Java by API/javax.ejb/EJB
javax.ejb.EJB
<source lang="java">
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 javax.ejb.EJB; import javax.ejb.Stateless; @Stateless public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
public EmployeeService() { } @EJB private EmployeeServiceLocal processPayment; public void doAction() { System.out.println("do Action"); processPayment.doAnother(); }
public void doAnother() { System.out.println("do another"); }
}
File: EmployeeServiceLocal.java
import java.util.Collection; import javax.ejb.Local; @Local public interface EmployeeServiceLocal {
public void doAction(); public void doAnother();
}
File: EmployeeServiceRemote.java
import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
public void doAction(); public void doAnother();
}
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(); }
}
</source>