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Database Explorer

directory a path to it has to be specified. Alternatively, you can run the Explorer by double clicking explorer.jar or by running explorer.exe (on Windows) or explorer.sh (on Unix/Linux, after editing ... . Recently used databases can also be opened using the File > Recent Connections command. By default

Retrieving JPA Entity Objects

of entity classes and to keep them as simple as possible. Retrieval by Class and Primary Key Every entity object can be uniquely identified and retrieved by the combination of its class and its primary key ... method except that if the entity object is not already managed by the EntityManager a hollow object

Database Management Settings

. The resize attribute specifies the size by which to extend the database file when additional space is needed. Small initial size and resize values save space. Larger values can improve performance by ... ="128mb" /> When enabled, a recovery file is created by ObjectDB when a database is opened and deleted

Apache License, Version 2.0, January 2004

the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright ... and all other entities that control, are controlled by, or are under common control with that entity

Privacy Policy

the Service. By using the Service, You agree to the collection and use of information in accordance ... on Your computer, mobile device or any other device by a website, containing the details ... on behalf of the Company. It refers to third-party companies or individuals employed by the Company

Locking in JPA

update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is automatically increased by one. Version numbers are managed internally but can be exposed by defining a version

JDO Annotations for Fetch Settings

The following annotations are used to define JDO fetch groups and fetch plans:

JDO Annotations

JDO defines dozens of annotations that can be divided into the following groups:

[ODB1] Chapter 8 - ObjectDB Server

An ObjectDB server can manage one or more databases. Databases that are managed by a server can be accessed by multiple processes simultaneously. In addition, the server supports accessing these databases from remote machines by TCP/IP. More details about client server mode vs. embedded database


) and the active fetch groups determine the scope of fetching for the graph of instances reachable from the pcs parameter. The state of fields in the affected instances is as specified by the FetchPlan ... instances must either be in the default-fetch-group, or in the current custom FetchPlan. Parameters: pcs

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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