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Axon Framework

⭐ Features

  • feat(eventsourcing): EventStoreTransaction - allow overriding AppendCondition calculated from sourcing (#4291, PR [#4295], by @MateuszNaKodach)
  • Add annotated and declarative handler interceptor support for events, commands, and queries (#3485, PR [#4515], by @abuijze)
  • Add exception handler support for command, event, and query handling components (#3062, PR [#4520], by @abuijze)
  • Configure application wide Clock (#3083, PR [#4592], by @jangalinski)
  • Message Transformation / Upcasting - Demo (#137, PR [#4624], by @laura-devriendt-lemon)
  • Add collect, flatMap and mapMulti methods to MessageStream API (#4627, by @hjohn)
  • Message Transformation - Sourcing Criteria widening for sourcing (#137, PR [#4638], by @laura-devriendt-lemon)
  • Message Transformation - Rename support (phase 4) (#137, PR [#4642], by @laura-devriendt-lemon)
  • Message Transformation - Drop / Filter support (phase 5) (#137, PR [#4648], by @laura-devriendt-lemon)
  • Decorate CommandBus in RetryingCommandBus when a RetryScheduler is present (#4652, PR [#4662], by @smcvb)
  • Merge Message Transformation support (#137, PR [#4689], by @smcvb)
  • chore(tracing): remove OpenTelemetry extension (will be moved to Axoniq Framework) (#3594, PR [#4720], by @MateuszNaKodach)

📈 Enhancements

  • Fix fromFuture to return Empty stream when future completes with null (#4516, by @abuijze)
  • Cleanup/remove deprecated modules (#4524, by @abuijze)
  • phase 0 Replace thenRun + joinAndUnwrap with thenCompose in Coordinator#abortWorkPackage (#3773, PR [#4527], by @laura-devriendt-lemon)
  • phase 1 Make ClaimTask, SplitTask and MergeTask fully async (#3773, PR [#4530], by @laura-devriendt-lemon)
  • phase 2 remove joinAndUnwrap from workPackage and coordinator (#3773, PR [#4536], by @laura-devriendt-lemon)
  • phase 3 Remove joinAndUnwrap from PooledStreamingEventProcessor (#3773, PR [#4540], by @laura-devriendt-lemon)
  • Document PooledStreamingEventProcessor lifecycle and start() … (#3773, PR [#4541], by @laura-devriendt-lemon)
  • Replace joinunwrap usage from PooledStreamingEventProcessor (#3773, PR [#4552], by @laura-devriendt-lemon)
  • Return failed futures from InMemoryTokenStore (#4546, PR [#4559], by @wadhwaroh-lang)
  • Account for async snapshot storage in SnapshottingEntityLifecycleHandlerTestSuite (#4595, by @hatzlj)
  • fix(messaging): token store intit loses spring transaction pooled streaming processor (#4632, PR [#4645], by @laura-devriendt-lemon)
  • Added a DCB skill based on AF API, AS API, and theoretical resources available (#4654, by @m1l4n54v1c)
  • Message Transformation - Semantic matching docs + demo (#137, PR [#4660], by @laura-devriendt-lemon)
  • Disable sonar for builds (#4680, by @hatzlj)
  • Surface Errors from UnitOfWork actions instead of hanging silently (#4697, by @MateuszNaKodach)
  • [Port] fix(migration): honor skipTests property (#4700, by @MateuszNaKodach)
  • Migrate routingKey to @Command annotations (#4704, by @klauss42)
  • Adjust generics of registerIfNotPresent to match register (#4717, by @hjohn)
  • Allow EventProcessorDefinitions to supply an event source for a subscribing processor (#4721, PR [#4722], by @hatzlj)
  • AF4 MultiSourceLegacyToken classname compatibility fix (#4633, PR [#4724], by @laura-devriendt-lemon)

🪲 Bug Fixes

  • Port 5.1.x to main (#4399, by @hatzlj)
  • Port post 5.1.0-RC3 release to main (#4452, by @smcvb)
  • Port 5.1.x to main (#4472, by @hatzlj)
  • Fix documentation build (#4547, by @abuijze)
  • Fix duplicate command handler registration when subtype overrides handler (#3934, PR [#4550], by @hatzlj)
  • revert main to state before 4060 (#4060, PR [#4557], by @laura-devriendt-lemon)
  • Port: axon 5.1.x -> main (#4572, by @hatzlj)
  • Merge branch 'axon-5.1.x' (#4590, by @hjohn)
  • Validate ProcessingContext is committed in SimpleQueryBus on emitUpdate, completeSubscriptions, and completeSubscriptionsExceptionally invocations (#4594, PR [#4602], by @smcvb)
  • Port/axon 5.1.x main (#4617, by @hatzlj)
  • Avoid costly stack walk on every task start in AxonTimeLimitedTask (#4635, by @hjohn)
  • Introduce the EventTypeResolver for EventStorageEngines | Allows for default versions (#4625, PR [#4665], by @smcvb)
  • Register the micrometer MetricsConfigurationEnhancer only once when using Spring Boot (#4634, PR [#4666], by @smcvb)
  • Propagate all entry resources to per-event ProcessingContext (#4647, PR [#4669], by @hatzlj)
  • [Port] fix(messaging): disposing a Flux does not close the underlying subscription query (#4678, by @smcvb)
  • AggregateBasedJpaEventStorageEngine#stream loops until StreamingCondition matching events are retrieved (#4643, PR [#4684], by @smcvb)
  • [Port] Align QualifiedName#(Class) outcome with annotated approach for nested classes (#4685, by @smcvb)
  • Re-Add JdbcTokenstore to the streaming event processors reference (#4692, by @hatzlj)
  • Skip interceptor members when applying @SequencingPolicy (#4705, PR [#4706], by @abuijze)
  • fix(messaging): preserve enhancers in UnitOfWorkConfiguration#forcedSameThreadInvocation (#4714, by @MateuszNaKodach)
  • Align snapshotting annotation with documentation (#4715, by @hjohn)
  • Wrap ESE when it is not the same instance providing SnapshotStore (#4716, by @hjohn)
  • AF5 application cannot start with TokenStore containing AF4 tokens bug (#4633, PR [#4718], by @laura-devriendt-lemon)
  • SpringComponentRegistry - Handle missing Spring components adhering to the ComponentRegistry contract (#4719, by @MateuszNaKodach)

📖 Documentation

  • Repository Transfer notice - main (#4416, by @smcvb)
  • Migration Path AI instructions (#4479, by @smcvb)
  • Add Note for change in Jackson 3 converter default behaviour (#4414, PR [#4496], by @hatzlj)
  • Fix Note for change in Jackson 3 converter default behaviour (#4414, PR [#4501], by @hatzlj)
  • Restructure Release Notes navigation in framework reference (#4503, by @hatzlj)
  • Relocate the Kotlin module description to include it in the correct section (#4506, by @hatzlj)
  • Migration path - Data Protection - Reference to path in other repository (#28, PR [#4525], by @smcvb)
  • Include Axoniq Feature Indicator in navigation (#4529, by @hatzlj)
  • docs: fix Antora build warnings and Vale style suggestions (#4532, by @abuijze)
  • Align completeness between old Aggregate and new Entity description (#4060, PR [#4562], by @laura-devriendt-lemon)
  • Add agent hints for branch naming and commit messages (#4569, by @hatzlj)
  • Update Documentation readme and local build/preview script (#4063, PR [#4582], by @hatzlj)
  • Integrate "Framework Comparison" page into Navigation and Introduction (#4597, by @smcvb)
  • Adjust Subscribable Eventsource API and move reference documentation for persistent streams (#4616, by @hatzlj)
  • Message Transformation / Upcasting - Documentation (#137, PR [#4629], by @laura-devriendt-lemon)
  • Adjust documentation on event processor assignment (#4646, by @hatzlj)
  • move Event Transformation reference docs to Axoniq Framework (#137, PR [#4664], by @laura-devriendt-lemon)
  • Add AF 5.1.2 Release Notes (#4687, by @smcvb)
  • Re-Add JdbcTokenstore to the streaming event processors reference (#4690, by @hatzlj)
  • docs: change DLQ migration docs to use DeadLetterQueueConfiguration extension API (#4696, by @MateuszNaKodach)
  • Document Axon Framework 4 snapshot reuse limitation (#4640, PR [#4725], by @laura-devriendt-lemon)

🛠️ Dependency Upgrades

  • chore: set next dev version to 5.2.0-SNAPSHOT (#4370, by @jangalinski)
  • chore(deps): bump the maven-dependencies group with 21 updates (#4518, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group in /examples/university-java-springboot-4 with 2 updates (#4522, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 4 updates (#4523, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 10 updates (#4560, by @app/dependabot)
  • chore(deps-dev): bump @antora/cli from 3.2.0-alpha.11 to 3.2.0-alpha.12 in /docs/_playbook (#4584, by @app/dependabot)
  • chore(deps-dev): bump @antora/site-generator from 3.2.0-alpha.11 to 3.2.0-alpha.12 in /docs/_playbook (#4585, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 8 updates (#4586, by @app/dependabot)
  • chore(deps-dev): bump qs from 6.14.2 to 6.15.2 in /docs/_playbook (#4611, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 11 updates (#4612, by @app/dependabot)
  • chore(deps): bump tools.jackson:jackson-bom from 3.1.3 to 3.1.4 in /examples/university-java-springboot-4 in the maven-dependencies group (#4621, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 14 updates (#4622, by @app/dependabot)
  • chore(deps): bump io.axoniq.framework:axoniq-framework-bom from 5.1.1-SNAPSHOT to 5.1.1 (#4623, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 13 updates (#4641, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group in /examples/university-java-springboot-4 with 2 updates (#4650, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 21 updates (#4651, by @app/dependabot)
  • chore(deps): bump the github-dependencies group with 2 updates (#4673, by @app/dependabot)
  • chore(deps-dev): bump @antora/cli from 3.2.0-alpha.12 to 3.2.0-rc.2 in /docs/_playbook (#4674, by @app/dependabot)
  • chore(deps-dev): bump @antora/site-generator from 3.2.0-alpha.12 to 3.2.0-rc.2 in /docs/_playbook (#4675, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 6 updates (#4676, by @app/dependabot)
  • chore(deps): bump the github-dependencies group with 2 updates (#4694, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 22 updates (#4695, by @app/dependabot)
  • chore(deps): bump the maven-dependencies group across 1 directory with 18 updates (#4707, by @app/dependabot)

❤️ Contributors

A heartfelt thank you to all contributors who worked on this section:

Axoniq Framework

⭐ Features

  • Migrate core persistent streams API from AF4 (PR [#135], by @hatzlj)
  • Enhancement/137/spec message transformator (PR [#138], by @laura-devriendt-lemon)
  • Message Transformation / Upcasting - Specification (#137, PR [#143], by @laura-devriendt-lemon)
  • Message Transformation / Upcasting - Module setup (phase 1) (#137, PR [#151], by @laura-devriendt-lemon)
  • Message Transformation / Upcasting - SPI foundation (phase 2) (#137, PR [#152], by @laura-devriendt-lemon)
  • Message Transformation - Transform Chain and Event Store Decoration (phase 3) (#137, PR [#153], by @laura-devriendt-lemon)
  • Message Transformation - Sourcing Criteria widening for sourcing (#137, PR [#160], by @laura-devriendt-lemon)
  • Implement SnapshotStore for PostgresqlEventStorageEngine (PR [#163], by @hjohn)
  • Message Transformation - Rename support (phase 4) (#137, PR [#164], by @laura-devriendt-lemon)
  • Message Transformation - Drop / Filter support (phase 5) (#137, PR [#167], by @laura-devriendt-lemon)
  • Merge Message Transformation support (#137, PR [#193], by @smcvb)
  • Persistent Streams Autoconfiguration (#123, PR [#196], by @hatzlj)

📈 Enhancements

  • Include the data protection module in the axoniq framework bom for convenience (PR [#130], by @hatzlj)
  • fix the slack-release-notification.yml (PR [#141], by @hatzlj)
  • build: unified apidocs profile and publish workflow (PR [#156], by @abuijze)
  • Remove _archive folder (PR [#166], by @hjohn)
  • Message Transformation - Semantic matching: exact precedence + from(List) (phase 6) (#137, PR [#178], by @laura-devriendt-lemon)
  • Disable sonar for builds (PR [#187], by @hatzlj)
  • Improve flaky integration tests (PR [#189], by @hatzlj)
  • cleanup remainders of the _archive folder (PR [#202], by @hatzlj)
  • AF4 MultiSourceLegacyToken classname compatibility fix (#4633, PR [#228], by @laura-devriendt-lemon)

🪲 Bug Fixes

  • Port axon 5.1.x to main (PR [#114], by @hatzlj)
  • Align listing approach with Event Storage Engine parent page (PR [#115], by @smcvb)
  • Adjust import for TerminalEventMessage (PR [#132], by @hatzlj)
  • Fix failing tests (PR [#136], by @hatzlj)
  • Port (5.1.x): [#108] docs(dead-letter-queue): document DLQ transactional behavior (PR [#150], by @hatzlj)
  • [#4625 | Port] Use EventTypeResolver in Axon Server EventStorageEngines to default null revision to default version (PR [#188], by @smcvb)
  • Support source with snapshot in single server call (PR [#220], by @hjohn)
  • Ensure message type version for Commands/Queries sent from AF4 to AF5 applications ([#4698], PR [#225], by @hatzlj)
  • Allow to gracefully handle events without revision for persistent streams ([#4625], PR [#227], by @hatzlj)

📖 Documentation

  • Include Axoniq Data Protection release notes and module description in the framework reference (PR [#97], by @hatzlj)
  • Include Axoniq Workflow Engine release notes and module description in the framework reference (PR [#99], by @hatzlj)
  • Move workflow module table listing to workflow-repo for easier maintenance (PR [#101], by @hatzlj)
  • Add migration guide for 5.0 -> 5.1 (#77, PR [#106], by @hatzlj)
  • Include Axoniq feature indicator in navigation (PR [#107], by @hatzlj)
  • Clarify migration of the AxonServerContainer from 5.0 -> 5.1 (#77, PR [#112], by @hatzlj)
  • Add anchors for the event storage engines to allow referencing (PR [#117], by @hatzlj)
  • Fix the maven coordinates for axoniq-postgresql in the reference (PR [#119], by @hatzlj)
  • Fix Modules Documentation (remove opentracing) (PR [#128], by @hatzlj)
  • Introduce Framework Comparison page (PR [#134], by @smcvb)
  • add Event Transformation reference docs (moved from Axon Framework) (#137, PR [#179], by @laura-devriendt-lemon)
  • adapt moved Event Transformation docs + address review nits (#137, PR [#180], by @laura-devriendt-lemon)
  • Add 5.1.1 and 5.1.2 Release Notes (PR [#191], by @smcvb)
  • docs: use DeadLetterQueueConfiguration extension API in DLQ reference (PR [#197], by @MateuszNaKodach)
  • Fix configuration example for EventProcessorDefinition based persistent streams configuration (PR [#224], by @hatzlj)

🛠️ Dependency Upgrades

  • Bump io.opentelemetry:opentelemetry-api from 1.60.1 to 1.62.0 in /_archive/extensions/tracing/tracing-opentelemetry (PR [#121], by @app/dependabot)
  • Bump @antora/site-generator from 3.2.0-alpha.11 to 3.2.0-alpha.12 in /docs/_playbook (PR [#125], by @app/dependabot)
  • Bump @antora/cli from 3.2.0-alpha.11 to 3.2.0-alpha.12 in /docs/_playbook (PR [#126], by @app/dependabot)
  • Bump the maven-dependencies group with 4 updates (PR [#127], by @app/dependabot)
  • Bump qs from 6.14.2 to 6.15.2 in /docs/_playbook (PR [#145], by @app/dependabot)
  • Bump the maven-dependencies group with 3 updates (PR [#146], by @app/dependabot)
  • Bump the maven-dependencies group with 6 updates (PR [#154], by @app/dependabot)
  • Bump the maven-dependencies group with 5 updates (PR [#161], by @app/dependabot)
  • Bump the maven-dependencies group with 7 updates (PR [#170], by @app/dependabot)
  • Bump the github-dependencies group with 4 updates (PR [#182], by @app/dependabot)
  • Bump @antora/site-generator from 3.2.0-alpha.12 to 3.2.0-rc.2 in /docs/_playbook (PR [#183], by @app/dependabot)
  • Bump the maven-dependencies group with 4 updates (PR [#184], by @app/dependabot)
  • Bump js-yaml and @antora/cli in /docs/_playbook (PR [#185], by @app/dependabot)
  • Bump the github-dependencies group with 2 updates (PR [#194], by @app/dependabot)
  • Bump the maven-dependencies group with 4 updates (PR [#195], by @app/dependabot)
  • Bump the maven-dependencies group with 8 updates (PR [#215], by @app/dependabot)
  • [chore]: Add missing axoniq-message-transformation to combined coverage report (PR [#217], by @hatzlj)

❤️ Contributors

A heartfelt thank you to all contributors who worked on this section:

Source: README.md, updated 2026-07-09