Classes | |
struct | DDS_DurabilityQosPolicy |
This QoS policy specifies whether or not RTI Data Distribution Service 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. |
Kinds of durability.
DDS_VOLATILE_DURABILITY_QOS |
[default] RTI Data Distribution Service 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 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 DDSDataReader.
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 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 Data Distribution Service 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 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 DDSDataWriter.
Data will survive the DDSDataWriter. |
DDS_PERSISTENT_DURABILITY_QOS | Data is kept on permanent storage, so that they can outlive a system session. |
const char* const DDS_DURABILITY_QOS_POLICY_NAME |
Stringified human-readable name for DDS_DurabilityQosPolicy.