Building Java Enterprise Applications Volume I: Architecture phần 10 ppt

The Fund Remote Interface package com.forethought.ejb.fund; import java.rmi.RemoteException; import javax.ejb.EJBObject; public interface Fund extends EJBObject { public FundInfo getIn

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public AccountTypeLocal findByPrimaryKey(Integer accountTypeID)

throws FinderException, EJBException;

public AccountTypeLocal findByType(String type)

}

Example E-12 is the implementation class for the AccountType bean

Example E-12 The AccountTypeBean Implementation Class

public abstract class AccountTypeBean extends EntityAdapter {

public Integer ejbCreate(String type) throws CreateException {

// Get the next primary key value

try {

Context context = new InitialContext( );

// Note that RMI-IIOP narrowing is not required

SequenceLocalHome home = (SequenceLocalHome)

context.lookup("java:comp/env/ejb/SequenceLocalHome"); SequenceLocal sequence = home.create( );

public abstract void setId(Integer id);

public abstract Integer getId( );

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public abstract String getType( );

public abstract void setType(String type);

}

E.1.4 The Fund Bean

Example E-13 is the remote interface for the Fund entity bean

Example E-13 The Fund Remote Interface

package com.forethought.ejb.fund;

import java.rmi.RemoteException;

import javax.ejb.EJBObject;

public interface Fund extends EJBObject {

public FundInfo getInfo( ) throws RemoteException;

public void setInfo(FundInfo fundInfo) throws RemoteException;

public Integer getId( ) throws RemoteException;

public String getName( ) throws RemoteException;

public void setName(String name) throws RemoteException;

public String getDescription( ) throws RemoteException;

public void setDescription(String description)

public interface FundLocal extends EJBLocalObject {

public Integer getId( ) throws EJBException;

public String getName( ) throws EJBException;

public void setName(String name) throws EJBException;

public String getDescription( ) throws EJBException;

public void setDescription(String description)

throws EJBException;

}

Example E-15 shows the information class (FundInfo) for the Fund entity bean

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Example E-15 The FundInfo Class

package com.forethought.ejb.fund;

import java.io.Serializable;

public class FundInfo implements Serializable {

private int id;

private String name;

private String description;

protected FundInfo(int id, String name, String description) {

The home interface for the Fund entity bean is shown in Example E-16

Example E-16 The FundHome Interface

public interface FundHome extends EJBHome {

public Fund create(String name, String description)

throws CreateException, RemoteException;

public Fund findByPrimaryKey(Integer fundID)

throws FinderException, RemoteException;

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public Fund findByName(String name)

}

The local home interface for the Fund bean is shown in Example E-17

Example E-17 The FundLocalHome Interface

public interface FundLocalHome extends EJBLocalHome {

public FundLocal create(String name, String description)

throws CreateException, EJBException;

public FundLocal findByPrimaryKey(Integer fundID)

public FundLocal findByName(String name)

}

Example E-18 is the Fund bean's implementation class

Example E-18 The FundBean Implementation Class

public abstract class FundBean extends EntityAdapter {

public Integer ejbCreate(String name, String description)

String fundKey =

(String)context.lookup(

"java:comp/env/constants/FundKey");

Integer id = sequence.getNextValue(fundKey);

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public abstract String getName( );

public abstract void setName(String name);

public abstract String getDescription( );

public abstract void setDescription(String description);

}

E.1.5 The Account Bean

Example E-19 is the Account bean's remote interface

Example E-19 The Account Remote Interface

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public void setInfo(AccountInfo accountInfo)

throws RemoteException, UnknownAccountTypeException;

public User getUser( ) throws RemoteException;

public void setUser(User user) throws RemoteException;

public String getType( ) throws RemoteException;

public void setType(String type)

throws RemoteException, UnknownAccountTypeException;

public float getBalance( ) throws RemoteException;

public void setBalance(float balance) throws RemoteException;

}

Example E-20 is the local interface for the Account bean, used in CMP relationships

Example E-20 The AccountLocal Interface

public interface AccountLocal extends EJBLocalObject {

public Integer getId( ) throws EJBException;

public UserLocal getUserLocal( ) throws EJBException;

public void setUserLocal(UserLocal userLocal) throws EJBException; public String getType( ) throws EJBException;

public void setType(String type)

throws EJBException, UnknownAccountTypeException;

public float getBalance( ) throws EJBException;

public void setBalance(float balance) throws EJBException;

}

The information map for the Account bean is shown in Example E-21

Example E-21 The AccountInfo Class

package com.forethought.ejb.account;

import java.io.Serializable;

// User bean

import com.forethought.ejb.user.UserInfo;

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public class AccountInfo implements Serializable {

private int id;

private UserInfo userInfo;

private String type;

private float balance;

AccountInfo(int id, String type, float balance, UserInfo userInfo) {

The home interface for the Account bean is shown in Example E-22

Example E-22 The AccountHome Interface

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// User bean

import com.forethought.ejb.user.User;

public interface AccountHome extends EJBHome {

public Account create(String type, float balance, User user)

throws CreateException, RemoteException,

UnknownAccountTypeException;

public Account findByPrimaryKey(Integer accountID)

public Collection findByBalance(float minBalance, float maxBalance) throws FinderException, RemoteException;

}

Example E-23 shows the Account bean's local home interface

Example E-23 The AccountLocalHome Interface

public interface AccountLocalHome extends EJBLocalHome {

public AccountLocal create(String type, float balance, User user)

throws CreateException, EJBException, UnknownAccountTypeException; public AccountLocal findByPrimaryKey(Integer accountID)

public Collection findByBalance(float minBalance, float maxBalance) throws FinderException, EJBException;

}

Example E-24 is the implementation class for the Account bean

Example E-24 The AccountBean Implementation Class

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public abstract class AccountBean extends EntityAdapter {

public Integer ejbCreate(String type, float balance, User user)

throws CreateException, UnknownAccountTypeException {

try {

String accountKey =

(String)context.lookup("java:comp/env/constants/AccountKey"); Integer id = sequence.getNextValue(accountKey);

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public AccountInfo getInfo( ) throws RemoteException {

AccountInfo accountInfo =

new AccountInfo(getId().intValue(),

getAccountTypeLocal().getType( ), getBalance(), getUser().getInfo( ));

// Couldn't find supplied type

throw new UnknownAccountTypeException(type);

// Construct primary key for this user

Integer userID = user.getId( );

// Find the local interface for this office

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} catch (FinderException shouldNeverHappen) {

// This should never happen; the ID from an office's remote // interface should match an office's ID in a local interface throw new EJBException("Error matching remote User to " +

"local User: " + shouldNeverHappen.getMessage( ));

// Construct primary key for this user

Integer userID = new Integer(userInfo.getId( ));

// Find the local interface for this office

// This should never happen; the ID from an office's remote // interface should match an office's ID in a local interface throw new EJBException("Error matching remote User to " +

}

public User getUser( ) {

// Construct primary key for this office

Integer userID = getUserLocal().getId( );

try {

// Find the remote interface for this office

// This should never happen; the ID from a user's remote

// interface should match a user's ID in a local interface throw new EJBException("Error matching remote User to " +

}

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public abstract UserLocal getUserLocal( );

public abstract void setUserLocal(UserLocal userLocal);

public abstract AccountTypeLocal getAccountTypeLocal( );

public abstract void setAccountTypeLocal(AccountTypeLocal

accountTypeLocal);

public abstract float getBalance( );

public abstract void setBalance(float balance);

}

E.1.6 The Transaction Bean

The remote interface for the Transaction bean is shown in Example E-25

Example E-25 The Transaction Remote Interface

public interface Transaction extends EJBObject {

public TransactionInfo getInfo( ) throws RemoteException;

public void setInfo(TransactionInfo transactionInfo)

throws RemoteException;

public Account getAccount( ) throws RemoteException;

public void setAccount(Account account) throws RemoteException;

public float getAmount( ) throws RemoteException;

public void setAmount(float amount) throws RemoteException;

public Date getDateTime( ) throws RemoteException;

public void setDateTime(Date dateTime) throws RemoteException;

}

Example E-26 is the Transaction bean's information/value class

Example E-26 The TransactionInfo Class

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public class TransactionInfo implements Serializable {

private int id;

private AccountInfo accountInfo;

private float amount;

private Date dateTime;

TransactionInfo(int id, float amount, Date dateTime,

Example E-27 shows the home interface for the Transaction bean

Example E-27 The TransactionHome Interface

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public interface TransactionHome extends EJBHome {

public Transaction create(float amount, Date dateTime, Account account) throws CreateException, RemoteException;

public Transaction findByPrimaryKey(Integer transactionID)

public Collection findByAmount(float minAmount, float maxAmount)

}

Example E-28 is the Transaction bean's implementation class

Example E-28 The TransactionBean Implementation Class

public abstract class TransactionBean extends EntityAdapter {

public Integer ejbCreate(float amount, Date dateTime, Account account) throws CreateException {

try {

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public Account getAccount( ) throws RemoteException {

// Construct primary key for this account

Integer accountID = getAccountLocal().getId( );

try {

// Find the remote interface for this account

// This should never happen; the ID from an account's remote // interface should match an account's ID in a local interface throw new EJBException("Error matching remote Account to " + "local Account: " + shouldNeverHappen.getMessage( )); }

}

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public void setAccount(Account account) {

try {

Integer accountID = account.getId( );

// Find the local interface for this account

}

public void setAccount(AccountInfo accountInfo) {

try {

Integer accountID = new Integer(accountInfo.getId( ));

// Find the local interface for this account

}

public abstract AccountLocal getAccountLocal( );

public abstract void setAccountLocal(AccountLocal accountLocal);

public abstract float getAmount( );

public abstract void setAmount(float amount);

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public abstract Date getDateTime( );

public abstract void setDateTime(Date dateTime);

}

E.1.7 The Investment Bean

Example E-29 is the Investment bean's remote interface

Example E-29 The Investment Remote Interface

public interface Investment extends EJBObject {

public InvestmentInfo getInfo( ) throws RemoteException;

public void setInfo(InvestmentInfo investmentInfo)

public Fund getFund( ) throws RemoteException;

public void setFund(Fund fund) throws RemoteException;

public Account getAccount( ) throws RemoteException;

public void setAccount(Account account)

public float getInitialAmount( ) throws RemoteException;

public void setInitialAmount(float initialAmount)

public float getYield( ) throws RemoteException;

public void setYield(float yield) throws RemoteException;

}

Example E-30 is the Investment bean's information class

Example E-30 The InvestmentInfo Class

Tiêu đề	Building Java Enterprise Applications Volume I: Architecture
Trường học	University of Economics and Technology
Chuyên ngành	Java Enterprise Applications
Thể loại	Lecture notes
Năm xuất bản	2023
Thành phố	Hanoi

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