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Spring MVC Errors

: "To enable on the fly automatic enhancement (weaving) in Tomcat it has to be run with ObjectDB as a Java agent (javaagent:objectdb.jar). When using GlassFish - on the fly enhancement (weaving ... configuration: org.codehaus.mojo:exec-maven-plugin:1.2:java (execution: enhance, phase: process

DB reading fails in debug mode in Eclipse

) enhancement rather than on the fly enhancement. support Support ... Gergely Jakab The stack trace may indicate an incomplete enhancement. Try full clean build of your project with full enhancement of all your classes (particularly all persistence capable classes

NullPointerException in __odbGetNumMember

other related classes (e.g. a super class) are not enhanced. If you enhance classes on the fly ... of the enhanced Mitglied class. I am unable to replicate it in a simple testcase but it always happens in ... value of field field version using enhanced method version is annotated with @Version quasado Alexander

ObjectDB 2.8 Developer's Guide

ObjectDB Tools: the Explorer, the Enhancer, the Doctor, etc. Describes the ObjectDB configuration

FROM clause (JPQL / Criteria API)

The FROM clause declares query identification variables that represent iteration over objects in the database. A query identification variable is similar to a variable of a Java enhanced for loop in a program, since both are used for iteration over objects. Range Variables Range variables are query

JPA Entity Fields

3) unless either the entity class is enhanced (explained in chapter 5) or a version field

Running JPA Queries

an enhanced for loop: for (Country c : results) { System.out.println(c.getName()); } Note

database corrupt

" /> <extensions drop="temp,tmp" /> </database> <entities> <enhancement agent="false" reflection="warning ... more information if needed. the 'on the fly' Doctor would be great for such sensible applications

JDO Annotations for Classes

JDO supports two modes of persistable classes that can be set by the following annotations: Non persistable classes that should be enhanced (because of accessing persistent fields of other classes directly) can be marked with: The identity mode of persistence capable classes can be specified by using:


PersistenceManager, object identity, and version if it has one. In the Reference Implementation, the JDO Enhancer ... environment. The Reference Enhancer also adds code to implement the methods defined by PersistenceCapable ... has been enhanced to call the jdoStateManager on read if the jdoFlags setting is not READ_OK or READ_WRITE_OK

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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