| Package | Description | 
|---|---|
| com.hazelcast.client.spi.impl | Provides util classes for the Hazelcast client SPI. | 
| com.hazelcast.client.spi.impl.listener | |
| com.hazelcast.internal.metrics | Contains the Hazelcast Metrics. | 
| com.hazelcast.nio.tcp | Contains functionality for the TCP/IP Networking for cluster members This whole package is internal and no compatibility will be provided. | 
| com.hazelcast.spi.impl.eventservice.impl | Contains the code for the  InternalEventServiceimplementation. | 
| com.hazelcast.spi.impl.operationexecutor.impl | Contains the  OperationExecutorImplcode. | 
| com.hazelcast.spi.impl.operationparker.impl | Contains the implementation code for the  OperationParker. | 
| com.hazelcast.spi.impl.operationservice.impl | Contains the code for the  InternalOperationServiceimplementation. | 
| com.hazelcast.spi.impl.proxyservice.impl | Contains the implementation of the  InternalProxyService. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ClientExecutionServiceImpl | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AbstractClientListenerService | 
| class  | NonSmartClientListenerService | 
| class  | SmartClientListenerService | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | DiscardableMetricsProviderA  MetricsProviderthat has the ability to discard to provided metrics. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | TcpIpAcceptorContains the logic for accepting TcpIpConnections. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | EventServiceImplService responsible for routing and dispatching local and remote events and keeping track of listener
 registrations. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | GenericOperationThreadAn  OperationThreadfor non partition specific operations. | 
| class  | OperationExecutorImplA  OperationExecutorthat schedules:
 
 partition specific operations to a specific partition-operation-thread (using a mod on the partition ID)
 non specific operations to generic-operation-threads
 
 TheOperationExecutorImpl.execute(Object, int, boolean)accepts an Object instead of a runnable to prevent needing to
 create wrapper runnables around tasks. | 
| class  | OperationThreadThe OperationThread is responsible for processing operations, packets containing operations and runnable's. | 
| class  | PartitionOperationThreadAn  OperationThreadthat executes Operations for a particular partition, e.g. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | OperationParkerImpl | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AsyncInboundResponseHandlerThe  AsyncInboundResponseHandleris a PacketHandler that asynchronously process operation-response packets. | 
| class  | InboundResponseHandlerResponsible for handling responses for invocations. | 
| class  | InvocationMonitorThe InvocationMonitor monitors all pending invocations and determines if there are any problems like timeouts. | 
| class  | InvocationRegistryResponsible for the registration of all pending invocations. | 
| class  | OperationServiceImplThis is the implementation of the  InternalOperationService. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ProxyServiceImpl | 
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