Change Log

All notable changes to this project will be documented in this file, which follows the conventions of keepachangelog.com. This project adheres to Semantic Versioning.

Unreleased

...

2.0.50 - 2025-03-24

This PR fixes an issue in 2.x where, in very specific circumstances, the thread-binding machinery would throw an exception inside Manifold's deferred callback handlers.

Fixed

• Fix issue with Manifold thread-binding interaction. #11 PR#12

Changed

• Improve compatibility when used with custom CompletableFuture implementations.

2.0.47 - 2025-03-18

This major release contains a number of significant changes to simplify the library. The core functionality is unchanged, but several dependencies have been removed in order to streamline the code. These changes also make the library more compatible with Graal for native-image generation.

Changed

• Switch from Leiningen to tools.deps for building the library.

Removed

• Drop the alphabase dependency and inline the hex identifier generation.
• Drop the manifold dependency; instead, ken will operate on Java's built-in CompletionStage interface, which manifold Deferred values implement.
• Remove usage of clojure.spec in favor of simpler direct value predicates. These are compatible with malli schema definitions, though there is no direct usage of the library.
• Remove support for the legacy trace headers.

1.2.0 - 2023-03-20

Changed

• Update dependency versions.

Added

• The ken.tap/flush! function allows callers to block until all previously-sent events have been processed. #5 PR#6

1.1.0 - 2022-11-08

This release has potentially breaking changes if you have a dependency on the specific format of the trace and span identifiers. These changes move ken more in line with the OpenTelemetry standard to improve interoperability.

Changed

• Trace identifiers are now 16 bytes of hexadecimal (previously they were 12 bytes of base32). Span identifiers are now 8 bytes of hex (previously 6 bytes of base32). PR#3

Added

• A new set of functions in ken.trace contain logic for working with the OTel traceparent header instead of the custom X-Ken-Trace header. The previous functions are now deprecated. PR#4

1.0.2 - 2022-05-27

Changed

• Update dependencies to latest stable versions.

1.0.1 - 2021-12-27

Changed

• Update dependencies to latest stable versions.

1.0.0 - 2021-06-08

First production release! No changes since 0.3.0, but this reflects full internal adoption in Amperity's codebase.

0.3.0 - 2021-05-31

Changed

• Tag macro closures with ^:once metadata to avoid unexpected object retention.

Added

• Add tracing header support to ken.trace.

0.2.0 - 2021-05-24

Initial open-source project release.

Changed

• Stripped amperity prefix from namespaces and keywords.
• Extend test coverage of code.