Natural Born Coder

Tag: Persistence

  • JavaFX 2 with JPA 2 and Drag and Drop – Part 3

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    doozer
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    This article will cover a method that can be used to include more than one entity type in a tree (the same system will work for other widgets such as lists and tables) by using a proxy holder. The previous articles in this series covered setting up the demo application and getting started with JPA.

  • JavaFX 2 with JPA 2 and Drag and Drop – Part 2

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    doozer
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    In the first part of this series I gave an over view of the project and how to install and run it. Now I’ll cover the JPA aspects of the project.

  • JavaFX 2 with JPA 2 and Drag and Drop – Part 1

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    doozer
    in

    After a bit of a break away doing other things I’m back on a project that uses JavaFX 2. So far this project hasn’t required much in the way of persistence either for settings or data but a new feature I’m working on makes use of a database. I use JPA 2 for web based…

  • Simple CRUD Example – Part 2

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    doozer
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    In the last article I showed you how to create a Debry database and set up a persistence unit. In this article I’ll create a very basic CRUD application. Using JSF 2, JPA 2 and EJB 3.1.

  • JPA2 Serialized Blob Never Really Null

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    doozer
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    This one got me late on a Friday (actually after work so I was doubly frustrated) and is to do with how JPA2 persists attributes of items that are not of basic Java types and which are also not entities. In order words attributes that implement Serializable and get shoved into BLOB fields.

  • Local transaction already has 1 non-XA Resource

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    doozer
    in

    While developing a bit of functionality that transferred data from one database to another in my current JEE 6 web application I came upon the exception below. Surprisingly for exceptions from deep within system this one is actually quite informative if you understand what it’s saying: the key is knowing that XA means distributed transaction. Transactions can be…

  • JPA 2 Eager Fetching on a Collection

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    by

    doozer
    in

    Quick little JPA 2 issue that I faced today that I’m sure many other people have run into especially when starting out. The problem was and error message such as the one shown below when attempting to display the contents of a Set of other entities in a JSF page