About Object Database

forum_thread

Storing Images and Object Pooling

Hello we have heard your product and we will plan to use your product on image database. Is it good to use ObjectDB as image database? Image database just screenshots of desktops.   2- ) On JPA as we know getting Result list returns ArrayList         List<SomeClass> xxx = query.getResultList(); ... your product and we will plan to use your product on image database. Is it good to use ObjectDB as image database? Image ... ) slows apps i think. I think it will be good if you make object pooling for every class.We dont know about your codes but i think it ...

 
release

2.7.0

... 2.7.0 Extended maximum supported entity object size to nearly 2GB. Added a temporary system property to ... Version 2.6.4 Added memory only database mode. Added an option to cascade detachment to ...

 
release

2.7.1

... 2.7.1 Fixed a critical bug that may cause database corruption ( issue #288 ). Improved error messages on ... 2.7.0 Extended maximum supported entity object size to nearly 2GB. Added a temporary system property to ...

 
forum_thread

Database(*.odb) file size on disk

Hello, we have questions about the file size of ObjectDB database on disk. Can you tell us something about how the deleting of entities affects the size of *.odb files on disk? -Will the released memory always used by new entities? -Will be the database file automatically reduced?   We have created a small test, in which we create and delete entities. It looks like that the released memory are reused but the the file not resized. The database is at the end empty again, but larger than the initial size. ... we have questions about the file size of ObjectDB database on disk. Can you tell us something about how the deleting of ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
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Example database world.odb

Hello! Where can I find classes for example database world.odb? Thanks for the answer.   ... Hello! Where can I find classes for example database world.odb? Thanks for the answer.   ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
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Database absolute filepath

Is there a line of code that can be used to print out my databases absolute path? I have set it as follows: EntityManagerFactory emf = Persistence.createEntityManagerFactory("$objectdb/database/people.odb"); However, the data being shown in *\lib\objectdb\database\people.odb* is different than what is being used in the rest of the application so I think there might be more than one database somehow.... . createEntityManagerFactory ( "$objectdb/database/people.odb" ) ; However, the data being shown in ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
manual

SELECT clause (JPQL / Criteria API)

Explains how to use the SELECT clause and projections in a JPA/JPQL query.... objects, including transparent navigation to other database objects, transparent update detection , support for delete , ... the following query returns a managed City entity object: SELECT c . capital FROM Country AS c WHERE c ...

 
forum_thread

GWT RPC is throwing serialization exception when I have object db date value

Caused by: com.google.gwt.user.client.rpc.SerializationException: Type 'objectdb.java.util.Date' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.: instance = Sat Jan 29 00:00:00 PST 2011    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:614)  ... can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Performance with large databases

When populating a large database (10s of GBs) performance drops suddenly at a certain time whenever I run the populating application.  Is there typically a database size when indexes can no longer be held fully in memory or some such issue?  The method calls that suddenly start to take the most time are those that retrieve data from the store. ... When populating a large database (10s of GBs) performance drops suddenly at a certain time whenever I ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
forum_thread

Entity listener - event instead of object

Hi, Currently I'm playing with entity listener to implement auditing with difference between values in updated entity. There is a problem however with accessing "old" version of object stored in database. I can't find the nice way to use EntityManager in EntityListener. Because of that, I can't store separate entity for given event. Right now I'm using BaseEntity which contains ... There is a problem however with accessing "old" version of object stored in database. I can't find the nice way to use EntityManager in EntityListener. ...