This week's Java roundup for June 12th, 2023, features news from OpenJDK, JDK 22, JDK 21, GraalVM 23, various releases of: GraalVM Build Tools, Spring Framework, Spring Data, Spring Shell, Payara Platform, Micronaut, Open Liberty, Quarkus, Micrometer, Hibernate ORM and Reactive, Project Reactor, Piranha, Apache TomEE, Apache Tomcat, JDKMon, JBang, JHipster, Yupiik Bundlebee; and QCon New York 2023.
OpenJDK
After its review had concluded, JEP 404, Generational Shenandoah (Experimental), was officially removed from the final feature set in JDK 21. This was due to the "risks identified during the review process and the lack of time available to perform the thorough review that such a large contribution of code requires." The Shenandoah team has decided to "deliver the best Generational Shenandoah that they can" and will seek to target JDK 22.
Julian Waters, OpenJDK development team at Oracle, has submitted JEP Draft 8310260, Move the JDK to C17 and C++17, to allow the use of the C17 and C++17 programming language features in JDK source code. Due to the required minimal JDK 17 version in Microsoft Visual C/C++ Compiler: Visual Studio 2019, this draft proposes to apply changes to the build system such that the existing C++ flag, -std:c++14, will change to -std:c++17 and the existing C flag, -std:c11, will change to -std:c17.
JDK 21
Build 27 of the JDK 21 early-access builds was also made available this past week featuring updates from Build 26 that include fixes to various issues. Further details on this build may be found in the release notes.
JDK 22
Build 2 of the JDK 22 early-access builds was also made available this past week featuring updates from Build 1 that include fixes to various issues. More details on this build may be found in the release notes.
For JDK 22 and JDK 21, developers are encouraged to report bugs via the Java Bug Database.
GraalVM
Oracle Labs has introduced Oracle GraalVM with a new distribution and license model for both development and production applications. GraalVM Community Components 23.0.0 provides support for JDK 20 and JDK 17 with the GraalVM for JDK 17 Community 17.0.7 and GraalVM for JDK 20 Community 20.0.1 editions of GraalVM. New features in Native Image include: support for G1 GC; compressed object headers and pointers for a lower memory footprint; and machine learning to automatically infer profiling information. InfoQ will follow up with a more detailed news story.
On the road to version 1.0, Oracle Labs has also released version 0.9.23 of Native Build Tools, a GraalVM project consisting of plugins for interoperability with GraalVM Native Image. This latest release provides notable changes such as: a fix for the compatibility of the "collect reachability metadata" task with Gradle's configuration cache; remove the use of the deprecated Gradle GFileUtils class that will ultimately be removed in Gradle 9; and add a display of the GraalVM logo on the generated Native Build Tools documents. Further details on this release may be found in the changelog.
Spring Framework
The first milestone release of Spring Framework 6.1 delivers bug fixes, improvements in documentation, dependency upgrades and new features such as: initial support for the new Sequenced Collections interfaces; support for Coordinated Restore at Checkpoint (CRaC); compatibility with virtual threads; and a ClientHttpRequestFactory interface based on the HttpClient class provided by Jetty. More details on this release may be found in the release notes.
Similarly, versions 6.0.10 and 5.3.28 of Spring Framework have also been released featuring bug fixes, improvements in documentation, dependency upgrades and new features such as: a new remoteServer() method added to the MockHttpServletRequestBuilder class to set the remote address of a request; a new matchesProfiles() methods added to the Environment interface to determine whether one of the given profile expressions matches the active profiles; and declare the isPerInstance() method defined in the Advisor interface as default to eliminate the unnecessary implementation requirement of that method. Further details on these releases may be found in the release notes for version 6.0.10 and version 5.3.28.
Versions 2023.0.1, 2022.0.7 and 2021.2.13, service releases of Spring Data, ship with bug fixes and respective dependency upgrades to sub-projects such as: Spring Data Commons 3.1.1, 3.0.7 and 2.7.13; Spring Data MongoDB 4.1.1, 4.0.7 and 3.4.13; Spring Data Elasticsearch 5.1.1, 5.0.7 and 4.4.13; and Spring Data Neo4j 7.1.1 7.0.7 and 6.3.13.
Versions 3.1.1 and 3.0.5 of Spring Shell 3.0.5 have been released with notable bug fixes such as: a target annotated with @ShellAvailability not registering with Ahead-of-Time processing; native mode broken on Linux; and an unexpected comma inserted at the end of a parsed message. More details on these releases may be found in the release notes for version 3.1.1 and version 3.0.5.
Payara
Payara has released their June 2023 edition of the Payara Platform that includes Community Edition 6.2023.6, Enterprise Edition 6.3.0 and Enterprise Edition 5.52.0. All three versions feature: the removal of the throwable reference of the ASURLClassLoader class to eliminate class loader leaks; and a fix for the configuration of the dependency injection kernel, HK2, for JDK 17 compilation. Further details on these versions may be found in the release notes for Community Edition 6.2023.6, Enterprise Edition 6.3.0 and Enterprise Edition 5.52.0.
Micronaut
The fourth release candidate of Micronaut 4.0 delivers bug fixes and improvements such as: add a default method to the overloaded set of writeValueAsString() methods in the JsonMapper interface; improved exception handling on scheduled jobs; and a new parameter, missingBeans=EndpointSensitivityHandler.class, for the @Requires annotation on the EndpointsFilter class to convey that endpoint sensitivity is handled externally and the filter will not be loaded. More details on this release may be found in the release notes.
Open Liberty
IBM has released Open Liberty 23.0.0.6-beta that provides: continued improvements in their InstantOn functionality; continued support for the Jakarta Data specification; and improvements for OpenID Connect clients with support for Private Key JWT client authentication and RFC 7636, Proof Key for Code Exchange by OAuth Public Clients (PKCE).
Quarkus
Quarkus 3.1.2.Final, the second maintenance release, provide improvements in documentation, dependency upgrades and bug fixes such as: a ClassNotFoundException when using the Qute Templating Engine in dev mode; a NullPointerException in version 3.1.1 when using a Config Interceptor; and startup of the Quarkus server hangs indefinitely when using the OidcRecorder class. Further details on this release may be found in the release notes.
Micrometer
Versions 1.11.1, 1.10.8 and 1.9.12 of Micrometer Metrics have been released with dependency upgrades and bug fixes such as: an improper variable argument check in the KeyValues class that leads to NullPointerException; loss of scope and context propagation between Project Reactor and imperative code blocks; and random GRPC requests return null upon calling the currentSpan() method defined in the Tracer class. More details on these releases may be found in the release notes for version 1.11.1, version 1.10.8 and version 1.9.12.
Similarly, versions 1.1.2 and 1.0.7 of Micrometer Tracing have been released with dependency upgrades, improvements in documentation and bug fixes: abstractions from the Span interface are not equal when when delegating to the same OpenTelemetry object; and a fix for Project Reactor with Micrometer 1.10 by using null scopes instead of clearing thread locals. Further details on these releases may be found in the release notes for version 1.1.2 and version 1.0.7.
Hibernate
The release of Hibernate ORM 6.2.5.Final provides bug fixes such as: caching not working properly for entities with inheritance when the hibernate.cache.use_structured_entries property was set to true; generic collections not mapped correctly using a @MappedSuperclass annotation; and mapping of JSON-B of different types in a class inheritance hierarchy does not work.
The release of Hibernate Reactive 2.0.1.Final ships with compatibility with Hibernate ORM 6.2.5.Final and adds support for the @Lob annotation for MySQL, MariaDB, Oracle, and Microsoft SQLServer.
Project Reactor
Project Reactor 2022.0.8, the eighth maintenance release, provides dependency upgrades to reactor-core 3.5.7, reactor-netty 1.1.8. There was also a realignment to version 2022.0.8 with the reactor-kafka 1.3.18, reactor-pool 1.0.0, reactor-addons 3.5.1 and reactor-kotlin-extensions 1.2.2 artifacts that remain unchanged. More details on this release may be found in the changelog.
Piranha
The release of Piranha 23.6.0 delivers notable changes such as: removal of the deprecated Logging Manager and MimeTypeManager interfaces; deprecation of the --war and --port command line arguments; and add HTTPS support to the Piranha Maven plugin. Further details on this release may be found in their documentation and issue tracker.
Apache Software Foundation
Apache TomEE 9.1.0 has been released featuring bug fixes, improvements in documentation, dependency upgrades and improvements: use of ActiveMQ 5.18.0 Jakarta EE-compatible client in favor of the shade approach with TomEE; and backport the fixes that addressed CVE-2023-24998 and CVE-2023-28708 in Apache Tomcat from version 10.1.x to version 10.0.27. More details on this release may be found in the release notes.
Versions 10.1.10 and 8.5.90 of Apache Tomcat delivers: support for JDK 21 and virtual threads; an update to HTTP/2 to use the RFC-9218, Extensible Prioritization Scheme for HTTP, prioritization scheme; a dependency upgrade to Tomcat Native to 2.0.4 and 1.2.37, respectively which includes binaries for Windows built with OpenSSL 3.0.9 and 1.1.1u, respectively; and a deprecation of the xssProtectionEnabled property from the HttpHeaderSecurityFilter class and set the default value to false. Further details on these versions may be found in the changelogs for version 10.1.10 and version 8.5.90.
JDKMon
Versions 17.0.67 and 17.0.65 of JDKMon, a tool that monitors and updates installed JDKs, has been made available this past week. Created by Gerrit Grunwald, principal engineer at Azul, these new versions provide: support for the new GraalVM Community builds; and a small icon added to the name of a JDK to indicate that it is managed by SDKMan. An experimental new feature in version 17.0.65 includes a new switch-jdk script placed in a user's home folder that makes it possible to switch to a specific JDK in a shell session.
JBang
The release of JBang 0.108.0 ships with support for JEP 445, Unnamed Classes and Instance Main Methods (Preview). It is important to note that developers will be required to build and install JDK 21 early-access to use JEP 445 due to the Temurin JDK builds only providing JDK 20 as the latest version.
JobRunr
JobRunr 6.2.2 has been released to provide notable changes: improve caching of job analysis when using Java Stream API; and the ElectStateFilter and ApplyStateFilter interfaces are invoked while there is no change of state.
JHipster
The first beta release of JHipster 8.0.0 delivers bug fixes and notable changes such as: the use of Consul by default; a fix for Apache Cassandra tests by dropping CassandraUnit and adding reactive tests; and a move to deny-by-default over allow-by-default by using the authorizeHttpRequests() method defined in Spring Security HttpSecurity class. It is important to note that there is a rename of the AngularX configuration option to Angular for backward compatibility as AngularX will be removed in the GA release of JHipster 8.0. More details on this release may be found in the release notes.
Yupiik
The release of Yupiik Bundlebee 1.0.20, a light Java Kubernetes package manager, provides updates such as: additional placeholders for the default observability stack; support for namespace placeholder keywords to enable the reuse of globally configured namespace in placeholders; and proper usage of DaemonSet usage for Loki. Further details on this release may be found in the release notes.
QCon New York
After a three-year hiatus due to the pandemic, the 9th annual QCon New York conference was held at the New York Marriott at the Brooklyn Bridge in Brooklyn, New York, this past week featuring three days of presentations from 12 tracks and keynotes delivered by Radia Perlman, Alicia Dwyer Cianciolo, Suhail Patel and Sarah Bird. More details about this conference may be found in the InfoQ daily recaps from Day One and Day Two. InfoQ will follow-up with Day Three coverage.