java.lang.Object
- akka.cluster.ClusterCoreDaemon

All Implemented Interfaces:

Actor, RequiresMessageQueue<UnboundedMessageQueueSemantics>
```
public class ClusterCoreDaemon
extends java.lang.Object
implements Actor, RequiresMessageQueue<UnboundedMessageQueueSemantics>
```
Looks up and returns the remote cluster command connection for the specific address.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`class`	`ClusterCoreDaemon.Ignored$`
`class`	`ClusterCoreDaemon.Merge$`
`class`	`ClusterCoreDaemon.Newer$`
`class`	`ClusterCoreDaemon.Older$`
`static interface`	`ClusterCoreDaemon.ReceiveGossipType`	The types of gossip actions that receive gossip has performed.
`class`	`ClusterCoreDaemon.Same$`

Nested classes/interfaces inherited from interface akka.actor.Actor
Actor.emptyBehavior$, Actor.ignoringBehavior$

Constructor Summary

Constructors
Constructor Description

ClusterCoreDaemon(ActorRef publisher, JoinConfigCompatChecker joinConfigCompatChecker)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`akka$actor$Actor$_setter_$context_$eq(ActorContext x$1)`
`protected void`	`akka$actor$Actor$_setter_$self_$eq(ActorRef x$1)`	The 'self' field holds the ActorRef for this actor.
`void`	`assertLatestGossip()`
`void`	`becomeInitialized()`
`void`	`becomeUninitialized()`
`void`	`cleanupExitingConfirmed()`
`Cluster`	`cluster()`
`ActorContext`	`context()`	Scala API: Stores the context for this actor, including self, and sender.
`CoordinatedShutdown`	`coordShutdown()`
`void`	`downing(Address address)`	State transition to DOWN.
`void`	`exitingCompleted()`
`scala.collection.immutable.Set<UniqueAddress>`	`exitingConfirmed()`
`void`	`exitingConfirmed_$eq(scala.collection.immutable.Set<UniqueAddress> x$1)`
`boolean`	`exitingTasksInProgress()`
`void`	`exitingTasksInProgress_$eq(boolean x$1)`
`Cancellable`	`failureDetectorReaperTask()`
`void`	`gossip()`	Initiates a new round of gossip.
`void`	`gossipRandomN(int n)`	Sends full gossip to `n` other random members.
`void`	`gossipSpeedupTick()`
`GossipStats`	`gossipStats()`
`void`	`gossipStats_$eq(GossipStats x$1)`
`void`	`gossipStatusTo(UniqueAddress node)`
`void`	`gossipStatusTo(UniqueAddress node, ActorRef destination)`
`GossipTargetSelector`	`gossipTargetSelector()`
`Cancellable`	`gossipTask()`
`void`	`gossipTick()`
`void`	`gossipTo(UniqueAddress node)`	Gossips latest gossip to a node.
`void`	`gossipTo(UniqueAddress node, ActorRef destination)`
`ClusterCoreDaemon.Ignored$`	`Ignored()`	Accessor for nested Scala object
`scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit>`	`initialized()`
`void`	`initJoin(com.typesafe.config.Config joiningNodeConfig)`
`boolean`	`isCurrentlyLeader()`
`void`	`isCurrentlyLeader_$eq(boolean x$1)`
`boolean`	`isGossipSpeedupNeeded()`
`boolean`	`isMinNrOfMembersFulfilled()`
`boolean`	`isSingletonCluster()`
`void`	`join(Address address)`	Try to join this cluster node with the node specified by `address`.
`void`	`joining(UniqueAddress joiningNode, scala.collection.immutable.Set<java.lang.String> roles)`	State transition to JOINING - new node joining.
`void`	`joinSeedNodes(scala.collection.immutable.IndexedSeq<Address> newSeedNodes)`
`scala.Option<scala.concurrent.duration.Deadline>`	`joinSeedNodesDeadline()`
`void`	`joinSeedNodesDeadline_$eq(scala.Option<scala.concurrent.duration.Deadline> x$1)`
`Gossip`	`latestGossip()`
`int`	`leaderActionCounter()`
`void`	`leaderActionCounter_$eq(int x$1)`
`void`	`leaderActions()`	Runs periodic leader actions, such as member status transitions, assigning partitions etc.
`void`	`leaderActionsOnConvergence()`	Leader actions are as follows: 1.
`Cancellable`	`leaderActionsTask()`
`void`	`leaving(Address address)`	State transition to LEAVING.
`static int`	`MaxGossipsBeforeShuttingDownMyself()`
`static int`	`MaxTicksBeforeShuttingDownMyself()`
`MembershipState`	`membershipState()`
`void`	`membershipState_$eq(MembershipState x$1)`
`ClusterCoreDaemon.Merge$`	`Merge()`	Accessor for nested Scala object
`void`	`moveJoiningToWeaklyUp()`
`ClusterCoreDaemon.Newer$`	`Newer()`	Accessor for nested Scala object
`static int`	`NumberOfGossipsBeforeShutdownWhenLeaderExits()`
`ClusterCoreDaemon.Older$`	`Older()`	Accessor for nested Scala object
`void`	`postStop()`	User overridable callback.
`void`	`preStart()`	User overridable callback.
`void`	`publishInternalStats()`
`void`	`publishMembershipState()`
`scala.Option<Cancellable>`	`publishStatsTask()`
`void`	`quarantined(UniqueAddress node)`
`void`	`reapUnreachableMembers()`	Reaps the unreachable members according to the failure detector's verdict.
`scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit>`	`receive()`	Scala API: This defines the initial actor behavior, it must return a partial function with the actor logic.
`scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit>`	`receiveExitingCompleted()`
`void`	`receiveExitingConfirmed(UniqueAddress node)`
`ClusterCoreDaemon.ReceiveGossipType`	`receiveGossip(GossipEnvelope envelope)`
`void`	`receiveGossipStatus(GossipStatus status)`
`ClusterCoreDaemon.Same$`	`Same()`	Accessor for nested Scala object
`scala.Option<ActorRef>`	`seedNodeProcess()`
`void`	`seedNodeProcess_$eq(scala.Option<ActorRef> x$1)`
`int`	`seedNodeProcessCounter()`
`void`	`seedNodeProcessCounter_$eq(int x$1)`
`scala.collection.immutable.IndexedSeq<Address>`	`seedNodes()`
`void`	`seedNodes_$eq(scala.collection.immutable.IndexedSeq<Address> x$1)`
`ActorRef`	`self()`	The 'self' field holds the ActorRef for this actor.
`java.lang.String`	`selfDc()`
`int`	`selfDownCounter()`
`void`	`selfDownCounter_$eq(int x$1)`
`scala.concurrent.Promise<Done>`	`selfExiting()`
`protected UniqueAddress`	`selfUniqueAddress()`
`void`	`sendGossipTo(Address address)`
`void`	`shutdown()`	This method is called when a member sees itself as Exiting or Down.
`void`	`shutdownSelfWhenDown()`
`boolean`	`statsEnabled()`
`void`	`stopSeedNodeProcess()`
`scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit>`	`tryingToJoin(Address joinWith, scala.Option<scala.concurrent.duration.Deadline> deadline)`
`void`	`unhandled(java.lang.Object message)`	User overridable callback.
`scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit>`	`uninitialized()`
`void`	`updateLatestGossip(Gossip gossip)`
`java.lang.String`	`vclockNode()`
`void`	`welcome(Address joinWith, UniqueAddress from, Gossip gossip)`	Accept reply from Join request.

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

Methods inherited from interface akka.actor.Actor
aroundPostRestart, aroundPostStop, aroundPreRestart, aroundPreStart, aroundReceive, postRestart, preRestart, sender, supervisorStrategy

- Constructor Detail
  - ClusterCoreDaemon
```
public ClusterCoreDaemon(ActorRef publisher,
                         JoinConfigCompatChecker joinConfigCompatChecker)
```
- Method Detail
  - NumberOfGossipsBeforeShutdownWhenLeaderExits
```
public static int NumberOfGossipsBeforeShutdownWhenLeaderExits()
```
  - MaxGossipsBeforeShuttingDownMyself
```
public static int MaxGossipsBeforeShuttingDownMyself()
```
  - MaxTicksBeforeShuttingDownMyself
```
public static int MaxTicksBeforeShuttingDownMyself()
```
  - Ignored
```
public ClusterCoreDaemon.Ignored$ Ignored()
```
    Accessor for nested Scala object
    
    Returns:
    
    (undocumented)
  - Older
```
public ClusterCoreDaemon.Older$ Older()
```
    Accessor for nested Scala object
    
    Returns:
    
    (undocumented)
  - Newer
```
public ClusterCoreDaemon.Newer$ Newer()
```
    Accessor for nested Scala object
    
    Returns:
    
    (undocumented)
  - Same
```
public ClusterCoreDaemon.Same$ Same()
```
    Accessor for nested Scala object
    
    Returns:
    
    (undocumented)
  - Merge
```
public ClusterCoreDaemon.Merge$ Merge()
```
    Accessor for nested Scala object
    
    Returns:
    
    (undocumented)
  - context
```
public ActorContext context()
```
    Description copied from interface: Actor
    
    Scala API: Stores the context for this actor, including self, and sender. It is implicit to support operations such as forward.
    WARNING: Only valid within the Actor itself, so do not close over it and publish it to other threads!
    ActorContext is the Scala API. getContext returns a AbstractActor.ActorContext, which is the Java API of the actor context.
    
    Specified by:
    
    context in interface Actor
    
    Returns:
    
    (undocumented)
  - self
```
public final ActorRef self()
```
    Description copied from interface: Actor
    The 'self' field holds the ActorRef for this actor.
    Can be used to send messages to itself:
    self ! message
    Specified by:
    
    self in interface Actor
    
    Returns:
    
    (undocumented)
  - akka$actor$Actor$_setter_$context_$eq
```
protected void akka$actor$Actor$_setter_$context_$eq(ActorContext x$1)
```
    Specified by:
    
    akka$actor$Actor$_setter_$context_$eq in interface Actor
  - akka$actor$Actor$_setter_$self_$eq
```
protected final void akka$actor$Actor$_setter_$self_$eq(ActorRef x$1)
```
    Description copied from interface: Actor
    The 'self' field holds the ActorRef for this actor.
    Can be used to send messages to itself:
    self ! message
    Specified by:
    
    akka$actor$Actor$_setter_$self_$eq in interface Actor
    
    Parameters:
    
    x$1 - (undocumented)
  - cluster
```
public Cluster cluster()
```
  - selfDc
```
public java.lang.String selfDc()
```
  - selfUniqueAddress
```
protected UniqueAddress selfUniqueAddress()
```
  - vclockNode
```
public java.lang.String vclockNode()
```
  - gossipTargetSelector
```
public GossipTargetSelector gossipTargetSelector()
```
  - membershipState
```
public MembershipState membershipState()
```
  - membershipState_$eq
```
public void membershipState_$eq(MembershipState x$1)
```
  - isCurrentlyLeader
```
public boolean isCurrentlyLeader()
```
  - isCurrentlyLeader_$eq
```
public void isCurrentlyLeader_$eq(boolean x$1)
```
  - latestGossip
```
public Gossip latestGossip()
```
  - statsEnabled
```
public boolean statsEnabled()
```
  - gossipStats
```
public GossipStats gossipStats()
```
  - gossipStats_$eq
```
public void gossipStats_$eq(GossipStats x$1)
```
  - seedNodes
```
public scala.collection.immutable.IndexedSeq<Address> seedNodes()
```
  - seedNodes_$eq
```
public void seedNodes_$eq(scala.collection.immutable.IndexedSeq<Address> x$1)
```
  - seedNodeProcess
```
public scala.Option<ActorRef> seedNodeProcess()
```
  - seedNodeProcess_$eq
```
public void seedNodeProcess_$eq(scala.Option<ActorRef> x$1)
```
  - seedNodeProcessCounter
```
public int seedNodeProcessCounter()
```
  - seedNodeProcessCounter_$eq
```
public void seedNodeProcessCounter_$eq(int x$1)
```
  - joinSeedNodesDeadline
```
public scala.Option<scala.concurrent.duration.Deadline> joinSeedNodesDeadline()
```
  - joinSeedNodesDeadline_$eq
```
public void joinSeedNodesDeadline_$eq(scala.Option<scala.concurrent.duration.Deadline> x$1)
```
  - leaderActionCounter
```
public int leaderActionCounter()
```
  - leaderActionCounter_$eq
```
public void leaderActionCounter_$eq(int x$1)
```
  - selfDownCounter
```
public int selfDownCounter()
```
  - selfDownCounter_$eq
```
public void selfDownCounter_$eq(int x$1)
```
  - exitingTasksInProgress
```
public boolean exitingTasksInProgress()
```
  - exitingTasksInProgress_$eq
```
public void exitingTasksInProgress_$eq(boolean x$1)
```
  - selfExiting
```
public scala.concurrent.Promise<Done> selfExiting()
```
  - coordShutdown
```
public CoordinatedShutdown coordShutdown()
```
  - exitingConfirmed
```
public scala.collection.immutable.Set<UniqueAddress> exitingConfirmed()
```
  - exitingConfirmed_$eq
```
public void exitingConfirmed_$eq(scala.collection.immutable.Set<UniqueAddress> x$1)
```
  - gossipTask
```
public Cancellable gossipTask()
```
  - failureDetectorReaperTask
```
public Cancellable failureDetectorReaperTask()
```
  - leaderActionsTask
```
public Cancellable leaderActionsTask()
```
  - publishStatsTask
```
public scala.Option<Cancellable> publishStatsTask()
```
  - preStart
```
public void preStart()
```
    Description copied from interface: Actor
    
    User overridable callback.
    Is called when an Actor is started. Actors are automatically started asynchronously when created. Empty default implementation.
    
    Specified by:
    
    preStart in interface Actor
  - postStop
```
public void postStop()
```
    Description copied from interface: Actor
    
    User overridable callback.
    Is called asynchronously after 'actor.stop()' is invoked. Empty default implementation.
    
    Specified by:
    
    postStop in interface Actor
  - uninitialized
```
public scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit> uninitialized()
```
  - tryingToJoin
```
public scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit> tryingToJoin(Address joinWith,
                                                                                          scala.Option<scala.concurrent.duration.Deadline> deadline)
```
  - becomeUninitialized
```
public void becomeUninitialized()
```
  - becomeInitialized
```
public void becomeInitialized()
```
  - initialized
```
public scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit> initialized()
```
  - receiveExitingCompleted
```
public scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit> receiveExitingCompleted()
```
  - receive
```
public scala.PartialFunction<java.lang.Object,scala.runtime.BoxedUnit> receive()
```
    Description copied from interface: Actor
    
    Scala API: This defines the initial actor behavior, it must return a partial function with the actor logic.
    
    Specified by:
    
    receive in interface Actor
    
    Returns:
    
    (undocumented)
  - unhandled
```
public void unhandled(java.lang.Object message)
```
    Description copied from interface: Actor
    
    User overridable callback.
    Is called when a message isn't handled by the current behavior of the actor by default it fails with either a DeathPactException (in case of an unhandled Terminated message) or publishes an UnhandledMessage to the actor's system's EventStream
    
    Specified by:
    
    unhandled in interface Actor
    
    Parameters:
    
    message - (undocumented)
  - initJoin
```
public void initJoin(com.typesafe.config.Config joiningNodeConfig)
```
  - joinSeedNodes
```
public void joinSeedNodes(scala.collection.immutable.IndexedSeq<Address> newSeedNodes)
```
  - join
```
public void join(Address address)
```
    Try to join this cluster node with the node specified by address. It's only allowed to join from an empty state, i.e. when not already a member. A Join(selfUniqueAddress) command is sent to the node to join, which will reply with a Welcome message.
    
    Parameters:
    
    address - (undocumented)
  - stopSeedNodeProcess
```
public void stopSeedNodeProcess()
```
  - joining
```
public void joining(UniqueAddress joiningNode,
                    scala.collection.immutable.Set<java.lang.String> roles)
```
    State transition to JOINING - new node joining. Received Join message and replies with Welcome message, containing current gossip state, including the new joining member.
    
    Parameters:
    
    joiningNode - (undocumented)
    
    roles - (undocumented)
  - welcome
```
public void welcome(Address joinWith,
                    UniqueAddress from,
                    Gossip gossip)
```
    Accept reply from Join request.
    
    Parameters:
    
    joinWith - (undocumented)
    
    from - (undocumented)
    
    gossip - (undocumented)
  - leaving
```
public void leaving(Address address)
```
    State transition to LEAVING. The node will eventually be removed by the leader, after hand-off in EXITING, and only after removal a new node with same address can join the cluster through the normal joining procedure.
    
    Parameters:
    
    address - (undocumented)
  - exitingCompleted
```
public void exitingCompleted()
```
  - receiveExitingConfirmed
```
public void receiveExitingConfirmed(UniqueAddress node)
```
  - cleanupExitingConfirmed
```
public void cleanupExitingConfirmed()
```
  - shutdown
```
public void shutdown()
```
    This method is called when a member sees itself as Exiting or Down.
  - downing
```
public void downing(Address address)
```
    State transition to DOWN. Its status is set to DOWN. The node is also removed from the seen table.
    The node will eventually be removed by the leader, and only after removal a new node with same address can join the cluster through the normal joining procedure.
    
    Parameters:
    
    address - (undocumented)
  - quarantined
```
public void quarantined(UniqueAddress node)
```
  - receiveGossipStatus
```
public void receiveGossipStatus(GossipStatus status)
```
  - receiveGossip
```
public ClusterCoreDaemon.ReceiveGossipType receiveGossip(GossipEnvelope envelope)
```
  - gossipTick
```
public void gossipTick()
```
  - gossipSpeedupTick
```
public void gossipSpeedupTick()
```
  - isGossipSpeedupNeeded
```
public boolean isGossipSpeedupNeeded()
```
  - gossipRandomN
```
public void gossipRandomN(int n)
```
    Sends full gossip to n other random members.
    
    Parameters:
    
    n - (undocumented)
  - gossip
```
public void gossip()
```
    Initiates a new round of gossip.
  - leaderActions
```
public void leaderActions()
```
    Runs periodic leader actions, such as member status transitions, assigning partitions etc.
  - shutdownSelfWhenDown
```
public void shutdownSelfWhenDown()
```
  - isMinNrOfMembersFulfilled
```
public boolean isMinNrOfMembersFulfilled()
```
  - leaderActionsOnConvergence
```
public void leaderActionsOnConvergence()
```
    Leader actions are as follows: 1. Move JOINING => UP -- When a node joins the cluster 2. Move LEAVING => EXITING -- 3. Non-exiting remain -- 4. Move unreachable EXITING => REMOVED -- When all nodes have seen the EXITING node as unreachable (convergence) - remove the node from the node ring and seen table 5. Move unreachable DOWN/EXITING => REMOVED -- When all nodes have seen that the node is DOWN/EXITING (convergence) - remove the node from the node ring and seen table 7. Updating the vclock version for the changes 8. Updating the seen table 9. Update the state with the new gossip
  - moveJoiningToWeaklyUp
```
public void moveJoiningToWeaklyUp()
```
  - reapUnreachableMembers
```
public void reapUnreachableMembers()
```
    Reaps the unreachable members according to the failure detector's verdict.
  - isSingletonCluster
```
public boolean isSingletonCluster()
```
  - sendGossipTo
```
public void sendGossipTo(Address address)
```
  - gossipTo
```
public void gossipTo(UniqueAddress node)
```
    Gossips latest gossip to a node.
    
    Parameters:
    
    node - (undocumented)
  - gossipTo
```
public void gossipTo(UniqueAddress node,
                     ActorRef destination)
```
  - gossipStatusTo
```
public void gossipStatusTo(UniqueAddress node,
                           ActorRef destination)
```
  - gossipStatusTo
```
public void gossipStatusTo(UniqueAddress node)
```
  - updateLatestGossip
```
public void updateLatestGossip(Gossip gossip)
```
  - assertLatestGossip
```
public void assertLatestGossip()
```
  - publishMembershipState
```
public void publishMembershipState()
```
  - publishInternalStats
```
public void publishInternalStats()
```

Class ClusterCoreDaemon

Nested Class Summary

Nested classes/interfaces inherited from interface akka.actor.Actor

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface akka.actor.Actor

Constructor Detail

ClusterCoreDaemon

Method Detail

NumberOfGossipsBeforeShutdownWhenLeaderExits

MaxGossipsBeforeShuttingDownMyself

MaxTicksBeforeShuttingDownMyself

Ignored

Older

Newer

Same

Merge

context

self

akka$actor$Actor$_setter_$context_$eq

akka$actor$Actor$_setter_$self_$eq

cluster

selfDc

selfUniqueAddress

vclockNode

gossipTargetSelector

membershipState

membershipState_$eq

isCurrentlyLeader

isCurrentlyLeader_$eq

latestGossip

statsEnabled

gossipStats

gossipStats_$eq

seedNodes

seedNodes_$eq

seedNodeProcess

seedNodeProcess_$eq

seedNodeProcessCounter

seedNodeProcessCounter_$eq

joinSeedNodesDeadline

joinSeedNodesDeadline_$eq

leaderActionCounter

leaderActionCounter_$eq

selfDownCounter

selfDownCounter_$eq

exitingTasksInProgress

exitingTasksInProgress_$eq

selfExiting

coordShutdown

exitingConfirmed

exitingConfirmed_$eq

gossipTask

failureDetectorReaperTask

leaderActionsTask

publishStatsTask

preStart

postStop

uninitialized

tryingToJoin

becomeUninitialized

becomeInitialized

initialized

receiveExitingCompleted

receive

unhandled

initJoin

joinSeedNodes

join

stopSeedNodeProcess

joining

welcome

leaving

exitingCompleted

receiveExitingConfirmed

cleanupExitingConfirmed

shutdown

downing

quarantined