MicroRaft Versions Save

Fixes:

• Delete snapshot chunks while truncating log entries
• [Fix linearizable query quorum calculation when learners are present] (https://github.com/MicroRaft/MicroRaft/commit/c76834251fc2c856f0abc126b777cc8a2bab0072)

Change log

New APIs:

• Timeout parameter is introduced to the RaftNode.query() API for monotonic-read / read-your-writes queries (https://github.com/MicroRaft/MicroRaft/commit/bf415940d4dc9d82bea4e178a019fe42e14bc6b1).
• Barrier-like API is introduced (https://github.com/MicroRaft/MicroRaft/commit/8fcf980168b752e18ee8b959de78fba48c19ffea).

Bug fixes:

• A rare bug that can occur for LINEARIZABLE queries during membership changes is fixed (https://github.com/MicroRaft/MicroRaft/commit/8cef993357980797970c0979681e0e78aa1a4732).

Backward incompatible changes:

• QueryPolicy.BOUNDED_STALENESS is deleted (https://github.com/MicroRaft/MicroRaft/commit/543fc2022072381de448218da243f9254f635720). The guarantee provided by the implementation is way weaker than what BOUNDED_STALENESS actually means. Users can replace its usage with QueryPolicy.EVENTUAL_CONSISTENCY.
• The old RaftNode.query() API is deleted in favour of the new API (https://github.com/MicroRaft/MicroRaft/commit/c62c819e7370cf3d22390ff64e76115c3b42b641). Users can just update their call sites for the new API.

How to use

<dependency>
    <groupId>io.microraft</groupId>
    <artifactId>microraft</artifactId>
    <version>0.6</version>
</dependency>

Change log:

• New API is added to the RaftNodeReport to expose liveness of Raft nodes: https://github.com/MicroRaft/MicroRaft/commit/917edc604c329689ec9e247063951e8e728fc9ce
• RaftStoreSerializer is moved the core MicroRaft module. This is a breaking change in the sense that its implementations need to update their import statements.

How to use MicroRaft 0.5:

<dependency>
    <groupId>io.microraft</groupId>
    <artifactId>microraft</artifactId>
    <version>0.5</version>
</dependency>

RaftNode#takeSnapshot() method is added. It can be used for manually triggering snapshots on local RaftNode.

Initial release