ObjectDB Database Search

Hello, I'm a new ObjectDB user and currently working on a Java web application that's running ... application (WAR file) and deploy it from Tomcat's manager, I get a new empty database. I assume ... it: When running a new web application version, I get an exception saying this file could not be opened

New ObjectDB/JPA tutorials have been published today: Eclipse/JPA Web Application Tutorial NetBeans/JPA Web Application Tutorial The new tutorials demonstrate how to build a simple database driven web application using ObjectDB and JPA. Understanding these tutorials requires some familiarity

Hi, I read the database server section of the manual - and it looks like it is not possible to connect to a Database embedded with an application from another application - is that correct? The way to go is to have the DB server running by itself and then the 2 other applications connecting

I followed each and every step of NetBeans/JPA Web Application Tutorial but when i am trying to run the web application the following error is prompted on the run console: Start is in progress... start?path=/GuestBook FAIL - Application at context path /GuestBook could not be started C:\GuestBook

Hi,  Object are not being persisted when ObjectDB and another db is used in the same application (through spring) with different tx managers, please find an example of this below. Any help ... application and we need to decide if we are going to purchase it very soon. Many Thanks   Persistence

Hi, I am running a java application that records data from 100 feeds into 100 different database - this is done is one thread. It works fine several hours - and suddenly i got an out of memory issue ... - so it must be using the default somewhere). 2/ Using Netbeans, I profiled the application and I noticed

I'm interesting in the ObjectDB, and I want to know if it passiable run at the android application . The ObjectDB does not support other program language , but can the export an relational database models and data,when they have to change. wamdy wamdy Android is currently not supported

I don't think JDO supports altering an entity's Application Identity.  Does ObjectDB? @PersistenceCapable public class MyClass implements Serializable, Cloneable{ @Id private StringIdentity id; ... }   PersistenceManager persistenceManager = ...; Transaction transaction

It is easy to change the properties in persistence.xml file to connect to an ObjectDB server. But I could not find any reference who to connet to an embedded objectdb in a JEE/JPA application through changing persistence.xml file. Can any one please help ? buddhika75 M H B Ariyaratne Just replace

Is there a preferred way to run a client-server database so that updates from one application are immediately visible to another? The way I managed this was to run PersistenceManagerFactory.getDataStoreCache().evictAll(true,MyClass.class) to ensure that a query on MyClass would contain updated

is appropriate for most applications . The element When recovery is enabled, ObjectDB creates a recovery file

. The application can change the default mode at the EntityManager level, which applies to all queries in

of the same transaction. The application is responsible for ensuring that when an object is stored in

of the ObjectDB Manual. Query references Access named queries in the application by name or by using

( | ). Typically, the application uses only the first URL, which is the master database in

is global to the application and can be used by multiple fields across different classes. Specify

ObjectDB requires Java 8 or later. As a pure Java application , ObjectDB should be able to run on any platform that supports the Java Standard Edition. Either the Java Development Kit (JDK) or the Java Runtime Environment (JRE) can be used. A version of ObjectDB for .NET is currently under development.

and easier to use in Java applications . JPQL Query Structure Like SQL, a JPQL SELECT query consists

, and  java.sql.Time ), including HOUR , MINUTE , and SECOND . Defines component types applicable

and/or cloud hosting companies (including shared web hosting and VPS), if the hosted applications

Jakarta Persistence (JPA) provides a set of annotations to define and map native SQL queries when the standard Java Persistence Query Language (JPQL) is insufficient. While ObjectDB focuses on JPQL and ignores these annotations, they remain essential for applications interacting with relational

Jakarta Persistence (JPA) provides standard annotations to manage dependencies on container-managed persistence resources in both Jakarta EE and Spring Framework environments. They enable the container to inject EntityManager or EntityManagerFactory proxies directly into application components

the application to JPQL injection attacks. For example, suppose the name parameter is received as user input

() if necessary). From String to numeric types, including enum types (when applicable ). From any date/time type

An entity class is a user-defined class whose instances can be stored in a database. To store data in an ObjectDB database using Jakarta Persistence (JPA), you define entity classes that represent your application's data object model. This chapter contains the following sections:

Welcome to ObjectDB for Java/JPA Developer's Guide. Here you can learn how to develop database applications using ObjectDB and JPA (Java Persistence API). The main purpose of this guide is to make you productive with ObjectDB and JPA in a short time. Guide Structure Demonstrates basic database

). Therefore, ObjectDB can be used in applications that cannot use conventional non ACID NoSQL databases because of a requirement for a very high level of consistency.

( CriteriaBuilder.array ), application defined result classes  ( CriteriaBuilder.construct ), and tuples

subdirectory. However, moving objectdb.jar changes the value of $objectdb . For example, in a web application

/ embeddable classes. Avoid dependency on external libraries . Use a console application with a main

. Therefore, when a managed entity is no longer in use by the application , the garbage collector

locking should be the first choice for most applications because, compared to pessimistic locking

Jakarta Persistence (JPA) defines a hierarchy of unchecked exceptions rooted in PersistenceException to handle runtime failures. This structure enables applications to catch specific errors or manage broad persistence issues by using the base class. The exception hierarchy is as follows

? • When we perform web application reloads on our servers we observe memory leaks.  As the memory allocated to the previous web application instance is not garbage collected ... ;          The web application [CAPReportServer##000.00

A tutorial that demonstrates how to use ObjectDB in a web application should be written and added to the Tutorials section. support Support The following web tutorials are now available: JPA Web Application in Eclipse JPA Web Application in NetBeans Java EE 6 (J2EE) in Eclipse Java EE 6 (J2EE) in NetBeans support Support

. 3 .7_02. I had to upgrade to 2. 3 .7_12 to pickup the fix for wildcard search on index, and now get this. [ObjectDB 2. 3 .7_12] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_21 (on Linux 3 .0.0-16-generic). Please report this error on http://www.objectdb.com

I added the class enhancer to my build script and I get the expected output of a list with the enhanced classes. Now if I try to deploy my created application I get the following error: Caused by: java.lang.AbstractMethodError: Receiver class org.test.app.base.models.Data does not define or

the Server: Select  File Settings Application Servers . Add Tomcat 6 Server if not set already (Tomcat

a JSP page that will serve as the application view and will produce the guestbook page output.

is retrieved from the application scope attribute, and then an EntityManager (representing a database

To open and run the  JPA Web Application tutorial project in NetBeans: Download and extract the project zip file: JPA Web App - Maven Project (6KB) Open the Maven project in NetBeans: Select  File Open Project... . Select the  guestbook-web directory and click  Open

We start by creating a new NetBeans Project: Open the [New Project] dialog box, e.g. by using File New Project... Select Java Java Application and click Next . Choose a Project Name (e.g. Tutorial ). The name of the Main class should be tutorial.Main . Verify that exactly this case sensitive fully

To open and run the Java EE 6 Web Application tutorial project in Eclipse: Download and extract the project zip file: Java EE JPA Web App - Maven Project (7KB) Open the Maven project in Eclipse: Select  File Import... Maven Existing Maven Projects and click  Next . Select

" and its value is guestDao ). The next step is adding a JSP page that will serve as the application view and will produce the guestbook page output.

To open and run the  Java EE 6 Web Application tutorial project in NetBeans: Download and extract the project zip file: Java EE JPA Web App - Maven Project (7KB) Open the Maven project in NetBeans: Select  File Open Project... . Select the  guestbook-jee6 directory

To open and run the  JPA Web Application tutorial project in Eclipse: Download and extract the project zip file: JPA Web App - Maven Project (6KB) Open the Maven project in Eclipse: Select  File Import... Maven Existing Maven Projects and click  Next . Select the 

replace the content of the new jsp file with the following content: JPA Guestbook Web Application

Eclipse: Right click the project node and select Run As Java Application . Select Main - point and click OK .

on every http request: The EntityManagerFactory is retrieved from the application scope attribute

Tomcat as a server and click  OK . Note: To run the application on GlassFish - change