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Composite indexes

that returns the smallest subset of unique records (like for example "isPublished" which is either true ... member in many @Indexes? Something like that : @Index(members = { "lastModificationDate


to handle the optimistic lock by manually refreshing each object? if so, it seems like a huge ... me. Pessimistic locks might not help either, given #3 above, ie: it seems like last update wins, and changes

OutOfMemoryError on search after update on DB created with DB Doctor

It looks like there may be an issue with the DB files created with DB Doctor in recovery mode. This is the scenario that results in the OutOfMemory exception problem (using Object DB 2.5.4_04): 1 ... may be and how we can avoid it. I would like this opportunity to suggest to you to modify DB Doctor

significant performance decrease

execution time. support Support Object class is defined like this (indexes are defined): @Entity ... -MILLING') and o.type = 0 Time for query like this (400000 ObjectNode instances, database size

How to define Default Entity Listeners without persistence.xml and orm.xml

I am using JPA programaticaly..ie without xml file, and i would like to define Default Entity Listeners. How to do ? Here my init code: Properties config = new Properties(); config.put("javax ... ). support Support Is there a way using em.getDelegate() and then using objectdb api ? I would like

EmbeddedId with Generated field value

annotation @GeneratedValue like the following: Solution 1) class A { @Id @GeneratedValue private long ... class with annotated fields? I believe declaring it like the following should be the same: public

Homepage and forum nearly inaccessible

, please report. Thanks! support Support It is still very slow, and it has been like that for 1 year ... the attachment. zmirc Mircea Chirac I would just like to confirm that as of May 19 22:00 the site

Exception in thread "ODB-StoreHandler-5094" java.lang.NullPointerException

like ObjectDb is not catching all Exceptions, allowing them to bubble up into the wrapper ... code. NullPointerExceptions are very concerning and we would like to ensure that no corruption

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

because it appears to be either database integrity corruption, or it just looks like ... carefully that its fields (such as name) are null, it is in fact a broken Project object (or looks like

several times a day queries take several minutes

we have queries like (see the database that we handed over to you for other issues) select distinct o from ObjectNode o join o.properties p1 join o.properties p2 where o.classIdentifier = "(OP ... . Our system has a load of around 400 concurrent webSocket connections that normally only query (without updates, like

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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