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

4.0.8

This release contains important bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.8.

CHANGES

Builders: Generated builders honor service discovery from copied instance 8648
Common: Properly handles an empty input stream in GrowingBufferData 8694
DBClient: Closeable jdbc pool 8571
DBClient: Remove unnecessary comments 8658
Datasource: Addresses a shortcoming of the UCP pool creation logic in certain test scenarios 8642
Health: Preserve stability in details JSON output 8697
OCI: Fixes bug in OkeWorkloadIdentityAdpSupplier.available() method 8689
OCI: Retires dependency of ...cdi.OciExtension on ...runtime.OciExtension 8486
OIDC: double outbound fix 8680
OIDC: original uri resolving query fix 8701
Tracing: Clear default propagator when one is explicitly added 8695
Tracing: Support span event listeners 8619
WebClient: Allows transition from HEADERS to END in HTTP2 client stream 8702
WebClient: Client header duplication fixed 8628
WebClient: WsClient accept Connection header with upgrade value lowercase 8675
WebServer: Add shutdown handler to control shutdown sequence in a deterministic … 8684
WebServer: ErrorHandlers class swallows exception object if response can't be reset 8634
WebServer: Proper handling of invalid Accept types 8669
WebServer: Use delegation instead of inheritance from BufferedOutputStream 8662
Dependencies: Remove dependency on jakarta.activation-api as no longer needed 8650
Dependencies: Upgrade kafka-clients to 3.6.2 8665
Deprecation: Add deprecation to helidon-inject modules in prep for service registry 8678
Docs: Fix wrong description for bean validation annotations (#8505) 8556
Docs: Move example WebClient code into a snippet 8699
Examples: Archetype - Add intellij configuration file for MP projects 8609
Examples: Archetype - Implement MP JSON and metrics combination 8629
Tests: Remove unused private methods from HelloWorldAsyncResponseWithRestRequestTest 8624

4.0.7

This release contains important bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.7.

CHANGES

Builders: Avoid using replicated default values for Lists when creating from builder or instance 8428
CORS: Properly handle opaque origin ("null") in CORS processing 8537
JAX-RS: Fix failure with input stream obtained more than once for post with more than one JAX-RS app 8558
Metrics: Add unwrap support to metrics builders 8588
Observability: Observers now inherit weight of the ObserveFeature. 8554
Security: Disabled OidcFeature no longer throws an NPE. 8520
Security: If there is no configuration of oidc provider, it is considered disabled 8603
Security: Support for disabling security providers through configuration. 8521
TLS: Fixed method that compares SSLParameters for equality 8570
Tracing: Fix baggage propagation from current active span 8512
Tracing: Properly return Optional.empty() for current span if there is no current OTel span 8583
WebServer: Fix static content sending 304 with entity. 8599
WebServer: Make HttpRouting an interface 8523
WebServer: Validate that header has at least one value when list is used. 8489
Build: Add version check to release script 8481
Build: Upgrade upload-artifact to v4 8610
Dependencies: Integrate Helidon Build Tools v4.0.6 8476
Dependencies: Upgrade netty to 4.1.108.Final 8532
Dependencies: Upgrade oci-sdk to 3.39.0 8611
Docs: Add MP observability page; discuss weight setting to resolve some routing conflicts 8580
Docs: Clarify ordinal definition of meta-config 8581
Docs: Fix SE Health endpoint path to match code snippet 8587
Docs: Fix wrong example for Config.onChange (#8607) 8608
Examples: Archetype - Add opens WEB to module info for multipart 8506
Examples: Archetype - Fix Json code duplication 8507
Examples: Archetype - Kubernetes uses ClusterIP instead of NodePort 8488
Examples: Update streaming example so it starts and downloads last uploaded file 8515
Examples: remove netty logging config from logging.properties 8534
Examples: threading example 8576
Tests: Avoid implementing the OCI Monitoring interface. 8474
Tests: Introducing a test to validate that combination of config annotations… 8491
Tests: Upgrade core profile tests to version 10.0.3 8606

4.0.6

This release contains important bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.6.

CHANGES

Builders: Fixes for problems discovered in service registry work 8403
Config: Config encryption improvements 8440
DBClient: Fix for #8344 - Incorrect SQL Type for null Parameters in JDBC Parameter Binding 8342
DataSource: Adds support for injecting UniversalConnectionPool instances 8378
DataSource: Installs a convenient default for connectionPoolName in UCPBackedDataSourceExtension when appropriate 8359
HTTP: Enhance Status.java with Additional Standard HTTP Status Codes 8444
LRA: Replace deprecated classInfo.classAnnotation(DotName) on classInfo.declaredAnnotation(DotName) 8417
Media: Multipart fixes (streaming, consume) 8375
Media: Replace deprecated MediaType.fullType() on MediaType.text() 8340
Metrics: More carefully handle re-creation of global meter registry 8389
Neo4J: Replace deprecated session.writeTransaction on session.executeWrite in Neo4jHealthCheck 8397
OCI: Generalize the creation of the OciMetricsSupport instance from CDI 8431
OIDC: OIDC hostname handling 8456
OIDC: OIDC updates 8387
OIDC: check file system support posix before setting permission 8296
OIDC: refresh token optionality fix 8336
Reactive: Replace deprecated Awaitable.await(long, TimeUnit) on Awaitable.await(Duration) 8334
Tracing: Add baggage API and allow access to baggage via SpanContext (as well as Span) 8320
Tracing: Suppress Helidon handling of OpenTelemetry annotations if OTel Java agent is present 8360
Tracing: Use OTel AgentDetector instead of just system property - review comments from earlier PR 8374
WebServer: Adds support for sending websocket CLOSE frames without a payload 8408
WebServer: Fix buffering of content in our Jersey integration. 8461
WebServer: Include requested URI config in ListenerConfig; fix config keys 8371
WebServer: Releasing entity count down latch even if connection is set to close. 8376
WebServer: Return 500 when 204 with entity is sent from routing. 8357
WebServer: TLS Revocation config 8425
WebServer: TLS peer certs performance 8316
Build: Upgrade GitHub actions 8442
Dependencies: Bump com.oracle.oci.sdk:oci-java-sdk-bom from 3.34.0 to 3.35.0 in /dependencies 8421
Dependencies: PostgreSQL JDBC driver updated to 42.7.2. 8413
Dependencies: Upgrades Oracle database libraries to version 21.9.0.0. Adds tests under datasource-ucp CDI integration. 8221
Docs: Externalize and compile documentation java snippets 8294
Docs: Replace deprecated session.readTransaction on session.executeRead 8420
Docs: Update context-root config documentation 8427
Docs: Update javadocs of Meter builders to cross reference MeterRegistry.getOrCreate() 8381
Docs: doc examples snippets cleanup 8439
Examples: Align README.md vs functionality 8380
Examples: Archetype - Fix sql script for oracle database 8426
Examples: Fix WebServer Mutual TLS example 8409
Examples: archetype cleanup 8445
Examples: examples cleanup 8433
Examples: generate a .gitignore files from archetype 8401
Tests: Also catch UncheckedIOException in test to handle broken pipes 8462
Tests: Fix OTel agent detector test that was polluting the JVM for later tests 8449
Tests: Improve examples test coverage 8338
Tests: Make test execution conditional to IPv6 being configured for localhost 8388
Tests: Replace deprecated API for configuring ObjectMapper 8395
Tests: Replace deprecated Multi.from(Stream) on Multi.create(Stream) 8424
Tests: Replace deprecated OutputStreamMultiBuilder.timeout(long,TimeUnit) on OutputStreamMultiBuilder.timeout(Duration) 8404
Tests: Replace deprecated java.util.Locale constructors on factory methods 8355
Tests: Restfull tck 3.1.5 8368
Tests: Updates test to handle IOException if connection was closed 8457

4.0.5

This release contains important bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.5.

CHANGES

Builders: Use vararg instead of optional (as a name). 8301
HTTP: Fixes a few problems handling character encodings in URIs 8327
Metrics: Remove clear-out of registries from extension; do it in TCK-only shutdown observer; update doc 8292
Security: OIDC improvement 8323
Tracing: Add null check for resource path in filter 8312
Tracing: Fix unwrap methods to return cast delegates rather than cast 'this' 8298
Tracing: Set incoming baggage from parent on Span 8303
Dependencies: Upgrade OCI SDK to 3.31.1 8304
Test: Fix KafkaSeTest on Windows 8322
Test: Fix CachedHandlerTest.testFsFromInMemory on Windows 8318

This release contains bugfixes and ehancements and is recommended for all users of Helidon 4. In particular this release contains a fix for issue 8250 which can occur when running previous releases of Helidon 4 on Java 21.0.2 or newer.

Java 21 is required to use Helidon 4.0.4.

CHANGES

JPA: Ensures that the enabled flag is honored in JpaExtension's observer methods 8235
Media: JSON unicode detection without UTF-32 workaround 8253
RestClient: TLS replace in HelidonConnector fix 8247
Security: Authorized set to false fix 8295
Security: Security propagation is now disabled with not configured 8239
Tracing: Guard against NPE during early invocation of Span.current() 8257
Tracing: Slight clean-up of recent baggage and span scope fix 8258
WebClient: Cleans up and simplifies logic to determine which type of IP addresses to consider 8280
WebClient: Http client protocol creation not honoring disabled service discovery 8284
WebClient: Set weight for WebClientTracing provider greater than that for WebClientSecurity provider 8274
WebServer: Fix for buffer data when created with an offset. 8251
WebServer: Some minor optimizations in WebServer 8242
Build: Change backport action to accept target versions for porting via checkboxes and select current issue's version from a list 8236
Dependencies: Upgrade Yasson to 3.0.3 8272
Dependencies: Upgrading to latest Tyrus 2.1.5 8278
Docs: broken link fix 8259
Docs: change WebServer.Builder to WebServerConfig.Builder. 8261
Docs: fix broken documentation links Part 2 8300
Examples: Remove unnecessary GreetingProvider from example custom liveness health check 8184
Tests: Add back span name test containing an explicit Application bean 8238
Tests: Fix vault tests 8279

4.0.3

This release contains bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.3.

CHANGES

Builders: Support for Map<String, String> in configured builders. 8231
CORS: Add a little logic to CORS config processing and significantly update the CORS doc 8212
CORS: Include scheme and port of origin and host in deciding whether to classify a request as CORS or not 8166
Metrics: Allow programmatic look-up of MetricRegistry via CDI without NPE 8210
Metrics: Make RegistryFactory and its getInstance and getRegistry methods public 8175
OCI: Fix issue for checking if app is running in an OCI instance which causes Instance Principal auth to fail 8197
RestClient: Prevent Helidon connector from re-encoding URI 8232
Security: Fixed IDCS role obtaining 8207
Security: OIDC id token validation and token refresh 8153
Security: TLS default config values 8206
Tracing: Add support for @SpanAttribute annotation, use entire path for REST resource span name 8216
Tracing: Manage scopes correctly with baggage; allow baggage to be mutable to honor the Helidon Span#baggage semantics 8225
WebClient: The Helidon WS client must include a Connection header 8198
WebClient: WebClientService duplication fix 8224
WebServer: Check result of Integer.parseUnsignedInt() to be non-negative 8215
Dependencies: Jersey 3.1.5 8174
Dependencies: upgrade jsonp 2.1.3 8202
Docs: Fix bad include in cors documentation 8220
Docs: Fix image sizing in SE tracing guide 8201
Docs: Realign SE tracing guide to code 8193
Docs: fix broken documentation links Part 1 8219
Examples: Remove references to any JDK from examples 8213

4.0.2

This release contains bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.2.

CHANGES

Builders: required fixes to builders and other tooling 8076
Metrics: Fix premature access to RegistryFactory 8118
Metrics: jvm uptime units 8065
Native image: key-utils are missing native image prop 8146
Scheduling: 8059 Delayed fixed rate scheduling 8075
Tracing: Add proper handling of content-read and content-write logs within HTTP Request tracing span 8105
Tracing: MP OpenTelemetry and Helidon Tracing API 8073
Tracing: Several fixes to tracing config 8155
WebClient: #8077 Client keep alive fix 8101
WebServer: Update server's internal state if a listener fails to start 8111
WebSocket: Handle WebSocket frames of longer payload 8134
WebSocket: Make sure a WsListener supplier is called exactly once per connection 8116
Build: Aggregated javadoc and docs URLs updates 8171
Build: Incorporate release branch name in artifact bundle name 8081
Dependencies: 4.x: Upgrade grpc to 1.60.0 8098
Dependencies: Upgrade slf4j to 2.0.9 and logback to 1.4.14 8120
Docs: Change doc in the wake of OpenAPI UI service reorg in 4.0 to add the services level to the config structure 8100
Docs: Fix health and metrics URLs. Mention health returns 204 8160
Docs: Remove doc for tags on content-read and content-write spans; the tags are no longer added by the code in 4.x 8112
Docs: Significant changes and corrections to the SE health doc 8125
Docs: tuning guide update 8140
Examples: Add missing metrics to Pokemons example 8129
Examples: Correct typo in MP health example 8131
Examples: Fix Mongo Dbclient + related example 8130
Examples: Fix and add test to database SE example 8097
Tests: Add @RequestScoped support for testing 7916
Tests: Add Hierarchy tests to MP Telemetry 8089
Tests: Avoid possible test ordering problem 8145
Tests: Disable failing testNonTransactionalEntityManager JPA test. 8124
Tests: Enable disabled TCKs 7781

4.0.1

This release contains bugfixes and ehancements and is recommended for all users of Helidon 4.

Java 21 is required to use Helidon 4.0.1.

Notable Changes

Added PROXY protocol support to Helidon WebServer
WebServer performance improvements
CorsConfig.Builder.enabled() now returns an Optional<Boolean> instead of boolean. This change was required to fix a CORS issue and we expect the user impact of this change to be minimal.

CHANGES

CORS: Change CorsConfig.enabled to optional and add logic to infer it 8038
Health: Add a new addCheck variant allowing the caller to set the health check name; add tests; revise doc 7994
Health: Fix nested config prefix for observer settings 8010
Http2: Graceful client connection close 8051
JPA: Adds a DialectFactory implementation to permit Hibernate to introspect database metadata properly when supporting container-mode JPA 7927
Metrics: Add meter type to JSON metrics metadata output 8057
Metrics: EOF at end of OpenMetrics output 7982
Metrics: Use correct config nodes for metrics settings; when using global meter registry set metrics config correctly 8008
MicroProfile: Update JaxRsService to reset status to 200 when nexting. 8056
OCI: Adds support for Provider-specializing injection points in OciExtension 8006
OpenAPI: Correct errors in how OpenAPI generator config settings are set 7970
WebServer: Fix for access-log feature. 8041
WebServer: GZIP encoder - properly trigger chunked enc 7977
WebServer: Headers on server cannot be set after entity was sent 8042
WebServer: Initial support for proxy protocol V1 and V2 7829
WebServer: Optimize single provider case 8002
WebServer: Re-enable TCP auto-tuning 7989
WebServer: Updates header type hierarchy to make HeaderValueCached not writeable 8000
WebServer: WS disconnect 7890
WebSocket: Support for longer WebSocket frames 8025
gRPC: Fix repeated pseudo-header field :status 7995
native-image: JSON-P native image 8044
Dependencies: Align Websocket API versions with 3.x 7950
Dependencies: Upgrade log4j to 2.21.1 . Use log4j-bom 7900
Dependencies: Upgrade parsson to 1.1.5 7958
Dependencies: Upgrade to mysql-connector-j 8.2.0 7988
Dependencies: Upgrades to Tyrus 2.1.4. 7929
Docs: Adds Testing section back to the menu and fix maven coordinates 7992
Docs: Change "Java for cloud" to "Helidon" 8046
Docs: Fix broken link and explicitly state MP uses Helidon WebServer 8043
Docs: Fix telemetry docs 8014
Docs: Fix tracing documentation 7962
Docs: Minor fixes in SE Tracing documentation 7887
Docs: New section describing support for the Proxy Protocol 8007
Docs: SSE doc maven coordinates 7891
Docs: Update Neo4j module to generated config 7997
Docs: Upgrade gradle guide and examples 7910
Docs: WebServer fix req.next typo 8053
Docs: fix Security http basic authentication property 7987
Examples: Archetype - Fix the wrong metrics endpoint for Helidon SE 8020
Examples: Archetype - Generated projects does not contains empty application.yaml 7942
Examples: Corrects a case typo in the custom MP archetype that results in an invalid property being installed on UCP 7924
Examples: Use H2 in-memory in SE archetype 7877
Examples: Use MP OpenTelemetry instead of OpenTracing in archetypes 7993
Examples: archetype fix MP security 7947
Examples: backport native-image fixes + support -Dnative.image.skip and -Dnative.image.buildStatic 7972
Examples: dockerFiles in examples 7909
Tests: Enable tests that were disabled during renaming to jakarta packages work 7949

Thanks to @lilac for their contributions.

4.0.0

We are pleased to announce the release of Helidon 4.0.0. The big news in Helidon 4.0.0 is the introduction of Helidon Níma -- a ground up webserver implementation based on JDK Project Loom virtual threads. With Helidon 4 you get the high throughput of a reactive server with the simplicity of thread-per-request style programming.

The Helidon SE API in 4.0.0 has changed significantly from Helidon 3. The use of virtual threads have enabled these APIs to change from asynchronous to blocking. This results in much simpler code that is easier to write, maintain, debug and understand. Existing Helidon SE code will require modification to run on these new APIs. For more information see the Helidon SE Upgrade Guide.

Helidon 4 supports MicroProfile 6. This means your existing Helidon MP 3.x applications will run on Helidon 4 with only minor modifications. And since Helidon’s MicroProfile server is based on the new Níma WebServer you get all the benefits of running on virtual threads. For more information see the Helidon MP Upgrade Guide.

New to Helidon? Then jump in and get started.

Java 21 is required to use Helidon 4.0.0.

CHANGES

DBClient: Fix DbClient JSON mapping 7844
DBClient: UriQueryEmpty + NoSuchElementException 7869
Http: Remove commented-out code 7868
Metrics: Restore percentile and bucket data to JSON metrics output 7849
Build: remove Jenkinsfile 7839
Dependencies: Update build-tools to 4.0.0 7872
Dependencies: Upgrade kafka-clients to 3.6.0 7833
Docs: AOT update, remove aot site, update guides for native image 7859
Docs: Config documentation update 7814
Docs: Final updates intros 7864
Docs: Health doc updates 7828
Docs: JWT Auth configuration properties updated 7816
Docs: Messaging doc update 7837
Docs: Metrics doc update 7851
Docs: Migration guides 7715
Docs: Observability endpoints documentation 7768
Docs: Refreshes persistence.adoc for Helidon 4.x 7834
Docs: Tracing documentation 7813
Docs: Update dbclient docs 7874
Docs: Update Helidon Webclient Guide documentation 7847
Docs: Update to WebServer documentation for Helidon 4 7817
Docs: Update to gRPC documentation for Helidon 4 7809
Docs: Update webclient documentation 7812
Docs: Updated OpenAPI and OpenAPI UI doc for 4.0 7823
Docs: Updates for MP upgrade guide 7863
Docs: fix github links, microprofile version, SE upgrade guide 7871
Docs: json metadata fix 7858
Docs: webclient doc part2 4.x 7845
Examples: Archetype fix application yaml test and some unused import 7860
Examples: Fix Archetype native-image.properties path 7846
Examples: Fix MP quickstart native image build 7826
Examples: Fix java.lang.ClassNotFoundException: io.helidon.logging.jul.HelidonConsoleHandler7866
Examples: Update archetypes and dbclient examples 7873
Tests: Removes two disabled tests in tests/integration/security/path-params per direction 7832

4.0.0-RC2

This is the second RC 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.

The big news in Helidon 4.0.0 is the introduction of Helidon Níma -- a ground up webserver implementation based on JDK Project Loom virtual threads. With Helidon 4 you get the high throughput of a reactive server with the simplicity of thread-per-request style programming.

Java 21 is required to use Helidon 4.0.0-RC2.

CHANGES

Config: Replace usage of Priority with Weight in helidon-config 7776
JPA: Fixes a jar-only URL resolution bug 7748
JPA: Remove exclusion of jandex dependency now that hibernate has been upgraded 7778
JPA: Switches default JPA CDI portable extension to PersistenceExtension from JpaExtension 7719
Logging: Fix SLF4J binding for annotation processors 7706
Metrics: Reinstate exemplar support 7760
Native-image: Adjusts paths to native-image.properties files in two projects to conform to the native-maven-plugin requirements as reported by the plugin 7746
Native-image: Native image update 7711
OpenAPI: Add openapi-ui submodule directory to the integrations module list 7766
OpenAPI: Renamed openapi/openapi-ui back to integrations/openapi-ui 7761
Remove preview from features that are now considered production 7688
TLS: Partial fix for issue #7698 - TlsManager support for client-side 7699
Tracing: Decrease DEFAULT_SCHEDULE_DELAY time for JaegerTracerBuilder 7726
Tracing: Migrate opentracing to Helidon Tracing 7708
WebServer: Empty path 7770
WebServer: Fix small mistakes 7757
WebServer: HTTP2 concurrent streams check 7697
WebServer: Move SSL handshake logic from listener thread to connection thread 7764
WebServer: Update HttpRules API to not have varargs with generics 7687
WebServer: named routing 7705
WebServer: Server Features 7777
Build: Fix build noise 7740
Build: Java 21 follow up 7732
Build: release updates 7682
Dependencies: Upgrade ASM version used by plugins to 9.5 7677
Dependencies: Upgrade Weld and ClassFileWriter 7720
Dependencies: Upgrade okhttp3. Use OCI SDK BOM 7712
Dependencies: Upgrade parsson to 1.1.3 7691
Dependencies: Upgrade to Microstream 08.01.01-MS-GA and other minor things 7752
Dependencies: Upgrades Hibernate to version 6.3.1.Final 7742
Dependencies: Upgrades ojdbc8 to 21.4.0.0 and fixes JAXP parser conflict 7762
Deprecations: Remove older deprecated methods and types. 7728
Docs: Add Helidon Connector to sitegen.yaml 7767
Docs: global config 7681
Docs: Fix occurences of reactive in the docs 7684
Docs: Fixes user-reported typo in persistence guide 7750
Docs: Initial documentation for the new Helidon connector. 7641
Docs: Makes it more clear in documentation that persistence.xml files are application-level concerns, not component-level concerns 7771
Docs: Reactive streams doc alignment #6458 7723
Docs: Update maven, gradle, jlink, native-image guides 7704
Docs: updates to the general doc 7673
Examples: Fix several issue in archetype and add native-image.properties to generated projects 7731
Examples: Remove unnecessary metrics dependencies MP quickstart archetype 7710
Examples: Update quickstart examples to use microprofile-core bundle 7772
Examples: Verify Starter with 4.x archetypes 7775
Tests: Move webserver/benchmark/jmh to tests/benchmark/jmh 7690
Tests: Temporarily disable unit test in example due to intermittent pipeline failures 7765

4.0.0-RC1

This is the first RC 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.

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. With Helidon 4 you get the high throughput of a reactive server with the simplicity of thread-per-request style programming.

Java 21 is required to use Helidon 4.0.0-RC1.

Notable Changes

Major refactoring of APIs is complete.
HTTP/2 support complete and other WebServer and WebClient features complete.

CHANGES

CORS: Use requested URI info in CORS decision-making 7585
Config: Deprecate support for etcd v2 7623
DBClient: Fixed DbClient H2 tests. 7639
Inject: Mark inject processor as preview (warning when executed). 7590
Integrations: Removes Jedis integration to reduce technical debt 7654
JPA: Adds zero-argument non-private constructors to NonTransactionalEntityManager and ExtendedEntityManager 7561
Metrics: Make SE metrics default scope application instead of nothing 7666
Metrics: Metrics followup 7547
OCI: Adjusts CDI OciExtension to use runtime OciExtension for certain authentication tasks 7373
OCI: Introduces OciSecretsMpMetaConfigProvider, which adapts OciSecretsConfigSourceProvider to the MpMetaConfigProvider contract 7520
OCI: OciExtension refinements 7563
Observability: metrics and openapi endpoints should be authorized by default 7572
Observability: update APIs 7625
OpenAPI: OpenAPI updates 7669
RestClient: Modifies Helidon Connector to use WebClient and also support HTTP/2 7582
Security: TargetKeys Map changed to ConcurrentHashMap 7603
Tracing: Move Opentracing to Helidon Tracing API 7678
WebClient: HTTP/2 Client 100 continue 7604
WebClient: HTTP/2.0 Client trailers support #6544 7516
WebClient: Remove prefetch #7663 7676
WebClient: double-slash URI issue #7474 7657
WebClient: Http2 OutputStream redirect support 7637
WebServer: HTTP/2 server 100-continue 7633
WebServer: Introducing request and response stream filters to server. 7608
WebServer: Refactor Http class 7570
WebServer: Server side trailers #7647 7649
Build: Checkstyle suppression in code 7588
Build: Update workflows to Oracle JDK 21 LTS 7653
Build: release workflow 7569
Dependencies: Updates version of Micronaut libraries 7553
Dependencies: Upgrade Neo4j to v.5 7636
Dependencies: Upgrade io.dropwizard.metrics:metrics-core to 4.1.36 7624
Dependencies: Upgrade jboss logging to 3.5.3.Final 7595
Dependencies: Upgrade jgit to 6.7.0 7586
Dependencies: Upgrade mongodb driver to 4.10.2 7651
Dependencies: Upgrade zipkin-sender-urlconnection to 2.16.4 7621
Dependencies: Upgrades Narayana to version 7.0.0.Final 7662
Docs: 4x overview and general intro doc updates 7571
Docs: Config metadata docs 7581
Docs: SE Diffs 3.x to Main .adoc 7515
Examples: Move archetype metrics under GreetService 7612
Examples: Refactor archetype metrics 7556
Examples: Update examples to use Config.global(config) 7655
Examples: demonstrate proper use of GlobalConfig in archetypes 7664
Examples: fix archetypes code formatting 7670
Tests: Allowed cipher suite test added 7587
Tests: Fix MutualTlsTest and related issues 7622
Tests: Intermittent OciCertificatesTlsManagerTest fix 7607
Tests: MP testing refactoring 7548
Tests: Re-enables microprofile/server/ServerSseTest.java 7626
Tests: Restore test of model reader and filter 7579

4.0.0-M2

This is the second Milestone 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.

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. With Helidon 4 you get the high throughput of a reactive server with the simplicity of thread-per-request style programming.

Java 21 is required to use Helidon 4.0.0-M2.

Any easy way to get started with Helidon 4.0.0-M2 is using the helidon CLI

helidon init --version 4.0.0-M2

Notable Changes

Java 21 is required for 4.0.0-M2
Finish integration of Níma WebServer into Helidon 4. This means that the nima Java package has been assimilated into the base Helidon packages.
Numerous enhancements to WebServer and WebClient to achieve feature parity with Helidon 3

The above is work-in-progress. There are still some gaps, and APIs are subject to change.

CHANGES

WebSocket: Added support for WS endpoints in application scope 7340
WebServer: Support Http.Header.X_HELIDON_CN 7345
WebServer: Resource limits 7302
WebServer: Media Context and streaming 7396
WebServer: Http2Connection should ignore a max concurrent streams setting of zero from the client 7346
WebServer: Additional HTTP status codes. 7408
WebServer: Add configuration support for EXECUTOR_SHUTDOWN_MILLIS 6955
WebClient: include proxy setting for relative uris 4.x 7425
WebClient: Webclient redesign 7255
WebClient: WebClient Follow Up 7341
WebClient: Support for proxy config properties in client and request 7190
WebClient: Output stream redirect support 7366
WebClient: HTTP Proxy TODOs 7287
WebClient: Fixed ClientUri to extract query params when created from a URI 7297
WebClient: Create a different config setting for inbound and outbound HTTP1 header 7362
WebClient: ConcurrentModificationException in Http2ClientConnection.writeWindowsUpdate 7395
WebClient: Change default to SYSTEM proxy in WebClient 7292
WebClient: Cached connection close detection 7398
WebClient: 7301 WebClient - Local connection cache switch 7353
Uplevel Nima 7361
Tracing: Refactor to Tracing providers 7264
Serialization: Make sure JEP-290 is enforced in Níma 7334
Security: Unified constants for configuring outbound id and secret. 7415
Security: Tenant now uses WebClientSecurity module 7394
Security: Make check for audience claim in access token optional in OIDC provider 6959
OCI: Global Config Source 7352
OCI: Follow-up items for OCI Global Config 7387
OCI: Enables OIDC integration tests and fixes a couple of problems in WebClient 7390
OCI: Adds OciSecretsConfigSourceProvider.java 7391
Media: Header and Media type API consistency 7351
Inject: LoomServer parallel listener start 7200
Inject: Interceptor creator now uses TypeName (and related changes) 7420
gRPC: Support creating routes from standard gRPC bindable services 7384
gRPC: Fix gRPC to calculate the correct class name for method request and response types 7228
DBClient: Issue #7187 - Blocking DBClient Part 2 7231
DBClient: #7230 - JDBC type specific setters based on EclipseLink 7246
Config: Use common config 7336
Common: Using SE flavor instead of Nima 7338
Common: Remove public constructors from production types. 7335
Common: Remove non-virtual executor support 7324
Common: Remove VirtualExecutorUtil.java 7263
Common: Encode all characters that should be encoded in URI, including % itself. 7314
Builders: Support Supplier in builder setters for types that have a builder. 7284
Builders: Supplier in builder 7402
Builders: Provider support in builders 7365
Builders: Prototype builder update 7281
Builders: Fix references to interceptor. Now using decorator for builders. 7405
Builders: Class model and builder generation reworked 7256
Builders: Allowed values are now checked when validating a builder. 7400
Tests: TCK Tracking: Jakarta EE 10 Core Profile #6799 6885
Tests: Make OciMetricsDataTest.beforeEach public 7333
Tests: Fix tests disabled during WebClient redesign #7286 7299
Tests: Fix intermittently failing test. 7379
Test: Helidon Arquillian module should only depend on MP core 7440
Examples: Enable disabled pokemon jpa/hibernate example test 7436
Examples: Archetype: remove unused file 7253
Examples: Archetype: Feature parity with 3.x + renaming from nima to se 7409
Examples: Archetype : generate module-info file 7232
Examples: Add app.yaml to quickstart 7217
Docs: javadocs: update external cross reference links and offline package-lists 7401
Docs: Update prereqs in Helidon Injection README 7326
Docs: Update development guidelines to include naming rules for builder types. 7148
Docs: PR replaces previous Nima removal PR 7347
Docs: Fix openapi links 7431
Docs: Add white paper to README.MD 7378
Dependencies: upgrade microprofile-openapi-api to 3.1.1 and add direct dependency 7453
Dependencies: Upgrade to OCI SDK 3.12.1 (#7163) 7211
Dependencies: Upgrade okio and oci-sdk 7262
Dependencies: Upgrade microprofile-health to 4.0.1 and microprofile-lra-api to 2.0 7454
Dependencies: Upgrade microprofile config to 3.0.3 7434
Dependencies: Upgrade grpc-java to 1.57.1 and remove repackaging of io.grpc 7304
Dependencies: Upgrade eclipselink to 4.0.2 7435
Dependencies: Upgrade Jersey to 3.1.3 7258
Dependencies: JMS bumpup 3.0 -> 3.1 7380
Dependencies: Force upgrade of bytebuddy to 1.14.6 to support Java 21. 7438
Build: remove license headers in archetype generated files 7236
Build: Use Helidon copyright module for generated code 7192
Build: Java 21 7222
Build: Integrate build tools 4.0.0-M1 7330
Build: Address maven 3.9.2 plugin issues 7214
Build: Add -proc:full to javac to explicitly enable annotation processing 7452

4.0.0-M1

This is the first Milestone 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.

Java 20 is required to use Heldon 4.0.0-M1.

Any easy way to get started with Helidon 4.0.0-M1 is using the helidon CLI

helidon init --version 4.0.0-M1

Notable Changes

Removed the Helidon Reactive WebServer and WebClient that were based on Netty as we fully commit to new implementations based on virtual threads that have a blocking style API (Project Níma).
Converted other modules with reactive APIs to blocking style APIs. The io.helidon.common.reactive APIs will stay as general purpose reactive utilities and operators
Introduced Helidon Injection, a deterministic, source-code-first, compile time injection framework
Upgraded MicroProfile support to MicroProfile 6 and Jakarta 10 Core Profile running on the Níma WebServer
Started adoption of Helidon Builders, a builder code generation framework

The above is work-in-progress. There are still missing features, and APIs are undergoing change. For example the Grpc implementation is limited and MicroProfile Grpc support is temporarily absent.

CHANGES

Config: Config with injection 7080
Config: Generate config metadata fix. 7145
GraphQL: Update GraphQLServiceTest to use @ServerTest and Http1Client 6795
Grpc: Support for grpc proto packages. 7158
Inject: All Pico services should default to a lesser than DEFAULT_WEIGHT 6590
Inject: Allow empty list injection 7160
Inject: Annotation for Named that accepts a class 6779
Inject: Attempt to do type regeneration turned into an error condition instead of being logged 7155
Inject: Constructors are now intercepted with appropriate interceptors only. 6648
Inject: Custom Annotation Processor Refinements 6883
Inject: Fix pico lookup method returning from generic criteria 6582
Inject: Fixes incremental compilation for Pico services and running unit tests from IDE 6863
Inject: Inheritance in DefaulQualifierAndValue 6639
Inject: Interceptor Redo 6658
Inject: Issue 6634 fix - interceptor args 6640
Inject: Pico ConfiguredBy services with abstract base 6589
Inject: Pico anno processor rewrite 6705
Inject: Pico interceptor arguments are now correctly handled. 6642
Inject: Preparation for Pico Extensibility Enhancements 6936
Inject: Rename Pico -> Inject / Injection 7174 6682
Inject: TypeInfo and TypedElementName API name tuning 6841
Inject: module-info parsing 7156
LRA: Fix LRA Logging 6734
LRA: LRA coordinator docker fix 6727
LRA: expunge reactive webclient 7112
MP Config: convertToHelidon exception fix 6834
MP Metrics: MP Metrics 5.0 support for 4.x 7139
MP RestClient: Helidon connector configuration and redirects 7169
MP RestClient: Initial implementation of Helidon connector for Jakarta REST client 7039
MP Server: Support for injection of ServerRequest and ServerResponse also via CDI 6784
MP Server: Helidon main class 7136
MP Telemetry: MicroProfile Telemetry Support 6493
MP Telemetry: cleanup dependencies 6815
Media: Fix TODO to handle close call on entity 6501
Media: Move SnakeYAML log suppression to slightly earlier in the code path 6661
Messaging: WLS JMS connector doesn't support named factory bean 6923
Metrics: Convert PrometheusSupport from a reactive WebServer Service to a HelidonFeatureSupport 6837
Metrics: Fix path handling for metrics observe provider 7178
Metrics: MicroMeter contains Nima and SE integration 7090
Neo4j: Alternative implementation of Neo4jHealthCheck based on io.helidon.heath.HealthCheck 6850
Neo4j: Nima support 6909
OCI: Pico extensibility support for the OCI SDK 6982
OpenAPI 3.1 support for 4.x 6954
OpenAPI: OpenApiFeature instead of SeOpenApiFeature 7103
Reactive removal: Module helidon-reactive-webclient-jaxrs is no longer needed 6816
Reactive removal: Remove grpc and MP grpc based on Netty grpc from Helidon 7069
Reactive removal: common/rest and vault 7033
Reactive removal: Remove reactive module and netty and any additional cleanup 7165
Security: rework to synchronous 6230
Telemetry: Remove Microprofile dependencies from SE Telemetry 6998
Tracing: Add Baggage to Helidon Span 6581
Tracing: Support for different propagators for Jaeger OpenTelemetry integration. 6586
WebClient: Add header and config builder method to webclient builder 7056
WebClient: Add relativeUris configuration to determine if relative or absolute URI will be used in the request 6952
WebClient: Add static factory methods to Http1Client 7119
WebClient: Additional methods for Http1ClientRequest 6983
WebClient: Keep alive is now configurable per request 7122
WebClient: Shortcuts for media support 6951
WebClient: Skip uri encoding feature 6910
WebClient: Support for lastEndpointUri() in Webclient responses 7113
WebClient: Use current context instead of creating new one in ClientRequest 7014
WebClient: Validate http request and response headers when using the webclient 6515
WebClient: WebClient Proxy Support 6441
WebClient: configuration for timeouts and keepAlive 6971
WebClient: read timeout per request 7135
WebClient: redirect support 6929
WebClient: security propagation module 7109
WebClient: services for Níma client (HTTP/1 only for now). 6752
WebClient: should have a mode that is resilient to bad media/content types 6999
WebClient: support for properties 7028
WebServer: Avoid reflecting back user data in exception messages 6990
WebServer: Convenient method status(int) in ServerResponse. 6833
WebServer: HTTP/2 header continuation 6907
WebServer: Rename ServerConfig to WebServerConfig 7108
WebServer: Set running flag to false in shutdownhook 6428
WebServer: TLS reloading fixed 7140
WebServer: Writing to closed socket with a silent error 6887
Builders: updates 6710
Builders: builder toString method update 7142
Builders: support lowercase for modifiers names 6844
Builders: ConfigBean not resolving config correctly 6652
Builders: Default prefixed builder types renamed to be suffixed 6796
Builders: Document assumptions about types of current processing round 7072
Builders: Fix error messages in validation task of builder processor. 7070
Builders: Follow up changes for builders PR 7074
Builders: GeneratedConfigBean should be easily available from Config-driven-services 6680
Builders: New config builders 7008
Builders: Optional Builder methods should default to package private 6593
Builders: Pico cfg driven with additional ctor injection points fix 6612
Builders: TypeInfo and Builder Refinements 6729
Build: Change provided and optional to just optional - iteration 1 (#6495) 6503
Build: Change provided and optional to just optional - iteration 2 (#6495) 6650
Build: Fixed parallel build. 7111
Build: Switch metrics API jar scope to compile from provided 6677
Dependencies: Kafka bump up 2.8.1 > 3.4.0 6708
Dependencies: Update grpc-java to version 1.54.1 6693
Dependencies: Upgrade Jakarta Annotations to 2.1.1 6595
Dependencies: Upgrade Jakarta EL to 5.0.1 6603
Dependencies: Upgrade Jakarta jsonb to 3.0.0 and jsonp to 2.1.1 6602
Dependencies: Upgrade graphql-java to 18.x 6965
Dependencies: Upgrade jersey to 3.1.2 7147
Dependencies: Upgrade to WebSocket 2.1 API 6617
Dependencies: Upgrades JPA to 3.1 6684
Dependencies: dependency upgrades: grpc, guava, jackson, netty 7162
Docs: MP Telemetry Documentation 6772
Docs: Some minor tweaks to the REST documentation 6686
Docs: Update documentation of composite provider flag. 6597
Docs: improve pico integration docs for oci sdk 7040
Docs: fix links for openapi in 4x 6688
Docs: New document describing the client and server WebSocket APIs in Nima 6578
Examples: Add metrics to quickstarts 7114
Examples: Creates a clean set of Pico examples 6800
Examples: Create file validations 6608
Examples: Fix Helidon Archetype generates broken projects 6722
Examples: Fix archetype build 7177
Examples: Fix params of @ExampleObject annotations in examples (#6791) 6792
Examples: Fix post merge compile error in examples.micrometer.se.MainTest 7115
Examples: MP Telemetry examples 6813
Examples: Nima custom archetype 6327
Examples: OCI examples remove reactive API 6969
Examples: Pico example pre req changes 6801
Examples: Port of static content example to Nima webserver 6778
Examples: Porting of example to Nima and removal of reactive dependencies 6839
Examples: Refactor examples/nima/media into examples/media/multipart 6812
Examples: Relocate Pico Examples 6783
Examples: Removed examples/webserver/jersey 6877
Examples: SE/Reactive archetype removal 6671
Examples: Temporarily remove examples generated by OpenAPITools 6667
Examples: Update examples/graphql/basics to use Nima 6854
Examples: Update examples/logging to use Nima 6865 6862 6861
Examples: Update examples/logging/logback-aot to use Nima 6866
Examples: Updates to (standalone) Quickstart SE to use Nima and @ServerTest 6770
Examples: Updates to Quickstart SE to use Nima and @ServerTest 6766
Examples: archetypes generating poorly formatted code 6622
Test: Add @target(ElementType.METHOD) for annotation @mptest 6489
Test: Use Hamcrest assertions instead of JUnit in tests/integration/jms (#1749) 6643
Test: 7097 flaky HTTP/2 bookstore test 7137
Test: Add enum related config bean tests 6592
Test: Convenient flushing on response commit 6673
Test: Disable intermittently-failing async metrics MP test until we understand the failure 6980
Test: Port of tests/functional/config-profiles over to Nima 6826
Test: Re-enables ServerTest.java in nima/openapi 6585
Test: Reenables JerseyPropertiesTest.java in microprofile/server 6594
Test: Removed old bookstore-se app and renamed bookstore-nima to bookstore-se 6790
Test: Removed tests/integration/native-image/se-1 6882
Test: Update MessagingHealthTest to use Nima WebClient instead of Reactive WebClient 6814

4.0.0-ALPHA6

This is the sixth 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 backward incompatible API changes.

Java 20 or newer is required to use Heldon 4.0.0-ALPHA6.

CHANGES

Common: Use helidon-common-config where possible/applicable 6448
Config: Escape the key when copying a config node 6296
Logging: Logging properties file clean up 6367
Logging: Remove FileHandler from logging.properties 6364
Messaging: 6303 JMS JNDI destination support 6305
Pico: Builder define default methods 6294
Pico: Pico and Builder Exception conventions 6525
Pico: no arg constructor support on pico interceptors 6552
Pico: pico runtime services 5750
Pico: renaming pico module names and api package names 6573
WebClient: Complete shortcut methods for all HTTP methods for the WebClient 6358
WebClient: Forward port of DNS resolver for Webclient 6551
WebClient: HTTP/2 Client with flow-control 6399
WebClient: Improve ClientRequestImpl 6208
WebServer: Add requested URI discovery support 6030
WebServer: Added shortcut methods for registering MediaSupport 6564
WebServer: Capture and propagate the CCL in ThreadPerTaskExecutor 6322
WebServer: Complete Webserver HTTP routing shortcut methods 6404
WebServer: Do not split headers and payload into two different buffers 6491
WebServer: Error handling removed from the filter chain 6415
WebServer: Fix artifact ID, typo in name 6494
WebServer: Handle zero or more spaces after commas when parsing Accept-Encoding 6380
WebServer: Issue 5383: Added Content-Encoding header check when content encoding is disabled. 6267
WebServer: Issue 6278: Programmatically control media providers with Nima WebServer 6412
WebServer: Jackson media support for Níma 6432
WebServer: Make size of header buffer independent of payload size 6475
WebServer: Nima media support 6507
WebServer: SSE API and implementation in Nima 6096
WebServer: Wrap underlying output stream with a buffered one whose buffer size is configurable 6509
WebSocket: Renamed receive() method to onMessage() in WsListener 6571
Build: Upgrade Java to 20 GA 6474
Dependencies: Adopt SnakeYAML 2.0; add integration tests for reactive and Nima 6535
Dependencies: JWT-Auth upgrade to 2.1 version 6268
Dependencies: Upgrade graphql-java to 17.5 6540
Docs: Add new dirs and docs for Nima 4 6398
Docs: Created Nima dir for docs 6306
Docs: New documenation for FT in Nima 6565
Docs: New document that describes Nima's SSE APIs 6332
Docs: Remove claim that metrics are propagated from server to client 6361
Examples: Add OCI MP Archetype (4.x) 6147
Examples: Update mustache format in archetype files 6286
Tests: Fix RC in JMS error test 6375
Tests: JMS intermittent test fix 6392
Tests: Re-enable tests 6359 6355 6356 6357
Tests: TestDisabledMetrics.java in microprofile/metrics 6436
Tests: TestExtendedKPIMetrics.java from microprofile/metrics as it i… 6437
Tests: Update bookstore test for Nima to add jsonb and jackson media 6577
Tests: Use Hamcrest assertions instead of JUnit in examples/todo-app (#1749) 6293 and others
Tests: nima bookstore test 6349

4.0.0-ALPHA5

This is the fifth 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-ALPHA5.

CHANGES

Config: Configuration fixes 6145
Config: Describe disabling config token replacement 6170
FaultTolerance: Reactive FT Module Info fix 6238
HTTP2: Issue 5425: Added configurable validate-path and max-concurrent-streams to HTTP 2. 5981
Media: Reactive Media Common deprecated cleanup 6098
Messaging: AQ connector @ConnectorAttribute 6038
OCI: Register OciMetricsSupport service only when enable flag is set to true 6053
Security: Nima and Reactive implementation of OIDC provider separated 6055
Security: OIDC logout functionality fixed 6131
Security: Reloadable server TLS KeyStore 5964
Tracing: Fix order of initialization of tracing and security. (#5987) 6034
Tracing: Fix parent handling in OpenTelemetry 6092
WebClient: Need to use a ConcurrentHashMap in DefaultDnsResolver 6207
WebServer: 100 continue request reset fix 6251
WebServer: 100 continue triggered by content request 5965
WebServer: ContentEncodingContext Builder and passing ContentEncodingContext instance from WebServer to Http1Connection. 5921
WebServer: Port to Nima of enhancement to allow WebSocket applications on different ports 6004
WebServer: Proposal to implement a more efficient webserver shutdown strategy 5876
WebServer: Refactor Níma connection context 6109
WebServer: Static content update 6195
WebServer: Switch default back-pressure strategy to AUTO_FLUSH from LINEAR. 5983
WebServer: Update BodyPart to return Optional instead of a nullable String 6101
Webserver: Support for interruption of HTTP/2 connections for efficient shutdowns 6041
Build: Configure helidon-mave-plugin jlink-image to use --enable-preview 6048
Build: Correct arrangement of fields, methods and inner types. 6114
Build: Fix duplicate maven-failsafe-plugin declaration in dbclient integration test 6241
Build: Idea code style 6111
Build: Remove user specific package from the code style. 6144
Build: Use https in pom.xml schemaLocation - iteration 1 (#5657) 6043 and others
Dependencies: Cleanup Helidon BOM by removing artifacts that are not deployed 6047
Dependencies: Upgrade Jersey 3.1.1 6171
Dependencies: Upgrade Weld to 5.x #5815 5830
Dependencies: jakarta.activation cleanup 6138
Docs: Restore navbar glyphs 6179
Examples: Add application parent pom for Nima applications. Use in nima examples. 6232
Examples: Nima Quickstart Archetype 6229
Tests: Use Hamcrest assertions instead of JUnit 6160 and others
Tests: LRA TCK failing randomly #6106 6107
Tests: intermittent issue on OciMetricsSupportTest 6151

4.0.0-ALPHA4

This is the fourth 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-ALPHA4.

MicroProfile Support

4.0.0-ALPHA4 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

Logging: Change JUL to System.Logger in most modules 5936
Messaging: WLS JMS Object-Based Security 5852
MicroProfile: Deprecate MicroProfile Tracing 5909
OCI: Replace OCI Java SDK shaded jar with v3 for OCI integration 5908
OCI: helidon metrics to oci integration 5945
Pico: Builder updates, fixes and enhancements 5977
Security: Default tenant is not included for propagation 5900
Security: Oidc tenant name now properly escaped 5873
Tests: Dbclient Integration Tests Fixed 4860
WebServer: implement a more efficient webserver shutdown strategy 5876
WebServer: Shutdown hook alignment Níma and MP. 5913
WebSocket: UriQuery should not support null parameters. 5950
WebSocket: client and testing update 5831
Dependencies: Upgrade OCI SDK to 3.2.1 5956
Docs: Documentation updates to correct wrong instructions for HOCON config parsing 5975
Examples: examples missing helidon-config-yaml dependency 5919
HTTP/2: Configurable protocols 5883

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

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