Dynamo’s JMS providers use the following message format conventions, based on a subset of the JMS message options:
Messages are of type
javax.jms.ObjectMessage. The objects stored in theObjectMessageare serializable Java Beans whose properties contain the message’s data. These Java Beans are called message beans.The class names for the Message Beans all end with
Message—for example,atg.nucleus.dms.DASMessage.The
JMSTypeheader is used to identify the type of message being fired.JMSTypenames follow package name conventions—for example,atg.das.Startup. TheJMSTypename does not need to be an actual Java class name; it follows the package naming conventions to avoid collisions with other JMS applications.Each
JMSTypecorresponds to exactly one Message Bean class. For example, a message ofJMSTypeatg.das.Startupis always anObjectMessagecontaining a bean of typeatg.nucleus.dms.DASMessage. MultipleJMSTypescan correspond to the same Message Bean class. For example,JMSTypeatg.das.Shutdownalso corresponds toatg.nucleus.dms.DASMessage.Messages avoid the use of application-specific header values. All such values are instead represented as properties of the contained message bean.
