4.2.2. Components of an ESB Message
An ESB message is made up of the following components:
- Header
- The header contains such information as the destination end-point reference, the sender end-point reference, and where the reply goes. This is all general message-level functional information.
- Context
- This is additional information that further explains the message; for example, transaction or security data, the identity of the ultimate receiver or HTTP-cookie information.
- Body
- The actual contents of the message.
- Fault
- Any error information associated with the message.
- Attachment
- Any attachments (additional files) associated with the message.
- Properties
- Any message-specific properties.(For example, the jbossesb.message.id property specifies a unique value for each message).
Here is a code representation:
<xs:complexType name="Envelope">
<xs:attribute ref="Header" use="required"/>
<xs:attribute ref="Context" use="required"/>
<xs:attribute ref="Body" use="required"/>
<xs:attribute ref="Attachment" use="optional"/>
<xs:attribute ref="Properties" use="optional"/>
<xs:attribute ref="Fault" use="optional"/>
</xs:complexType>
