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Sample JDO Architecture for Follow Up Questions

I am trying to finalize on my application's JDO and ObjectDB archieture.  I have done documentation survey (reading JDO books, studying ObjectDB's documents and forum) and have designed what I think is the best architecture for my particular application usage model. #1 2016-07-25 15:26 I am trying to finalize on my application's JDO and ObjectDB archieture.  I have done documentation surv ...

 
manual

[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... is true are included in the result collection. If an index is defined for the age field (see section 4.5 ), iteration over ...

 
release

2.0.3

Release date: 2010-12-13 Download (3.4 MB) Binary:  objectdb-2.0.3.zip ObjectDB 2 is already in use in production in several applications and is m ...

 
forum_thread

Out of memory

Hi, Today in the middle of the night ODB just crashed leaving this on console screen: ... ------------------- [ 1 ] Unexpected last index ID: 3624386649387068524 ( expected -317 ) [ 2 ] ...

 
release

2.0.2

Release date: 2010-11-13 Download (3.39 MB) Binary:  objectdb-2.0.2.zip ObjectDB 2 is already in use in production in several applications and is ...

 
forum_thread

slow performance for a complex query

Hi, We have a query that is constructed dynamically, an example is like this: SELECT DISTINCT $1 FROM CDI $1, Organisation $2, Organisation $3 WHERE ((UPPER($1.cdiId) LIKE 'THREAD14%') AND ((($1.parentOrgId='news') OR (($1.parentOrgId=$2.organisationId) AND ($2.parentOrgId='news'))) OR ((($1.parentOrgId=$3.organisationId) AND ($3.parentOrgId=$2.organisationId)) AND ($2.parentOrgId='news')))) I've also tried running the CDI query first and passing the results into the organisation query as follows: #1 2012-02-16 09:16 Hi, We have a query that is constructed dynamically, an example is like this: SELECT DISTINC ...

 
api-jdo

javax.jdo.Query

The Query interface allows applications to obtain persistent instances, values, and aggregate data from the data store.(Interface of JDO)

 
forum_thread

Occasionally slow requests in load testing

We are running load testing against objectdb version 2.3.7_18. The performance is generally OK, however there are quite a few "spikes" in the performance where we are getting a lot of very slow response times from the DB, around 10 - 15 seconds. Looking at the DB server process with AppDynamics we can see that most of the requests get stuck in one of 2 places: com.objectdb.o.PGC:w: line number 232 com.objectdb.o.LFL:U: line number 1068 Please see the attached callgraph examples for full stack trace examples. ... Check the active query. Maybe you have to define a new index or rephrase that query. If the query requires scanning of the entire ...

 
forum_thread

Weird behaviour with enhanced classes and embedded entities

Hi, I've found some weird behaviour in my project (www.tinymediamanager.org): Sometimes some entries of my ArrayLists with embedded entities are missing. I've hunted the problem down to an enhanced/proxied list in my entity which contains embedded entities and some .add(obj) are simply failing. Here is a small sscce which reproduces the issue: ... System. out . println ( "Not added index " + i + " in Thread " + id ) ; } ...

 
issue

Unexpected exception (Error 990)

Exception is thrown on commiting a transaction using this code: transaction.begin(); try { repository.setStatus(ImportStatusFlag.RUNNING_IMPORT); repository.setImportProgressMessage("Importing..."); //$NON-NLS-1$ repository.setImportProgressPercent(0); transaction.commit(); } finally { if (transaction.isActive()) { transaction.rollback(); } } "repository" is a Entity in database. Stracktrace as follows:   ... unexpectedly fails to locate a type in order to update an index. Did you get this exception after changing the schema? If ...