org.apache.activemq.broker
Interfaces 
Broker
BrokerFactory.BrokerFactoryHandler
BrokerPlugin
BrokerServiceAware
Connection
Connector
Classes 
BrokerBroadcaster
BrokerFactory
BrokerFilter
BrokerPluginSupport
BrokerRegistry
BrokerService
CompositeDestinationBroker
ConnectionContext
DefaultBrokerFactory
EmptyBroker
ErrorBroker
InsertableMutableBrokerFilter
MutableBrokerFilter
SslBrokerService
TransactionBroker
TransportConnection
TransportConnector
TransportStatusDetector
UserIDBroker
Exceptions 
BrokerStoppedException