Distributed Object Computing - Computer Science, Engineering Design - Lecture Slides, Slides of Computer Science

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Distributed Object Computing

and UML

Objective

• Explore UML Modeling Techniques/Constructs

and Identify Support to DOC

• Employ Rational ROSE to Model and Develop a

Distributed Banking Application (using RMI)

• Identify Key Distribution Issues Relating to OOM

• Explore a Select Set of UML Modeling Tools to

Identify DOC Support

Behavioral Modeling

System Use Case

Process Transactions Distributed Communication Persistent Storage Report Generation Printing Auditing Clerk

BANKING SYSTEM

The Customer Manager <> <> (^) <> <> <>

THE CLERK

THE

CUSTOMER

THE

MANAGER

TheServer

THE SERVER

Deployment Diagram

Description

• To Get an Idea of How the System Would Be

Distributed

• Concept of More Than One Type of Bank Server
• Questions:
  • What Kind of Functionality is Distributed Where?
  • Where is Security, Servers or Clients, Both?
• Where Should We Deploy Objects, and Which Object?
• Servers Handling Multiple Clients And/or Server

Transactions at the Same Time

• Attempt to Make Our System Generic So That We Can

Run All Possible Scenarios

Structural Modeling

Logical and Component Views

ClientServerGui U TheServer U ClientServerGui U TheServer U CLASS DIAGRAM COMPONENT DIAGRAM

Initial Logical View of Client

This is Where The Applet GUI Goes. To be Added To The Model Later. RMI Here CustomerProfileForm (from TheServer) Serializable (from io) <> CustomerAccountForm (from TheServer) Vector (from util) TransactionInterface <> TellerInterface <> BankConnection

+BankTransaction

+TellerTransaction

Initial Logical View of the Server

Simulator

FunnyMoney amount : int Serializable (from io) <> Remote (from rmi) <> This is Where The Applet GUI Goes. To be Added To The Model Later. RMI Here TransactionInterface <> (^) UnicastRemoteObject (from server) SessionInterface <> Hashtable (from util) Account Account() SessionHandler TransactionByRole $ GOOD_CONN : int = 0 accounts RemoteBankServer 1 +TheAccount 1 1 +TheSessionHandler 1 +TheTransactionHandler AtmTrans TellerTrans MgrTrans TellerInterface <> CustomerProfileForm (from TheServer) CustomerAccountForm (from TheServer)

Behavioral Modeling

Sequence Diagram of Log In

Client 1 Server Enter UName And Passwd Send UName And Passwd Verify UName And Passwd Send Connection Status Prompt User For Transaction Info Allocate Memory And Resources For Transactions Allocate Memory And Resources For Transactions

Final Application Models and

Deployment

• Each of Us to Explain his/her Own Piece in

Detail

– Hector - Client GUI and App

– Oliver - Main Server Transaction and Interface

Hierarchy

– Gowri - Main Server Banking Application

• Only a Prototype - Not a Full-Fledged

Application

• Demo is Limited to a Couple of Transactions

• Goal is to Prove Java RMI Concepts, Interfaces,Docsity.com

Final Development

Applet and ConnectionBankConnection

$ GOOD_CONN : int = 0

$ UNK_CONN_ERR : int = 1

$ REMOT_ERR : int = 2

$ NOT_BOUND_ERR : int = 3

$ COMM_FAILED : int = 4

$ ATM_CONN : int = 11

$ TELLER_CONN : int = 12

$ MGR_CONN : int = 13

$ VERIF_FAILED : int = 14

$ TRANSACTION_PASSED : int = 20

$ TRANSACTION_FAILED : int = 21

Connect_To_Bank()

Run_Query()

Login()

Logout()

SendCustomerProfile()

SendCustomerAccount()

Connect_To_ServerBank()

LoginToServer()

LogoutFromServer()

ShowAllCustomers()

BankingApp

init()

JMenuItem2_actionPerformed()

JMenuItem2_actionPerformed_Interaction1()

JMenuItem18_actionPerformed()

JMenuItem18_actionPerformed_Interaction1()

JMenuItem2_actionPerformed_Interaction2()

myBankingAppCode_Logout()

JMenuItem4_actionPerformed()

JMenuItem4_actionPerformed_Interaction1()

JMenuItem4_actionPerformed_Interaction2()

createCustProfMenu_actionPerformed()

createCustProfMenu_actionPerformed_Interaction1()

closeMenu_actionPerformed()

closeMenu_actionPerformed_Interaction1()

createNewAccountMenu_actionPerformed()

createNewAccountMenu_actionPerformed_Interaction1()

myBankingAppCode_ShowAllCustomers()

JShowCustomersMItem_actionPerformed()

JShowCustomersMItem_actionPerformed_Interaction1()

+$MyBankConnection

APPLET AND

GUI

ITS CONNECTION TO THE

CLIENT BANK ENGINE

RMI Structure

• Make Method Callable by Declaring Signature

in Interface

• Compile Class and Interface and Generate

Stub and Skeleton

Stub

Client Object

Skeleton

Server Object

RMI Flow of Events

Server - Transaction Objects

Server - Transaction Interfaces