DURABILITY
[QoS Policies]

This QoS policy specifies whether or not RTI Data Distribution Service will store and deliver previously published data samples to new DDS_DataReader entities that join the network later. More...

Data Structures
struct	DDS_DurabilityQosPolicy
	This QoS policy specifies whether or not RTI Data Distribution Service will store and deliver previously published data samples to new DDS_DataReader entities that join the network later. More...
Enumerations
enum	DDS_DurabilityQosPolicyKind {   DDS_VOLATILE_DURABILITY_QOS,   DDS_TRANSIENT_LOCAL_DURABILITY_QOS,   DDS_TRANSIENT_DURABILITY_QOS,   DDS_PERSISTENT_DURABILITY_QOS }
	Kinds of durability. More...
Variables
const char *const	DDS_DURABILITY_QOS_POLICY_NAME
	Stringified human-readable name for DDS_DurabilityQosPolicy.

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Detailed Description

This QoS policy specifies whether or not RTI Data Distribution Service will store and deliver previously published data samples to new DDS_DataReader entities that join the network later.

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Enumeration Type Documentation

enum DDS_DurabilityQosPolicyKind

Kinds of durability.

QoS:

DDS_DurabilityQosPolicy

Enumerator:

DDS_VOLATILE_DURABILITY_QOS	[default] RTI Data Distribution Service does not need to keep any samples of data instances on behalf of any DDS_DataReader that is unknown by the DDS_DataWriter at the time the instance is written. In other words, RTI Data Distribution Service will only attempt to provide the data to existing subscribers.
DDS_TRANSIENT_LOCAL_DURABILITY_QOS	RTI Data Distribution Service will attempt to keep some samples so that they can be delivered to any potential late-joining DDS_DataReader. Which particular samples are kept depends on other QoS such as DDS_HistoryQosPolicy and DDS_ResourceLimitsQosPolicy. RTI Data Distribution Service is only required to keep the data in memory of the DDS_DataWriter that wrote the data. Data is not required to survive the DDS_DataWriter. For this setting to be effective, you must also set the DDS_ReliabilityQosPolicy::kind to DDS_RELIABLE_RELIABILITY_QOS.
DDS_TRANSIENT_DURABILITY_QOS	RTI Data Distribution Service will attempt to keep some samples so that they can be delivered to any potential late-joining DDS_DataReader. Which particular samples are kept depends on other QoS such as DDS_HistoryQosPolicy and DDS_ResourceLimitsQosPolicy. RTI Data Distribution Service is only required to keep the data in memory and not in permanent storage. Data is not tied to the lifecycle of the DDS_DataWriter. Data will survive the DDS_DataWriter.
DDS_PERSISTENT_DURABILITY_QOS	Data is kept on permanent storage, so that they can outlive a system session.

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Variable Documentation

const char* const DDS_DURABILITY_QOS_POLICY_NAME

Stringified human-readable name for DDS_DurabilityQosPolicy.