Frontend

Languages

• JavaScript
• TypeScript

Frameworks

• React ^18.2
• Stripes ^9.0.0

Build tools

• Node 18 (because Node 16 reaches end of life on 2023-09-11)
• Yarn 1

Unit test stack

• Jest ^26.6.3 (^29 is preferred)
• RTL ^12.1.2  (^14 is preferred)

End-to-end test stack

• Cypress ^9.1.1

Backend

Languages

• Java 17 (migration instructions: JDK 17 and Java 17)
• Groovy 2
• OpenAPI (OAS) version 3.0 (see https://dev.folio.org/start/primer-oas/)

Frameworks

• Spring Boot 3.1.* (OSS support until 2024-05-18)
• Spring Framework 6.0.* (OSS support until 2024-08-31)
• Spring Data REST 4.1.*. (OSS support until May 2024)
• Spring Security 6.1.* (OSS support until May 2024)
• Spring Integration 6.1.* (OSS support until May 2024)
• Spring Batch 5.0.* (OSS support until May 2024)
• Spring for Apache Kafka 3.*.* (OSS support)
• folio-spring-base TBD
• Grails 5
• vertx 4.4.*
• folio-vertx-lib 3.1.*
• raml-module-builder TBD [deprecated: only existing FOLIO modules may continue to use raml-module-builder]
• Lombok

Build tools

• Maven 3.8 or later
  
• JDK 17 (migration instructions: JDK 17 and Java 17)
• Docker
• Gradle

Unit test stack / Build-time integration test stack

• JUnit 4 or 5
• rest-assured 
• testcontainers 

Integration test stack

• karate 
• cucumber-reporting

Infrastructure

• Postgresql 12
• OpenSearch 2 / Elasticsearch 8 – (OpenSearch maintenance policy) (Elasticsearch support policy, EOL dates, release history)
• Kafka
• S3/MInIO

Support period

Technology versions must support the full Quesnelia support period that ends around December 2024: Quesnelia will be released in April 2024 and will be supported until Sunflower (R3 2024) gets released around December 2024 (based upon assumption that future releases will follow a similar cadence to previous releases), see FOLIO support policy.