You can follow the patterns in "How Do I Wrap a Synchronous, Blocking Call?" to achieve the same effect. If you can't use R2DBC, you can use Reactor with synchronous JPA as an alternative. Simply put, R2DBC is basically an SQL mapper.
However, R2DBC doesn't support object relations and automatic change detection, which are some of JPA's greatest advantages. If you would like to know more about reactive programming, you can read up about it on the Red Hat blog article 5 Things to Know About Reactive Programming, and on our own LINE Engineering Blog article Let's Play with Reactive Streams on Armeria - Part 1.īefore the release of Hibernate Reactive, we used R2DBC as there were no existing reactive libraries for JPA. While many of you might have a preconceived notion that JPA cannot be reactive, Hibernate released a reactive JPA library called Hibernate Reactive. In this post, we'll be looking at Kotlin JDSL Reactive modules. In the last post, Kotlin JDSL: Writing JPA Criteria API more easily with Kotlin, we looked into the background of why we developed Kotlin JDSL and how we use it. This is the second post in a series about Kotlin JDSL.
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