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53

use of Singleton into tomcat

hi all. i would write a class singleton that encapsulate the entitymanagerFACTORY into ... a Ejb!!!!!!!!!). into tomcat it not possible use ejbs............. i have to manage the concurrency ... of singleton for manage all operation on database. I get a instance of it into multiple servlet. but into
51

@Unique added afterward is not taken into account

Hello, I encounter an issue with the @Unique annotation. The annotation was added on a given field itemID (String), important point : the annotation was added afterwards (after objects were already added to the table). As a consequence the unique constraint is not taken into account when persisting
51

Finance data from SQL Server into ObjectDB daily

? Is there a way to map the structure of the table directly into ObjectDB from SQL Server? Thanks. ExpII
51

Error 613 - i cant put a list<Athlete> into a Squad object

Athlete structure and it works, but if i want to extend my program with putting the Athletes into
51

RT Java application recording into 100DB run OOM after a few hours.

Hi, I am running a java application that records data from 100 feeds into 100 different database - this is done is one thread. It works fine several hours - and suddenly i got an out of memory issue (I checked there is no leak in java - I cleared the entity manager every 10 new entity) - I run
51

how to persist an object twice into two diff. collections of two diff. classes

ok my problem, i persist a Squad Object into a Cup Object at the beginning, after i have to create and persist a competition object in which i have to put some of the already created/persisted squads. the final method looks like that: public void actionPerformed(ActionEvent e) { List<Squad
51

Integrating the ObjectDB logging into the application logging based on slf4j

We would like to write the logs of ObjectDB with into the log of our application. What do you use for logging? With or without slf4j and if so, what concrete implementation? Do you see a way to combine your logging with our logging? btc_es BTC EmbeddedSystems The ObjectDB logging is based
49

Need to close+open database for a commit to be taken into account

Need to close+open database for a commit to be taken into account
49

Insertion Speed Rate and Batch Load

1. I got about 10K inserts / second, is it normal? I would expect more than that, like close to 100K/second. I can definitely do 80K inserts/seconds on Oracle with batch insert on table with one primary key. 2. Is batch update/insert operation supported? I attached the files. edy_at_ssn Edy Oey
47

Insert time increases as db grows.

Hello, I've just installed ObjectDB and done some tests. I'm inserting 22k of records like 10k ... have index on String column. Entities are not enhanced and inserts are committed in a separate ... ; then 11 seconds and so on. Should I change my config in some way to get more stable insertion time

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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