| JMS Message Headers | ||
| Header Field | Set By | Description |
| JMSDestination | send or publish method | Returns a Destination object (a Topic or a Queue, or their temporary version) describing where the message was directed. |
| JMSDeliveryMode | send or publish method | Can be DeliveryMode.NON_PERSISTENT orDeliveryMode.PERSISTENT; only persistent messages guarantee delivery in case of a crash of the brokers that transport it. |
| JMSExpiration | send or publish method | Returns a timestamp indicating the expiration time of the message; it can be 0 on a message without a defined expiration. |
| JMSPriority | send or publish method | Returns a 0-9 integer value (higher is better) defining the priority for delivery. It is only a best-effort value. |
| JMSMessageID | send or publish method | Contains a generated ID for identifying a message, unique at least for the current broker. All generated IDs start with the prefix 'ID:', but you can override it with the corresponding setter. |
| JMSTimestamp | send or publish method | Returns a long indicating the time of sending. |
| JMSCorrelationID | Client | Can link a message with another, usually one that has been sent previously (typically used for a request/response scenario). For example, a reply can carry the ID of the original request message. |
| JMSReplyTo | Client | Is a Destination object where replies should be sent, it can be null. |
| JMSType | Client | Defines a field for provider-specific or application-specific message types. |
| JMSRedelivered | JMS provider | Returns a boolean indicating if the message is being delivered again after a delivery which was not acknowledge. |
| JMS Message Properties | ||
| Application-related properties | A Java application can assign application-related properties, which are set before the message is delivered. | |
| Provider-related properties | Every JMS provider can define proprietary properties that can be set either by the client or automatically by the provider. Provider-related properties are prefixed with 'JMS_' followed by the vendor name and the specific property name; for example: JMS_I | |
| Standard properties | These standardized properties are set by the JMS provider (if supported) when a message is sent. Standard property names start with 'JMSX'; for example: JMSXUserid or JMSXDeliveryCount. |
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| JMS Message Body | ||
| Message Type | Body Contains | |
| TextMessage | A java.lang.String object (for example, the contents of an XML file). | |
| MapMessage | A set of name-value pairs, with names as String objects and values as primitive types in the Java programming language. The entries can be accessed sequentially by enumerator or randomly by name. The order of the entries is undefined. | |
| BytesMessage | A stream of uninterpreted bytes. This message type is for literally encoding a body to match an existing message format. | |
| StreamMessage | A stream of primitive values in the Java programming language, filled and read sequentially. | |
| ObjectMessage | A Serializable object in the Java programming language. | |
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