| Package | Description | 
|---|---|
| org.axonframework.axonserver.connector.command | |
| org.axonframework.axonserver.connector.query | |
| org.axonframework.commandhandling | Classes that implement the concept of command handling using explicit command objects. | 
| org.axonframework.commandhandling.distributed | |
| org.axonframework.deadline | |
| org.axonframework.deadline.dbscheduler | |
| org.axonframework.deadline.jobrunr | |
| org.axonframework.deadline.quartz | |
| org.axonframework.disruptor.commandhandling | |
| org.axonframework.eventhandling | Classes related to event handling and dispatching, such as  Event Listenersand theEvent Bus. | 
| org.axonframework.eventhandling.deadletter | |
| org.axonframework.eventhandling.pooled | |
| org.axonframework.queryhandling | |
| org.axonframework.test.deadline | |
| org.axonframework.test.utils | A collection of classes which may prove useful when testing Axon-based classes. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AxonServerCommandBusAxon  CommandBusimplementation that connects to Axon Server to submit and receive commands and command
 responses. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AxonServerQueryBusAxon  QueryBusimplementation that connects to Axon Server to submit and receive queries and query responses. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | CommandBusThe mechanism that dispatches Command objects to their appropriate CommandHandler. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AsynchronousCommandBusSpecialization of the SimpleCommandBus that processed Commands asynchronously from the calling thread. | 
| class  | SimpleCommandBusImplementation of the CommandBus that dispatches commands to the handlers subscribed to that specific command's name. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | CommandBusConnectorInterface describing the component that remotely connects multiple CommandBus instances. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DistributedCommandBusImplementation of a  CommandBusthat is aware of multiple instances of a CommandBus working together to spread
 load. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | DeadlineManagerContract for deadline managers. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AbstractDeadlineManagerAbstract implementation of the  DeadlineManagerto be implemented by concrete solutions for the
 DeadlineManager. | 
| class  | SimpleDeadlineManagerImplementation of  DeadlineManagerwhich uses Java'sScheduledExecutorServiceas scheduling and
 triggering mechanism. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DbSchedulerDeadlineManagerImplementation of  DeadlineManagerthat delegates scheduling and triggering to a db schedulerScheduler. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | JobRunrDeadlineManagerImplementation of  DeadlineManagerthat delegates scheduling and triggering to a JobrunrJobScheduler. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | QuartzDeadlineManagerImplementation of  DeadlineManagerthat delegates scheduling and triggering to a QuartzScheduler. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DisruptorCommandBusAsynchronous CommandBus implementation with very high performance characteristics. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | EventProcessorAn Event Processor processes event messages from an event queue or event bus. | 
| interface  | StreamingEventProcessorAn  EventProcessorwhich processes an event stream in segments. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AbstractEventProcessorAbstract implementation of an  EventProcessor. | 
| class  | SubscribingEventProcessorEvent processor implementation that  subscribesto theEventBusfor
 events. | 
| class  | TrackingEventProcessorEventProcessor implementation that tracks events from a  StreamableMessageSource. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DeadLetteringEventHandlerInvokerImplementation of an  EventHandlerInvokerutilizing aSequencedDeadLetterQueueto enqueueeventsfor which handling failed. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | PooledStreamingEventProcessorA  StreamingEventProcessorimplementation which pools its resources to enhance processing speed. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | QueryBusThe mechanism that dispatches Query objects to their appropriate QueryHandlers. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | SimpleQueryBusImplementation of the QueryBus that dispatches queries to the handlers within the JVM. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | StubDeadlineManagerStub implementation of  DeadlineManager. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | RecordingCommandBusCommandBus implementation that does not perform any actions on subscriptions or dispatched commands, but records
 them instead. | 
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