MigratoryDataQoSΒΆ

namespace migratorydata

Enums

enum QoS

The quality of service (QoS) levels for MigratoryData messaging.

Values:

enumerator STANDARD = 0

The QoS.STANDARD should be used for noncritical messages which will not be included in the cache of the MigratoryData cluster.

In this way, after a connection recovery, a client will not receive as part of the recovery process the messages with QoS.STANDARD.

Note: This QoS level corresponds to the at-most-once delivery semantics.

enumerator GUARANTEED

The QoS.GUARANTEED should be used for critical messages which will be included in the cache of the MigratoryData cluster.

In this way, after a connection recovery, a client will receive as part of the recovery process the messages with QoS.GUARANTEED.

Note: This QoS level corresponds to the at-least-once delivery semantics. Also, it might correspond to the exactly-once delivery semantics provided that subscribers are responsible for filtering out duplicate receptions, if it at all matters for the application. Typically, a small buffer containing the identifiers of recently-received messages is sufficient for this task.