ObjectDB ObjectDB

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JPA Lifecycle Events

and any access level (public, protected, package and private) but should not be static. The annotation ... call EntityManager or Query methods and should not access any other entity objects. If a callback method
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ObjectDB Website - Terms and Conditions of Use

1. Terms By accessing and using this web site, you agree to be bound by these web site Terms and Conditions of Use, all applicable laws and regulations, and agree that you are responsible ... from using or accessing this site. The materials contained in this web site are protected by
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General Settings and Logging

-history size="50" user="true" password="true" /> ObjectDB manages a list of the recently accessed ... if passwords should also be saved with URLs. Saving username and password with the URL makes accessing
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JPA Primary Key

are deleted from the database. The primary key value of an entity can be accessed by declaring a primary ... continuously and can be collected by accessing a minimum number of database pages. On the other end
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Database Replication and Clustering

, the master database can be accessed ordinarily as follows: EntityManagerFactory emf = Persistence ... different URL is required in order to access the slave database: EntityManagerFactory emf = Persistence
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Working with JPA Entity Objects

, the existing managed entity object is returned without actually accessing the database (except retrieval by refresh, which always requires accessing the database). The main role of the persistence context
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Is ObjectDB better than Object Relational Mapping (ORM)?

a JPA ORM provider (Hibernate, TopLink, EclipseLink or DataNucleus) to access relational databases when necessary - with exactly the same code.
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SELECT clause (JPQL / Criteria API)

several other methods for accessing the result data. CriteriaBuilder's construct JPQL user defined result objects
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SSL Configuration

when accessing remote ObjectDB databases over an insecure network such as the Internet. SSL Keystore
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Server Configuration

the data directory and in its subdirectories can be accessed by the server. Appropriate file

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.

Need Help?

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