Vaadin Lazy Loading Techniques

When using grids, trees, or any other of the multi-valued component with Vaadin you often want to display data from a database table, and typically you have more than a few rows in the database. In this case loading, thousands or even millions of records don’t make sense and would be a huge performance problem.

Der wahre Wert von Microservices

Lesen Sie den vollständigen Artikel über Microservices von Simon Martinelli, der in Java Spectrum erschienen ist.

Type Safe SQL in Java

No matter if you are using frameworks like JPA, MyBatis or Spring Data JDBC you always end up declaring the SQL statements as a Java String. Strings, String, Strings No matter if you are using frameworks like JPA, MyBatis or Spring Data JDBC you always end up declaring the SQL statements as a Java String.The problem with this approach is [...]

Type Safe SQL in Java with jOOQ

No matter if you are using frameworks like JPA, MyBatis or Spring Data JDBC you always end up declaring the SQL statements as a Java String.

Java Persistence Done Right

When it comes to accessing relational databases with Java, people usually think of two options: SQL or ORM

Introduction to Database Migrations with Spring Boot and Flyway

If you are working with Spring Boot there are several ways to initialize the database.

Die wichtigsten Vorteile der agilen Softwareentwicklung

Es ist kein Geheimnis, dass Agile die Methode ist, in die die Softwareentwicklung bereits stark eingetreten ist. Agile ist inzwischen so populär, dass der Begriff in nahezu jeder Branche Verwendung findet und in Konferenzräumen sowie virtuellen Meetings weltweit häufig genutzt wird. Agile Softwareentwicklung ist überall Was genau macht agile Entwicklung so spannend? Wie passen Menschen [...]

How to JOIN two Entities without Mapped Relationship

Often you don’t want to map all relationships in an entity model (a blog post about this topic in detail will follow).

Inheritance in JPA

Relational databases have tables and columns and object-oriented programming languages have classes and fields but they also provide inheritance. Relational databases have tables and columns and object-oriented programming languages have classes and fields but they also provide inheritance. A concept that is not known in relational databases. JPA provides solutions to map inheritance to database [...]

JPA Inheritance Strategies

Relational databases have tables and columns and object-oriented programming languages have classes and fields but they also provide inheritance.

Should you use Enums with JPA?

With JPA it’s possible to map Java enums to columns in a database table using the Enumerated annotation With JPA it’s possible to map Java enums to columns in a database table using the Enumerated annotation: @Enumerated private Color color; An enum can be mapped as an integer or a string but mapping of enums [...]

JPA Enums: Mapping Strategies and Trade-Offs

With JPA it’s possible to map Java enums to columns in a database table using the Enumerated annotation.