HistoryQosPolicyKind Class Reference
[HISTORY]

Kinds of history. More...

Inheritance diagram for HistoryQosPolicyKind:

List of all members.

Static Public Attributes
static final HistoryQosPolicyKind	KEEP_LAST_HISTORY_QOS
	[default] Keep the last depth samples.
static final HistoryQosPolicyKind	KEEP_ALL_HISTORY_QOS
	Keep all the samples.

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Detailed Description

Kinds of history.

QoS:

com.rti.dds.infrastructure.HistoryQosPolicy

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Member Data Documentation

final HistoryQosPolicyKind KEEP_LAST_HISTORY_QOS [static]

[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 com.rti.dds.publication.DataWriter.

On the subscribing side, the com.rti.dds.subscription.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 com.rti.dds.subscription.DataReader 's take() operation.

final HistoryQosPolicyKind KEEP_ALL_HISTORY_QOS [static]

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 com.rti.dds.publication.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 com.rti.dds.subscription.DataReader. These samples are kept until the application takes them from RTI Connext via the take() operation.