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Setting and Tuning of JPA Queries

query time flush at the EntityManager level: em.setFlushMode(FlushModeType.AUTO); // Enable query time flush at the level of a specific query: query.setFlushMode(FlushModeType.AUTO ... query execution time in milliseconds. A QueryTimeoutException is thrown if timeout is exceeded

Eclipse Public License - v 1.0

license shall apply to the combination of the Contribution and the Program if, at the time ... such failure in a reasonable period of time after becoming aware of such noncompliance ... reserves the right to publish new versions (including revisions) of this Agreement from time to time


() Create expression to return current date. Create expression to return current date. Returns: expression for current date Since: JPA 2.0 Expression<Time> currentTime() Create expression to return current time. Create expression to return current time. Returns: expression for current time Since: JPA

Can I use ObjectDB with languages other than Java?

ObjectDB can be used by Java Virtual Machine (JVM) languages, such as Java, Groovy and Scala. It can also be used with other languages, such as Python, JavaScript, Ruby and PHP, but currently ... of ObjectDB for .NET is currently under development and future support for other languages

[ODB1] Chapter 8 - ObjectDB Server

starting the server automatically at boot time and stopping it at shutdown time, or on restarting ... inactivity time (in seconds). If a connection is inactive for more than the specified time the server

[ODB1] Chapter 4 - JDO Metadata

against the class instances. However, maintaining an extent for a class has some overhead in terms of time ... . If a default value is specified, as demonstrated by field f9, null values are replaced at storage time ... extent without indexes may take a significant amount of time because it requires iteration

[ODB1] Chapter 3 - Persistent Classes

time, e.g. an Integer, or null value. Similarly, a field whose type is one of the persistent ... a collection that contains objects of non persistent types, at storage time. As an extension to JDO ... ") becomes the new entry point at development time. First the enhancer is called, and when enhancement

[ODB1] Chapter 2 - A Quick Tour

The HelloWorld sample program manages a list of strings in the database. Each time the program is run ... have to be specified in order to run the program Main class: > java Main George Bush 57 Each time ... point at development time. It starts by enhancing necessary classes (line 8). JDO enhancement includes


control should be used for the current transaction, whether instances may hold values in the cache ... void commit() Commit the current transaction. Commit the current transaction. Throws: JDOUserException ... time. Optimistic transactions do not hold data store locks until commit time. Returns: the value

ObjectDB 1.0 Manual

and JDO in a very short time. Guide Structure The first two chapters introduce ObjectDB: Chapter 1 ... on practical issues in order to make the reader proficient in a short time. After reading this guide

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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