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Merged
mlevkov merged 1 commit into from
Jul 6, 2026
Merged

Release v0.3.0 #27

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62 changes: 61 additions & 1 deletion CHANGELOG.md
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Expand Up @@ -9,6 +9,65 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

Nothing yet.

## [0.3.0] - 2026-07-05

Session-02 tech-debt sweep (PR #26): six registry records resolved, one
parked, two filed. Full eight-agent double review (Round 1 + Round 2);
artifacts under `docs/code-reviews/`.

### Added

- Token-limited half-open circuit-breaker probing: entering half-open
grants `success_threshold` probe tokens per `open_duration` window
(thundering-herd protection), with an anti-wedge re-grant and probe-token
release for outcomes that deliberately record neither success nor
failure; rejections are now labeled by breaker state in Prometheus
- End-to-end enforcement of client request deadlines: the parsed
`X-Request-Timeout` extension (previously stored but unused) now bounds
every Iggy operation through request-scoped client views, clamped so a
client may shorten but never extend the global operation timeout;
client-visible feedback (echoing the effective deadline) is tracked in
TD-2026-07-08 before the header joins the external API reference
- Resilience composition test matrix: the timeout/breaker/reconnect-retry
logic is extracted to `iggy_client::resilience::run_resilient` and
covered by a paused-clock test per branch, plus a Prometheus exporter
smoke test in its own test binary (183 unit / 30 integration / 18 model
/ 1 smoke tests)

### Changed

- Client-shortened deadlines no longer feed the shared circuit breaker
(a single client could previously open the circuit for everyone), and
request-scoped views no longer leak their deadline into the global
reconnect session or health probes (`Arc<Config>` + separate
per-view deadline; scoped clones are cheap)
- All third-party GitHub Actions pinned to full 40-char commit SHAs with
version comments; toolchain/tool selector tags converted to explicit
`with:` inputs
- Durable-storage guide re-validated key-by-key against upstream
`server-0.8.0`: the disk/S3 archiver section now documents a feature
removed upstream, retention is correctly attributed to the
default-disabled `data_maintenance.messages` cleaner, `message_saver`
defaults corrected (30 s interval, 1024-message threshold), and the
partitioning guide was reconciled to the same schema
- **Breaking**: `RequestTimeout`'s fields are private — `from_millis` is
the sole constructor and `duration()` the accessor — and
`metrics::record_circuit_breaker_rejection` takes a state label

### Removed

- **Breaking**: the unused `RequestTimeoutExt` trait and
`RequestTimeout::original_ms` (handlers extract `Option<RequestTimeout>`
directly via a new `OptionalFromRequestParts` impl)

### Fixed

- Half-open probes completing with non-connection errors no longer
permanently consume probe tokens (recovery-starvation cycle against a
healthy server)
- `force_open` on an already-open breaker no longer refreshes the open
window or inflates the times-opened counter

## [0.2.0] - 2026-07-05

### Security
Expand Down Expand Up @@ -132,6 +191,7 @@ triggers (`docs/tech-debt/`):
- Trusted proxy configuration for X-Forwarded-For validation
- Input validation to prevent injection attacks

[Unreleased]: https://github.com/mlevkov/iggy_sample/compare/v0.2.0...HEAD
[Unreleased]: https://github.com/mlevkov/iggy_sample/compare/v0.3.0...HEAD
[0.3.0]: https://github.com/mlevkov/iggy_sample/compare/v0.2.0...v0.3.0
[0.2.0]: https://github.com/mlevkov/iggy_sample/compare/v0.1.0...v0.2.0
[0.1.0]: https://github.com/mlevkov/iggy_sample/releases/tag/v0.1.0
2 changes: 1 addition & 1 deletion Cargo.lock
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2 changes: 1 addition & 1 deletion Cargo.toml
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@@ -1,6 +1,6 @@
[package]
name = "iggy_sample"
version = "0.2.0"
version = "0.3.0"
edition = "2024"
rust-version = "1.93.0"
description = "A comprehensive demonstration of Apache Iggy message streaming with Axum"
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3 changes: 2 additions & 1 deletion README.md
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Expand Up @@ -34,6 +34,7 @@ Apache Iggy is capable of processing millions of messages per second with ultra-

### Production-Ready Features
- **Connection resilience** with automatic reconnection and exponential backoff
- **Circuit breaker** with fail-fast rejection and token-limited half-open recovery probing
- **Rate limiting** with token bucket algorithm (configurable RPS and burst)
- **API key authentication** with constant-time comparison (timing attack resistant)
- **Request ID propagation** for distributed tracing
Expand All @@ -42,7 +43,7 @@ Apache Iggy is capable of processing millions of messages per second with ultra-

### Development & Testing
- Docker Compose setup for local development
- Comprehensive test suite (159 unit tests, 29 integration tests, 18 model tests)
- Comprehensive test suite (183 unit tests, 30 integration tests, 18 model tests, plus a metrics exporter smoke test)
- Integration tests with testcontainers (auto-spins Iggy server)
- Fuzz testing for input validation functions

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