Grails 4 GA has been released, Grails is an open-source framework for rapid Web application development, which is based on the Groovy programming language, and built on Spring, Hibernate and other standard Java frameworks.
Grails 4 brings a major upgrade, the framework is now re-based on an updated minimum dependency set includes:
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Groovy 2.5.6
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GORM 7 and Hibernate 5.4
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Spring Framework 5.1.5
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Spring Boot 2.1.3
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Gradle 5.1.1
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Spock 1.2
Micronaut now is the parent Grails application context, so you can use many Micronaut features, including Micronaut HTTP client and the client Kafka, Micronaut also used to improve the start Grails applications and reduce overall memory consumption. Compared with the previous version, boot time and memory consumption has been greatly optimized and improved, mainly because of changes in SpringBoot 2.1, Grails and some internal infrastructure connected to migrate to Micronaut.