| Package | Description | 
|---|---|
| com.hazelcast.instance | This package contains Hazelcast Instance functionality. | 
| com.hazelcast.internal.partition | Contains the internals for partition assignment/management, migration, replication etc. | 
| com.hazelcast.internal.partition.impl | Contains the actual implementation of the  InternalPartitionService. | 
| Class and Description | 
|---|
| InternalPartitionServiceImpl The  InternalPartitionServiceimplementation. | 
| Class and Description | 
|---|
| InternalPartitionServiceImpl The  InternalPartitionServiceimplementation. | 
| PartitionReplicaChangeEvent | 
| Class and Description | 
|---|
| InternalMigrationListener Internal synchronous/blocking listener to intercept migration cycle
 on master member and migration participants. | 
| InternalMigrationListener.MigrationParticipant | 
| InternalPartitionImpl | 
| InternalPartitionServiceImpl The  InternalPartitionServiceimplementation. | 
| MigrationManager Maintains migration system state and manages migration operations performed within the cluster. | 
| PartitionEventManager Maintains registration of partition-system related listeners and dispatches corresponding events. | 
| PartitionReplicaChangeEvent | 
| PartitionReplicaManager Maintains the version values for the partition replicas and manages the replica-related operations for partitions | 
| PartitionReplicaStateChecker Verifies up-to-dateness of each of partition replicas owned by this member. | 
| PartitionServiceState Represents partition service state of current member. | 
| PartitionStateManager Maintains the partition table state. | 
| ReplicaFragmentSyncInfo The information for a replica synchronization - which partition and replica index needs synchronization and what is
 the target (the owner of the partition). | 
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