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use crate::messages::fragment_number::FragmentNumber;
use crate::structure::guid::EntityId;
use crate::structure::sequence_number::SequenceNumber;
use speedy::{Readable, Writable};
/// When fragmenting data and until all fragments are available, the
/// HeartbeatFrag Submessage is sent from an RTPS Writer to an RTPS Reader to
/// communicate which fragments the Writer has available. This enables reliable
/// communication at the fragment level.
///
/// Once all fragments are available, a regular Heartbeat message is used.
#[derive(Debug, PartialEq, Readable, Writable, Clone)]
pub struct HeartbeatFrag {
/// Identifies the Reader Entity that is being informed of the availability
/// of fragments. Can be set to ENTITYID_UNKNOWN to indicate all readers for
/// the writer that sent the message.
pub reader_id: EntityId,
/// Identifies the Writer Entity that sent the Submessage.
pub writer_id: EntityId,
/// Identifies the sequence number of the data change for which fragments
/// are available.
pub writer_sn: SequenceNumber,
/// All fragments up to and including this last (highest) fragment are
/// available on the Writer for the change identified by writerSN.
pub last_fragment_num: FragmentNumber,
/// A counter that is incremented each time a new HeartbeatFrag message is
/// sent. Provides the means for a Reader to detect duplicate HeartbeatFrag
/// messages that can result from the presence of redundant communication
/// paths.
pub count: i32,
}
#[cfg(test)]
mod tests {
use super::*;
serialization_test!( type = HeartbeatFrag,
{
heartbeat_frag,
HeartbeatFrag {
reader_id: EntityId::ENTITYID_SEDP_BUILTIN_PUBLICATIONS_READER,
writer_id: EntityId::ENTITYID_SEDP_BUILTIN_PUBLICATIONS_WRITER,
writer_sn: SequenceNumber::from(42),
last_fragment_num: FragmentNumber::from(99),
count: 6,
},
le = [0x00, 0x00, 0x03, 0xC7,
0x00, 0x00, 0x03, 0xC2,
0x00, 0x00, 0x00, 0x00,
0x2A, 0x00, 0x00, 0x00,
0x63, 0x00, 0x00, 0x00,
0x06, 0x00, 0x00, 0x00],
be = [0x00, 0x00, 0x03, 0xC7,
0x00, 0x00, 0x03, 0xC2,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x2A,
0x00, 0x00, 0x00, 0x63,
0x00, 0x00, 0x00, 0x06]
});
}