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About injection

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Tutorial
79

Step 3: Define a Spring DAO Component

.transaction.annotation.Transactional; @Component public class GuestDao { // Injected database ... the instantiation of the DAO component class and injects an instance of the DAO component class into the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em
Tutorial
79

Step 3: Define a Spring DAO Component

.annotation.Transactional; @Component public class GuestDao { // Injected database connection ... component class and injects an instance of the DAO component class into the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em field
Tutorial
79

Step 3: Define an EJB Session Bean

class GuestDao { // Injected database connection: @PersistenceContext private EntityManager ... of the EJB class and injects an instance of the EJB class into the servlet (as shown in the next step). Prepares an EntityManager automatically and injects it into the em field (because it is annotated
Tutorial
79

Step 3: Define an EJB Session Bean

; @Stateless public class GuestDao { // Injected database connection ... : Manages the instantiation of the EJB class and injects an instance of the EJB class into the servlet (as shown in the next step). Prepares an EntityManager automatically and injects it into the em field
Forum
36

TemporalType injection with Calendar using JPA

TemporalType injection with Calendar using JPA
Tutorial
26

Step 4: Add a Servlet Class

; // Injected DAO EJB: @EJB GuestDao guestDao; @Override protected void doGet ... session bean, which is instantiated and injected by the application server into the guestDao field
Tutorial
26

Step 4: Add a Servlet Class

final long serialVersionUID = 1L; // Injected DAO EJB: @EJB GuestDao guestDao ... on the database are carried on by the GuestDao session bean, which is instantiated and injected by
Manual
18

JPA Entity Fields

; } If a version field exists, ObjectDB automatically injects the version value into that field. Version fields
Manual
18

JPA Primary Key

is defined the primary key value is automatically injected into that field by ObjectDB
Result
18

ObjectDB Object Database Features

Automatic object versioning (can be injected to a @Version field). Optimistic locking (always active