MiniBankSession.Java

package bank;

import java.util.Date;

import java.util.List;

import javax.ejb.Stateless;

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

import javax.persistence.Query;

@Stateless

public class MiniBankSession implements MiniBankSessionRemote, MiniBankSessionLocal {

@PersistenceContext(unitName = "MiniBank-ejbPU")

private EntityManager em;

public void persist(Object object) {

//em.persist(object);

}

@Override

public void addAccount(String name) {

Accounts account = new Accounts();

account.setName(name);

account.setAccount(0);

em.persist(account);

addLog(account.getId(),"addAccount");

}

@Override

public List getAccounts() {

Query query = em.createNamedQuery("Accounts.findAll");

List accounts = query.getResultList();

return accounts;

}

@Override

public List getAccount(int id) {

Query query = em.createNamedQuery("Accounts.findById").setParameter("id", id);

List account = query.getResultList();

return account;

}

@Override

public void addMoney(int id, int money) {

Accounts account = em.find(Accounts.class, id);

account.setAccount(account.getAccount() + money);

em.persist(account);

addLog(id,"addMoney("+money+")");

}

@Override

public int withdrawalMoney(int id, int money) {

Accounts account = em.find(Accounts.class, id);

int oldMoney = account.getAccount();

if( oldMoney < money ) {

return 0;

}

account.setAccount(oldMoney - money);

em.persist(account);

addLog(id,"withdrawalMoney("+money+")");

}

public void addLog(int id, String descr) {

Log log = new Log();

log.setDate( new Date() );

log.setDescr(descr);

log.setAssignedAccounts( em.find(Accounts.class, id) );

em.persist(log);

}

@Override

public List getLogs() {

Query query = em.createNamedQuery("Log.findAll");

List logs = query.setMaxResults(20).getResultList();

return logs;

}

}

MiniBankSessionLocal.java

package bank;

import javax.ejb.Local;

@Local

public interface MiniBankSessionLocal {

}

Log.java

package bank;

import java.io.Serializable;

import java.util.Date;

import javax.persistence.Basic;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.ManyToOne;

import javax.persistence.NamedQueries;

import javax.persistence.NamedQuery;

import javax.persistence.Table;

import javax.persistence.Temporal;

import javax.persistence.TemporalType;

import javax.validation.constraints.NotNull;

import javax.validation.constraints.Size;

import javax.xml.bind.annotation.XmlRootElement;

@Entity

@Table(name = "LOG")

@XmlRootElement

@NamedQueries({

@NamedQuery(name = "Log.findAll", query = "SELECT l FROM Log l ORDER BY l.date DESC"),

@NamedQuery(name = "Log.findById", query = "SELECT l FROM Log l WHERE l.id = :id"),

@NamedQuery(name = "Log.findByDate", query = "SELECT l FROM Log l WHERE l.date = :date"),

@NamedQuery(name = "Log.findByDescr", query = "SELECT l FROM Log l WHERE l.descr = :descr")})

public class Log implements Serializable {

private static final long serialVersionUID = 1L;

@ManyToOne

@NotNull

private Accounts assignedAccounts;

public Accounts getAssignedAccounts() {

return assignedAccounts;

}

public void setAssignedAccounts(Accounts account) {

this.assignedAccounts = account;

}

@Id

@Basic(optional = false)

@NotNull

@GeneratedValue

@Column(name = "ID")

private Integer id;

@Basic(optional = false)

@NotNull

@Column(name = "DATE")

@Temporal(TemporalType.DATE)

private Date date;

@Basic(optional = false)

@NotNull

@Size(min = 1, max = 120)

@Column(name = "DESCR")

private String descr;

public Log() {

}

public Log(Integer id) {

this.id = id;

}

public Log(Integer id, Date date, String descr) {

this.id = id;

this.date = date;

this.descr = descr;

}

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public Date getDate() {

return date;

}

public void setDate(Date date) {

this.date = date;

}

public String getDescr() {

return descr;

}

public void setDescr(String descr) {

this.descr = descr;

}

@Override

public int hashCode() {

int hash = 0;

hash += (id != null ? id.hashCode() : 0);

return hash;

}

@Override

public boolean equals(Object object) {

if (!(object instanceof Log)) {

return false;

}

Log other = (Log) object;

if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {

return false;

}

return true;

}

@Override

public String toString() {

return "bank.Log[ id=" + id + " ]";

}

}

MiniBankSessionRemote.java

package bank;

import java.util.List;

import javax.ejb.Remote;

@Remote

public interface MiniBankSessionRemote {

void addAccount(String name);

List getAccounts();

List getAccount(int id);

void addMoney(int id, int money);

int withdrawalMoney(int id, int money);

List getLogs();

}

Web-модуль:

add_account.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">

<title>Создание нового счёта</title>

</head>

<body>

<h1>Создание нового счёта</h1>

<form action="add_account_post.jsp" method="POST">

<p>Имя: <input type="text" name="name" value="" /> <input type="submit" value="Добавить" /> </p>

</form>

<p><a href="index.jsp">Return</a></p>

</body>

</html>