1. Apache Tuscany Demo BigBank Example
Mario Antollini
February 06, 2007

2. Demo Intention Introduction to the Bigbank example Backend Module
Modules Overview
Backend Module
Front-end Module
Live Demo
Back-end Module Modified
Interacting with External Service
11/28/2018

3. Apache Tuscany – BigBank
Sample application using SCA, SDO's and DAS.
Example description:
BigBank is a fictitious financial institution that provides customers the ability to view account balances, transfer funds, and also buy and sell stocks.
Two modules:
Account Module for accessing client information in a legacy system
Web Client Module providing browser-based functionality for logging into the system and accessing account information
Composite
Account Module
(Java)
Web Client
Module
Wiring
Web Service Call
11/28/2018

4. Demo Intention Introduction to the Bigbank example Backend Module
Modules Overview
Backend Module
Front-end Module
Live Demo
Back-end Module Modified
Interacting with External Service
11/28/2018

5. BigBank – Account Module
The Entry Point to the module is the Account Service
It has two Components:
Account Service Component: Provides an implementation of the Account Service. Furthermore, it has one property (currency), and two references, one to a local component called Account Data Service and other to a local service called Stock Quote Service
Account Data Service Component: takes the role of legacy system; provides checking account, saving account and stock account information
Service
(WSDL interface
Web Service
binding)
Every Web Service call to the Account Module will reach the Account Service Component
Account Service
Component
(Java)
Property
(currency - String)
Account Data Service
Component
(Java)
Direct calls to Java classes
Stock Quote Service
Component
(Java)
Stock Quote Service (POJO component)
DAS Communication
SDO Mapping
DataBase
(Derby) D A S
Account Module
11/28/2018

6. Account Module – SCDL File
11/28/2018

7. Demo Intention Introduction to the Bigbank example Backend Module
Modules Overview
Backend Module
Front-end Module
Live Demo
Back-end Module Modified
Interacting with External Service
11/28/2018

8. BigBank – Web Client Module
The Web Client Module contains:
The User Interface: a set of JSP, HTML and pure Java Servlet files (we could use JSF or Struts here)
The Login Service Component and Profile Service Component: provide local services for managing user state
The External Account Service, a Java class accessing the remote account service of the Account module. However, in the java class the calls are done to a Java Interface. At runtime, it will become a Web Services call. SCA runtime needs the Account Service WSDL file
Login Service
Component
(Java)
The Servlet obtains The Login Service Component Reference from the SCA context
LoginServlet.java
Property
(name - string)
Profile Service
Component
(Java)
(firstname - string)
Account Service
Web Client Module
User Interface
Login.html
Account
Summary
.jsp
LoginBarrier
Tag
Service
AccountService
Reference to the External Account Module
(WSDL interface - Web Service binding)
11/28/2018

9. Web Client Module – SCDL file
11/28/2018

10. Demo Intention Introduction to the Bigbank example Backend Module
Modules Overview
Backend Module
Front-end Module
Live Demo
Back-end Module Modified
Interacting with External Service
11/28/2018

11. Demo Intention Introduction to the Bigbank example Backend Module
Modules Overview
Backend Module
Front-end Module
Live Demo
Back-end Module Modified
Interacting with External Service
11/28/2018

12. BigBank - Account Module – External WS
Now the Stock Quote Service Component calls to an external Web Service.
Since binding is externally declared using XML, no code change in Account Service Component was required
Account Service
Component
(Java)
Every Web Service call to the Account Module will reach the Account Service Component
Property
(currency - String)
Account Data Service
Component
(Java)
Direct calls to Java classes
Stock Quote Service
Component
(Java)
Account Module
Reference to the External Stock Quote Service
(WSDL interface - Web Service binding)
Stock Quote Service
(External Service)
Service
(WSDL interface
Web Service
binding)
11/28/2018

13. Account Module – SCDL File for External WS
All we need to do is changing the SCDL file and give Tuscany the external WSDL file. The SCA Runtime will do the ‘wiring’
11/28/2018

14. Account Module – Stock Quote Service Reference Injection
11/28/2018

15. Demo Intention Introduction to the Bigbank example Backend Module
Modules Overview
Backend Module
Front-end Module
Live Demo
Back-end Module Modified
Interacting with External Service
11/28/2018

16. Backup
11/28/2018

17. Apache Tuscany - Lines of Code (Java) and Java Files, Java Version
Module
Lines of Code Including Black Lines and Comments
Lines of Code Including Black Lines, Excluding Comments
Java Files
Complete Java module
(sample apps, samples, testing, etc)
2.107
Data Access Service (DAS) Module
15.500
12.000
143
Service Component Architecture (SCA) Module
1.452
Service Data Object (SDO) Module
64.000
46.000
204
Spec
5.900
2.100 65
TOTAL
1.864
11/28/2018