Best-Practices for Optimizing Web Dynpro Java Appl...

BeGanz · ‎12-01-2008

In this WebLog I want to announce the first single-source knowledge resource on Web Dynpro Java Performance Guidelines available on SDN:

Best Practices for Optimizing Web Dynpro Java Application Performance

In this presentation hand-out document you can find a collection of best practices, dos & don'ts or tips & tricks to optimize your Web Dynpro application performance in respect of enhanced UI responsiveness on client side and minimized memory consumption on server side. The performance guide applies to SAP NetWeaver CE 7.11 EhP1and partially to SAP NetWeaver 04 and 7.0 (rules are marked correspondingly).

The Web Dynpro Java Performance Guidlines were first presented at SAP TechEd '08, llecture COMP204 on "Best Practices for Optimizing Web Dynpro Java Application Performance". Watch full COMP 204 session video with your Virtual SAP TechEd Content Subscription.

Enjoy Web Dynpro Java,

Bertram Ganz, Senior Product Specialist, NW Core UI&AM F OPS, SAP AG

Presentation Abstract

In this new presentation you learn the most effective best-practices to optimize the performance of your Web Dynpro Java application regarding an enhanced UI responsiveness on client side and minimized memory consumption on server side.

The given recommendations and best-practice rules focus on different aspects related to user interface design, component granularity, component and controller lifecycle management, controller contexts, on-demand resources, table paging or models likethe Adaptive RFC model.

This session is based on Web Dynpro Java in SAP NetWeaver CE 7.11 EhP1 so that performance rules related to the newest Web Dynpro Java Ajax features like the different flavors of suggestion, asynchronous input validation or the new UI element event onChange are also considered.

Table of Content

Overview of Web Dynpro Java Performance Aspects

End-to-End Time: Who eats my TIME?

On Server Side: Who eats my MEMORY?

Another Performance Flavor: TCD* and Development Efficiency

Main Objective: „Know to Tackle Web Dynpro Java Performance Gremlins as a Developer"

Web Dynpro Java Performance Guidelines

Focus: User Interface

Apply Container Layouting Rules and - Avoid Deep Container Nesting

Exchange Transparent Root Container UI Element with other Container Types in CE 7.1

Load Large Trees on Demand - Use New Table Selection Change Behavior

Make UI Containers Invisible Instead of UI Elements

Adobe Interactive Forms Dos and Don'ts (1, 2)

Focus: Programming Model

Implement wdDoModify() Hook Judiciously - Use Context for Fine Grain UI Manipulations

Optimize Controller Lifespans - How to Determine a View Controller's Lifespan

Correctly Initialize Component Controllers - Use Additional Custom Controllers

Create Static URLs for Static MIMEs

Focus: Controller Contexts

Minimize Generation of Typed Context APIs - Avoid Context Mapping if not Needed

Don't Declare Context Model Nodes and Attri-butes NOT used for Data Binding Purposes

Apply Alternative Techniques to Share Data Across Controller and Component Borders

Prefer Singleton to Non-Singleton Context Nodes

When to Define Non-Singleton Context Nodes

When to Use the Validate-By-Rendering Technique (1, 2)

Create Resources on-Demand to Download Large or Many MIME Files

Focus: Componentization

Finding the Best Web Dynpro (Development) Component Granularity

Accelerate Single Development Cycles

Apply Inverse Search Function to Resolve Usage Dependencies

Split your Web Dynpro Application into separate Web Dynpro DCs

Apply Component Interface Definitions For Loose Component Coupling (Strategy Pattern)

Optimize Component Lifecycle Management

Favor Java Utility Classes over Faceless Web Dynpro Components

Read SPJ Article Series on Component-Based Architecture in Web Dynpro Java

Focus: Models

Adaptive RFC Model Dos and Dont's (1, 2)

Focus: New Ajax Functions

New Suggestion Support in CE 7.11 EhP1 Potentially Increases Number of Roundtrips!

Asynchronous Input Validation in CE 7.11 EhP1 - Increases Number of Server Roundtrips!

New onChange Event in CE 7.11 EhP1 - Increases Number of Server Roundtrips!

Special: Web Dynpro Table Paging

Apply Web Dynpro Java Table Paging Unleashed: Optimizing Heavy Table Performance to Reduce Memory and to Enhance Client Performance

Table Paging Solution Architecture Digram

Performance Tools Overview

Available CTRL+SHIFT+ALT Shortcuts

Show detailed HTML DOM analysis

Show „Stacked" Performance Infos for ALL Roundtrips in Running Client Session

Analyzing Web Dynpro Java Application Performance with a Simple URL-Parameter

Reporting the Memory Consumption of a Web Dynpro Application in Browser Window

Summary

Main Objective: „Know to Tackle Web Dynpro Java Performance Gremlins as a Developer"

Now You know „How to tackle the Web Dynpro Java Performance Gremlins"