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| 使用EJB参考另一个EJB组件 |
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File: AnotherBeanLocal.java
public interface AnotherBeanLocal {
public void doAnother();
}
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: EmployeeBean.java
import javax.ejb.EJB;
import javax.ejb.EJBException;
import javax.ejb.Stateless;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
@Stateless
@EJB(name = "audit", beanInterface = AnotherBeanLocal.class)
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
public EmployeeBean() {
}
public void doAction() {
System.out.println("doAction");
try {
Context ctx = new InitialContext();
AnotherBeanLocal a = (AnotherBeanLocal) ctx.lookup("java:comp/env/audit");
a.doAnother();
} catch (NamingException e) {
throw new EJBException(e);
}
}
}
File: EmployeeServiceLocal.java
import java.util.Map;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
public void doAction();
}
File: EmployeeServiceRemote.java
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void doAction();
}
File: AnotherBean.java
import javax.ejb.Stateless;
@Stateless
public class AnotherBean implements AnotherBeanLocal {
public void doAnother(){
System.out.println("from another bean");
}
}
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.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
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 EJB-UseEJBToReferenceAnotherEJBInOneEJB.zip( 4,490 k) |
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