Getting Started in the World of WebSphere; Real World Case Studies
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1 s Getting Started in the World of WebSphere; Real World Case Studies Paul Holm PlanetJ Corporation 2005 PlanetJ Corporation. All rights reserved.
2 What We'll Cover... How are Java and WebSphere Used Today? What Lessons Have Been Learned? Terminology of Java and WebSphere Worlds The Key Considerations When Starting a WebSphere or Java Project Tools Used to Create Applications
3 Java And WebSphere Usage Today
4 The Business Challenge Wabash National Leading supplier of Semi trailers & parts Large demand for customer information Order information and status Invoice, sales figures, etc... Back order parts and status Used trailer sales Warranty processing Information demands required a large labor pool for Customer Service reps Customers want information 24 X 7 Typical self-service application
5 The Business Solution Internet self-service" applications Customers can now access their account information 24x7 Reduction in customer service reps and labor costs Increased customer satisfaction Warranty claim processing 92% more efficient Skills developed with Java and WebSphere for future development
6 Solution Details
7 Solution Details (cont.)
8 Solution Details (cont.)
9 Solution Details (cont.) "SmartParts, Used Trailers, Warranty developed in WebSphere Application Server (WAS) Developed in Java using VisualAge 4.0, WSAD 5 Deployed to WebSphere 4.x running on iseries, later moved to WAS Express Uses SSL and authentication to secure data Accesses a J.D. Edwards ERP system for order and invoice information Uses iseries Native Abstract Windowing Toolkit for graphics
10 Solution Experiences WebSphere installation and administration was tricky More time spent on installation and configuration than on the initial application development! We needed to install: Apache HTTP Server WAS 4.0 NAWT PASE
11 Solution Experiences (cont.) WebSphere issues Fix packs need to be installed with care 4.x Advanced administrator console Performs slow Non-descriptive error messages WebSphere 6.x and WebSphere Express are better Easier installation and administration Lower CPW and memory requirements
12 Solution Experiences (cont.) Tips: Ensure your iseries has sufficient memory and CPU to run WebSphere V5R2 WAS Express (CPW: 300, 512MB) V5R2 WAS BASE (CPW: 750) o With EJB (CPW: 1000) If you have low CPW and memory, you ll find that WebSphere will run much faster on a Windows or LINUX Server WebSphere 5.0 and 6.x are easier to install and manage. Don t bother with any release below 5.0.
13 The Business Problem FlowServe Corporation Engineer top end mechanical pumps Needed solution to track and manage supplier purchase order system
14 The Business Solution Suppliers signon and view their purchase orders from a backend PRMS based ERP Suppliers are able to electronically: Confirm purchase orders Change delivery date Change delivery quantity Request price change for purchase order All changes are dynamically updated in DB2/400 and changes are ed to buyers
15 Connecting to Suppliers
16 The Business Problem Cybra Corporation Develops iseries Barcode Design Software Existing Solution was 5250 "Green Screen" Based Difficulties Competing with Window GUI Competitors
17 Solution Details Why Use Java? GUI needed for sales/marketing Platform Independence Architecture Java client server "desktop" application Complex Java graphics on client Extensive use of AS/400 RPG program via ProgramCall feature of AS/400 Toolbox for Java JDBC used for Database I/O
18 Solution Experiences Existing resources not viable Six month trial Using Existing RPG Staff o Missing skill and experience Early JDK releases were often buggy Java performance was an issue o Heavy memory and CPU usage o Java profiling used, JProbe is excellent Data Access via JDBC worked very well
19 Solution Details Results 260,000 lines of Java Eight months to develop (three people) JMagic is generally available o Next releases are in planning Very Successful project o Won IBM Developer project award o Sales Have Increased
20 Solution Details "JMagic"
21 Usage Summary Much of iseries Web development is focused on: Building Self Service Applications (90%) Allow customers to view their account information Allow vendors/suppliers to access inventory, purchase orders, and associated data to better optimize the procurement process Allow employees access via browser to sales data Building Internal EIS (10%) Management reports Instant access to real time data
22 Java And WebSphere Usage Terminology
23 Java and WebSphere Terminology Applications Programs which run stand-alone. These are "desktop" applications. Applets Dynamic and interactive programs that can run inside a Web page displayed by a browser enabled for Java. Servlets Programs that run inside request/response-oriented servers, such as Java-enabled Web servers, and extend them in some manner. JavaServer Pages (JSPs) Provides an easy way to access server-side components from Web pages by separating the presentation of dynamic content from the generation of that content. Enterprise JavaBeans (EJBs) Combines server-side components with distributed object technologies.
24 Using Servlets on iseries High Level Perspective 1 - Initiate servlet from Browser 2 - Load servlet 3 - Access resources 1 HTTP Server Browser Internet/ Network 2 Java Servlet 3 Resources DB2 & RPG
25 What are JavaServer Pages? The JavaServer Pages technology is a way to dynamically generate HTML on the server side Use HTML files HTML tags JavaServer Pages HTML tags Java as a scripting language A JavaServer Pages file has the extension.jsp Calls reusable components that reside on the server JavaBeans servlets browser <html> <userbean> </html> compiled page object web page
26 Enterprise JavaBeans A Java specification from Sun Microsystems which is part of the J2EE specification Component support for server-side business logic Binary Portability Reusability High-level, declarative interfaces for: Security Transactions Persistence Part of WebSphere Base and Network Deployment Editions EJB support not included in WebSphere Express Reduced complexity and effort for application developer
27 Enterprise JavaBeans (cont.) GOTCHA WARNING: EJB are Not All They Are Cracked Up To Be In Actual Use Current Issues Include: Performance Productivity Stability Maintenance TIP: Perform a "Proof Of Concept" Project Prior To Wide Spread Use of EJBs
28 What is an Application Server? Emerging software for applications which: Manage browser and Java-based client sessions Provide server-side business logic (Servlets/JSPs/EJBs) Connect to back end computing resources for data and transaction processing Most commonly used Application Servers: WebSphere (Express, Base, Network Deployment) Tomcat WebLogic
29 Considerations When Starting a Project
30 Planning a Java or WebSphere Based Project? Things to consider: Usage of Java Education/Staffing Tools Technical Architecture Many things to consider...
31 When to Use Java Consider using Java for: Graphical User Interfaces Browser based UI (Servlet's and JSP's) Self service applications HTML not as robust as Java GUI's Self service Web applications Strategic application development direction Don't Use Java For: Performance intensive applications
32 Education and Skills Technology Months to Basic Capabilities Months to High Productivity Comments Java Basics Need to assign appropriate work! WebSphere Studio or ECLIPSE Need to assign appropriate work! OO Architect Need heavy design and project experience. Servlets/JSP Prereq is Java Basics. EJB Prereq is Java, OO, RDB, JDBC, Experience.
33 Education and Skills Tips! You need a mix of experience levels Use highly experienced for design and mentoring Use novices for coding and testing Experience is invaluable You need to know what works and what doesn't Existing/legacy skills are still valuable Database design and performance are crucial RPG/Cobol backend code reused via Toolbox APIs
34 Tools for Development
35 Tools for Development Integrated Development Environments WebSphere Studio (WSDC for iseries) Strategic direction for IDEs Based on Eclipse but is fee based Excellent integration with AS/400 ( Java Toolbox) Eclipse Eclipse is free and open source Other IDE's NETBEANS by Sun (
36 Tools for Development (cont.) Design Tools Rational Rose Only use if you have experience/skill with it Carries a big learning curve and is expensive Tip: Keep development environments as simple as possible It is easy to get "overwhelmed" with the cumulative learning curves
37 Tools for Development (cont.) 4GL and Generator Tools PlanetJ WOW (Web Object Wizard) Mrc, BCD, Magic Software Web Front Ends WebSphere WebFacing Generates HTML from DDS display files WebSphere Host Publisher Generates HTML on the FLY! Screen Scrapers Convert screens to HTML
38 Project Tips! Architecture Greatest importance to a project Demands a heavy investment in time and skill Architecture effects everything! o Performance o Scalability o Flexibility o Maintainability
39 Project Tips: Architecture (The UI) User Interface Servlet/JSP (Web-based) Excellent portability and deployment characteristics UI not as robust as desktop applications Java Application (JFC) Rich and powerful UI Client install and updates needed Java Applets Rich UI but portability and performance issues
40 Project Tips: Architecture (Business Logic) Middle Tier (Business Logic) EJB is a strategic technology EJB adoption has been low Many experts do not recommend EJBs Requires WebSphere Advanced ($) Handles DB I/O, transaction, remote calls Custom Architecture Project specific classes created Need to deal with persistence yourself OO design skills are critical here
41 Project Tips: Architecture (Database Layer) Backend (Database) EJB Container Managed Persistence EJB has support for generating JDBC Performance issues exist today Custom JDBC Hand written by developers Can be difficult and nonproductive Not recommended for large projects JDBC Generators (RDB - OO Mapping) VAJ Persistence Builder PlanetJ DataEngine (WOW), Top Link, Hibernate and others
42 The 5 Key Points to Take Home 1. Many successful Java and WebSphere projects have been completed. Companies are saving large amounts of money with SELF SERVICE applications! 2. Technologies involved are still maturing but are very strategic. 3. It is important to consider: Education/Skills Tools Architecture 4. Consulting and mentoring can help grow skills, produce a solid infrastructure, and increase productivity 5. Start small, grow experiences before taking on larger projects
43 Additional Resources Free WOW download links The Server side Excellent insight into development issues WebSphere Studio Zone W3Schools (free learning tools)
44 Your Turn! Questions?
45 Contact Info Paul Holm PlanetJ Corporation
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