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10

JPA Lifecycle Events

- when an entity is identified as modified by the EntityManager. @PostUpdate - after updating an entity in
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Retrieving JPA Entity Objects

object can be uniquely identified and retrieved by the combination of its class and its primary key
10

Database Doctor

running ObjectDB Doctor's diagnosis regularly in order to identify potential problems early on. Running
10

ObjectDB Object Database Features

the server to the client. Database Doctor Diagnoses if a database file is healthy and identifies possible
10

JPA Persistence Unit

. The required name attribute (“my-pu” in the example) identifies the persistence unit when instantiating
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Database Explorer

paths in the tree and therefore may be represented by more than one node. To help identify circles in
10

JPA Primary Key

the database is uniquely identified (and can be retrieved from the database) by the combination of its type
1

[ODB1] Chapter 5 - JDO Connections

of two strings, a name that identifies the property, and a value for that property. The two properties
0

javax.jdo.spi.PersistenceCapable

to provide the value of the single field identified by fieldNumber. The owning StateManager uses this method to ask the instance to provide the value of the single field identified by fieldNumber ... StateManager uses this method to ask the instance to provide the values of the multiple fields identified by
0

javax.jdo.Query

) to identify that the created query should obey the JDOQL syntax and semantic rules. The string constant used as the first argument to PersistenceManager.newQuery(String,Object) to identify that the created ... to PersistenceManager.newQuery(String,Object) to identify that the created query should use SQL semantics. The string

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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