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134

Obtaining a JPA Database Connection

In JPA a database connection is represented by the EntityManager interface. Therefore, in order to manipulate an ObjectDB database we need an EntityManager instance. Operations that modify database ... of EntityManagerFactory that represents the relevant database and then we can use that factory instance
132

ObjectDB - Object Database for Java (JPA/JDO)

Boost your application database performance. Database performance is critical as ... . Using a relational database management system (RDBMS) to store and retrieve Java objects requires slow conversions between graphs of Java objects and flat database table rows. Object Relational Mapping
127

Is ObjectDB better than competing object databases?

. However, you should consider the following points when doing your own objective comparison of object databases: ObjectDB is unique in supporting the standard APIs. It is the only object database with built in support ... Data Objects (JDO) API than competing object databases. By using a standard API such as JPA
125

Is ObjectDB a NoSQL Database?

ObjectDB is a unique NoSQL database. It doesn't have the known disadvantages and limitations ... , but they are easier to use in object oriented languages such as Java. In addition, unlike most other NoSQL databases ... can be used in applications that cannot use conventional non ACID NoSQL databases because of a requirement for a very high level of consistency.
125

Can I use ObjectDB to access a relational database?

To access relational databases using the Java Persistence API (JPA) you will need an Object Relational Mapping (ORM) tool, such as Hibernate, TopLink, EclipseLink, Open JPA or DataNucleus ... standalone Object Database Management System (ODBMS) and not an ORM tool, so it is not intended and cannot be used to access other database management systems.
124

Database Schema Evolution

entity class. This is done automatically in memory each time the entity object is loaded. The database object is only updated to the new schema when that entity object is stored to the database
37

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 ... objects (and graphs of objects) in an ObjectDB database directly. There's no need to define tables or
3

[ODB1] Chapter 6 - Persistent Objects

This chapter describes how to use ObjectDB to manage database objects. 6.1 Making Objects ... database content, or a transient object, i.e. not related to any database. Storing Objects Explicitly ... is automatically stored in the database when the transaction is committed (unless it is being deleted
3

[ODB1] Chapter 9 - ObjectDB Explorer

ObjectDB Explorer is a visual tool for managing ObjectDB databases. You can use the Explorer to browse databases, execute JDOQL queries, create new databases and edit the content of existing databases. 9.1 Running the Explorer The Explorer is a pure Java GUI application. It is shipped as
3

[ODB1] Chapter 5 - JDO Connections

The PersistenceManagerFactory interface represents a factory of database connections. Its main role is to provide PersistenceManager instances. The PersistenceManager interface represents a database connection. Every operation on a database requires a PersistenceManager instance. The Transaction

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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