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Changelog

All notable changes to this project will be documented in this file.

This project adheres to Semantic Versioning.

For Helidon 3.x releases please see Helidon 3.x CHANGELOG.md

For Helidon 2.x releases please see Helidon 2.x CHANGELOG.md

For Helidon 1.x releases please see Helidon 1.x CHANGELOG.md

4.0.0-ALPHA3

This is the third Alpha build of Helidon 4.0.0 and is intended as a preview release only. Do not use this release in production. It is suitable only for experimentation. APIs are subject to change. Documentation is incomplete. And some functionality is experimental and not fully tested.

The big news in Helidon 4.0.0 is the introduction of Helidon Nima -- a ground up webserver implementation based on JDK Project Loom virtual threads.

Helidon 4.0.0 is a major release that includes significant new features and fixes. As a major release it also includes some backward incompatible API changes.

Java 19 or newer is required to use Heldon 4.0.0-ALPHA3.

MicroProfile Support

4.0.0-ALPHA3 now supports MicroProfile 5 running on Nima WebServer. Please give it a try! If you are upgrading an existing Helidon 3.x MicroProfile application and run into an error concerning io.common.HelidonConsoleHandler then change logging.properties to use io.helidon.logging.jul.HelidonConsoleHandler instead.

CHANGES

  • CORS: Fix CORS annotation handling error in certain cases 5105
  • Common: Add info to CharBuf exceptions 5376
  • Common: Features formatting 5765
  • Common: Fix inconsistent status name. 5641
  • Common: Name all threads. 5397
  • Common: builder interceptor support 5591
  • Common: custom exception for CharBuffer 5505
  • Config: Add built-in enum config support 5795
  • Config: Cannot debug in Eclipse IDE Version: 2022-09 (4.25.0) #5706 5708
  • Config: Provide MP config profile support for application.yaml (#5565) 5586
  • DBClient: Handle exception on inTransaction apply 5700
  • Fault Tolerance: Fixed race condition on bulkhead. 5747
  • FaultTolerance:Use lazy values to initialized HealthSupport FT handlers 5147
  • GraalVM: 4836 graalvm 22 4.x 5378
  • Grpc: Issue 4567 - Grpc component Does not handle package directive in proto files. 5284
  • Health: Builtin Helidon health features doubling fix 5615
  • Health: Pass correct config to health providers 5572
  • JMS: JMS connector update 5592
  • LRA: 5405 LRA recovery cycle detection 5778
  • LRA: LRA false warning 5556
  • Logging: Observe log 5656
  • MP Client: Client tracing interceptor no longer clears exception 5620
  • MP FaultTolerance: Implementation of MP FT over Nima VTs 5271
  • MP Messaging: Bump-up reactive messaging/ops to 3.0 5526
  • MP Metrics: Fix problems causing MP metrics TCK failures 5631
  • MP Metrics: Move fetch of metrics from endpoint so it too is retried 5143
  • MP: Add null check to MP Server.Builder.config() (#5363) 5374
  • Media: Added method hasEntity to readable entity 5602
  • Media: Support customize encoder and media context in Nima WebServer (#5256) 5257
  • Messaging: 5510 kafka prod nack 4x 5531
  • Metrics: Fix improper handling of metrics global tags 5814
  • Metrics: Fix incorrect tags comparison when trying to match metric IDs 5550
  • MicroProfile: MP on Níma 5176
  • OpenAPI: 5650 openapi examples issues 5651
  • Pico: Introduce Pico ConfigBean Builder Extensions 5482
  • Pico: Consolidates the pico spi with the api into the new replacement "pico" module 5400
  • Pico: Extend Builder to support abstract and concrete codegen, and add validation of required attributes during builder().build() 5228
  • Pico: Introduce Helidon Pico 5141
  • Pico: Introduces Pico Builder 5195
  • Pico: Move bean utils from spi to processor 5448
  • Pico: Pico Tools - Part 1 of N 5598
  • Reactive: Multi.forEachCS 5532
  • Security: Accidentally removed updateRequest method returned 5843
  • Security: Add relativeUris flag in OidcConfig to allow Oidc webclient to use relative path on the request URI 5336
  • Security: CipherSuiteTest intermittent failure 5711
  • Security: Jwt scope handling extended over array support 5573
  • Security: OIDC multi-tenant and lazy loading implementation 5846
  • Security: Use only public APIs to read PKCS#1 keys 5240
  • WebClient: Custom DNS resolvers for Nima 4876
  • WebServer Nima: Add WebServer.Builder configuration option to support not registering JVM shutdown hook 5739
  • WebServer: 5409 duration timeout 5709
  • WebServer: Add Context to Loom Webserver. 5593
  • WebServer: Add Max Re-Route configurable 5587
  • WebServer: Add ServerResponse.reset() to support ErrorHandlers 5694
  • WebServer: AllowThreadLocals configurable 5292
  • WebServer: Error handling support in HTTP for Nima WebServer. 5436
  • WebServer: Fix handling of entity length in HTTP/2. 5610
  • WebServer: Fix handling of optional whitespace at the beginning of headers. 5441
  • WebServer: Fix user log entry of access log. 5715
  • WebServer: HTTP upgrade handler for Websockets 5569
  • WebServer: Níma: Static content handling rework 5543
  • WebServer: NullPointerException when there is an illegal character in the request (#5470) 5472
  • WebServer: Support for "raw protocol" string 5575
  • WebServer: Support for optional entity in Níma. 5200
  • WebServer: Throw an exception when route does not finish, reroute, or next 5834
  • WebServer: set transfer encoding as response header 5646
  • WebSocket: Tyrus integration into Nima 5464
  • Build: Remove dependency on yaml config from nima module. 5381
  • Build: Remove license-report from maven lifecycle 5246
  • Build: Upgrade dependency check plugin to 7.4.4 5807
  • Build: cleanup pom files with duplicate declarations of maven-compiler-plugin 5810
  • Dependencies: Fix Guava version to match that required by the grpc-java libraries 5504
  • Dependencies: Manage protobuf version using BOM 5178
  • Dependencies: Neo4j driver update 5751
  • Dependencies: Ugrade jersey to 3.0.9 5789
  • Dependencies: Upgrade PostgreSQL JDBC driver dependency to 42.4.3 5561
  • Dependencies: Upgrade build-tools to 3.0.3, fix hbs template file copyright 5735
  • Dependencies: Upgrade grpc-java to 1.49.2 5361
  • Dependencies: Upgrade netty to 4.1.86.Final and use netty bom 5734
  • Dependencies: Upgrade protobuf-java 5134
  • Dependencies: Upgrade to jackson-databind-2.13.4.2 via bom 2.13.4.20221013 5304
  • Docs: 5618 flatMapCompletionStage javadoc fix 5624
  • Docs: Replace deprecated ServerConfiguration.builder() on WebServer.builder() in docs (#5023) 5121
  • Docs: WLS connector doc typo 5802
  • Examples: 4269 openapi tools examples 5250
  • Examples: Make JSON-B a default option for Helidon MP projects 5207
  • Examples: Use property to skip execution of eclipselink weave 5312
  • Examples: [Archetypes] database choices should be before packaging 5293
  • Examples: remove -Ddocker.build=true 5485
  • Examples:Tracing config updates in archetype 5001
  • Tests: Intermittent failure (WebClient tracing test) 5755
  • Tests: Add some retries because post-request metrics updates occur after the response is sent 5122
  • Tests: Additional testing for Nima's websocket implementation 5595
  • Tests: Close client after each test to avoid intermittent failures on MacOS 5155
  • Tests: Fix Intermittent TestJBatchEndpoint.runJob 5542
  • Tests: Fix Intermittent TestJBatchEndpoint.runJob 5567
  • Tests: Fix intermittent jBatch test 5249
  • Tests: Fix problems in tracing e2e test 5280
  • Tests: Fixed OpentraceableClientE2ETest to be more deterministic 5536
  • Tests: Log4j integration test 5301
  • Tests: MP Opentracing TCK fix 5599
  • Tests: Make Github pipeline more robust by increasing HTTP ttl and adding a retry 5164
  • Tests: Named port Nima ServerTest and RoutingTest 5551
  • Tests: New FT Nima executors and larger multiplier for TCK timeouts in pipeline 5317
  • Tests: Remove retries from executor metrics test fix; use the pre-existing countdown latch in GreetService instead 5109
  • Tests: Simplify named socket WebTarget injection in Tests 5314
  • Tests: TempDir support for tests 5508
  • Tests: Updated bulkhead test to properly wait until Task 1 is enqueued 5562
  • Tests: Updated test to use in-memory logging handler to avoid problems with flushing 5180
  • Tests: Various metrics test improvements to avoid intermittent failures 5611

4.0.0-ALPHA2

This is the second Alpha build of Helidon 4.0.0 and is intended as a preview release only. Do not use this release in production. It is suitable only for experimentation. APIs are subject to change. Documentation is incomplete. And some functionality is experimental and not fully tested.

The big news in Helidon 4.0.0 is the introduction of Helidon Nima -- a ground up webserver implementation based on JDK Project Loom.

Helidon 4.0.0 is a major release that includes significant new features and fixes. As a major release it also includes some backward incompatible API changes.

Java 19 is required to use Heldon 4.0.0.

CHANGES

  • Common: Refactor HTTP header class names to a more natural approach. 4858
  • Config: Refactor helidon config 4.0 4776
  • Config: Use common Config in common configurable. 5015
  • Config: fix for issue in handling ConfigProperties using List 4959
  • DBClient: Helidon DBClient does not trigger an Exception when no sane DB connection can be obtained 4773
  • Dependencies: Upgrade EclipseLink to 3.0.3 and Hibernate to 6.1.4.Final 5101
  • Dependencies: Upgrade reactive streams to 1.0.4 5046
  • Dependencies: Upgrade snakeyaml to 1.32 4923
  • Dependencies: Update graphql-java to 17.4 4983
  • FT: retry checkMetricsForExecutorService 5103
  • JAX-RS: Register a low-priority exception mapper to log internal errors 5082
  • Logging: Logging refactoring 4825
  • MicroProfile: Fix identification of parallel startup of CDI 4964
  • Native Image: remove redundant reflect-config.json 4844
  • Nima: Context support for Níma WebServer 4867
  • Nima: Perf improvements 4818
  • Nima: Port and cleanup of old reactive tests for Nima bulkheads 4823
  • Nima: Shutdown executors while stopping the server 4819
  • Reactive: MultiFromBlockingInputStream RC fix 4x 5055
  • Security: Access token refresh - 4.x backport 4822
  • WebServer: Default header size increased to 16K for Http1ConnectionProvider in NIMA 5017
  • WebServer: Use Header.create() for both header names and header values. 4864
  • WebServer: Watermarked response backpressure 4x 5063
  • Doc: Fix invalid example in se/config/advanced-configuration.adoc - backport 4.x (#4775) 4944
  • Doc: Fix misplaced attribute settings 4955
  • Doc: Formatting of generated Helidon SE quickstart 4967
  • Doc: Preamble fix 5051
  • Doc: Ported Access Log documentation to 4.x 5054
  • Examples: 4834 4835 fix archetype test issues 4841
  • Examples: Remove module-info files from examples 4895
  • Examples: WebClient dependency in generated Helidon SE Quickstart should be in test scope 5019
  • Examples: add serial config required for oracle driver 4961
  • Examples: fix db issues in Helidon archetype 4805
  • Examples: k8s and v8o support in archetype 4891
  • Test: 5068 mock connector beans xml 4x 5070
  • Test: Ported TestInstance.Lifecycle.PER_CLASS fix to 4.x 5052
  • Test: Updated intermittently failing CircuitBreakerTest 5033
  • Test: Add robustness to some of the timing-susceptible metrics tests; add util matcher with retry 5032
  • Test: EchoServiceTest timeout 5007
  • Test: Ported combined FT test to Nima and enhancements to Async 4840
  • Test: Removed deprecated tests, disabled pipelining test. 5010
  • Test: Special Windows build Config TCK profile no longer needed - 4.x 4870
  • Test: Vault tests 5026
  • Test: integration tests should run on every build 5080

4.0.0-ALPHA1

We are pleased to announce Helidon 4.0.0-ALPHA1. This is the first Alpha build of Helidon 4.0.0 and is intended as a preview release only. Do not use this release in production. It is suitable only for experimentation. APIs are subject to change. Documentation is incomplete. And some functionality is experimental and not fully tested.

The big news in this build is the introduction of Helidon Nima -- a ground up webserver implementation based on JDK Project Loom. More information to come.

Helidon 4.0.0 is a major release that includes significant new features and fixes. As a major release it also includes some backward incompatible API changes.

Notable Changes

  • Java 19 early access (with Loom support) as the minimal Java version
  • Using System.Logger instead of java util logging (incremental change)
  • HelidonServiceLoader is now part of helidon-common module
  • Introduction of @Weight, Weighted and Weights instead of @Priority and Prioritized, to base ordering on a double (allows to fit a component between any other two components), all modules using priority are refactored (except for MicroProfile where required by specifications).
    • higher weight means a component is more important
    • moved priority related types to MP config (as that is the lowest level MP module)
    • replaces all instances in SE that use priority with weight (no dependency on Jakarta, predictible and easy to understand behavior)
  • Introduction of MediaType as the abstraction of any media type, as used by Config, static content and HTTP in general. See MediaType and MediaTypes
  • MapperManager now supports mapping qualifiers
  • new helidon-common-parameters module contains an abstraction of a container that has named values (one or more); this is used in path parameters, query parameters, form parameters etc.
  • new helidon-common-uri module contains URI abstraction (path with possible parameters, query, and fragment)
  • Header processing now uses HeaderName and HeaderValue types. This allows you to prepare constants with custom names and values that are often reused. It also allows us to improve parsing speed of HTTP requests.

CHANGES

  • Nima: 4748
  • Nima: a few optimizations 4809
  • Nima: Config and name 4802
  • Nima: Use a single SocketHttpClient. 4794
  • Nima: Http exception refactoring 4804
  • Nima: Cleaner stack when running HTTP requests. 4768
  • Nima: Fix query params being lost on upgrade requests. 4796
  • Common: Move DirectHandler to HTTP common and refactor reactive and Nima 4782
  • Common: Updates to Helidon Common, Part 1 4693
  • Common: Updates to Helidon Common, Part 2 4718
  • Config: Unescape the keys when config is returned as a map in Main branch (#4678) 4716
  • Dependencies: Upgrade Postgre driver to 42.4.1 4779
  • Docs: Adopt review comments on doc updates (#4627) 4721
  • Docs: update old K8s deployment yaml (#4760) 4762
  • Examples: Fix intermittent failure - archetype build (FT timeout) 4690
  • MicroProfile: MP path based static content should use index.html (4.x) 4737
  • Build: 4.0 version and poms 4655