MQTT Message Headers
You can configure either a source or target Micro-Integration for MQTT.
For more information about Micro-Integrations, see Understanding Micro-Integrations.
This section contains details about:
Headers for MQTT Source Micro-Integrations
This section lists the headers you can map for MQTT source Micro-Integrations.
MQTT Source Headers
| Name | Type | Description |
|---|---|---|
mqtt_id
|
Integer
|
ID of the message. |
mqtt_duplicate
|
Boolean
|
Whether the message is a duplicate. |
mqtt_version
|
String
|
The MQTT version of the message. |
mqtt_receivedTopic
|
String
|
The topic from which the message was received. |
mqtt_receivedQos
|
Integer
|
The quality of service. |
Solace Target Headers
| Name | Type | Description |
|---|---|---|
Smart Topic
|
String
|
A dynamic destination for the message. |
solace_applicationMessageId
|
String
|
The message ID (a string for an application-specific message identifier). |
solace_applicationMessageType
|
String
|
The application message type. |
solace_correlationId
|
String
|
The correlation ID of the message. |
solace_dmqEligible
|
Boolean
|
Indicates whether the message is eligible to be moved to a dead message queue (DMQ). |
solace_expiration
|
Long
|
The UTC time (in milliseconds, from midnight, January 1, 1970 UTC) when the message is supposed to expire. |
solace_httpContentEncoding
|
String
|
The HTTP content encoding header value from interaction with an HTTP client. |
solace_isReply
|
Boolean
|
Indicates whether the message is a reply to another message. |
solace_priority
|
Integer
|
The message priority value in the range of 0-255, or -1 if it is not set. |
solace_senderId
|
String
|
The sender ID for the message. |
solace_senderTimestamp
|
Long
|
The send timestamp (in milliseconds, from midnight, January 1, 1970 UTC). |
solace_sequenceNumber
|
Long
|
The sequence number. |
solace_timeToLive
|
Long
|
The number of milliseconds before the message is discarded or moved to a dead message queue (DMQ). |
Headers for MQTT Target Micro-Integrations
This section lists the headers you can map for MQTT target Micro-Integrations.
Solace Source Headers
| Name | Type | Description |
|---|---|---|
solace_applicationMessageId
|
String
|
The message ID (a string for an application-specific message identifier). |
solace_applicationMessageType
|
String
|
The application message type. |
solace_correlationId
|
String
|
The correlation ID of the message. |
solace_deliveryCount
|
Integer
|
The number of times the message has been delivered to clients. |
solace_discardIndication
|
Boolean
|
Indicates whether one or more messages have been discarded prior to the current message. |
solace_dmqEligible
|
Boolean
|
Indicates whether the message is eligible to be moved to a dead message queue (DMQ). |
solace_expiration
|
Long
|
The UTC time (in milliseconds, from midnight, January 1, 1970 UTC) when the message is set to expire. |
solace_httpContentEncoding
|
String
|
The HTTP content encoding header value from interaction with an HTTP client. |
solace_isReply
|
Boolean
|
Indicates whether the message is a reply to another message. |
solace_priority
|
Integer
|
The message priority value in the range of 0-255, or -1 if it is not set. |
solace_receiveTimestamp
|
Long
|
The receive timestamp (in milliseconds, from midnight, January 1, 1970 UTC). |
solace_redelivered
|
Boolean
|
Indicates whether the event broker has delivered the message to the API before. |
solace_senderId
|
String
|
The sender ID for the message. |
solace_senderTimestamp
|
Long
|
The send timestamp (in milliseconds, from midnight, January 1, 1970 UTC). |
solace_sequenceNumber
|
Long
|
The sequence number. |
solace_timeToLive
|
Long
|
The number of milliseconds before the message is discarded or moved to a dead message queue (DMQ). |
MQTT Target Headers
| Name | Type | Description |
|---|---|---|
Smart Topic
|
String
|
A dynamic destination for the message. |
mqtt_qos
|
Integer
|
A QoS for the message. |
mqtt_retained
|
Boolean
|
A retained flag for the message. |