Java/EJB3/Entity Blob — различия между версиями
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Текущая версия на 09:50, 1 июня 2010
EJB Tutorial from JBoss: Entity with Blob data
<source lang="java">
File: BlobEntity.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.blob.bean; import java.io.Serializable; import java.sql.Blob; import java.sql.Clob; import javax.persistence.Basic; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Lob; /**
* Comment * * @author
Save Binary Data Through Ejb
<source lang="java">
File: CustomerType.java
public enum CustomerType {
UNREGISTERED, REGISTERED, BIG_SPENDAH
}
File: Employee.java
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
//@Table(name="EMP", schema="HR")
@Table(name="EMP")
public class Employee implements Serializable {
@Id @Column(name = "EMP_ID") private int id; @Column(name = "COMM") private String name; @Column(name = "SAL") private long salary; private CustomerType customerType; private Date timeCreated = new Date(); private MyImage picture; public Employee() { } public Employee(int id) { this.id = id; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public long getSalary() { return salary; } public void setSalary(long salary) { this.salary = salary; } @Enumerated(EnumType.STRING) public CustomerType getCustomerType() { return customerType; } public void setCustomerType(CustomerType type) { customerType = type; } @Temporal(TemporalType.TIME) public Date getTimeCreated() { return timeCreated; } public void setTimeCreated(Date time) { timeCreated = time; } @Lob @Basic(fetch=FetchType.LAZY) public MyImage getPicture() { return picture; } public void setPicture(MyImage jpeg) { picture = jpeg; } public String toString() { return "Employee id: " + getId() + " name: " + getName() + " salary: " + getSalary(); }
}
File: EmployeeService.java
import java.util.Collection; import javax.ejb.Remove; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.Query; @Stateless public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
@PersistenceContext(unitName="EmployeeService") EntityManager em; public EmployeeService() { } public Employee createEmployee(Employee emp) { em.persist(emp); em.flush(); return emp; } public Employee createEmployee(int id, String name, long salary) { Employee emp = new Employee(id); emp.setName(name); emp.setSalary(salary); em.persist(emp); em.flush(); return emp; } public void removeEmployee(int id) { Employee emp = findEmployee(id); if (emp != null) { em.remove(emp); } } public Employee raiseEmployeeSalary(int id, long raise) { Employee emp = em.find(Employee.class, id); if (emp != null) { emp.setSalary(emp.getSalary() + raise); } return emp; } public Employee findEmployee(int id) { return em.find(Employee.class, id); } public Collection<Employee> findAllEmployees() { Query query = em.createQuery("SELECT e FROM Employee e"); return (Collection<Employee>) query.getResultList(); } public void doAction(){ } @Remove public void remove() { System.out.println("removed"); }
}
File: EmployeeServiceLocal.java
import java.util.Collection; import javax.ejb.Local; @Local public interface EmployeeServiceLocal {
public void doAction(); public Employee createEmployee(int id, String name, long salary) ; public Employee createEmployee(Employee emp) ; public void removeEmployee(int id); public Employee raiseEmployeeSalary(int id, long raise) ; public Employee findEmployee(int id); public Collection<Employee> findAllEmployees() ;
}
File: EmployeeServiceRemote.java
import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
public void doAction(); public Employee createEmployee(int id, String name, long salary) ; public Employee createEmployee(Employee emp) ; public void removeEmployee(int id); public Employee raiseEmployeeSalary(int id, long raise) ; public Employee findEmployee(int id); public Collection<Employee> findAllEmployees() ;
}
File: MyImage.java public class MyImage implements java.io.Serializable {
public MyImage() {}
}
File: Main.java import java.util.Collection; 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.createEmployee(158, "AAA", 45000); service.createEmployee(159, "AAA", 45000); Employee emp = new Employee(); emp.setId(160); emp.setCustomerType(CustomerType.BIG_SPENDAH); MyImage oneUglyDude = new MyImage(); emp.setPicture(oneUglyDude); service.createEmployee(emp); Employee emp1 = service.findEmployee(160); System.out.println(emp1); Collection<Employee> list = service.findAllEmployees(); System.out.println(list); }
}
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
</source>