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What is ObjectDB?

ObjectDB is an Object Oriented Database Management System (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing, etc.), but it uses an object oriented model to store and manage data. You can easily store ordinary
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JPA Query API

, the same JPQL query which retrieves all the Country objects in the database is represented by both q1
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ObjectDB 2.8 Developer's Guide

, retrieve, update and delete database objects. Explains how to use the JPA Query Language (JPQL). Presents
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Deleting JPA Entity Objects

Existing entity objects can be deleted from the database either explicitly by invoking the remove method or implicitly as a result of a cascade operation. Explicit Remove In order to delete an object from the database it has to first be retrieved (no matter which way) and then in an active
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Getting Started with JPA

This tutorial demonstrates how to create and run a simple JPA application. The demonstrated application uses JPA to store and retrieve simple Point entity objects, where each Point has two persistent fields - x and y. If you already know JPA - the source code will be straightforward
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Step 5: Add a JSP Page

for signing the guestbook, followed by a list of all the guests that have already signed (which are retrieved
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Step 5: Add a JSP Page

that have already signed (which are retrieved from the request's "guests" attribute that is set by
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Step 5: Add a JSP Page

that have already signed (which are retrieved from the request's guestDao attribute that is set by the controller in
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Step 4: Add a Servlet Class

are retrieved from the database and stored in the request's "guest" attribute. Then the processing
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Step 3: Add a Context Listener Class

attribute in the servlet context - when the web application starts (contextInitialized). Retrieves

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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