Realm est la première base de données destinée uniquement aux plates-formes mobiles qui ne repose sur aucune autre, contrairement aux nombreuses librairies qui proposent des solutions mobiles basées sur SQLite.
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The N+1 problem is a common issue when working with ORM solutions. It happens when you set the fetchType for some @OneToMany relation to lazy, in order to load the child entities only when the Set/List is accessed. Let’s assume we have a Customer entity with two relations: a set of orders and a set of addresses for each customer.
This list collects 100 high quality blogs from Java developers from all over the world. Some of these blogs may not be written by Java developers, but at least Java developers should find it useful or interesting. Reading those blogs should be fun and often bring some fresh ideas.
Queries that are created at runtime by the application are called dynamic queries. Dynamic queries are created when we pass a simple JPA compliant query string to the createQuery method of the EntityManager class. Defining a dynamic query has its advantages and disadvantages. Lets look at each one of them in turn.
The aim of this post is a summary about some handy methods for JSF developers they can use in their day-to-day work. An utility class is a good place to put all methods together. I would call such class FacesAccessor. The first method is probably the most used one. It returns managed bean by the given name.