Extract TransportRequestDeduplication from ShardStateAction#37870
Extract TransportRequestDeduplication from ShardStateAction#37870original-brownbear merged 9 commits intoelastic:masterfrom original-brownbear:extract-transport-dedup
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* Extracted the logic for master request duplication so it can be reused by the snapshotting logic * Removed custom listener used by `ShardStateAction` to not leak these into future users of this class * Changed semantics slightly to get rid of redundant instantiations of the composite listener * Relates #37686
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:Distributed/Distributed
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Pinging @elastic/es-distributed |
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@dnhatn ping (just in case this got lost, no big rush :)) |
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@original-brownbear sorry for the delay. I will do it today. |
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Nice change. I left a some nits and a point to discuss.
| /** | ||
| * Register a listener for the given request with the deduplicator. | ||
| * If the request is not yet registered with the deduplicator it will return an {@link ActionListener} | ||
| * that must be completed by the called when the request completes. If the request is already known to |
| * @param listener Listener to invoke on request completion | ||
| * @return Listener that must be invoked by the caller or null when the request is already known | ||
| */ | ||
| public ActionListener<Void> register(T request, ActionListener<Void> listener) { |
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I am making a suggestion but feel free to reject it because for me this PR is very good already. How about adding a new argument Consumer<Listener> that executes the request if it was not executed before (surely we need to rename the method). With this change, I think we can safely use this method without reading the documentation.
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I think we miss a test which ensures that if we register a request multiple times (maybe concurrently), we return a non-null result only once. And we need also to verify that when the returned listener is completed, the cached size is reduced.
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How about adding a new argument Consumer that executes the request if it was not executed before (surely we need to rename the method). With this change, I think we can safely use this method without reading the documentation.
👍 I like it :) On it.
I think we miss a test which ensures that if we register a request multiple times (maybe concurrently), we return a non-null result only once. And we need also to verify that when the returned listener is completed, the cached size is reduced.
Sure, sounds reasonable => on it :)
server/src/main/java/org/elasticsearch/cluster/action/shard/ShardStateAction.java
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I think we miss a test which ensures that if we register a request multiple times (maybe concurrently), we return a non-null result only once. And we need also to verify that when the returned listener is completed, the cached size is reduced.
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@dnhatn thanks for the review! All points addressed I think :) Take a look and let me know what you think. |
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All green again :) |
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I left a nit on the javadocs. This is a nice refactoring. Thanks for an extra iteration @original-brownbear.
server/src/main/java/org/elasticsearch/transport/TransportRequestDeduplicator.java
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@dnhatn thanks for the review! |
* master: Remove types from watcher docs (elastic#38002) Add test coverage for Painless general casting of boolean and Boolean (elastic#37780) Fixed test bug, lastFollowTime is null if there are no follower indices. Add ECS schema for user-agent ingest processor (elastic#37727) (elastic#37984) Extract TransportRequestDeduplication from ShardStateAction (elastic#37870) Expose retention leases in shard stats (elastic#37991)
* elastic/master: ILM setPriority corrections for a 0 value (elastic#38001) Temporarily disable BWC for retention lease stats (elastic#38049) Skip Shrink when numberOfShards not changed (elastic#37953) Add dispatching to `HandledTransportAction` (elastic#38050) Update httpclient for JDK 11 TLS engine (elastic#37994) Reduce flaxiness of ccr recovery timeouts test (elastic#38035) Fix ILM status to allow unknown fields (elastic#38043) Fix ILM Lifecycle Policy to allow unknown fields (elastic#38041) Update verify repository to allow unknown fields (elastic#37619) [ML] Datafeed deprecation checks (elastic#38026) Deprecate minimum_master_nodes (elastic#37868) Remove types from watcher docs (elastic#38002) Add test coverage for Painless general casting of boolean and Boolean (elastic#37780) Fixed test bug, lastFollowTime is null if there are no follower indices. Add ECS schema for user-agent ingest processor (elastic#37727) (elastic#37984) Extract TransportRequestDeduplication from ShardStateAction (elastic#37870)
…39399) * Extracted the logic for master request duplication so it can be reused by the snapshotting logic * Removed custom listener used by `ShardStateAction` to not leak these into future users of this class * Changed semantics slightly to get rid of redundant instantiations of the composite listener * Relates #37686
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ShardStateActionto not leak these into future users of this class