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Guestbook example from tutorial does not work.

Hi, I have Problems to initialize objectdb in a jee envoirment. I used the Guestbook from the tutorial and try to deploy on Tomcat but i get this error. Caused by: org.apache.tomee.catalina.TomEERuntimeException: org.apache.openejb.OpenEJBException: Creating application failed: /objectdb-2.6.2

How to Remove records from many to many relationship tables in JPA

this to delete the records from Conclusion and TransportationEvent. Thanks in advance! lakshmi

Getting this error when fetching records from mem db.

Getting following error when executing bellow query. [2022-03-25 14:42:19 #1 query] Error during query execution: Select rt From RtDelete rt Where rt.EntityClass =: encls And rt.DeletedAt >: lastcheck({encls->RtCall,lastcheck->Fri Mar 25 14:42:14 IST 2022}) [2022-03-25 14:42:19 #2

Catching exceptions from online backup

successfully although there was an Exception in it. I attached a screenshot from the debugger. jakab Gergely

Undeploying Glassfish web application does not disconnect from ObjectDB

embedded mode? Apparently undeploying a web application from GlassFish doesn't close

Is there a way to extract the schema from an existing Database?

Hi ObjectDB, Is there a way to extract the schema from an existing Database? i.e. without using my class files Thanks EKK EKK Emmanuel Keskes The schema is available for viewing in the Explorer. You may use the JPA Metamodel API to extract it using your own code. support Support

Query debugging configuration from class

Is there a way to show what queries are actually being executed from within a Java class? I'm getting the exception: Exception in thread "main" [ObjectDB 2.5.4_05] javax.persistence.NonUniqueResultException However, I'm unable to debug it because I don't know what the query's actually searching

reading from table gives Unexpected exception

reading from table gives Unexpected exception [ObjectDB 2.6.3] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_131 (on Windows 10 10.0). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o

Why does ObjectDB duplicate classes from javax.jdo:jdo-api?

should be removed from the objectdb.jar file. When ObjectDB 2.0 was released many years ago, one appealing

Remove of an entry from a @OneToMany collection is not possible if the enhancer is disabled

Hello! When the JPA entities are not enhanced the removal of an entry from a @OneToMany collection is not possible. The following java code demonstrates the problem. The statement parentEntity.getChildEntityContainer().remove("01"); does not work correctly with not enhanced JPA entities

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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