DURABILITY
[QoS Policies]

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

Classes
struct	DDS_DurabilityQosPolicy
	This QoS policy specifies whether or not RTI Connext will store and deliver previously published data samples to new DDSDataReader 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 Connext will store and deliver previously published data samples to new DDSDataReader 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 Connext does not need to keep any samples of data instances on behalf of any DDSDataReader that is unknown by the DDSDataWriter at the time the instance is written. In other words, RTI Connext will only attempt to provide the data to existing subscribers.
DDS_TRANSIENT_LOCAL_DURABILITY_QOS	RTI Connext will attempt to keep some samples so that they can be delivered to any potential late-joining DDSDataReader. Which particular samples are kept depends on other QoS such as DDS_HistoryQosPolicy and DDS_ResourceLimitsQosPolicy. RTI Connext is only required to keep the data in memory of the DDSDataWriter that wrote the data. Data is not required to survive the DDSDataWriter. For this setting to be effective, you must also set the DDS_ReliabilityQosPolicy::kind to DDS_RELIABLE_RELIABILITY_QOS.
DDS_TRANSIENT_DURABILITY_QOS	RTI Connext will attempt to keep some samples so that they can be delivered to any potential late-joining DDSDataReader. Which particular samples are kept depends on other QoS such as DDS_HistoryQosPolicy and DDS_ResourceLimitsQosPolicy. RTI Connext is only required to keep the data in memory and not in permanent storage. Data is not tied to the lifecycle of the DDSDataWriter. Data will survive the DDSDataWriter.
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.