| Package | Description | 
|---|---|
| com.hazelcast.cluster.impl | |
| com.hazelcast.instance | This package contains Hazelcast Instance functionality. | 
| com.hazelcast.internal.cluster.impl | This package contains the implementation of the cluster functionality. | 
| com.hazelcast.internal.cluster.impl.operations | This package contains operations for the com.hazelcast.cluster.impl package. | 
| Class and Description | 
|---|
| AbstractJoiner | 
| Class and Description | 
|---|
| ClusterServiceImpl | 
| ConfigCheck Contains enough information about Hazelcast Config to do a validation check so that clusters with different configurations
 don't join. | 
| JoinMessage | 
| JoinRequest | 
| MulticastService | 
| SplitBrainJoinMessage A  JoinMessageissued by the master node of a subcluster to the master of another subcluster
 while searching for other clusters for split brain recovery. | 
| Class and Description | 
|---|
| AbstractJoiner | 
| ClusterClockImpl | 
| ClusterHeartbeatManager ClusterHeartbeatManager manages the heartbeat sending and receiving
 process of a node. | 
| ClusterJoinManager ClusterJoinManager manages member join process. | 
| ClusterServiceImpl | 
| ClusterStateChange Wrapper object indicating a change in the cluster state - it may be cluster state change or cluster version change. | 
| ClusterStateManager ClusterStateManager stores cluster state and manages cluster state transactions. | 
| ConfigCheck Contains enough information about Hazelcast Config to do a validation check so that clusters with different configurations
 don't join. | 
| JoinMessage | 
| JoinRequest | 
| MembershipManager MembershipManager maintains member list and version, manages member update, suspicion and removal mechanisms. | 
| MembersView MembersView is a container object to carry member list and version together. | 
| MembersViewMetadata | 
| MulticastListener | 
| MulticastService | 
| SplitBrainJoinMessage A  JoinMessageissued by the master node of a subcluster to the master of another subcluster
 while searching for other clusters for split brain recovery. | 
| SplitBrainJoinMessage.SplitBrainMergeCheckResult | 
| Class and Description | 
|---|
| ClusterStateChange Wrapper object indicating a change in the cluster state - it may be cluster state change or cluster version change. | 
| JoinMessage | 
| JoinRequest | 
| MembersView MembersView is a container object to carry member list and version together. | 
| MembersViewMetadata | 
| SplitBrainJoinMessage A  JoinMessageissued by the master node of a subcluster to the master of another subcluster
 while searching for other clusters for split brain recovery. | 
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