DDS::SampleStateKind Struct Reference
[Sample States]

Indicates whether or not a sample has ever been read. More...

#include <managed_subscription.h>

List of all members.

Properties
static SampleStateKind	READ_SAMPLE_STATE [get]
	Sample has been read.
static SampleStateKind	NOT_READ_SAMPLE_STATE [get]
	Sample has not been read.
static SampleStateKind	ANY_SAMPLE_STATE [get]
	Any sample state DDS::SampleStateKind::READ_SAMPLE_STATE | DDS::SampleStateKind::NOT_READ_SAMPLE_STATE.

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Detailed Description

Indicates whether or not a sample has ever been read.

For each sample received, the middleware internally maintains a sample_state relative to each DDS::DataReader. The sample state can be either:

• DDS::SampleStateKind::READ_SAMPLE_STATE indicates that the DDS::DataReader has already accessed that sample by means of a read or take operation.

• DDS::SampleStateKind::NOT_READ_SAMPLE_STATE indicates that the DDS::DataReader has not accessed that sample before.

The sample state will, in general, be different for each sample in the collection returned by read or take.

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Property Documentation

SampleStateKind DDS::SampleStateKind::READ_SAMPLE_STATE [static, get]

Sample has been read.

SampleStateKind DDS::SampleStateKind::NOT_READ_SAMPLE_STATE [static, get]

Sample has not been read.