Package io.hekate.cluster.event

Class ClusterChangeEvent

java.lang.Object

io.hekate.cluster.event.ClusterEventBase

io.hekate.cluster.event.ClusterChangeEvent

All Implemented Interfaces:

ClusterEvent, HekateSupport

public class ClusterChangeEvent
extends ClusterEventBase

Cluster topology change event.

This event gets fired by the ClusterService every time whenever cluster topology changes are detected. This event includes information about all new nodes that joined the cluster and all old nodes that left the cluster.

For more details about cluster events handling please see the documentation of ClusterEventListener interface.

See Also:

ClusterEventListener

Constructor Summary

Constructors

Constructor	Description
ClusterChangeEvent(ClusterTopology oldTopology, ClusterTopology newTopology, Set<ClusterNode> failed, HekateSupport hekate)	Constructs a new instance by comparing old and new cluster topologies.
ClusterChangeEvent(ClusterTopology topology, List<ClusterNode> added, List<ClusterNode> removed, List<ClusterNode> failed, HekateSupport hekate)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
List<ClusterNode>	added()	Returns the list of new nodes that joined the cluster.
ClusterChangeEvent	asChange()	Returns this instance.
List<ClusterNode>	failed()	Returns the list of failed nodes.
List<ClusterNode>	removed()	Returns the list of nodes that left the cluster.
String	toString()
ClusterEventType	type()	Returns ClusterEventType.CHANGE.

Methods inherited from class io.hekate.cluster.event.ClusterEventBase

asJoin, asLeave, attach, future, hekate, topology

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ClusterChangeEvent

public ClusterChangeEvent(ClusterTopology topology,
                          List<ClusterNode> added,
                          List<ClusterNode> removed,
                          List<ClusterNode> failed,
                          HekateSupport hekate)

Constructs a new instance.

Parameters:

topology - Topology.

added - List of newly joined nodes (see added()).

removed - List of nodes that left the cluster (see removed()).

failed - List of failed nodes (see failed()).

hekate - Delegate for ClusterEventBase.hekate().

ClusterChangeEvent

public ClusterChangeEvent(ClusterTopology oldTopology,
                          ClusterTopology newTopology,
                          Set<ClusterNode> failed,
                          HekateSupport hekate)

Constructs a new instance by comparing old and new cluster topologies.

Parameters:

oldTopology - Old topology.

newTopology - New topology.

failed - Failed nodes (see failed()).

hekate - Delegate for ClusterEventBase.hekate().

Method Detail

added

public List<ClusterNode> added()

Returns the list of new nodes that joined the cluster.

Returns:

List of new nodes that joined the cluster.

removed

public List<ClusterNode> removed()

Returns the list of nodes that left the cluster.

This list contains nodes that left the cluster normally and those that were considered to be failed and forcefully removed.

For the list of nodes that were forcefully removed from the cluster by the failure detection logic please see the failed() method.

Returns:

List of nodes that left the cluster.

failed

public List<ClusterNode> failed()

Returns the list of failed nodes.

This list contains those nodes that were removed from the cluster by the failure detection logic (see FailureDetector).

Returns:

List of failed nodes.

type

public ClusterEventType type()

Returns ClusterEventType.CHANGE.

Returns:

ClusterEventType.CHANGE.

asChange

public ClusterChangeEvent asChange()

Returns this instance.

Specified by:

asChange in interface ClusterEvent

Overrides:

asChange in class ClusterEventBase

Returns:

This instance.

toString

public String toString()

Overrides:

toString in class Object