Tag: java ee
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Isolated unit testing of Java EE and Spring components
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When developing modern Spring or Jakarta EE based applications and micro services there is a need for fine-granular component testing. I.e. you do not want to test your code in a full-blown environment only, because such tests will be slow. Instead, you might want to write tests at the component level using a mixture of…
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JPA Pitfalls (16): EntityManager.remove Does Not Remove Entity
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe a problem with entites not beeing removed altough EntityManager.remove succeeds.
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JPA Pitfalls (14): EntityManager.persist and Transactions
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe the result of EntityManager.persist inside and outside of a transaction.
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JPA Pitfalls (12): Lazy Loading of Relationships in a Loop
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe a potential performance problem when loading relationships in a loop.
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JPA Pitfalls (11): Iteration / Sorting in Memory or in DB
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe a potential problem when filtering in memory instead of DB.
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JPA Pitfalls (9): UPDATE/DELETE and Persistence Context
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe bulk the effect of JPQL operations on the EntityManager cache.
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