[IGNITE-14389] Implement simple in-memory meta storage

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha2
• Labels: iep-61 ignite-3
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Andrey N. Gura
• Reporter: Andrey N. Gura
• Reviewer: Alexander Lapin
• Created: 24/Mar/21 13:32
• Updated: 19/May/21 15:38
• Resolved: 19/May/21 15:38

Description

Simple in-memory meta storage should be implemented in order to:

• Unblock development of dependent components.
• Provide ability to develop integration tests.
• Verify concepts and approaches defined by interface.

In-memory meta storage should satisfy to the following requirements:

• It should implement interface (not literally of course) defined in IGNITE-14198 issue.
• It should use simple in-memory data structures as storage.
• It should be single-threaded for read-write requests (except of watch).
• Ranges reads could be processed in another thread but it is not mandatory in first iteration.

Issue Links

• Dependent: IGNITE-14414 Cluster initialization flow
• links to: GitHub Pull Request #129