Batch subscriber #148
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fulmicoton
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fulmicoton
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May 2, 2024
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Upon reset_node and apply_update, we want to be able to react to a batch of changes rather than individual changes. In quickwit for instance, we want to be able to react to the reception of a batch of deleted shard and group this reaction into a single metastore call.
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| let node_state = self.cluster_state.node_state_mut(chitchat_id); | ||
| ) -> anyhow::Result<()> { | ||
| // We validate the version is compatible with what is in key_values. | ||
| if !key_values.is_empty() { |
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this check is redundant (if key_values is empty, the for will not iterate)
| listener_idx: usize, | ||
| // Callbacks is a hashmap because as we delete listeners, we create "holes" in the | ||
| // callback_id -> callback mapping | ||
| callbacks: HashMap<usize, CallbackEntry>, |
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can you make this a HashMap<CallbackId, CallbackEntry> to make clear it goes hand in hand with listeners
| NodeState { | ||
| chitchat_id, | ||
| heartbeat: Heartbeat(0), | ||
| key_values: Default::default(), | ||
| max_version: 0u64, | ||
| listeners, | ||
| // listeners, |
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| // listeners, |
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| impl<'a> Deref for NodeStateMut<'a> { | ||
| type Target = NodeState; | ||
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| fn deref(&self) -> &NodeState { | ||
| self.node_state_mut | ||
| } | ||
| } | ||
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| impl<'a> DerefMut for NodeStateMut<'a> { | ||
| fn deref_mut(&mut self) -> &mut NodeState { | ||
| self.node_state_mut | ||
| } | ||
| } | ||
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I think deref makes sense, but deref_mut is bound to cause mutations which don't notify listeners
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| key.to_string(), | ||
| VersionedValue { | ||
| value: value.to_string(), |
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these to_string() look redundant
trinity-1686a
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May 16, 2024
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| // 0 stale values | ||
| { | ||
| cluster_state.node_state_mut(&node5); | ||
| } | ||
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| // 3 stale values |
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I don't understand where the stale value count come from. Before node5 and node6 had respectively 3 and 0 (instead of 0 and 3) stale values. I don't see an obvious reason this changed
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Upon reset_node and apply_update, we want to be
able to react to a batch of changes rather than individual changes.
In quickwit for instance, we want to be able to react to the reception of a batch of deleted shard and group this reaction into a single metastore call.