![lombok intellij lombok intellij](https://miro.medium.com/max/774/0*ews4MbAXT07GFywf.jpg)
Obviously, when is used the compiler does not generate the default constructor, the same is true for to a class is as if you added = AccessLevel.PACKAGE) to the class and applied the annotation to this all-args-constructor. JPA Buddy has a special action for it:Īccording to the JPA specification, all entity classes are required to have a public or protected no-argument constructor. This can be achieved by placing on the desired fields, or by using = true) on the class and on non-lazy fields. We believe and should not be used for entities at all, so JPA Buddy alerts can still be used, but all the lazy fields need to be excluded. It can also lead to a LazyInitializationException if it happens outside a transaction.
![lombok intellij lombok intellij](https://www.baeldung.com/wp-content/uploads/2019/01/lombok6.png)
This can easily harm the application performance. This can have an unwanted side-effect for JPA entities: accidentally loading lazy attributes.įor example, calling hashCode() on a lazy may fetch all the entities it contains. These methods call equals()/hashCode()/toString() on every field of an object. By default, it'll print your class name, along with each field, in order, separated by commas. The same is right for class definition may be annotated with to let lombok generate an implementation of the toString()method. Accidentally Loading Lazy AttributesĪs mentioned above, includes all the object fields by default. was a UUID set by the app), but DB-generated ids are more common. It wouldn’t be an issue if the id was set during the entity object creation (e.g. So the HashSet looks for the entity in a different bucket and cannot find it.
![lombok intellij lombok intellij](https://i0.wp.com/petrepopescu.tech/wp-content/uploads/2021/04/image-1.png)
Once the id is generated (on its first save) the hashCode gets changed. This means there are no fields we can rely on to calculate the hashCode. Even the id of an entity is often generated by a database, so it gets changed after the entity is first persisted. Broken HashSets (and HashMaps)Įntity classes often get annotated with or The documentation of states:īy default, it'll use all non-static, non-transient fields, but you can modify which fields are used (and even specify that the output of various methods is to be used) by marking type members with or implementation for JPA entities is a sensitive subject. This article shows the most common issues you may face using Lombok with JPA entities.
![lombok intellij lombok intellij](https://www.bswen.com/images/20180524_lombok1.png)
Lombok intellij code#
This is why we introduced a number of code inspections for Lombok to JPA Buddy. Analyzing the projects, we see people stumble into the same pitfalls over and over again. It is absolutely fine to use Lombok in your JPA projects, but it has some caveats. Turns out, a lot of them use Lombok for their entities. Before writing a single line of code for it, we went through a ton of projects on GitHub to understand how people work with JPA. We develop JPA Buddy – a plugin for IntelliJ IDEA designed to make the use of JPA easier.
Lombok intellij how to#
In this article, we’ll look at how the misuse of Lombok can hurt the performance of JPA applications or even crash them, and how to avoid that but still gain the benefits of using Lombok. However, there are a few things to consider when using it with JPA. Lombok is a great tool that makes your Java code concise and clean.