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https://issues.apache.org/jira/browse/IGNITE-28938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anton Vinogradov updated IGNITE-28938:
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Labels: IEP-132 (was: )
> Split MarshallableMessage: callback before send vs marshalling
> --------------------------------------------------------------
>
> Key: IGNITE-28938
> URL: https://issues.apache.org/jira/browse/IGNITE-28938
> Project: Ignite
> Issue Type: Sub-task
> Components: messaging
> Reporter: Anton Vinogradov
> Assignee: Anton Vinogradov
> Priority: Major
> Labels: IEP-132
> Fix For: 2.19
>
>
> *No wire format change.*
> h3. Goal
> Do not give a marshaller to messages that only need a callback before send.
> h3. Why
> {{MarshallableMessage}} is used for two different things. 12 of its 21
> implementations really use the marshaller. The other 8 use neither the
> marshaller nor the class loader - they only change their own fields:
> * {{CacheContinuousQueryEntry}} - clears data;
> * {{GridCacheEntryInfo}} - recalculates TTL;
> * {{GridDhtPartitionsFullMessage}} and {{GridDhtPartitionsSingleMessage}} -
> copy and zip partition maps;
> * {{GridNearTxPrepareRequest}} - sets an expiry policy flag;
> * {{ColocationGroup}} - packs bits;
> * {{CompressedMessage}} and {{GridH2ValueMessage}}.
> All 8 still get a {{Marshaller}} field in the generated companion.
> h3. How
> * add a new interface for the callback, with no marshaller and no class
> loader;
> * move these 8 classes to it, so the generator calls the callback instead of
> {{msg.marshal(marshaller)}};
> * keep {{MarshallableMessage}} for the other 12.
> h3. Expected result
> The type now shows if a class needs a marshaller. 8 companions lose the
> field. {{GridTestUtils#loadMarshaller}} becomes correct again: it picks a
> constructor by {{instanceof MarshallableMessage}}, while the generator uses
> {{marshallable || hasMarshalled}}.
> h3. How to verify
> Full build and the message tests. Generated code of these 8 classes must stay
> the same, except the removed field.
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