[IGNITE-21340] Allow removing data with DataStreamer

• Type: Epic
• Status: In Progress
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0-beta1
• Fix Version/s: 3.0.0-beta2
• Component/s: thin client
• Labels: ignite-3
• Epic Name: DataStreamer Data Removal
• Assignee: Pavel Tupitsyn
• Reporter: Pavel Tupitsyn
• Created: 23/Jan/24 14:16
• Updated: 07/Feb/24 18:02

Description

Ignite 2.x allows removing data with DataStreamer, provide the same ability in Ignite 3.

• We can introduce something like Tuple.tombstone method to indicate removal through the Flow.Publisher API. But this won't work with POJOs
• Alternatively, wrap every item: instead of Flow.Publisher<T> the API will accept Flow.Publisher<StreamerItem<T>>, which can be used like publisher.submit(StreamerItem.ofDeleted(new PersonPojo(...)))

Issue Links

• links to: GitHub Pull Request #3114