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Schema Update

is required when persistable classes are renamed or moved to another package. Running the application ... that after such changes the application is run only with the configuration that matches these changes exactly ... -server mode the <schema> instructions should usually be located on the client

Obtaining a JPA Database Connection

with an EntityManager. Further, in a multithreaded application every thread usually has its own EntityManager instance while at the same time sharing a single application-wide EntityManagerFactory ... or a socket to a remote server) in a connection pool and use them to speed up future EntityManager

ObjectDB Overview

, etc.) but in a way that makes development easier and applications faster. ObjectDB Database Key ... . Suitable for database files ranging from kilobytes to terabytes. Supports both Client-Server mode ... . Can easily be embedded in applications of any type and size. Tested with Tomcat, Jetty, GlassFish, JBoss

Server crash - Mismatch client-server protocol prefix

We've been having a problem where our ObjectDB server goes unresponsive every 2 days or so. I've reviewed the server-side logs, and there are no events logged shortly before the crash. Once the server gets in this state, it is unresponsive to bin/server.sh restart; I have had to reboot the entire

Database Replication and Clustering

, which is managed on an ordinary ObjectDB database server. Any ObjectDB database on any server (but not in ... and only requires running an ObjectDB database server with appropriate <replication> elements in the configuration: <server>     <connection port="6001" max="100" />     <data path="$objectdb/db

Database Management Settings

The <database> configuration element specifies back end (database engine) settings that are relevant on the server side and in embedded mode. The default configuration file contains the following ... for most applications. The <recovery> element <recovery enabled="true" sync="false" path="." max

Eclipse/JPA Java EE Tutorial

a full Java EE 6 MVC (Model View Controller) web application in Eclipse - using GlassFish, ObjectDB and JPA. The demo web application manages a basic guestbook page. Every visitor can sign the guestbook ... Developers. GlassFish Server 3.0.1 (or above). The last version of ObjectDB (just download and extract

Step 4: Add a Servlet Class

session bean, which is instantiated and injected by the application server into the guestDao field ... page that will serve as the application view and will produce the guestbook output.

Step 4: Add a Servlet Class

the application server into the guestDao field automatically (since the field is marked with the @EJB annotation). The next step is adding a JSP page that will serve as the application view and will produce the guestbook output.

JPA Web App Tutorial - NetBeans Project

To open and run the JPA Web Application tutorial project in NetBeans: Download and extract the project zip file: JPA Web App - Maven Project (6KB) Open the Maven project in NetBeans: Select File ... Run > Run Main Project... (or F6). Choose or define the server and click OK. If a browser is not opened - open it at http://localhost:8080/Guestbook/.

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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