Performance evaluation of J2EE

Presented by:Presented by:Huahao Zhang (20256751)Huahao Zhang (20256751)

Henry Xu (20198718)Henry Xu (20198718)July 12, 2007

ECE750 Topic 11Component-Based Software Systems

Instructor: Ladan Tahvildari

Outline

1. IntroductionRelated background and terminologyThe problems and our study case

2. Our ApproachIntroduce the tools and environments The methods we used in the research

3. ResultsCurrent results we have achieved

4. SummarySummary of the methods and achieved results

1. Introduction

J2EEJ2EE 5ProblemsPetStore

J2EE

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

J2EE 5

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

Problems

Why J2EE1. Reduces development time2. Improves application performance (Really?)

Questions1. Does J2EE 5 improve application performance?2. What are the performance bottlenecks in J2EE5?

Study Case: Pet Store

What is Pet StoreAn online shopping demo built based on Java EEplatform

Why Pet Store1. The most popular J2EE

project for evaluation2. Source code available

2. Our approach

1. Setup J2EE 5 and deploy PetStore2.02. Analyze the MVC and other patterns3. Study the new Web2.0 techniques

Step 2 & 3 have been done by tracing the source code manually

4. Set up load testing environment5. Create test script and run load test6. Evaluate performance and find out the

bottlenecks in J2EE 5

Step1: Setup J2EE and deploy PetStore

Download and install the Java EE5 SDK The SDK includes Sun Java System Application Server 9

Install NetBeans 5.5.1 IDEDownload and deploy Pet Store 2.0 (jar file)Open the PetStore project in NetBeans, modify the configuration files and then build the projectAfter the Java database and J2EE app server have been started, we can access the PetStore through http://localhost:8080/petstore

Configuration files in PetStore

bp-project/build.properties (jdbc, j2ee home, username, password)

Step2 & 3: Analyze the MVC pattern and study the new Web2.0 techniques

NetBeans IDE debug mode

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

How to trace the source code

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

Step4: Setup load testing environment

Setup Load Runner 8.1Install Java profiler for NetBeans IDE

Step5: Create scripts and run load testing

Create the testing scriptsRun load testCollect testing results

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 resultsFind out the bottlenecks in J2EE

3. Current results

MVC architecture and Session Façade patternAjax (Asynchronous JavaScript and XML) JSF (Java Server Faces)JTA (Java Transaction API )JPA (Java Persistence API )

Model-View-Controller

Why MVC architecture?MVC is well-suited for interactive Web applicationsThe purpose of MVC is to separate the model from the viewChanges to the view can be implemented or even creates additional views

①HttpRequest

② mb.categories

③cf.getCategories

④getCategory()

⑤getItem()

⑥ge

tAddre

ss()

⑦ getResultList⑧

Category, Addr

⑨ Select .JSP

⑩HttpResponse (HTML)

View Controller

Model

Session Facade

Before Catalog Façade

After Catalog Façade

DemoModel View Controller applied in PetStore2.0

http://129.97.121.188:8080/petstore2.0

Web2.0 new feature: Ajax

What is AjaxA new web development technique for creating interactive web 2.0 applications

Why AjaxEnhances user experience( no waiting time)Client and server split MVC responsibilities

Internet services using AjaxGoogle, Youtube, Flickr, Amazon, etc

Ajax: Thin client and rich client

Classic web application model1. Thin client2. The server renders every-

thing

Ajax application model1. 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

Ajax: Synchronous and Asynchronous

Synchronous mode1. Browser sends requests to server2. When server is processing the request, client is waiting for response3. The whole page is refreshed

Ajax asynchronous model1. The Ajax engine creates requests 2. When server is processing, the User can continue other activities3. Only parts of the page is refreshed.

DemoAjax: Autocomplete in PetStore

http://129.97.121.188:8080/petstore2.0

Ajax: Autocomplete sequence

FacesServlet AutoCompleteBean

Ajax Engine

Send a HTTP request

WebBrowser Database

Search cities with ‘w’ being the first letter

Return results

The keyup() event

User

User types a ‘ w’

Continue other activies

Dispatch requests

City:

Return resultsHTTP

response in XML formatDecodes and

renders the XML results Display

cities

City:

4. Summary

Setup the J2EE 5 and deploy PetStore2.0Analyze the MVC model and patternsStudy the new Web2.0 techniquesSet up load test environmentCreate test script and run load testEvaluate performance and find out the bottlenecks in J2EE 5

References1. An Integrated Network Component Architecture Israel Ben-

Shaul, James W. Gish, and William Robinson, IEEE Software, Volume 15, Issue 5, pp. 79-87, September 1998

2. Introducing the Java Pet Store 2.0 Application, Early Accesshttp://java.sun.com/developer/technicalArticles/J2EE/petstore

3. Designing Enterprise Applications with the J2EE Platform, 2nd Edition, Sun Microsystems, 2002.

4. Designing Web Services with the J2EE 1.4 Platform: JAX-RPC, SOAP, and XML Technologies, Sun Microsystems, 2004.

5. Pro JSF and Ajax: Building Rich Internet Components, Jonas Jacobi and John R. Fallows, Apress, 2006.

6. Sun Developer Network (SDN) Referencehttp://java.sun.com/reference/blueprints/index.html

Q&A

Thank you!