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9

JPA Metamodel API

to support an ID class when using multiple ID fields or properties. Finally, the EntityType interface
9

Database Replication and Clustering

ObjectDB supports master-slave replication (cluster). When replication (or clustering) is used, the same database is managed on multiple machines (nodes), possibly in different geographic locations. This could help in achieving high availability, fault tolerance and prompt disaster recovery. In
9

JPA Named Queries

", query="SELECT c FROM Country c") public class Country { ... } Attaching multiple named
9

JPA Query Expressions (JPQL / Criteria)

: * (multiplication), / (division), + (addition) and - (subtraction). Comparison operators
0

javax.jdo.spi.PersistenceCapable

unambiguous identification of the field to be marked dirty. If multiple classes declare the same field ... StateManager uses this method to ask the instance to provide the values of the multiple fields identified by ... of the multiple fields identified by fieldNumbers. Parameters: fieldNumbers - the fields whose values
0

javax.jdo.Query

with a PersistenceManager. Multiple queries might be executed simultaneously by different threads ... of the subquery execution. If the same value of variableDeclaration is used to add multiple subqueries ... (Map extensions) Set multiple extensions, or use null to clear all extensions. Set multiple extensions
0

javax.jdo.JDOUserCallbackException

[] getNestedExceptions() The exception may have been caused by multiple exceptions in the runtime. The exception may have been caused by multiple exceptions in the runtime. If multiple objects caused
0

javax.jdo.JDOReadOnlyException

JDK1.0 Throwable[] getNestedExceptions() The exception may have been caused by multiple exceptions in the runtime. The exception may have been caused by multiple exceptions in the runtime. If multiple
0

javax.jdo.JDOCanRetryException

.0 Throwable[] getNestedExceptions() The exception may have been caused by multiple exceptions in the runtime. The exception may have been caused by multiple exceptions in the runtime. If multiple
0

javax.jdo.JDODetachedFieldAccessException

[] getNestedExceptions() The exception may have been caused by multiple exceptions in the runtime. The exception may have been caused by multiple exceptions in the runtime. If multiple objects caused

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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