About entities

forum_thread

Cache usage

after a runtime of several weeks we are now analyzing the usage of the cache and so on. Looking at the heap dump we suspect that the cache is really used (see heap dump attached), the RAM allocated by objectdb is much less than we would expect. The database file has around 25 GByte of size and there is heavy traffic of around 400 clients communicating permanently via webSockets to the objectdb. The config is attached as well. The question is: is the cache really used ? #1 2017-03-22 18:10 after a runtime of several weeks we are now analyzing the usage of the cache and so on. Looking at the heap dump ...

 
forum_thread

IMK Stall with certain query

Hello, I am experiencing constant IMK Stall notifications from Java when using certain query: 2015-09-01 16:53:15.785 java[3678:5217999] IMK Stall detected, *please Report* your user scenario in <rdar://problem/16792073> - (imkxpc_deadKeyStateWithReply:) block performed very slowly (4.63 secs) i am sure it is linked with objectdb as these are thrown each time one particular query is used: ... OK, yes quantity is very large, these entities have too many fields and yet worst contains many strings. Primary Key ...

 
forum_thread

zip file or JAR manifest missing

I found the message: Error opening zip file or JAR manifest missing: /E:/projects/ObjectDB/bin/objectdb.jar Some of projects can read the DB, but others can not read or write the DB. #1 2011-06-28 15:38 I found the message: Error opening zip file or JAR manifest missing : / E :/ projects / Obje ...

 
forum_thread

Custom collection types

Hi   In our project in few places there are used collections from emf framework eg EcoreEMap http://download.eclipse.org/modeling/emf/emf/javadoc/2.5.0/org/eclipse/emf/ecore/util/EcoreEMap.html This is strange map for me, it implements List interface but does not implement Map interface, nevertheless it causes some questions. #1 2011-08-23 11:35 Hi   In our project in few places there are used collections from emf framework eg EcoreEMap http:// ...

 
issue

JDO PersistenceManager.getSequence() returns null sometimes

When using JDO without annotations, database sequences are normally defined in the ORM file. Following discussion on the forum I was told that ObjectDB supports sequences if specified in the JDO file. Unfortunately, it doesn't seem to be supported consistently. It appears to work only in the situation that a new odb file has just been created AND something has been persisted to it. If nothing has yet been persisted, or if the odb file is not newly created, getSequence() returns null. Code to reproduce: Bug Version: 2.4.7 Priority: Normal Status: Fixed Replies: 5 Type:  Bug ...

 
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) Bug Version: 2.6.1 Priority: Low Status: Active Replies: 1 Type:  Bug ...

 
forum_thread

Possible issue with LAZY Loading

Hi, We need lazy loading for one of our large data sets. When I run currently against both 2.4.2 and 2.4.3_01 the db is always returning everything, including the data marked as Fetch.LAZY.  I wrote the attached unit test, and then found this: http://www.objectdb.com/database/forum/9 As far as I can tell, my unit test is pretty much identical. Not sure why this doesn't work. Thanks Paul. #1 2012-09-13 01:43 Hi, We need lazy loading for one of our large data sets. When I run currently against both 2.4.2 and 2.4. ...

 
forum_thread

Spring 4 setup

Can someone provide an example of setup ObjectDB embeded to be used with Spring4? Existing examples is like for Spring3 and I can't figure how to use ObjecDB in Spring tutorial: http://spring.io/guides/gs/accessing-data-jpa/   Thanx. #1 2014-09-20 10:26 Can someone provide an example of setup ObjectDB embeded to be used with Spring4? Existing examples is l ...

 
forum_thread

String Encoding Issue

Hi all Encounter a character encoding issue when i try to retrieve a String column containing Chinese character. Retrieve a String column on odb file.  em = emf.createEntityManager(); Query query = em.createQuery("SELECT fu FROM FarmUnit fu"); But, when try to print the value out as: #1 2011-06-23 04:30 Hi all Encounter a character encoding issue when i try to retrieve a String column containing Chinese cha ...

 
forum_thread

Internationalization

What would be a good way to implement internationalization with ObjectDB? Let's say we do have a product catalog and we need to provide category and product data internationally. With a relational database we most probably would have two tables, one for locale neutral information, i.e. Product with fields SKU, price, etc. and another one for locale information only, i.e. ProductLocale with fields name, description, etc. ... for each locale, but it may be more efficient to have entities as values in this map (rather than string values), since it will ...