    If migration process coordinator member (generally the oldest member in cluster) crashes before migration process ends, then this method may not be called at all.
    
    Parameters:
    
    state - Result of the migration process
  - replicaMigrationCompleted
```
void replicaMigrationCompleted(ReplicaMigrationEvent event)
```
    Called when a partition replica migration is completed successfully.
    
    Parameters:
    
    event - the event for the partition replica migration
  - replicaMigrationFailed
```
void replicaMigrationFailed(ReplicaMigrationEvent event)
```
    Called when a partition replica migration is failed.
    
    Parameters:
    
    event - the event for the partition replica migration