在这种方式下，利用STOMP将消息发送到ActiveMQ，对应用程序的其它部分来说，是相当透明的。
In this manner, using STOMP to send messages to ActiveMQ is quite transparent to the rest of the application.
MessageHelper类的这一方法与WebServer是在同一个虚拟机中执行的——在本例中，就是执行Jetty实例和ActiveMQ的那个虚拟机。
For instance, we were using ActiveMQ when it did not have a strong dead letter processing capability.
The ActiveMQ RA supports both outbound connections (JMS calls out to the message broker), and inbound connections (ActiveMQ-originated calls call into MDBs).
