15.1.4.7. SampleInfo¶
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struct
eprosima::fastdds::dds
::
SampleInfo
¶ SampleInfo is the information that accompanies each sample that is ‘read’ or ‘taken.
’
Public Members
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SampleStateKind
sample_state
¶ indicates whether or not the corresponding data sample has already been read
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ViewStateKind
view_state
¶ indicates whether the DataReader has already seen samples for the most-current generation of the related instance.
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InstanceStateKind
instance_state
¶ indicates whether the instance is currently in existence or, if it has been disposed, the reason why it was disposed.
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int32_t
disposed_generation_count
¶ number of times the instance had become alive after it was disposed
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int32_t
no_writers_generation_count
¶ number of times the instance had become alive after it was disposed because no writers
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int32_t
sample_rank
¶ number of samples related to the same instance that follow in the collection
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int32_t
generation_rank
¶ the generation difference between the time the sample was received, and the time the most recent sample in the collection was received.
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int32_t
absoulte_generation_rank
¶ the generation difference between the time the sample was received, and the time the most recent sample was received. The most recent sample used for the calculation may or may not be in the returned collection
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fastrtps::rtps::Time_t
source_timestamp
¶ time provided by the DataWriter when the sample was written
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InstanceHandle_t
instance_handle
¶ identifies locally the corresponding instance
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InstanceHandle_t
publication_handle
¶ identifies locally the DataWriter that modified the instance
Is the same InstanceHandle_t that is returned by the operation get_matched_publications on the DataReader
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bool
valid_data
¶ whether the DataSample contains data or is only used to communicate of a change in the instance
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fastrtps::rtps::SampleIdentity
sample_identity
¶ Sample Identity (Extension for RPC)
Related Sample Identity (Extension for RPC)
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SampleStateKind