Performance evaluation of J2EE

Transcription

1 ECE750 Topic 11 Component-Based Software Systems Instructor: Ladan Tahvildari Performance evaluation of J2EE Presented by: Huahao Zhang ( ) Henry Xu ( ) July 12, 2007

2 Outline 1. Introduction Related background and terminology The problems and our study case 2. Our Approach Introduce the tools and environments The methods we used in the research 3. Results Current results we have achieved 4. Summary Summary of the methods and achieved results

3 1. Introduction J2EE J2EE 5 Problems PetStore

4 J2EE What is J2EE A standard Java platform for developing N-tier enterprise and component-based applications

5 J2EE 5 What is new in J2EE 5 A simplified programming model More XML and JavaScript (Ajax) JPA (Java Persistence API )

6 Problems Why J2EE 1. Reduces development time 2. Improves application performance (Really?) Questions 1. Does J2EE 5 improve application performance? 2. What are the performance bottlenecks in J2EE5?

7 Study Case: Pet Store What is Pet Store An online shopping demo built based on Java EE platform Why Pet Store 1. The most popular J2EE project for evaluation 2. Source code available

8 2. Our approach 1. Setup J2EE 5 and deploy PetStore Analyze the MVC and other patterns 3. Study the new Web2.0 techniques Step 2 & 3 have been done by tracing the source code manually 4. Set up load testing environment 5. Create test script and run load test 6. Evaluate performance and find out the bottlenecks in J2EE 5

9 Step1: Setup J2EE and deploy PetStore Download and install the Java EE5 SDK The SDK includes Sun Java System Application Server 9 Install NetBeans IDE Download and deploy Pet Store 2.0 (jar file) Open the PetStore project in NetBeans, modify the configuration files and then build the project After the Java database and J2EE app server have been started, we can access the PetStore through

10 Configuration files in PetStore bp-project/build.properties (jdbc, j2ee home, username, password)

11 Step2 & 3: Analyze the MVC pattern and study the new Web2.0 techniques User accesses the PetStore through a web browser User clicks some links or input some text Web browser client sends HTTP requests to the PetStore web server Since the PetStore is run under debug mode in the NetBeans, we can debug the code step by step NetBeans IDE debug mode

12 How to trace the source code Set break points in source code Click a link (e.g. Map), then the application will hit the break points Use the step into, step over and run to cursor options to trace the code step by step Use the New Watch to trace the value of variants Draw diagrams by using the UML2.0 provided by NetBeans to help understand the relationship between each component or Java class

13 Step4: Setup load testing environment Setup Load Runner 8.1 Install Java profiler for NetBeans IDE

14 Step5: Create scripts and run load testing Create the testing scripts Run load test Collect testing results

15 Step6: Evaluate performance and find out bottlenecks Analyze testing results of web performance testing (from Load Runner) Analyze testing results of JavaBeans and Java components (from Java profiler) Draw diagrams and summarize test results Find out the bottlenecks in J2EE

16 3. Current results MVC architecture and Session Façade pattern Ajax (Asynchronous JavaScript and XML) JSF (Java Server Faces) JTA (Java Transaction API ) JPA (Java Persistence API )

17 Model-View-Controller Why MVC architecture? MVC is well-suited for interactive Web applications The purpose of MVC is to separate the model from the view Changes to the view can be implemented or even creates additional views

18 6 getaddress() 5 getitem() 4 getcategory() Model 3 cf.getcategories 2 mb.categories 7 getresultlist View Controller 8 Category, Addr 1 HttpRequest 10 HttpResponse (HTML) 9 Select.JSP

19 Session Facade Before Catalog Façade After Catalog Façade

20 Demo Model View Controller applied in PetStore2.0

21 Web2.0 new feature: Ajax What is Ajax A new web development technique for creating interactive web 2.0 applications Why Ajax Enhances user experience( no waiting time) Client and server split MVC responsibilities Internet services using Ajax Google, Youtube, Flickr, Amazon, etc

22 Ajax: Thin client and rich client Classic web application model 1. Thin client 2. The server renders everything Ajax application model 1. A new Ajax engine is added between the browser UI and the web server 2. A rich client, more logic is coded in JavaScript and run on the browser client

23 Ajax: Synchronous and Asynchronous Synchronous mode 1. Browser sends requests to server 2. When server is processing the request, client is waiting for response 3. The whole page is refreshed Ajax asynchronous model 1. The Ajax engine creates requests 2. When server is processing, the User can continue other activities 3. Only parts of the page is refreshed.

24 Demo Ajax: Autocomplete in PetStore

25 Ajax: Autocomplete sequence City: User Continue other activies User types a w Display cities WebBrowser The keyup() event Decodes and renders the XML results Ajax Engine Send a HTTP request HTTP response in XML format FacesServlet Dispatch requests Return results AutoComplete Bean Search cities with w being the first letter Return results Database City:

26 4. Summary Setup the J2EE 5 and deploy PetStore2.0 Analyze the MVC model and patterns Study the new Web2.0 techniques Set up load test environment Create test script and run load test Evaluate performance and find out the bottlenecks in J2EE 5

27 References 1. An Integrated Network Component Architecture Israel Ben- Shaul, James W. Gish, and William Robinson, IEEE Software, Volume 15, Issue 5, pp , September Introducing the Java Pet Store 2.0 Application, Early Access 3. Designing Enterprise Applications with the J2EE Platform, 2nd Edition, Sun Microsystems, Designing Web Services with the J2EE 1.4 Platform: JAX- RPC, SOAP, and XML Technologies, Sun Microsystems, Pro JSF and Ajax: Building Rich Internet Components, Jonas Jacobi and John R. Fallows, Apress, Sun Developer Network (SDN) Reference

28 Q&A Thank you!