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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Databases are also supported by ObjectDB. The combination of Object Database features ... . Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections (limited ... (the ObjectDB Doctor). Standard Persistence APIs ObjectDB is the only Object-Oriented Database with built
. 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 ... is an extremely easy to use pure Java Object Database, which supports JPA with no mapping
. 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
the approach of traditional visual database tools. Every row in the table represents a single object ... a single database object. This type of viewer is useful for viewing data of a simple object model. In ... . A Tree window displays objects as a tree. Every database object is represented by a tree node
The Java Persistence API (JPA) provides various ways to retrieve objects from the database ... of the database. The persistence context serves as a cache of retrieved entity objects. If a requested ... with data that is retrieved from the database (or from the L2 cache - if enabled). The new entity object
" /> Removing ObjectDB evaluation restrictions (of 10 entity classes and 1,000,000 entity objects per database ... The <database> configuration element specifies back end (database engine) settings ... <database> element: <database> <size initial="256kb" resize="256kb" page="2kb" /> <recovery
), which can represent physical objects in the database. Managing an ObjectDB Object Database using JPA ... database objects. Entity Object Life Cycle The life cycle of entity objects consists of four states ... the database. An entity object becomes Managed when it is persisted to the database
To access relational databases using the Java Persistence API (JPA) you will need an Object ... . The DataNucleus ORM implementation supports also the Java Data Objects (JDO) API. ObjectDB is a full featured 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.
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 ... the assignment of names to objects in the database and the storing of instances of any persistent type
The Java Data Objects (JDO) is another standard for accessing persistent data in databases, using ... with both relational and object databases. JDO is supported by many object databases, including ObjectDB, and it is probably the most popular Java API for object databases today.