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What are the main benefits of using ObjectDB?

fields can be stored by ObjectDB simply as part of the containing object. Relational databases lack

ORDER BY clause (JPQL / Criteria API)

is always the last in the query processing chain. If a query contains both an ORDER BY clause

JPA Annotations for Java EE

The following JPA annotations are in use to integrate JPA into a Java EE application and are managed by the Java EE container:

JPA Queries

query string (i.e. to a String instance containing JPQL). An essential interface for using

JPA Miscellaneous

This section contains miscellaneous JPA types. The PersistenceUtil and PersistenceUnitUtil interfaces provide general utility methods: The Cache interface and the CacheRetrieveMode and CacheStoreMode enum types serve in managing the EntityManagerFactory's shared (level 2) cache: Other enum types are provided for setting of various JPA operations:

Server Configuration

The <server> configuration element specifies settings for running an ObjectDB Server. The server is affected also by other elements in the configuration file, particularly the <users> and the <ssl> configuration elements. The default configuration file contains the following <server> element

Entity Management Settings

The <entities> configuration element specifies front end settings that are relevant on the client side and in embedded mode. The default configuration file contains the following <entities> element: <entities> <enhancement agent="true" reflection="warning" /> <cache ref="weak" level2="0mb

Retrieving JPA Entity Objects

the example above, the Employee entity class contains an address field that references an instance

Spring MVC JPA Tutorial - Maven Project

should be guestbook-spring (containing the pom.xml file), and port 8080 has to be available

Step 5: Add a JSP Page

> </body> </html> The JSP generates the guestbook page output, which contains a simple form

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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