| Package | Description | 
|---|---|
| com.hazelcast.nio.tcp | Contains functionality for the TCP/IP Networking between cluster members | 
| com.hazelcast.spi.impl.eventservice | Contains the code for the  InternalEventService. | 
| com.hazelcast.spi.impl.eventservice.impl | Contains the code for the  InternalEventServiceimplementation. | 
| com.hazelcast.spi.impl.operationservice | Contains the  InternalOperationServiceAPI. | 
| com.hazelcast.spi.impl.operationservice.impl | Contains the code for the  InternalOperationServiceimplementation. | 
| com.hazelcast.spi.impl.packetdispatcher.impl | Contains the implementation of the  PacketDispatcher. | 
| com.hazelcast.wan | This package contains the WAN replication API | 
| com.hazelcast.wan.impl | This package contains the opensource implementation of WAN replication | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | TcpIpConnectionManager | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | InternalEventServiceThe InternalEventService is an  EventServiceinterface that adds additional capabilities
 we don't want to expose to the end user. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | EventServiceImpl | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | InternalOperationServiceThis is the interface that needs to be implemented by actual InternalOperationService. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AsyncResponsePacketHandlerThe AsyncResponsePacketHandler is a PacketHandler that asynchronously process operation-response packets. | 
| class  | OperationServiceImplThis is the implementation of the  InternalOperationService. | 
| Constructor and Description | 
|---|
| AsyncResponsePacketHandler(HazelcastThreadGroup threadGroup,
                          ILogger logger,
                          PacketHandler responsePacketHandler) | 
| Constructor and Description | 
|---|
| PacketDispatcherImpl(ILogger logger,
                    PacketHandler operationPacketHandler,
                    PacketHandler eventPacketHandler,
                    PacketHandler wanReplicationPacketHandler,
                    PacketHandler connectionPacketHandler) | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | WanReplicationServiceThis is the WAN replications service API core interface. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | WanReplicationServiceImplOpen source implementation of the  WanReplicationService | 
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