Notes On Software Development, Platform And Modernisation

Notes on Software Development, Platform and Modernisation Alan McSweeney

Objectives
Provide information on the advantages and disadvantages of .NET and Java development and operational platforms
Provide information on approaches to software development
Provide information on approaches to refresh of existing software
Focus on banking systems and IBM platforms

Agenda
Context of application development
Comparison of .Net and Java
Application design and delivery landscape
Software modernisation

View of Application Development and Deployment
Decision is wider than just selecting a development platform
Need to take account of other factors:
Application lifecycle – from application design, development, testing, deployment and operation
Refresh/modernisation of existing applications
Other initiatives such as SOA
Existing application development and deployment standards and approaches
Consider an integrated approach to application development and deployment

High Level View of Application and System Landscape IT Assets Accountability Reduce Cost New Channels Visibility New Services Customer Service Shareholder Value Governance Business Drivers Business Requirements Better Information insight Support Business Requirements Faster Efficient Delivery Of New Services Automation of Existing Processes Reusable, Standard Services Standard Integration of Services Business Processes Services Services Services Services Business Service Business Service Business Service Business Service Services Business Service Business Units Legacy Systems Web Sites Databases Core Applications

View of Long-Term Application Landscape IT Assets Reusable, Standard Services Standard Integration of Services Business Processes Services Services Services Services Business Service Business Service Business Service Business Service Services Business Service Service Oriented Architecture IT Assets Business Units Legacy Systems Web Sites Databases Core Applications Business Requirements Better Information insight Support Business Requirements Faster Efficient Delivery Of New Services Automation of Existing Processes Business Process Management Accountability Reduce Cost New Channels Visibility New Services Customer Service Shareholder Value Governance Business Drivers Business Process Improvement

Java and .NET Comparison Notes

Java and .NET Comparison Notes
Both multi-tiered, similar computing technologies
Both support “standards”
Both offer different tools and ways to achieve the same goal
A lot of parallelism can be seen
Very difficult to compare and qualify the comparison because each has its own advantages and disadvantages
No right answer
Depends on business and organisation context

J2EE Application Architecture

.NET Application Architecture

Overview of J2EE and .NET Visual Studio.Net Rational, Eclipse, JBuilder etc. Tools support Multiple Languages JAVA Language support CLR JRE Interpreter Windows Variety of Operating systems Portability CLR (Common Language Runtime) JVM (Java Virtual Machine) Execution Engine ADO.NET JDBC Database Connectivity .Net Managed Components EJBs Middle-Tier Components ASP.NET JSPs Web Pages and HTML Microsoft Oracle, IBM, Oracle, Apache and many others Middleware Vendors Product Standard Type of Technology .NET J2EE FEATURE

Detail of J2EE and .NET Visual Studio .Net, the single IDE for building .Net windows, web applications, or XML Web services Java features a wide variety of tools – Rational, Eclipse, JBuilder, JDeveloper etc Tools support It is language independent and can use any language once a mapping exists from that language to IL Only Java is supported Language support .Net only supports the Windows platform J2EE offers complete cross-platform portability Portability The CLR environment executes .Net's Microsoft Intermediate Language code Java source code compiles into machine-independent byte code, which the JVM interprets at runtime Execution Engine ADO.NET JDBC Database Connectivity A variety of data sources can be accessed by developers through .Net's ADO.Net classes Two main types of entity beans are used to model persistent data which are container-managed and bean-managed Data Access .Net remoting allows calls to remote objects distributed across application domains, processes, and machine boundaries JNDI finds server-side components such as EJBs or JMS queues Calling Remote Objects Manual transaction management or automated through CLR Manual transaction management or automated through containers Transactions ASP.NET under Internet Information Server (IIS) JSPs and Servlets HTML generation .NET J2EE FEATURE

Generic Framework for Web Applications Workflow Engine Web-based and -related Protocols (HTTP, SMTP, ...) Service Description, Discovery, Integration (UDDI) Service Description (WSDL) Service Context (Who, Where, When, Why, ....) Virtual Machine Micro/Macro Services Integration Layer Legacy Backend Server Mainframe Frontend Layer (Web Server) Web Service User/Provider Core Services (Calendar, Preferences, Transactions, ...) Core Elements of Web Application Framework Clients

.Net Implementation of Framework .NET Devices .NET Servers SQL Server, Biztalk, Commerce, Exchange, Mobile Information, Host Integration, Application Center .NET Foundation Services Passport, Calendar, Directory & Search, Notification & Messaging, Personalization, Web-Store/XML, Dynamic Delivery of Software and Services Common Language Runtime (Memory Management, Common Type System, Lifecycle Monitor) .NET Framework & Tools Base Classes (ADO.NET, XML, Threading, IO, ....) ASP.NET (Web Services, Web Forms, ASP.NET Application Services) Windows Forms (Controls, Drawing, Windows Application Services)

Java Implementation of Framework Service Interface Service Container (J2EE, EJB, JSP, J2SE, J2ME, MIDP, Java Card) Process Management Service Integration (SQL, JDBC, XML, XSLT, XP, JMS, RMI, J2EE Connectors, ...) Service Platform Smart Management (SNMP, CIM, WBEM, JMX) Smart Delivery (XML, HTML, XHTML, WML, VoiceXML, XSLT, HTTP, SSL, XP, SOAP, WSDL, UDDI, ebXML, ...) Web Services Smart Process (ebXML, XAML) Smart Policy (LDAP, Kerberos, PKI, OASIS Security)) Service Creation and Assembly (JB, JSP, EJB)

.NET And/Or Java
Not just one or the other – can use a mixed application environment Pure Windows applications are probably better done with .NET than Java
Java should be used when platform (or vendor-) independence is necessary/desirable
Java is more mature
There is Java for .NET via IBM Rational
Both can be used for web services - .NET is “easier” but J2EE is more scalable
Other practical factors must be taken into consideration

Sample Scoring
Java, JVM are open standards
* *****
Open Standards
Deploy same code on multiple platforms and multiple projects
** ****
Reuse
VB code easier to learn
*** **
Speed of development
Java more scalable for very large systems
*** ****
Performance
VB/Com development since 1993
**** **
Reliability
VB,C#,J# all run in the same run-time environment
**** *
Multiple Languages Single Platform
Java Can run on many platforms through the JVM
* ****
Single Language Multiple Platforms
Execute Java Code on Mainframe
** ***
Scalability
VB.net and C# are easier to use than J2EE
**** **
Ease Of Use (Development Environment)
Comments .NET J2EE Criteria

Java Development Options Comparison

Application Design and Delivery Landscape Notes

Application Design and Delivery Landscape
Bigger picture – put application development in context
Look at bigger picture
Management framework
Process and portfolio management
Change and release management
Requirements management
Quality management
Analysis, design and develop
Deployment and operation

Process and Portfolio Management – IBM Create, customise and deploy an SOA Governance Process using IBM Rational Method Composer Use IBM Rational Portfolio Manager to identify and manage your software development projects and resources, assess cost and ROI, and comply with your SOA Governance policies

Change and Release Management - IBM Use IBM Rational ClearCase for full lifecycle management, and version control of development artifacts Use IBM Rational ClearQuest for geographically distributed activities, changes and defect management Use IBM Rational BuildForge to achieve a repeatable, automated build process to accelerate software delivery Use IBM Rational Asset Manager to define, create, group, store, search, retrieve, measure and govern the re-use of development assets

Requirements and Quality Management Use IBM Rational ClearQuest and Rational Functional Tester for integrated test, activity and quality management Use Rational RequisitePro to ensure business needs drive IT investment and validate that the deployed solutions meet quality measures, managing requirements throughout the development lifecycle Use IBM Rational Performance Tester to perform performance and load testing with local/remote execution and monitoring

Analysis, Design and Construction Use WebSphere Business Modeler and Integration Developer to model business processes, simulate / socialise business cases and make human / automated workflows executable. Use IBM Rational Software Architect to understand your existing architecture and drive its evolution, using analysis, modeling and transformation capabilities across UML and source code boundaries Use IBM’s Eclipse-powered Rational Application Developer to code, generate, unit test, analyze and debug your applications & services across the Java, Web, Portal and open standards landscapes

Govern The Process of Software Development Budget Status from Rational Portfolio Manager Defect Glide Path from Rational ClearQuest Testing Status from Rational TestManager Requirements Volatility from Rational RequisitePro Code Churn from Rational ClearCase

Software Modernisation Notes

Software Modernisation Issues
To enable flexibility, IT must overcome challenges such as:
No electronic inventory of current IT assets
Complex application architectures
Skills lock-in
Islands of development
No flexibility for new investments

Rational Toolset
Use Rational ClearQuest Test Manager to manage your testing process integrating requirements from Rational RequisitePro
Use Rational Manual Tester to provide comprehensive testing of anything including printed documents, internal processes, etc.
Save time and improve quality by automating tests with Rational Functional Tester (RFT), including extensions for 3270, 5250, and VT
Ensure scalability of applications which expose existing assets in new ways (e.g. services) with Rational Performance Tester (RPT)
Identify vulnerabilities, privacy issues, quality exposures, and standards non-compliance with Rational AppScan

Application Transformation zSeries iSeries Unix Windows Automated Conversion Rational Application Developer (RAD) Application Environments Approach Rational Management Tools Refactoring Rational Business Developer (RBD) iSeries Deployment Windows Linux

Modernise Asset Management
Understand and analyse the impact of change across heterogeneous enterprise applications using X-Analysis
Manage assets across their lifecycle from design and creation to consumption and change with Rational Asset Manager (RAM)
Deploy and manage runtime services using WebSphere Service Registry & Repository (WSRR)

Spectrum of Options for Application Modernisation Existing Core Business Applications New UI refacing or rewriting Web browser UI Or Rich UI Modern Screens Portal Extract Design Re-Build New Application EGL Java ILE E G L Java COBOL Transformation/ Conversion Discovery and Analysis Refactoring “ Rationalized” Efficient Version of the Application Reusable Components or Services SOA

Application Analysis, Discovery and Maintenance
Objective and accurate forensics for impact analysis
System wide perspective
Visualisation
Drill-Down from high-level to detail
Non System/technology expert inclusion
Improved development quality and productivity
Share critical information accurately
Make large scale changes possible: field resizing

Automated Repository Generation Cross-Reference Data Data Model Data Source Data Base Programs Displays Existing System Business Rule Logic Business Logic Validation Calculations Secondary Reads Secondary Updates Batch Calls Data Model Data Dictionary Logical Files/Views Key Map Relationships Special Fields Cross-Ref Data All Objects All Source All Languages All Variables Automated Extraction and Refresh X-Analysis Repository

Business Rule Extraction Business Rule Narratives

Software Rewrites New IDE Tool Eclipse/Rational/ Visual Studio/EGL/ Plex/LANSA Discovery, Analysis & Maintenance X-Analysis X-Referencing & Documentation Relational Data Model Business Rule Logic Graphical Function Diagrams RPG as Pseudo Code Data Flow Charting UML& DDL Extraction RSx/Together/CA GEN Software Modeling Tools Activity, Use-Case & Class Diagrams Data Model Redesign Persistence CRUD SOA JSF/Java/RCP Web2.0/Ajax .Net/ASP/C# Silverlight/XAML PHP/MySQL X-Migrate

VB6 Modernisation
Automatic conversion to either .NET or JAVA

PowerBuilder Modernisation
PowerMigrator tool
Migration process:
1: Gathering requirements
2: Generate JSP
3: Generate Component Templates
4: Select, Slice and Move
5: Testing
6: Debug
7: Deploy

PowerBuilder Migration Architecture

Sample Banking Application Infrastructure
Sample internet banking application layers

Sample Banking Application Components

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Alan McSweeney
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Notes On Software Development, Platform And Modernisation

by Alan McSweeney

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