ObjectDB Database Search

As noted above, using ObjectDB instead of a relational database and ORM combination  ... of a relational database is mandatory (e.g. as a result of a customer request or when a new application is developed for an existing old relational database ). By using the Java Persistence API (JPA

the database . The query should be ran using the getResultList method, as we expect to receive multiple ... , which is a Long object reflecting the number of Country objects in the database : TypedQuery query = em ... . In other cases our expectation for a single object result might fail, depending on the database

side: Cache of database file pages . Cache of query programs . Cache of query execution results . The scope of these server side caches is wider, since they exist per database and are shared by all the EntityManagerFactory and EntityManager instances of the same database - including on different

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 ... , that hold the point's x and y coordinates. The program demonstrates CRUD database operations by

on which they were invoked). Flush Mode (setFlushMode) Changes made to a database using an EntityManager em can be visible ... is executed, uncommitted database changes (if any) have to be flushed to the database in order ... changes to the database before every query execution affects performance significantly

JPQL query that retrieves selective objects from the database . Out of the four optional clauses ... over all the Country objects in the database using the c range variable. Before passing these Country ... with millions of objects in the database there is a huge difference in query execution time if proper

ObjectDB is an Object Oriented Database Management System (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing ... objects (and graphs of objects) in an ObjectDB database directly. There's no need to define tables

Welcome to ObjectDB for Java/JPA Developer's Guide. Here you can learn how to develop database ... you productive with ObjectDB and JPA in a short time. Guide Structure Demonstrates basic database ... ObjectDB. hows how to use JPA to store, retrieve, update and delete database objects. Explains

subclasses of PersistenceException . For example, an attempt to update the database with no active transaction is represented by: Database update failures that require transaction rollback are represented by ... : Exceptions can also be thrown on an attempt to retrieve entity objects from the database . For example

the ObjectDB Database Management System software ("The Software"), subject to the terms and provisions ... and objects in a database file. The full edition of the Software (without the restrictions ... and only as part of the Customer's product ("The Product"). The Product is not a Database Management

EntityManager but still represent objects in the database . Compared to managed entity objects, detached ... the database unless modified detached objects are merged back into an EntityManager to become managed ... if there is no active transaction when merge is called because operations that might modify the database

The configuration element supports renaming packages, classes and fields in ObjectDB databases as ... your database files before renaming or moving persistable classes and you must verify that after such changes ... the specified schema updates every time a database is opened. When using client-server mode

number generator for every database . This number generator is used to generate automatic object IDs ... for every new entity object. These generated values are unique at the database level and are never recycled ... ). This may be useful when the primary key value is needed earlier. To minimize round trips to the database

per database file. This could be useful for small projects, academic assignments, evaluation and learning ... databases are managed, but using ObjectDB on client machines merely to access remote ObjectDB databases (for which licenses have been purchased) does not require additional separate licenses. Purchase

performance. Reducing Development Time and Costs ObjectDB makes database programming easier and faster. The ability to store ordinary objects in the database directly can simplify the code significantly ... fields can be stored by ObjectDB simply as part of the containing object. Relational databases lack

to iterate over all the Country objects in the database . For a country with no capital city, such as ... returns the number of all the entity objects in the database , excluding Country entity objects ... the database . The Country literal represents the Country entity class. The TYPE operator returns

clause. When a GROUP BY clause exists in a JPQL query, database objects (or tuples of database objects ... over all the Country objects in the database . The GROUP BY clause groups these Country objects by

ObjectDB Software develops, markets and supports the ObjectDB Object-Oriented Database Management ... ) standards, since ObjectDB is the first object oriented database with built in support of JPA and JDO ... . When database performance matters - ObjectDB Software provides the most effective solution. ObjectDB

for managed entity objects, including transparent navigation to other database objects, transparent update ... to them when a transaction is active are not propagated to the database . Multiple SELECT Expressions

Querying without indexes requires iteration over entity objects in the database one by one. This may take a significant amount of time if many entity objects have to be examined. Using proper ... but might be presented in the ObjectDB Explorer and in logging. When an entity object is stored in the database

whose name is  "Country.findAll" that retrieves all the  Country objects in the database ... of, and that includes all the entity classes that have objects in the database . However, an attempt to use a named query

Operations on the database will be performed by an instance of a session bean (EJB) class ... { // Injected database connection: @PersistenceContext private EntityManager em; // Stores a new guest ... : persist - for storing a new  Guest entity object in the database . getAllGuests

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

to store Point objects in the database and then retrieve them from the database . Use copy and paste ... a database connection // (create a new database if it doesn't exist yet): EntityManagerFactory emf ... .createEntityManager(); // Store 1000 Point objects in the database : em.getTransaction().begin(); for (int i = 0; i

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

Operations on the database will be performed by an instance of a session bean (EJB) class ... ; @Stateless public class GuestDao { // Injected database connection: @PersistenceContext private ... ) class defines two methods: persist - for storing a new Guest entity object in the database

To store objects in an ObjectDB database using JPA we need to define an entity class: Open ... objects in the database was created in the project (under Java Resources: src guest). Use copy ... + ")"; } } The Guest entity class will represents guests in the database . We also need to configure JPA by setting

The Guest entity objects will be stored in an ObjectDB database , which will be represented by ... a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or ... . The database will be closed when the web application stops (or when the web server shuts down), by

To store objects in an ObjectDB database using JPA we need to define an entity class: Open ... the [Provider and Database ] step just click Finish to generate a default persistence.xml file ... objects in the database was created in the project (under Source Packages guest). Use copy and paste

To store objects in an ObjectDB database using JPA we need to define an entity class: Right click ... the database was created in the project (under Java Resources: src/main/java guest). Use  copy ... + ")"; } } The  Guest entity class will represents guests in the database . We also need to configure JPA

the database : Right click the tutorial package in the [Package Explorer] window and select New Class ... (String[] args) { // Open a database connection // (create a new database if it doesn't exist ... = emf.createEntityManager(); // Store 1000 Point objects in the database : em.getTransaction().begin(); for (int i = 0; i

To store objects in an ObjectDB database using JPA we need to define an entity class: Open ... entity class. In the [Provider and Database ] step click Finish to generate a default persistence.xml ... objects in the database was created in the project (under Source Packages guest). Use copy and paste

To store objects in an ObjectDB database using JPA we need to define an entity class: Open ... to create the new class. The new class should represent Guest objects in the database . Use copy ... ; The new class should represent Guest objects in the database . Besides the @Entity annotation

The Guest entity objects will be stored in an ObjectDB database , which will be represented by ... a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or ... an EntityManagerFactory . The database will be closed when the web application stops (or when the web server shuts

, a new ObjectDB database file is generated in the db subdirectory under the ObjectDB installation directory. Running the application again will use the existing database file to store an additional 1,000 objects. You can view the content of the database file by opening it in the ObjectDB Explorer

This tutorial demonstrates how to create reports based on data in an ObjectDB database using ... simple as possible - we will use the basic  points.odb ObjectDB database file from the Getting Started tutorial. The database file contains 1,000 Point entity objects, which represent points

Connections to the database are represented in BIRT as data sources. To create an ObjectDB data source: Open the [New Data Source] dialog box by right clicking the Data Sources node in the [Data ... the database connection url: Download and save the points.odb   database file (from the Quick

) When you run the application for the first time, a new ObjectDB database file is generated in the db sub ... the existing database file to store an additional 1000 objects. You can view the content of the database file

entity object is constructed and stored in the database . All the Guest entity objects are retrieved from the database and stored in the request's "guest" attribute. Then the processing is forwarded ... to generate the page output. Notice that operations on the database are carried on by the 

To store objects in an ObjectDB database using JPA we need to define an entity class: Open ... on " + signingDate + ")"; } } The new class should represent Guest objects in the database ... listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database .

the database . All the Guest entity objects are retrieved from the database and stored in the request's ... on the database are carried on by the GuestDao session bean, which is instantiated and injected by

To store objects in an ObjectDB database using JPA we need to define an entity class: Right click on the project in the [Package Explorer] window and select New Class . Enter tutorial as the package ... should represent Point objects in the database . Apart from the @Entity annotation and the id field

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the tutorial package node (in the [Projects] window ... objects in the database . Besides the @Entity annotation and the id field (and its annotations

This is the NetBeans version of the  JPA Web App tutorial. It demonstrates how to create and run a database driven Java web application in NetBeans - using Tomcat 6 Apache Tomcat ... and all the Guest entity objects are stored in an ObjectDB database . Required Software For this tutorial

without specifying a Java agent. Since we are using ObjectDB in embedded mode - the database file is created under the Tomcat directory. You can stop the Tomcat server and open the database file in 

The following tutorials demonstrate how to develop database driven applications using JPA and the ObjectDB ODBMS (Object Oriented Database Management System). Console JPA Tutorial The Quick Start tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA

- the database file is created under the GlassFish directory (e.g. at domains\domain1\eclipseApps\Guestbook\WEB-INF ). You can stop the GlassFish server and open the database file in ObjectDB Explorer

- the database file is created under the Tomcat directory. You can stop the Tomcat server and open the database file in ObjectDB Explorer : This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the Manual .

The Java Data Objects (JDO) is another standard for accessing persistent data in databases , using ... ), which is designated to be used with relational databases , JDO is designated to be used with both relational and object databases . JDO is supported by many object databases , including ObjectDB

There are various ways to retrieve objects from an ObjectDB database , as shown in section 6.3 ... SQL for RDBMS. It provides object retrieval from the database according to a specified selectioPlan ... . If the query compilation succeeds, the Extent of Person instances in the database is iterated object by