Release 10.1A: OpenEdge Development:
Messaging and ESB

Messages and message types

A Message is the package of information sent from a producer to a receiver through the Message Consumer. Table 2–6 describes the parts of a message.

Table 2–6: Message parts 

Part	Definition
Header field	A predefined set of names and data.
Property	Message property pairs set by the message producer.
Message body	Message content formatted according to the message type.

SonicMQ provides several standard JMS message types, plus the XMLMessage and MultipartMessage types. Table 2–7 lists the SonicMQ message types and content of each.

Table 2–7: Message types 

SonicMQ message type	Message body
HeaderMessage	No body. A header-only message that handles bodyless JMS messages.
TextMessage	A standard Java string.
MapMessage	A set of name/value pairs where values are Java primitives.
StreamMessage	A stream of Java primitives.
BytesMessage	A stream of uninterpreted bytes.
MultiPartMessage	Zero or more parts. Each part is either arbitrary (character or binary) data or a Sonic message.
XMLMessage	XML tagged text. A SonicMQ extension of the TextMessage.

For more information on messages, see the "Working with messages" section.