Inject Session Context : Injection « EJB3 « Java Tutorial





File: Employee.java

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.PostRemove;

@Entity

public class Employee implements java.io.Serializable {
  private int id;

  private String firstName;

  private String lastName;

  @Id
  @GeneratedValue
  public int getId() {
    return id;
  }


  @PostRemove
  public void postRemove()
  {
     System.out.println("@PostRemove");
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getFirstName() {
    return firstName;
  }

  public void setFirstName(String first) {
    this.firstName = first;
  }

  public String getLastName() {
    return lastName;
  }

  public void setLastName(String last) {
    this.lastName = last;
  }
}

File: EmployeeBean.java

import javax.annotation.Resource;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
import javax.ejb.Timeout;
import javax.ejb.Timer;
import javax.ejb.TimerService;

@Stateless
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
  @Resource
  private SessionContext ctx;

  public EmployeeBean() {
  }

  public Long addBid(String userId, Long itemId, Double bidPrice) {
    System.out.println("Bid for " + itemId + " received with price" + bidPrice);

    TimerService timerService = ctx.getTimerService();
    Timer timer = timerService.createTimer(123, 86400000, null);

    return 0L;
  }

  @Timeout
  public void handleTimeout(Timer timer) {
    System.out.println(" handleTimeout called.");
  }
}

File: EmployeeServiceLocal.java

import javax.ejb.Local;
import javax.jws.WebParam;

@Local
public interface EmployeeServiceLocal {
  public Long addBid(String userId,Long itemId,Double bidPrice);


}

File: EmployeeServiceRemote.java

import javax.ejb.Remote;


@Remote
public interface EmployeeServiceRemote {
  public Long addBid(String userId,Long itemId,Double bidPrice);
}

File: jndi.properties

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

File: Main.java

import javax.ejb.EJB;
import javax.naming.InitialContext;


public class Main {

  public static void main(String[] a) throws Exception {

    EmployeeServiceRemote service = null;

    // Context compEnv = (Context) new InitialContext().lookup("java:comp/env");

    // service = (HelloService)new
    // InitialContext().lookup("java:comp/env/ejb/HelloService");
    service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeBean/remote");


    service.addBid("userId",1L,0.1);
    


  }

}
  Download:  EJB-InjectSessionContext.zip( 4,488 k)










27.6.Injection
27.6.1.Inject Session Context
27.6.2.Inject EJB With EJB Annotation
27.6.3.Setter Injection
27.6.4.EJB Field Injection