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Refactor: move internal replication request/response data to separate…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| use std::fmt; | ||
|
|
||
| /// A replication request sent by RaftCore leader state to replication stream. | ||
| pub(crate) enum Replicate<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| /// Inform replication stream to forward the committed log id to followers/learners. | ||
| Committed(Option<LogId<C::NodeId>>), | ||
|
|
||
| /// Send an empty AppendEntries RPC as heartbeat. | ||
| Heartbeat, | ||
|
|
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| /// Send a chunk of data, e.g., logs or snapshot. | ||
| Data(Data<C>), | ||
| } | ||
|
|
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| impl<C> Replicate<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| pub(crate) fn logs(id: Option<u64>, log_id_range: LogIdRange<C::NodeId>) -> Self { | ||
| Self::Data(Data::new_logs(id, log_id_range)) | ||
| } | ||
|
|
||
| pub(crate) fn snapshot(id: Option<u64>, snapshot_rx: oneshot::Receiver<Option<Snapshot<C>>>) -> Self { | ||
| Self::Data(Data::new_snapshot(id, snapshot_rx)) | ||
| } | ||
| } | ||
|
|
||
| impl<C> MessageSummary<Replicate<C>> for Replicate<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| fn summary(&self) -> String { | ||
| match self { | ||
| Replicate::Committed(c) => { | ||
| format!("Replicate::Committed: {:?}", c) | ||
| } | ||
| Replicate::Heartbeat => "Replicate::Heartbeat".to_string(), | ||
| Replicate::Data(d) => { | ||
| format!("Replicate::Data({})", d.summary()) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| use tokio::sync::oneshot; | ||
|
|
||
| use crate::display_ext::DisplayOptionExt; | ||
| use crate::log_id_range::LogIdRange; | ||
| use crate::LogId; | ||
| use crate::MessageSummary; | ||
| use crate::RaftTypeConfig; | ||
| use crate::Snapshot; | ||
|
|
||
| /// Request to replicate a chunk of data, logs or snapshot. | ||
| /// | ||
| /// It defines what data to send to a follower/learner and an id to identify who is sending this | ||
| /// data. | ||
| /// Thd data is either a series of logs or a snapshot. | ||
| pub(crate) enum Data<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| Logs(DataWithId<LogIdRange<C::NodeId>>), | ||
| Snapshot(DataWithId<oneshot::Receiver<Option<Snapshot<C>>>>), | ||
| } | ||
|
|
||
| impl<C> fmt::Debug for Data<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| match self { | ||
| Self::Logs(l) => f | ||
| .debug_struct("Data::Logs") | ||
| .field("request_id", &l.request_id()) | ||
| .field("log_id_range", &l.data) | ||
| .finish(), | ||
| Self::Snapshot(s) => f.debug_struct("Data::Snapshot").field("request_id", &s.request_id()).finish(), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl<C: RaftTypeConfig> fmt::Display for Data<C> { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| match self { | ||
| Self::Logs(l) => { | ||
| write!( | ||
| f, | ||
| "Logs{{request_id: {}, log_id_range: {}}}", | ||
| l.request_id.display(), | ||
| l.data | ||
| ) | ||
| } | ||
| Self::Snapshot(s) => { | ||
| write!(f, "Snapshot{{request_id: {}}}", s.request_id.display()) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl<C> MessageSummary<Data<C>> for Data<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| fn summary(&self) -> String { | ||
| self.to_string() | ||
| } | ||
| } | ||
|
|
||
| impl<C> Data<C> | ||
| where C: RaftTypeConfig | ||
| { | ||
| pub(crate) fn new_logs(request_id: Option<u64>, log_id_range: LogIdRange<C::NodeId>) -> Self { | ||
| Self::Logs(DataWithId::new(request_id, log_id_range)) | ||
| } | ||
|
|
||
| pub(crate) fn new_snapshot(request_id: Option<u64>, snapshot_rx: oneshot::Receiver<Option<Snapshot<C>>>) -> Self { | ||
| Self::Snapshot(DataWithId::new(request_id, snapshot_rx)) | ||
| } | ||
|
|
||
| pub(crate) fn request_id(&self) -> Option<u64> { | ||
| match self { | ||
| Self::Logs(l) => l.request_id(), | ||
| Self::Snapshot(s) => s.request_id(), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub(crate) struct DataWithId<T> { | ||
| /// The id of this replication request. | ||
| /// | ||
| /// A replication request without an id does not need to send a reply to the caller. | ||
| request_id: Option<u64>, | ||
| data: T, | ||
| } | ||
|
|
||
| impl<T> DataWithId<T> { | ||
| pub(crate) fn new(request_id: Option<u64>, data: T) -> Self { | ||
| Self { request_id, data } | ||
| } | ||
|
|
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| pub(crate) fn request_id(&self) -> Option<u64> { | ||
| self.request_id | ||
| } | ||
|
|
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| pub(crate) fn data(&self) -> &T { | ||
| &self.data | ||
| } | ||
|
|
||
| pub(crate) fn into_data(self) -> T { | ||
| self.data | ||
| } | ||
| } |
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