This week's Java roundup for November 28th, 2022, features news from OpenJDK, JDK 20, JavaFX 20, Spring Integration 6.0, Spring Vault 3.0, Spring Cloud 2022.0.0-RC3, AWS introduces Lambda SnapStart, Quarkus 2.14.2, 2.13.5 and 2.15.0.CR1, Apache Camel 3.18.4 and progress on JHipster upgrade to Spring Boot 3.0.

OpenJDK

JEP 432, Record Patterns (Second Preview), was promoted from Proposed to Target to Targeted status for JDK 20. This JEP updates since JEP 405, Record Patterns (Preview), to include: added support for inference of type arguments of generic record patterns; added support for record patterns to appear in the header of an enhanced for statement; and remove support for named record patterns.

JEP 433, Pattern Matching for switch (Fourth Preview), was promoted from Proposed to Target to Targeted status for JDK 20. This JEP updates since JEP 427, Pattern Matching for switch (Third Preview), to include: a simplified grammar for switch labels; and inference of type arguments for generic type patterns and record patterns is now supported in switch expressions and statements along with the other constructs that support patterns.

JEP 434, Foreign Function & Memory API (Second Preview), was promoted from Proposed to Target to Targeted status for JDK 20. This JEP, under the auspices of Project Panama, evolves: JEP 424, Foreign Function & Memory API (Preview), delivered in JDK 19; JEP 419, Foreign Function & Memory API (Second Incubator), delivered in JDK 18; and JEP 412, Foreign Function & Memory API (Incubator), delivered in JDK 17. It proposes to incorporate refinements based on feedback and to provide a second preview in JDK 20. Updates include: the MemorySegment and MemoryAddress interfaces are now unified, i.e., memory addresses are modeled by zero-length memory segments; and the sealed MemoryLayout interface has been enhanced to facilitate usage with JEP 427, Pattern Matching for switch (Third Preview).

JEP 429, Scoped Values (Incubator), was promoted from Candidate to Proposed to Target for JDK 20. This incubating JEP, formerly known as Extent-Local Variables (Incubator) and under the auspices of Project Loom, proposes to enable sharing of immutable data within and across threads. This is preferred to thread-local variables, especially when using large numbers of virtual threads.

JEP 436, Virtual Threads (Second Preview), was promoted from Candidate to Proposed to Target for JDK 20. This JEP, under the auspices of Project Loom, proposes a second preview from JEP 425, Virtual Threads (Preview), delivered in JDK 19, to allow time for additional feedback and experience for this feature to progress. It is important to note that no changes are within this preview except for a small number of APIs from JEP 425 that were made permanent in JDK 19 and, therefore, not proposed in this second preview.

JEP 437, Structured Concurrency (Second Incubator), was promoted from Candidate to Proposed to Target for JDK 20. This JEP, also under the auspices of Project Loom, proposes to reincubate this feature from JEP 428, Structured Concurrency (Incubator), delivered in JDK 19, to allow time for additional feedback and experience. The only change is an updated StructuredTaskScope class to support the inheritance of scoped values by threads created in a task scope. This streamlines the sharing of immutable data across threads.

The reviews for these three JEPs conclude on December 6, 2022.

JDK 20

Build 26 of the JDK 20 early-access builds was also made available this past week, featuring updates from Build 25 that include fixes to various issues. More details on this build may be found in the release notes.

For JDK 20, developers are encouraged to report bugs via the Java Bug Database.

JavaFX 20

Build 10 of the JavaFX 20 early-access builds was made available to the Java community. Designed to work with the JDK 20 early-access builds, JavaFX application developers may build and test their applications with JavaFX 20 on JDK 20.

Spring Framework

Spring Integration 6.0 has been released featuring: a JDK 17 and Jakarta EE 9 baseline; support for native images with GraalVM and Spring AOT engine; observability instrumentation with Micrometer and Micrometer Tracing; and support for Jakarta EE 10. Further details on this release may be found in the what's new page.

Spring Vault 3.0 has been released featuring: a JDK 17 baseline; support for additional HTTP Clients, including the reactive JDK HTTP Client; and support for Vault Repositories using versioned Key/Value secrets engines. More details on this release may be found in the release notes.

The third release candidate of Spring Cloud 2022.0.0, codenamed Kilburn, has been made available to the Java community. This version provides updates to the RC3 versions of Spring Cloud sub-projects such as: Spring Cloud OpenFeign 4.0.0, Spring Cloud Commons 4.0.0, Spring Cloud Function 4.0.0 and Spring Cloud Starter Build 2022.0.0. There are, however, breaking changes with the removal of sub-projects: Spring Cloud CLI, Spring Cloud for Cloud Foundry and Spring Cloud Sleuth. Spring Cloud 2022.0.0-RC3 requires Spring Boot 3.0.0. Further details on this release may be found in the release notes.

Amazon Web Services

At the recent re:Invent conference, Amazon Web Services (AWS) introduced a new feature for their AWS Lambda project, Lambda SnapStart, designed to reduce the cold start for Java functions and to accelerate lambda functions. Support for Lambda SnapStart has already been implemented by Quarkus and Micronaut. More details may be found in this InfoQ news story and AWS blog post.

Quarkus

Red Hat has released versions 2.14.2 and 2.13.5 of Quarkus that primarily provide a fix for CVE-2022-4116, a vulnerability in the Dev UI Config Editor that is vulnerable to drive-by localhost attacks leading to remote code execution. This release also hardens handling of Cross-Origin Resource Sharing (CORS) to include changing 200 OK to 403 FORBIDDEN when a CORS request is rejected because of an invalid origin. Further details on these releases may be found in the release notes for version 2.14.2 and version 2.13.5.

On the road to Quarkus 2.15.0, the first release candidate was also made available that delivers new features such as: integration with Quarkus CRaC/Firecracker; a migration of the gRPC extension to the new Vert.x gRPC implementation; support for filtering by named queries in REST Data using the Panache extension; and dependency upgrades to GraalVM 22.3.0, Mandrel 2.13 and SmallRye GraphQL 1.9.0.

Apache Camel

Apache Camel 3.18.4 has been released featuring 27 bug fixes, improvements and dependency upgrades to Spring Boot 2.7.6 and HyperSQL DB 2.7.1. More details on this release may be found in the release notes.

JHipster

Over at JHipster, work has begun to upgrade the platform to Spring Boot 3.0. Matt Raible, developer advocate at Okta, Java Champion and member of the JHipster development team, provided an update on issues the team has encountered so far, namely: BlockHound needs a new entry for WebFlux; Health Check doesn't work in Elasticsearch 8+; and MongoDB and WebFlux deadlocks with JUnit and MongoDB driver 4.2+. Further details on these issues may be found in this GitHub pull request.