File: Employee.java
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
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: EmployeeService.java
import java.util.Date;
import javax.annotation.Resource;
import javax.ejb.Stateless;
import javax.ejb.Timeout;
@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
@Resource
javax.ejb.TimerService timerService;
public EmployeeService() {
}
public void doAction() {
String item = "item 1";
for (Object obj : timerService.getTimers()) {
javax.ejb.Timer timer = (javax.ejb.Timer) obj;
String scheduled = (String) timer.getInfo();
if (scheduled.equals(item)) {
timer.cancel();
}
}
timerService.createTimer(new Date(System.currentTimeMillis() + 1000), item);
}
@Timeout
public void maintenance(javax.ejb.Timer timer) {
System.out.println("TIMEOUT METHOD CALLED");
String scheduled = (String) timer.getInfo();
System.out.println(scheduled);
}
}
File: EmployeeServiceLocal.java
import java.util.Collection;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
public void doAction();
}
File: EmployeeServiceRemote.java
import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
public void doAction();
}
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 java.util.Date;
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("EmployeeService/remote");
service.doAction();
}
}
EJB-UseTimerService.zip( 4,488 k)