Virtual-Thread TCP Server
Java 25 virtual-thread-per-connection networking. Thousands of concurrent clients per node without thread-pool tuning.
LoomCache Documentation
Raft-consistent, virtual-thread-native, and honestly documented. Built in Java 25 from scratch.
Architecture in Motion
Section titled “Architecture in Motion”LoomCache implements Raft consensus directly over a custom 108-opcode binary protocol.
Raft Consensus Flow
Waiting for client request...
Client
Follower 1
Follower 2
Core Features
Section titled “Core Features”Linearizable by Default
Single-group Raft with pre-vote, leader lease, ReadIndex, and WAL + snapshot persistence. Every committed write is replicated to a majority before acknowledgment.
Honest Data-Structure Story
Client SDK exposes Map, Queue, Set, Topic, and a linearizable AtomicLong today. Production sharding, wire locks/semaphores, local JCache durability, MapStore, SQL indexes, server LRU/LFU/FIFO/RANDOM, finite eviction, max-idle, and implicit POJO object mode remain unsupported in this release.
Zero Cache Dependencies
No Hazelcast port, no Redis fork, and no Netty in the core protocol runtime. Custom binary protocol, Kryo 5.6.2 serialization, optional Netty TLS contexts, Calcite-backed SQL engine, and Spring Boot 4.0.5 auto-configuration.
Chaos-Tested
Java Jepsen-style harness: linearizability / partition / disk / clock / process / combined scenarios with a Wing-Gong checker. 17,000+ test methods across 748 test files.
Observability Built In
Micrometer metrics, Prometheus scrape endpoint, JMX MXBeans, optional OpenTelemetry bridge, cluster health monitor, slow-query log, and a built-in dashboard at /dashboard.
Reliability Engineered
Section titled “Reliability Engineered”Houston, We Have Zero Failures
14,100+ tests across 637 test files verify linearizability across 35 chaos fault scenarios
35
Fault Scenarios
6
Test Categories
100%
Verified