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51

First query before any of the object has been stored

I have some code that, before writing an object via ObjectDB makes a query to ensure the new object is different from what's already stored. The problem is that, before any instances of that object ... other persistence related exception. How can I know if any of an object has been stored
51

Performance with large databases

significantly by a larger database. support Support Is fetching an object by the id faster ... When populating a large database (10s of GBs) performance drops suddenly at a certain time whenever I run the populating application. Is there typically a database size when indexes can no longer
51

Using the wrong class to access a database

the Point database described in the Getting Started section: package com.objectdb.tutorial ... if I can access the database from here. This program is almost the same as the first; it only calls ... are working fine, but the third ruins the database: - The number of entries is zero. - running the app
50

internal object DB locking in an embedded multi threaded application

to how we can improve / elviate this? our database files are between 100 and 500 meg when this occurs. It doesnt ... database file resizing. You may try avoiding file resizing by setting relevant configuration (mainly the initial database size). support Support If no conf file is found or provided
50

Example database world.odb

database to the standard output in JSON format. You will need google-gson in order to run it. support Support Thanks a lot! How to save to World database persistent objects that describes ... Hello! Where can I find classes for example database world.odb? Thanks for the answer. Robin_2005
10

Chapter 1 - Quick Tour

on how to start using JPA in your IDE with the ObjectDB object database. Given the simplicity of ObjectDB, that should be quick and easy even for a novice. ... ObjectDB databases and perform basic CRUD operations (Create/Store, Retrieve, Update and Delete) on ObjectDB databases. The example program that this chapter presents manages a simple database
10

Database File Compression

ObjectDB database files are usually smaller than database files of other Database Management Systems (object databases and relational databases) but additional internal compression is still possible ... . So the effect of using compressed ObjectDB database file on performance is unknown yet. support Support
10

[Explorer] Editing Database Files

databases in a read only mode. The Explorer should support creating and storing new database objects and editing and updating existing database objects, visually, with no code. This is one of the features ... Support Editing databases in the Explorer is now supported by ObjectDB 2.3. support Support
2

Step 3: Define a Spring DAO Component

Operations on the database will be performed by an instance of a Data Access Object (DAO ... - for storing a new Guest entity object in the database. getAllGuests - for retrieving all the existing Guest objects from the database. By using Spring components we can move some work from
2

Step 3: Define a Spring DAO Component

Operations on the database will be performed by an instance of a Data Access Object (DAO ... Guest entity object in the database. getAllGuests - for retrieving all the existing Guest objects ... .annotation.Transactional; @Component public class GuestDao { // Injected database connection

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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