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Using @NamedEntityGraph to load JPA entities more selectively in N+1 scenarios

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 ...
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Spring 4: CGLIB-based proxy classes with no default constructor

In Spring, if the class of a target object that is to be proxied doesn’t implement any interfaces, then a CGLIB-based proxy will be created. Prior to Spring 4, CGLIB-based proxy classes ...
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Java EE7 and Maven project for newbies – part 7

Resuming from the previous parts Part #1, Part #2, Part #3, Part #4, Part #5 , Part #6 In the previous post (num 6) we discovered how we can unit test our JPA2 domain model, using ...
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Hibernate and UUID identifiers

Introduction In my previous post I talked about UUID surrogate keys and the use cases when there are more appropriate than the more common auto-incrementing identifiers. A UUID database ...
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Tracing SQL statements in JBoss AS 7 using a custom logging handler

Using an ORM to abstract from your specific database and to let it create and issue all the SQL statements you would have to write by hand yourself seems handy. This is what made ORM ...
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Spring Integration Java DSL sample – further simplification with Jms namespace factories

In an earlier blog entry I had touched on a fictitious rube goldberg flow for capitalizing a string through a complicated series of steps, the premise of the article was to introduce ...
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Codename One & Java Code Geeks are giving away free JavaOne Tickets (worth $3,300)!

Would you like to go to JavaOne? Besides being a cool conference its loads of fun with shows and events thru-out the city.   Now you have a chance, Codename One and Java Code Geeks ...
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How to use Salesforce REST API with your JavaServer Pages

Abstract: This tutorial gives an example of a JSP and how to integrate it with the Salesforce REST API. We will walk through the step­by­step process of creating an external client ...
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Java EE Pitfalls #1: Ignore the default lock of a @Singleton

EJB Singleton Beans were introduced by the EJB 3.1 specification and are often used to store cached data. This means, we try to improve the performance of our application by using a ...
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Java EE 8 – Deliver More Apps to More Devices

If there’s one thing I dislike about summer, it is the fact that there isn’t much news to share or talk about. Whoever decided to put the Java Day Tokyo into this boring ...
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