HISTORY

Specifies the behavior of RTI Connext in the case where the value of an instance changes (one or more times) before it can be successfully communicated to one or more existing subscribers. More...

Classes
struct	DDS::HistoryQosPolicy
	Specifies the behavior of RTI Connext in the case where the value of a sample changes (one or more times) before it can be successfully communicated to one or more existing subscribers. More...

Enumerations
enum	DDS::HistoryQosPolicyKind : UINT32 {   DDS::HistoryQosPolicyKind::KEEP_LAST_HISTORY_QOS,   DDS::HistoryQosPolicyKind::KEEP_ALL_HISTORY_QOS }
	Kinds of history. More...

Functions
static System::String ^	DDS::HistoryQosPolicy::get_history_qos_policy_name ()
	Stringified human-readable name for DDS::HistoryQosPolicy. More...

Detailed Description

Specifies the behavior of RTI Connext in the case where the value of an instance changes (one or more times) before it can be successfully communicated to one or more existing subscribers.

Enumeration Type Documentation

HistoryQosPolicyKind

enum DDS::HistoryQosPolicyKind : UINT32

strong

Kinds of history.

QoS:

DDS::HistoryQosPolicy

Enumerator
KEEP_LAST_HISTORY_QOS	[default] Keep the last depth samples. On the publishing side, RTI Connext will only attempt to keep the most recent depth samples of each instance of data (identified by its key) managed by the DDS::DataWriter. Invalid samples representing a disposal or unregistration of an instance count towards the depth and may replace other DDS samples currently in the DataWriter queue for the same instance. On the subscribing side, the DDS::DataReader will only attempt to keep the most recent depth samples received for each instance (identified by its key) until the application takes them via the DDS::DataReader 's take() operation. Invalid samples representing a disposal or unregistration of an instance do not count towards the history depth and will not replace other DDS samples currently in the DataReader queue for the same instance.
KEEP_ALL_HISTORY_QOS	Keep all the samples. On the publishing side, RTI Connext will attempt to keep all samples (representing each value written) of each instance of data (identified by its key) managed by the DDS::DataWriter until they can be delivered to all subscribers. On the subscribing side, RTI Connext will attempt to keep all samples of each instance of data (identified by its key) managed by the DDS::DataReader. These samples are kept until the application takes them from RTI Connext via the take() operation.

Function Documentation

get_history_qos_policy_name()

static System::String ^ DDS::HistoryQosPolicy::get_history_qos_policy_name ( )

inlinestatic

Stringified human-readable name for DDS::HistoryQosPolicy.