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2

Privacy Policy

(e.g. IP address), unique device identifiers, browser type, browser version, the time and date of Your visit, the pages of our Website that You visit and Your actions on these pages, and the time ... and to avoid You having to re-enter your preferences every time You use the Website. Analytics
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Database Server

: > java -cp objectdb.jar com.objectdb.Server If objectdb.jar is not in the current directory a path ... the & character at the end of the command line), on how to start the server automatically at boot time and stop it at shutdown time, and on how to restart the server periodically (for instance, using
2

Online Backup

on the server side). A new subdirectory with a name that reflects the current date and time (e.g ... asynchronously. Therefore, the backup query returns after the backup is started but at that time the backup
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What are the main benefits of using ObjectDB?

By using ObjectDB you can reduce development time and costs and improve your application performance. Reducing Development Time and Costs ObjectDB makes database programming easier and faster ... to shorter time to market and saving in the total development time and costs. Improving Performance
2

Index Definition

one. This may take a significant amount of time if many entity objects have to be examined. Using proper indexes ... . Index management introduces overhead in terms of maintenance time and storage space, so deciding ... , java.sql.Date, java.sql.Time, java.sql.Timestamp. Any enum type. Reference to an entity object
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JPA Primary Key

. java.lang.String. java.util.Date, java.sql.Date, java.sql.Time, java.sql.Timestamp. Any enum type ... . This is especially useful when using queries that return large result sets. As an example, consider a real time ... is represented by an Event entity object that holds time, sensor ID and additional details. Suppose
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Entity Management Settings

, even if it is not specified explicitly at the command line. This is currently an experimental feature ... during persist and later on commit or flush. Usually, commit time only cascade (which is more efficient
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General Settings and Logging

of the subsystem loggers are currently undocumented and can change at any time without notice. The supported
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javax.jdo.PersistenceManager

has no effect if the instance is already deleted in the current transaction. This method throws ... and manipulation outside of a JDO environment. When detaching instances, only fields in the current FetchPlan ... must either be in the default-fetch-group, or in the current custom FetchPlan. Parameters: pcs
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javax.jdo.spi.StateManager

- the field number currentValue - the current value of the field Returns: the new value for the field ... instance field - the field number currentValue - the current value of the field Returns: the new ... PersistenceCapable instance field - the field number currentValue - the current value of the field

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?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support