6 | Chapter 3 - Using JPAThis chapter explains how to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and concepts: The next section explains how to use JPA for database CRUD operations: More advanced topics (e.g. locking and events) are discussed in the last section: |
6 | Server User List") specifies if the user is a superuser. A superuser is authorized to manage server settings using |
6 | General Settings and Logging-history size="50" user="true" password="true" /> ObjectDB manages a list of the recently accessed |
6 | Criteria Query From Elements Fetch Elements Join Fetch is managed in criteria queries by the following interfaces: See the FROM in Criteria Queries section for more details and an example. |
1 | Step 4: Add a Servlet ClassIn this step we will add a servlet to manage guestbook web requests: Open the [New Servlet] dialog box by right clicking the guest package node (in the [Projects] window) and selecting New > Servlet... Enter GuestServlet as the class name - use exactly that case sensitive class name. The Java |
1 | Step 2: Define a JPA Entity Class is adding a context listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database. |
1 | Step 3: Add a Context Listener Class and the database - when the application stops (contextDestroyed). The next step is adding a servlet class that will manage the guestbook page. |
1 | Step 3: Define an EJB Session Bean: Manages the instantiation of the EJB class and injects an instance of the EJB class into the servlet (as |
1 | Step 4: Add a Servlet ClassIn this step we will add a servlet to manage guestbook web requests: Open the [Create Servlet] dialog box by right clicking the guest package node (in the [Package Explorer] window), selecting New > Other... > Web > Servlet and clicking Next. The Java package name should be guest. Enter |
1 | Step 4: Add a Servlet ClassIn this step we will add a servlet to manage guestbook web requests: Open the [New Servlet] dialog box by right clicking the guest package node (in the [Projects] window) and selecting New > Servlet... Enter GuestServlet as the class name - use exactly that case sensitive class name. The Java |
