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Failover from Master to Slave

discussions and solutions: https://stackoverflow.com/questions/9957179/jpa-dynamic-persistence-unit-name https://stackoverflow.com/questions/8784302/dynamic-persistencecontext-unitname-attribute

DB Explorer and Doctor unable to open DB file

.objectdb.o.UserException: Failed to generate dynamic type quant.phdsc_new.placement_builder.data ... ) ... 17 more [ObjectDB 2.5.6_05] Failed to generate dynamic type quant.phdsc_new.placement_builder

Custom Classloader: Issues with the Enhancer Agent

In my use case I generate some classes dynamically and load them with a custom classloader. The classloader is very standard and does something like this (simplified): public class ... (note: it may be a different class loader than the one that you implement for the dynamic classes

JRebel integration feature

Feature request: Dynamic class enhancement during development compatible with JRebel. dmoshal David Moshal ObjectDB 2 supports dynamic enhancement using a Java Agent. Please try it and see if it is compatible with JRebel. support Support I would like to support this ambitious feature request. I

best practice for DB recovery

to recover from a failed instance would be to simply stop all writing, take a backup from the working instance(that will make sure all transactions are committed) and then copy the backup to the failed

JPA Query Criteria API (JPA 2.0)

The JPA Criteria API supports dynamic definition of JPQL queries using CriteriaBuilder as a factory. ObjectDB supports dynamic definition of JPQL queries as strings. Support of the new JPA 2 Criteria API in expected in future versions. support Support Implementation of the JPA Criteria Query API

Database access error , Doctor hanging on trying to repair, production shutdown at our biggest customer

. Another thing that you can do is frequent online backups followed by a Doctor check of the backup files

ObjectDB 2.6.3

Added an option to disable some query execution optimizations. Added an option to exclude persistence aware enhancement (feature request #1683). Added an option to use temporary files for very large transactions (feature request #1658). Fixed an online backup bug (no access during backup operation

[ObjectDB 2.6.9] Unexpected exception (Error 990)

.. version 2.5.6_05 - size of data 100GB I am running a Doctor in prod (in a backup file, It takes long ... ve been migrated. New database copy is ready at: backup\201703291624\pcsodbcsv_new.odb jastorga

again merger missing logs + objectdb exception

above. Please run the Doctor of the new version (2.7.2) to repair the database. If you have a daily backup ... (or generated backups) and report any errors except the expected broken references error. support

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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