Pluggable sockets for db4o and Import data to db4o code snippets

We're glad to share two new valuable code snippets with you:

• Pluggable sockets for db4o: this reference documentation topic shows you how to hook your own socket implementation for db4o C/S communications. This is pretty useful for plugging SLL sockets and have a secure C/S channel (examples and source code included)
• Import external data to db4o: is a code snippet by Edwin Sanchez which shows you how to extract data from a stream (e.g. a text file) and dump it to db4o

Enjoy!

How to use db4o with Mozilla Rhino Script Engine

I've just uploaded code snippet by Jim Morris that shows us how to use db4o with Mozilla Rhino Script Engine. Mozilla Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users. Among its features Rhino supports: All the features of JavaScript 1.6 Allows direct scripting of Java A JavaScript shell for executing JavaScript scripts A JavaScript compiler to transform JavaScript source files into Java class files A JavaScript debugger for scripts executed with Rhino Thanks Jim! Read the rest of entry »

JPOX "DB4O" plugin 1.2.0-beta-5 released

JPOX "DB4O" plugin version 1.2.0-beta-5 is now released.This provides persistence to DB4O datastores using either the JDO1.0/2.0/2.1 API or the JPA1.0 API. Changes in this release include :- Querying using JDOQL - initial release, supporting the majority of available JDOQL features Bug fixes for transaction handling, and application identity. Addition of support for auto-start mechanisms, notifying JPOX of "known" classes for efficiency Minimised the memory overhead of collection/map wrappers Support for relative file paths in file-based DB4O persistence. In addition to this plugin release, JPOX "Core" module provides support for many new features for JDO2.1. (For the details of the changes in this release go to JPOX JIRA and for details of the status of JDOQL with JPOX see JPOX JIRA DBFO-6) Andy JeffersonJava Persistent Objects (http://www.jpox.org/) Read the rest of entry »

db4o: straight-forward persistence for Wicket

"A Little Persistence Framework for Wicket" by Tim Boudreau has been made available in our code snippets section here and shows us how to leverage db4o in Wicket web applications. Apache Wicket is a web application framework that features a proper mark-up/logic separation, a POJO data model, and a refreshing lack of XML focused on providing reusable components written with plain Java and HTML (certainly a perfect fit for db4o!). Here Tim shows us a framework which simplifies database access - i.e. get rid of far too much persistence related code dotted all over the application, which contains fairly similar code for looking up POJOs for Users, Events, Presentations, etc - centered around the concept of Wicket's detachable models (a model which looks up an object, but can dispose of it when it is not needed any more) and a proper handling of POJOs lifecycle via db4o. The challenge that this framework tries to match is how to transparently and easily create IModels for POJOs on demand, keep the database look ... Read the rest of entry »

Android maps application enhanced by db4o

Hi! Our previous db4o powered sample application for Android was pretty popular so we decided to provide a second one called MapMe. MapMe basically lets you browse 2D Google maps on Android but also has additional features such as: Zoom in and out Toggle traffic and satellite view Find location Bookmark location to db4o (full map persistence including zoom levels, and satellite and traffic views) Browse list of bookmarks Edit bookmark Navigate to location on map from bookmark Center map on current GPS reported location Planned for the next version: Track GPS movement dynamically on the screen Full text search on bookmarks In this project space you will have access to the following: an explanation of db4o persistence on the application complete source code for the Android sample application a video showing the application in action plus a walkthrough of the source code Enjoy! Related Content on this site Android Password Manager powered by db4o Android brings handsets to the next leve ... Read the rest of entry »