Calling XSJS Service Using SAP UI5 _ SCN

2/10/2014

Calling XSJS Service using SAP UI5 | SCN Getting Started New sletters

Welcome, Guest

Login

Store

Search the Community

Register

Products

Services & Support

About SCN

Downloads

Industries

Training & Education

Partnership

Developer Center

Lines of Business

University Alliances

Events & Webinars

Innovation

Activity

Communications

Actions

Brow se

SAP HANA Developer Center

Calling XSJS Service using SAP UI5 Posted by Vivek Singh Bhoj in SAP HANA Developer Center on Jun 20, 2013 8:41:19 PM Tweet

Previous Next

Hi Everyone, In the blog SAP HANA Extended Application Services( http://scn.sap.com/community/developercenter/hana/blog/2012/11/29/sap-hana-extended-application-services) by Thomas Jung, he showed us lots of things about XS development and one of them was how to create and extend Server Side JavaScript and it was explained beautifully in the video : http://www.youtube.com/watch?v=ckw_bhagvdU At the end in the above video, Thomas told us about Calling the XSJS Service From the User Interface : Here i would like to tell how to create the UI files and then call xsjs service step by step

postpost

1. We will go to Project Explorer tab in SAP HANA Development perspective and then R-Click and select Other:

2. Select SAP UI5 Application Development and then select Application Project:

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

1/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN

3. We will enter project name and select Desktop for rendering the ui on our desktop and also select create an initial view so that wizard creates a view for us

4. Enter the name of the View that we need to create Select JavaScript rendering for our purpose

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

2/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN

5. We found that wizard created three objects for us: index.html XSUI.controller.js XSUI.view.js In index.html file we will enter the full path of Source as 01. src="/sap/ui5/1/resources/sap-ui-core.js"

6. After that enter the following code in XSUI.view.js file 01. 02. 03. 04. 05. 06. 07. 08. 09. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.

sap.ui.jsview("xsui.XSUI", { getControllerName : function() { return "xsui.XSUI"; }, createContent : function(mController) { var mPanel = new sap.ui.commons.Panel().setText("XS Service Test - Multiplication"); mPanel.setAreaDesign(sap.ui.commons.enums.AreaDesign.Fill); mPanel.setBorderDesign(sap.ui.commons.enums.BorderDesign.Box); var mlayout = new sap.ui.commons.layout.MatrixLayout({width:"auto"}); mPanel.addContent(mlayout); var V1 = new sap.ui.commons.TextField("val1",{tooltip: "Value #1", editable:true}); var V2 = new sap.ui.commons.TextField("val2",{tooltip: "Value #2", editable:true}); var mResult = new sap.ui.commons.TextView("result",{tooltip: "Results"}); var mEqual = new sap.ui.commons.TextView("equal",{tooltip: "Equals", text: " = "}); var mMultiply = new sap.ui.commons.TextView("multiply",{tooltip: "Multiply by", text: " * "}); V1.attachEvent("liveChange", function(mEvent){ mController.onLiveChangeV1(mEvent,V2); }); V2.attachEvent("liveChange", function(mEvent){ mController.onLiveChangeV2(mEvent,V1); });

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

3/11

2/10/2014 20. 21. 22. 23. 24.

Calling XSJS Service using SAP UI5 | SCN mlayout.createRow(V1, mMultiply, V2, mEqual, mResult ); return mPanel; } });

7. After that enter the following code in XSUI.controller.js file : 01. 02. 03. 04. 05. 06. 07. 08. 09. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37.

sap.ui.controller("xsui.XSUI", { onLiveChangeV1: function(mEvent,V2){ var aUrl = '../../../Services/Func.xsjs?cmd=multiply'+'&n1='+escape(mEvent.getParameters().liveValue)+ jQuery.ajax({ url: aUrl, method: 'GET', dataType: 'json', success: this.onCompleteMultiply, error: this.onErrorCall }); }, onLiveChangeV2: function(mEvent,V1){ var aUrl = '../../../services/Func.xsjs?cmd=multiply'+'&n1='+escape(V1.getValue())+'&n2='+escape(mEvent.getParameters().liveValue); jQuery.ajax({ url: aUrl, method: 'GET', dataType: 'json', success: this.onCompleteMultiply, error: this.onErrorCall }); }, onCompleteMultiply: function(mt){ var mResult = sap.ui.getCore().byId("result"); if(mt==undefined){ mResult.setText(0); } else{ jQuery.sap.require("sap.ui.core.format.NumberFormat"); var oNumberFormat = sap.ui.core.format.NumberFormat.getIntegerInstance({ maxFractionDigits: 10, minFractionDigits: 0, groupingEnabled: true }); mResult.setText(oNumberFormat.format(mt)); } }, onErrorCall: function(jqXHR, textStatus, errorThrown){ sap.ui.commons.MessageBox.show(jqXHR.responseText, "ERROR", "Error in calling Service" ); return; } });

8. Now we will save all the files and share the project

9. Now Select SAP HANA Repository:

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

4/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN

10. Inside the repository select the folder where you would like to share it : I selected UI5 folder here

11. Now we will commit and activate our UI5 project :

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

5/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN

12. As we share our XSUI project in UI5 folder in the repository, so now we can see that in our project explorer also :

13. Now in Services folder we will create Func.xsjs file that we have used in our Controller and View in XSUI project.

14. Now enter the following code in Func.xsjs file : 01.

function Multiply(){

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

6/11

2/10/2014 02. 03. 04. 05. 06. 07. 08. 09. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.

Calling XSJS Service using SAP UI5 | SCN var body = ''; var n1 = $.request.parameters.get('n1'); var n2 = $.request.parameters.get('n2'); var ans; ans = n1 * n2; body = ans.toString(); $.response.setBody(body); $.response.status = $.net.http.OK; } var a = $.request.parameters.get('cmd'); switch (a) { case "multiply": Multiply(); break; default: $.response.status = $.net.http.INTERNAL_SERVER_ERROR; $.response.setBody('Invalid Command: '+a); }

15. In the browser enter address : http://ipaddress:8000/path/index.html

As in the aboveexample we have used JavaScript, JSON, Ajax and JQuery, so i would also like to tell you some basics about them First i will start with JavaScript JavaScript is a Object based Scripting language. It is not a Object Oriented language. • Client-side JavaScript allows an application to place elements on an HTML form and respond to user events such as mouse clicks, form input, and page navigation. • Server-side JavaScript allows an application to communicate with a relational database, provide continuity of information from one invocation to another of the application, or perform file manipulations on a server. Features: JavaScript is very light language JavaScript supports only supports data type but doesn't support variable type. For Example: In Java or C++, if we define a variable of integer type we will define it as : 01. int a; // so 'a' cannot hold anything other than integer But in case of JavaScript, we only define: 01. var a; // here 'a' can be a string an integer or anything else 02. a = hello; // 'a' becomes string 03. a = '10'; // here 'a' becomes an integer JavaScript doesn't have Keywords like Class, Private, Public but there are different ways through which we can make an object Public or Private and we can even use Inheritance concept in JavaScript through the use of prototype and inherit from. To learn more about JavaScript, please visit http://www.w3schools.com/js/ or http://www.javascriptkit.com/ SAP HANA has JavaScript editor that includes the JSLint open-source library, which helps to validate JavaScript code. For debugging purpose: We can use SPA HANA debug perspective or any browser like Chrome and Mozilla Firefox. Chrome has default JavaScript debugger and for Mozilla, we can download a plugin called Firebug. There is also a free online tool called jsfiddle that can be used to create, debug and run your JavaScript code along with HTML and CSS. jsfiddle : http://jsfiddle.net/

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

7/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN

Now moving on to JQuery : JQuery is a JavaScript Library and it simplifies our JavaScript Coding as we don't need to write many lengthy codes. In the OPenSAP course in Week 4 Unit 3 example a JQuery function fadeout() was used on Button. To learn more about JQuery, visit http://www.w3schools.com/jquery/ or http://learn.jquery.com/ Now about JSON : Well JSON stands for JavaScript Object Notation. It is a light weight data interchange format and it is preferred over XML because: In XML, Parsing is difficult and XML doesn't support rich data type( everything is written in the form of string ) Other benefits of JSON are that : Data is typeless and values can be assigned dynamically. Its Syntax is written in key and value pair For Example => User(Key) : Name(Value) We can use eval and JSON.parse functions to convert JSON String into JavaScript string. JSON.parse is preferref over eval because of the following reason : When we use eval to parse JSON data, eval is always active and it might be used to create malicious data that can be harmful to our sources. For learning JSON visit : http://www.w3schools.com/json/default.asp Finally AJAX : AJAX stands for Ashynchronous JavaScript and XML

It is one of the Web 2.0 standards and is used by web applications to send data to and retrieve data from a server asynchrously without interfering in the display and beahaviour of the existing page. It runs completely independent of the browser and no plugins are required. Google Suggest was the very first example of using AJAX. In most of the payment sites we generally see " Please Wait! Your Order is being processed" - this is done through the help of AJAX only. One of the sites from where we can download those moving GIFs for our web design is : http://ajaxload.info/ For learning AJAX visit : http://www.w3schools.com/ajax/ Thank You for reading the Blog. As this is my very first Blog so i would like to get feedback

6678 View s

Topics: database

Average User Rating (14 ratings)

Tweet

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

8/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN

17 Comments Benedict Vasanth Jun 20, 2013 9:52 PM

Seriously, is this your first blog? The blog was exceptional and I think anybody who reads this blog would want to go out and try it out. Good luck and we expect more!!! You have raised the bar with your very first blog so keep the future ones as simple and interesting as this one. Benedict Like (1)

Vivek Singh Bhoj Jun 21, 2013 5:03 AM (in response to Benedict Vasanth)

Hi Benedict, Thanks for such appreciating and kind words This has given me alot of confidence. I would try to write more blogs and will try my best to keep them informative and simple Like (1)

David Watson Jun 30, 2013 8:47 PM

Vivek, I agree with Benedict and hope that you will proceed with similar efforts. You are probably well aware of the on-going openSAP course "An Introduction to Software Development on SAP HANA". In case not, wanted to mention that the course features over 30 videos delivered by Thomas Jung. Many would likely benefit from your approach. Ample material! Will post a link in the course forum to your Blog post. David Like (1)

Vivek Singh Bhoj Jul 1, 2013 5:55 PM (in response to David Watson)

Hi David, I am well aware of OpenSAP course and i have also been following it closely. Like (0)

Luis Soares Jul 17, 2013 4:39 PM (in response to Vivek Singh Bhoj)

So closely that you make a copy of it... Shame Like (0)

Vivek Singh Bhoj Jul 17, 2013 4:48 PM (in response to Luis Soares)

Hi Luis, In the first line, i have clearly mentioned that this is based on Thomas's Video shown in Youtube that was out last year - if you check that video no code was mentioned. And i created this blog before the Week 5 Material was released. Like (1)

Luis Soares Jul 18, 2013 9:55 AM (in response to Vivek Singh Bhoj)

Ok. Then it was my mistake and so I apologize. Like (1)

Raj Kumar Salla Jul 23, 2013 10:42 PM

Hi Vivek, Really a nice blog from you. Keep up the good work. I never tried this as I am not good at JAVA related stuff. Regards Raj Like (1)

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

9/11

2/10/2014

Calling XSJS Service using SAP UI5 | SCN Vivek Singh Bhoj Jul 24, 2013 1:32 PM (in response to Raj Kumar Salla)

Thanks Raj! JavaScript is different from Java and is much easier to learn. Very less keywords are used here. You should give it a try someday.... Like (0)

Kamal Mehta Aug 5, 2013 11:22 AM

Nice one Vivek !!!!!!!!! Keep it up . Could have been better if you could provide some explanation on the code as well. Thanks Kamal Like (1)

Vivek Singh Bhoj Aug 5, 2013 11:49 AM (in response to Kamal Mehta)

Hi Kamal, I didn't explain code because it would have made blog even more lengthy, but as you said

i could have at least added comments in the code. Next time onwards going to keep this in mind. Regards, Vivek Like (0)

Kamal Mehta Aug 5, 2013 1:35 PM (in response to Vivek Singh Bhoj)

Thanks Vivek. This would help learn the basics about the code as well. Regards Kamal Like (0)

Christoph Pohl Aug 15, 2013 11:33 AM

Nice write-up! Like (1)

Ramanjaneyulu Korrapati Oct 13, 2013 2:11 PM

Good command on code. Good content. Thanks for your efforts. Like (1)

Vivek Singh Bhoj Oct 13, 2013 2:16 PM (in response to Ramanjaneyulu Korrapati)

Thanks a lot Raman Like (1)

Sakthivel Elango Feb 3, 2014 7:00 AM

Why are you getting the value of request parameters 'num1' & 'num2' , when you're passing the value through parameters 'n1' & 'n2' ? Like (0)

Vivek Singh Bhoj Feb 3, 2014 12:43 PM (in response to Sakthivel Elango)

Hi Sakthivel, It should be 'n1' and 'n2' only - thanks for pointing out I was making some changes in my blogs and this is what happens when you don't pay attention on what you are editing Regards, Vivek Like (1)

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

10/11

2/10/2014

Site Index Privacy

Calling XSJS Service using SAP UI5 | SCN

Contact Us Terms of Use

SAP Help Portal Legal Disclosure

Copyright

http://scn.sap.com/community/developer-center/hana/blog/2013/06/20/calling-xsjs-service-using-sap-ui5

Follow SCN

11/11