CoreDX DDS Java Reference Manual
List of all members
DurabilityServiceQosPolicy Class Reference

Detailed Description

The DurablityServiceQosPolicy supports the durablity of data. The DDS API identifies several degrees of data durability.

  1. VOLATILE: The data is volatile, and is not persisted beyond the initial publication.
  2. TRANSIENT_LOCAL: The data is persisted locally within the source DataWriter. If that DataWriter is destroyed, or the containing application exits, the data is no longer available.
  3. TRANSIENT: The data is persisted beyond the lifecycle of the originating DataWriter, and is available even after that DataWriter has been destroyed. However, data does not persist a reboot of the computer.
  4. PERSISTENT: The data is persisted to 'off-line' storage, and is available even after a system reboot.

If a durability of TRANSIENT or PERSISTENT is specified, then a service beyond the source DataWriter must be established to provide advanced data durability. This QoS policy helps to configure that durablity service.

CoreDX DDS currently supports VOLATILE and TRANSIENT_LOCAL.


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