CoreDX DDS C++ Reference Manual
Public Member Functions | Public Attributes | List of all members
DDS::DurabilityServiceQosPolicy Struct Reference

Public Member Functions

 DurabilityServiceQosPolicy ()

Public Attributes

struct DDS::Duration_t service_cleanup_delay
 service cleanup delay
enum DDS::HistoryQosPolicyKind history_kind
 history kind
int history_depth
 history depth
int max_samples
 maximum samples limit for the service
int max_instances
 maximum instances limit for the service
int max_samples_per_instance
 maximum samples per instance limit for the service

Detailed Description

The DurabilityServiceQosPolicy 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.

Constructor & Destructor Documentation

DDS::DurabilityServiceQosPolicy::DurabilityServiceQosPolicy ( )

Constructor, Copy Constructor, Destructor, Assignment operator

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