51 lines
1.7 KiB
Rust
51 lines
1.7 KiB
Rust
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//! Write path: create, sign, apply, persist, and broadcast a CRDT op.
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//!
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//! [`apply_and_persist`] is the single entry point for all CRDT mutations.
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//! It invokes the caller's op-factory closure, signs the resulting op, applies
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//! it to the live document, sends it to the persistence channel, and broadcasts
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//! it to sync peers via [`super::SYNC_TX`].
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use bft_json_crdt::json_crdt::JsonValue;
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use bft_json_crdt::op::Op;
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use super::super::types::CrdtEvent;
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use super::{CrdtState, statics};
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/// Create a CRDT op via `op_fn`, sign it, apply it, and send it to the
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/// persistence channel. The closure receives `&mut CrdtState` so it can
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/// mutably access the CRDT document, while `sign` only needs `&keypair`.
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pub(in crate::crdt_state) fn apply_and_persist<F>(state: &mut CrdtState, op_fn: F)
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where
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F: FnOnce(&mut CrdtState) -> Op<JsonValue>,
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{
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let raw_op = op_fn(state);
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let signed = raw_op.sign(&state.keypair);
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state.crdt.apply(signed.clone());
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if state.persist_tx.send(signed.clone()).is_err() {
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let op_type = if signed.inner.is_deleted {
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"Delete"
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} else {
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"Insert"
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};
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let seq = signed.inner.seq;
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crate::slog_warn!(
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"[crdt_persist] persist channel send failed: op_type={op_type} seq={seq}"
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);
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}
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// Track in ALL_OPS + VECTOR_CLOCK, then broadcast to sync peers.
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if let Ok(json) = serde_json::to_string(&signed) {
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statics::track_op(&signed, json);
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}
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if let Some(tx) = statics::SYNC_TX.get() {
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let _ = tx.send(signed);
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}
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}
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/// Broadcast a CRDT event to all subscribers.
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pub(in crate::crdt_state) fn emit_event(event: CrdtEvent) {
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if let Some(tx) = statics::CRDT_EVENT_TX.get() {
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let _ = tx.send(event);
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}
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}
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