About fast

forum_thread

Geospatial functions

Hi, is it possible to implement geospatial functions (e.g. calculating distance between too points given latitude/longitude) ?Normally you would calculate the distance like: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
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Run out of memory

Hi, I've been looking into ObjectDB for our use, where everything has been great apart from I'm stuck on the following problem.   I am trying to load a large file (> 1GB), process certain information and store it back in the database to access / modify later. I require to be able to rollback changes as well, where there can be massive amount of changes.   ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
forum_thread

A few questions on object database design

I've been trying to model a database that stores data in an MMORPG. With ObjectDB, a lot of things are easier to perform. Intuitively, I created an entity class called player and stored everything about the player as embeddable classes. However, my colleague questions about this structure, since we would be looking at persisting data from the server every minute or two per player. He has stability issues with the ObjectDB if we are accessing the same table all the time.... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
issue

InternalException: null

Hi! when I run my application where 10 threads are concurrently accessing ObjectDB (only reading) via using ExecutorService, then these 2 mistakes are coming rapidly: 1. ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
issue

InternalException caused by OOM: Metaspace

Our java server app using objectDB threw this mistake. Looks like due to OutOfMemory exception, but the app was running with -Xmx12G and before the mistake there was used 1,6G from that heap. Although Metaspace can happen independently on the heap usage I believe. Stacktrace follows: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
issue

[ObjectDB 2.5.1_05] Unexpected exception (Error 990)

I have this error in log. The query can't return result. Thanks for help. LOG: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
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com.objectdb.o.InternalException: Unexpected internal exception

Hi, I am using objectdb.jar version 2.6.8 (installed via Maven). I am trying to authenticate a user. Initially, the database is empty. I have the following query: @javax.persistence.NamedQuery(   name = "getPersonByName",   query = "SELECT _person FROM metamodel.user.Person as _person WHERE _person.userName = :userName" ) I execute the query as follows: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
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Opensource ObjectDB

I know you have answered this question some years ago, but I think about the databases that have recently "triumphed" like MySQL, MongoDB or SQLite and they are free databases. Also in the Java world we have the example of Hibernate (ORM) and Apache Hadoop (framework for Big Data). ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
issue

Unexpected exception (Error 990) - Merge with no Transaction

I am frequently having an error when merging a detached object outside of a transaction. (Is this allowed? I am not trying to modify the object, just read data from it.) Here is a test case: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
issue

com.objectdb.o.InternalException: java.lang.ArrayIndexOutOfBoundsException: null

Exception in thread "main" [ObjectDB 2.6.0_04] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.7.0_51 (on Windows 7 6.1). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: java.lang.ArrayIndexOutOfBoundsException: null java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method) at com.objectdb.o.SEM.c(SEM.java:77) at com.objectdb.o.SEC.g(SEC.java:196) at com.objectdb.o.SEC.c(SEC.java:84)... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...