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Header Fields

JMS messages contain a fixed number of header fields. Each JMS message uses these fields regardless of message type. Every JMS source and target definition includes a pre-defined set of header fields.

The following table describes the JMS message header fields:

Header Field	Description
JMSDestination	Destination to which the message is sent. JMS destinations can be a message queue or a recipient who listens for messages based on the message topic.
JMSDeliveryMode	Delivery mode of the message. The delivery mode can be persistent or non-persistent.
JMSMessageID	Unique identification value for the message.
JMSTimestamp	Time at which the message was handed off to the provider to be sent to the destination.
JMSCorrelationID	Links one message with another. For example, JMSCorrelationID can link a response message with the corresponding request message.
JMSReplyTo	Destination to which a reply message can be sent.
JMSRedelivered	Indicates that a message might have been delivered previously, but not acknowledged.
JMSType	Type of message based on a description of the message. For example, if a message contains a stock trade, the message type might be stock trade.
JMSExpiration	Amount of time in milliseconds the message remains valid. The messages remain in memory during this period.
JMSPriority	Priority of the message from 0-9. 0 is the lowest priority. 9 is the highest.

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Header Fields

Header Fields