org.activemq.util
Interfaces 
Callback
Classes 
AsyncProxy
BeanUtils
BitArray
BitArrayBin
ClassLoading
DefaultComparator
ExceptionTemplate
ExecutorHelper
FactoryFinder
FastInputStream
FastOutputStream
IdGenerator
IndentPrinter
JMSExceptionHelper
JmsLogAppender
JmsLogAppenderSupport
JndiJmsLogAppender
LongSequenceGenerator
LRUCache
MapHelper
MessageListenerSupport
ReflectionSupport
SerializationHelper
SerializationHelper.ObjectInputStreamExt
SystemProperties
TransactionTemplate
URIHelper