Web Dynpro (WD) is a web application technology developed by

SAP SE Sap is a fluid transported in xylem cells (vessel elements or tracheids) or phloem sieve tube elements of a plant. These cells transport water and nutrients throughout the plant. Sap is distinct from latex, resin, or cell sap; it is a ...

that focuses on the development of server-side business applications. For modern releases (for instance as of

NetWeaver SAP NetWeaver is a software stack for many of SAP SE's applications. The SAP NetWeaver Application Server, sometimes referred to as WebAS, is the runtime environment for the SAP applications and all of the mySAP Business Suite runs on SAP WebA ...

750, software layer SAP_UI) the user interface is rendered according to the

HTML5 HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and final major HTML version that is a World Wide Web Consortium (W3C) recommendation. The current specification is known as the HTML ...

web standard. Since

Netweaver SAP NetWeaver is a software stack for many of SAP SE's applications. The SAP NetWeaver Application Server, sometimes referred to as WebAS, is the runtime environment for the SAP applications and all of the mySAP Business Suite runs on SAP WebA ...

754 (software layer SAP_UI, ABAP Platform 1909) a

touch In physiology, the somatosensory system is the network of neural structures in the brain and body that produce the perception of touch ( haptic perception), as well as temperature ( thermoception), body position (proprioception), and pain. It ...

enabled user interface is available. The newly released versions usually follow the SAP Fiori design principles. One of its main design features is that the

user interface In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine f ...

is defined in an entirely declarative manner. Web Dynpro applications can be developed using either the

Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...

(Web Dynpro for Java, WDJ or WD4J) or

ABAP ABAP (Advanced Business Application Programming, originally ''Allgemeiner Berichts-Aufbereitungs-Prozessor'', German for "general report preparation processor") is a high-level programming language created by the German software company SAP SE. ...

(Web Dynpro ABAP, WDA or WD4A) development infrastructure.

Overview

The earliest version of Web Dynpro appeared in 2003 and was based on

. This variant was released approximately 18 months before the

variant. As of 2010, the Java variant of Web Dynpro was put into maintenance mode. WD follows a design architecture based on an interpretation of the MVC design pattern and uses a

model driven development Model-driven engineering (MDE) is a software development methodology that focuses on creating and exploiting domain models, which are conceptual models of all the topics related to a specific problem. Hence, it highlights and aims at abstract re ...

approach ("minimize coding, maximize design"). The Web Dynpro Framework is a server-side runtime environment into which many dedicated "hook methods" are available. The developer then places their own custom coding within these hook methods in order to implement the desired business functionality. These hook methods belong to one of the broad categories of either "life-cycle" and "round-trip"; that is, those methods that are concerned with the life-cycle of a software component (i.e. processing that takes place at start up and shut down etc.), and those methods that are concerned with processing the fixed sequence of events that take place during a client-initiated round trip to the server. Web Dynpro is aimed at the development of business applications that follow standardized UI principles, applications that connect to backend systems and which are scalable. Key Capabilities * Declarative way of development: Web Dynpro offers a graphical and declarative means of UI development. UI controls, building blocks, views and windows are modeled, and the business logic can be coded separately. * Separation of user interface and business logic: One advantage of Web Dynpro over

SAP GUI SAP GUI is the graphical user interface client in SAP ERP's 3-tier architecture of database, application server and client. It is software that runs on a Microsoft Windows, Apple Macintosh or Unix desktop, and allows a user to access SAP funct ...

is the separation between business logic and user interface, and the structured development process with less implementation effort. * Support of stateful application: The state of the application is kept in the back-end. This leads to a reduced data transfer from

server to browser and vice versa. Regarding Web Dynpro ABAP there is only one programming language (

) and only one system necessary. Therefore, development can be easier and cost efficient.

References

External links

* *{{cite web , title=SAP Community - Web Dynpro Java , url=https://community.sap.com/topics/web-dynpro-java SAP SE Web applications User interfaces Year of introduction missing Java platform software