EJB Tutorial from JBoss: Callback Listener
File: CustomerCallbackListener.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.callback.bean;
import javax.persistence.PreRemove;
import javax.persistence.PostRemove;
import javax.persistence.PreUpdate;
import javax.persistence.PostUpdate;
import javax.persistence.PostLoad;
import javax.persistence.PrePersist;
import javax.persistence.PostPersist;
/**
* @author <a href="mailto:kabir.khan@jboss.org">Kabir Khan</a>
* @version $Revision: 57207 $
*/
public class CustomerCallbackListener
{
@PrePersist
public void doPrePersist(Customer customer)
{
System.out.println("doPrePersist: About to create Customer: " + customer.getFirst() + " " + customer.getLast());
}
@PostPersist
public void doPostPersist(Object customer)
{
System.out.println("doPostPersist: Created Customer: " + ((Customer)customer).getFirst() + " " + ((Customer)customer).getLast());
}
@PreRemove
public void doPreRemove(Customer customer)
{
System.out.println("doPreRemove: About to delete Customer: " + customer.getFirst() + " " + customer.getLast());
}
@PostRemove
public void doPostRemove(Customer customer)
{
System.out.println("doPostRemove: Deleted Customer: " + customer.getFirst() + " " + customer.getLast());
}
@PreUpdate
public void doPreUpdate(Customer customer)
{
System.out.println("doPreUpdate: About to update Customer: " + customer.getFirst() + " " + customer.getLast());
}
@PostUpdate
public void doPostUpdate(Customer customer)
{
System.out.println("doPostUpdate: Updated Customer: " + customer.getFirst() + " " + customer.getLast());
}
@PostLoad
public void doPostLoad(Customer customer)
{
System.out.println("doPostLoad: Loaded Customer: " + customer.getFirst() + " " + customer.getLast());
}
}
File: CustomerDAO.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.callback.bean;
import java.util.List;
public interface CustomerDAO
{
int create(String first, String last, String street, String city, String state, String zip);
Customer find(int id);
List findByLastName(String name);
void merge(Customer c);
void delete(List l);
}
File: CustomerDAOBean.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.callback.bean;
import java.util.Iterator;
import java.util.List;
import javax.interceptor.Interceptors;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
@Remote(CustomerDAO.class)
@Interceptors({LifecycleInterceptor.class})
public class CustomerDAOBean implements CustomerDAO
{
@PersistenceContext
private EntityManager manager;
public int create(String first, String last, String street, String city, String state, String zip)
{
System.out.println("-- CustomerDAOBean.create()");
Customer customer = new Customer(first, last, street, city, state, zip);
manager.persist(customer);
return customer.getId();
}
public Customer find(int id)
{
System.out.println("-- CustomerDAOBean.find()");
return manager.find(Customer.class, id);
}
public List findByLastName(String last)
{
System.out.println("-- CustomerDAOBean.findByLastName(id)");
return manager.createQuery("select c from Customer c where c.last = :last").setParameter("last", last).getResultList();
}
public void merge(Customer c)
{
System.out.println("-- CustomerDAOBean.merge()");
manager.merge(c);
}
public void delete(List l)
{
System.out.println("-- CustomerDAOBean.delete()");
for (Iterator it = l.iterator() ; it.hasNext() ; )
{
Customer c = (Customer)it.next();
manager.remove(manager.find(Customer.class, c.getId()));
}
}
// Callbacks ----------------------------------------------------------------
@PostConstruct
public void postConstructCallback()
{
System.out.println("PostConstruct - Have EntityManager: " + (manager != null));
}
@PreDestroy
public void preDestroyCallback()
{
System.out.println("PreDestory - Have EntityManager: " + (manager != null));
}
}
File: LifecycleInterceptor.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.callback.bean;
import javax.interceptor.InvocationContext;
import javax.annotation.PostConstruct;
/**
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @version $Revision: 57207 $
*/
public class LifecycleInterceptor
{
@PostConstruct
public void postConstruct(InvocationContext ctx)
{
try
{
System.out.println("LifecycleInterceptor postConstruct");
ctx.proceed();
}
catch(Exception e)
{
throw new RuntimeException(e);
}
}
}
File: Customer.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.callback.bean;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "CUSTOMER")
@EntityListeners(CustomerCallbackListener.class)
public class Customer implements java.io.Serializable
{
private int id;
private String first;
private String last;
private String street;
private String city;
private String state;
private String zip;
public Customer()
{
}
public Customer(String first, String last, String street, String city, String state, String zip)
{
this.first = first;
this.last = last;
this.street = street;
this.city = city;
this.state = state;
this.zip = zip;
}
@Id @GeneratedValue(strategy=GenerationType.AUTO)
public int getId()
{
return id;
}
public void setId(int id)
{
this.id = id;
}
@Column(name = "FIRST")
public String getFirst()
{
return first;
}
public void setFirst(String first)
{
this.first = first;
}
@Column(name = "LAST")
public String getLast()
{
return last;
}
public void setLast(String last)
{
this.last = last;
}
@Column(name = "STREET")
public String getStreet()
{
return street;
}
public void setStreet(String street)
{
this.street = street;
}
@Column(name = "CITY")
public String getCity()
{
return city;
}
public void setCity(String city)
{
this.city = city;
}
@Column(name = "STATE")
public String getState()
{
return state;
}
public void setState(String state)
{
this.state = state;
}
@Column(name = "ZIP")
public String getZip()
{
return zip;
}
public void setZip(String zip)
{
this.zip = zip;
}
}
File: Client.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.callback.client;
import org.jboss.tutorial.callback.bean.Customer;
import org.jboss.tutorial.callback.bean.CustomerDAO;
import javax.naming.InitialContext;
import java.util.List;
public class Client
{
public static void main(String[] args) throws Exception
{
InitialContext ctx = new InitialContext();
CustomerDAO dao = (CustomerDAO) ctx.lookup("CustomerDAOBean/remote");
System.out.println("Create Bill Burke and Monica Smith");
dao.create("Bill", "Burke", "1 Boston Road", "Boston", "MA", "02115");
int moId = dao.create("Monica", "Smith", "1 Boston Road", "Boston", "MA", "02115");
System.out.println("Bill and Monica get married");
Customer monica = dao.find(moId);
monica.setLast("Burke");
dao.merge(monica);
System.out.println("Get all the Burkes");
List burkes = dao.findByLastName("Burke");
System.out.println("There are now " + burkes.size() + " Burkes");
System.out.println("Bill and Monica are moving abroad");
dao.delete(burkes);
}
}
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