com.hazelcast.internal.cluster

Interface ClusterVersionListener

All Known Implementing Classes:

ClusterWideConfigurationService, InternalPartitionServiceImpl

public interface ClusterVersionListener

Listeners interested in acting upon cluster version update should implement this interface. Services registered with the Hazelcast ServiceManager which implement this interface do not have have to register themselves, as their onClusterVersionChange(Version) method will be invoked automatically. Other listeners have to register themselves with NodeExtension.registerListener(Object). Upon registration, the listener's onClusterVersionChange(Version) method will be invoked once with the current value of the cluster version.

Since:

3.8

See Also:

Cluster.getClusterVersion(), Cluster.changeClusterVersion(Version)

Method Summary

Modifier and Type	Method and Description
void	onClusterVersionChange(Version newVersion) Invoked on registered listeners after the new cluster version has been applied.

Method Detail

onClusterVersionChange

void onClusterVersionChange(Version newVersion)

Invoked on registered listeners after the new cluster version has been applied. Listeners are executed synchronously immediately after ClusterStateManager#version has been updated and while the cluster service lock ClusterServiceImpl#lock is still locked, as part of the commit phase of the transaction changing the cluster version. Unhandled exceptions from listeners implementation will break the new version commit and a slow implementation will stall the system and may cause a transaction timeout. If new cluster version is null and property GroupProperty.INIT_CLUSTER_VERSION is set, the version set by this property will be provided as argument to the listener. If neither are set, running node's codebase version will be used.

Parameters:

newVersion - the new version