• SAP Web Shop: Introduction

From: http://sitestree.com/?p=5005
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Post Data:2009-04-25 13:54:21

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• Calling an SAP Function Module from Java
• RFC Interfaces and Java Proxy
• Example: Using Generated Proxies to Call Function Modules
• JCO and Function Module
• JCO Function: java

From: http://sitestree.com/?p=4988
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Post Data:2010-10-22 20:50:44

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• Introduction to ERP and SAP
  • Enterprise Resource Planning (ERP) – helps to manage and operate business processes effectively and in an integrated/co-ordinated fashion. The integration nature helps businesses to understand their business/business processes more effectively and make decision intelligently
  • ERP makes use of IT to integrate all business processes into a single co-ordinated system
  • In ERP only one integrated database is used that is shared among all the business departments. Operational data from all business departments such as production, sales, finance, hr, customer service, SCM come into the same database. Hence, data are more consistent and complete. The database may not be in one single physical location, but can be distributed and integrated database
  • As you get all the information in the same place, generating cross-department reports, applying BI to these data become easier and more meaningful. Getting overall picture of the company becomes much easier (than multiple DBMS). It helps the management take important decisions and plan the company future more effectively
  • If all the departments were using separate databases for their operations, it would be harder to generate cross-functional reports, and get overall picture of the company. Merging different databases also would become a big headache.
  • Additionally, Many jobs require inter-department communications. ERP makes such communication easier/faster, more manageable
  • If all the departments were using separate databases/systems, interdependent activities would require to insert data (relevant to the dept) in all the databases separately – more work, require more time, more error prone. If a change is needed, the change needs to be done in multiple places – again the three mores. The departments would require to submit individual reports to the management – more difficult for the management to understand the areas of the interdependent activities
  • To address such issues ERP came into play
  • Evolution: MRP, MRP II, ERP
  • MRP: Materials Requirements Planning: 1960: To control inventory management. Overstock or lower-stock inventory control
  • MRP II: Manufacturing Resource Planning: 1970s: for manufacturing companies to automate production, sales, marketing, HR, Finance: focused manufacturing businesses only.
  • ERP: 1990s: For standard business organizations addressing any type of business.
• SAP
  • SAP: Systems, Applications Products: Was established in 1972
  • Versions of SAP: R/2 (late 1970s), R/3 (early 1990), mySAP ERP (late 1990), standard business products, industry specific products, for small and mid-size enterprise solutions
  • R/2 for mainframe platform with character based clients, R/3 improved R/2 to support diversified and changing technologies, mySAP ERP further improved R/3 to support ebusiness
  • mySAP ERP: has many modules such as Finance, HR for specific departments, also integrates related modules
  • mySAP ERP features: process auditing, centralized system management, centralized operation management, integrated and modular model, integration with non-SAP systems with netweaver platform, e-business support
  • mySAP ERP solutions: CRM (Customer Relation Management), ERP (Enterprise Resource Planning), SCM (Supply Chain Mgmt), SRM (Supplier Relationship Management), PLM (Product Lifecycle Management)
  • SAP solutions for small and mid size enterprises (SMEs): SAP Business One, mySAP All-in-One
  • Industry specific solutions: Aerospace and Defense, Oil and Gas, Banking, Media
• mySAP:
  • R/3 introduced GUI for SAP. Latest version for SAP R/3 is the Enterprise Central Component (ECC) = core component of mySAP ERP.
  • mySAP: Three tier architecture: presentation, application, data. Presentation: GUI, application: processes, Data: storage and manipulation of data
  • SAP tasks: functional, technical
  • Functional: end user carry out an operation
  • Technical: Administrators and programmers – update SAP system
  • each task is considered as a transaction, each transaction is associated with a transaction code
  • ME21 – functional – purchase order, SE38 – technical – work with ABAP (Programming Language for SAP) editor
  • SAP Data: Organizational Structure, Master Data : needs to be created before a SAP systems come into operation.
  • Organizational Structure – structure of the organization – people – departments. Master: example: a list of suppliers – change more frequently than organizational structure
  • Reporting in SAP R/3: creating report programs (create with ABAP), generating report lists – programmed report programs

From: http://sitestree.com/?p=4980
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Post Data:2010-05-03 12:18:18

    Shop Online: <a href='https://www.ShopForSoul.com/' target='new' rel="noopener">https://www.ShopForSoul.com/</a>
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• J2EE for SAP

From: http://sitestree.com/?p=4976
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Post Data:2007-07-05 23:54:32

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• SAP: Career Prospects
• SAP:Blog:SAP:Microsoft

From: http://sitestree.com/?p=4962
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Post Data:2011-03-30 13:12:24

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• Forum: SAP Developer Network Forum
• SAP Developer Network

From: http://sitestree.com/?p=4959
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Post Data:2007-12-15 01:40:15

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• SAP JCo Overview
• SAP JCo Functions
• SAP JCo Architecture
• SAP JCo Application Scenarios
• SAP JCo Installation
• SAP JCo Client Programming
• SAP JCo Server Programming
• SAP JCO Connector

From: http://sitestree.com/?p=4957
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Post Data:2010-05-22 09:51:45

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• Ajax: dynamically changes a portion of the current web-page without refreshing the total web-page. Resembles the way IFrame works. So far I know, google uses IFrame to display/refresh maps in web-pages
• XMLHttpRequest is the object that serves the purpose of Ajax
• The way it works: create an instance of the XMLHttpRequest object, send request to the back-end web-page that will do some processing and perhaps return some data, receive the response data, dynamically change the content of the target area, you may need to get a reference to the target area using DOM, after sending request – you have to wait for the response to come back
• create an instance of the XMLHttpRequest object: It varies for the different browsers. IE provides ActiveX Control for the purpose. A sample code can be as follows:

•   function getAjaxObject(){    var ajaxObject = false;    if (window.XMLHttpRequest){         ajaxObject = new XMLHttpRequest();    }else if (window.ActiveXObject) {      try{        ajaxObject = new ActiveXObject("Msxml2.XMLHTTP");      }catch(e){         try{          ajaxObject = new ActiveXObject("Microsoft.XMLHTTP");         }catch(e){           ajaxObject = false;         }      }    }    return ajaxObject;   }

• XMLHttpRequest has three core components. onreadystatechange – event to notify response has come or identify server activity, open – method , send method
• use of onreadystatechange

  if (ajaxObject){//takeAction - reference to a function   ajaxObject.onreadystatechange = takeAction; }

• Open method specifies the server side script to handle the request, data to send to the server, method of sending (GET, POST) : Required: type of request (first argument), location of the file in the server (2nd argument)
• Open method: third argument: true = processing will be done asynchronously, false = synchronous processing – browser will stop processing until response comes [true is usually better]
• send : send method initiates the request : also passes data to the server
• For GET method the argument can be set to null, for POSt method the argument can be a query string such as “id=500&name=keith&age=18”
• use setRequestHeader() – to provide metadata
• Sample code:

   var ajaxObject = getAjaxObject(); if (ajaxObject ){    ajaxObject.onreadystatechange = takeAction;     ajaxObject.open("POST","file.jsp", true);    ajaxObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded");    ajaxObject.send("id=500&name=keith&age=18"); }

• How to receive and process the response:
• The readyState property indicates the current status of the request. 0 – Uninitialized, 1 – Loading, 2 – Loaded, 3 – interactive, 4 – complete
• each time the value of readyState changes onreadystatechange – event is triggered. At value 4, we can collect the response and change the web-page dynamically
• Sample:

   function takeAction(ajaxObject){  if (ajaxObject.readyState == 4) {     //do something with the response  } }

• status is another property to consider – it indicates the status of sending request like 404 – not found, 200 = success, 304 = not modified
• The prev function

   function takeAction(ajaxObject){  if (ajaxObject.readyState == 4) {     if (ajaxObject.status == 200 || ajaxObject.status == 304){ //response was sent succesfully           //do something with the response     }  } }

• responseText is the response from the server

•  function takeAction(ajaxObject){  if (ajaxObject.readyState == 4) {     if (ajaxObject.status == 200 || ajaxObject.status == 304){ //response was sent succesfully           //do something with the response          alert(ajaxObject.responseText);     }  } }

• responseXML can be used when the response was sent as xml and the response header is “text/xml”
• All together

    function getAjaxObject(){    var ajaxObject = false;    if (window.XMLHttpRequest){         ajaxObject = new XMLHttpRequest();    }else if (window.ActiveXObject) {      try{        ajaxObject = new ActiveXObject("Msxml2.XMLHTTP");      }catch(e){         try{          ajaxObject = new ActiveXObject("Microsoft.XMLHTTP");         }catch(e){           ajaxObject = false;         }      }    }    return ajaxObject;   }  function entryPoint(){    var ajaxObject = getAjaxObject();     if (ajaxObject ){    ajaxObject.onreadystatechange = function(){      takeAction(ajaxObject);     };    ajaxObject.open("POST","file.jsp", true);    ajaxObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded");    ajaxObject.send("id=500&name=keith&age=18"); } } function takeAction(ajaxObject){  if (ajaxObject.readyState == 4) {     if (ajaxObject.status == 200 || ajaxObject.status == 304){ //response was sent succesfully           //do something with the response          alert(ajaxObject.responseText);          var testDiv = document.getElementById("test");          testDiv.innerText = ajaxObject.responseText;      }  } }

• Processing Response Data
• The usual practice: response data can be in one of three formats: XML, JSON, HTML. And may be plain text.
• XML is the most common. example receive: var data = ajaxObject.responseXML; Here we can use the DOM functions to parse the XML data
• Example:

  var data = ajaxObject.responseXML;data.getElementsByTagName("name")data.getElementsByTagName("name")[0]data.getElementsByTagName("name")[0].firstChilddata.getElementsByTagName("name")[0].firstChild.nodeValueSimilarly, you can use other DOM functions

• To change the contents of the web-page dynamically, you can use the DOM methods like — create, set, innerText, innerHtml (use carefully) methods. Check the JavaScript DOM article [846] in this web-site. adding and removing childs/elements may be required in some situations – DOM also supports that
• You can also send data as JSON from the server side like: JSON format:
  {“person”:{ “name”:”Keith Tang”, “school”:”uofm” }}
• Receiving and extracting information from JSON: [content type will be text]

   var data = eval('('+ ajaxObject.responseText +')'); var name = data.person.name; var school = data.person.school; 

• Response data as HTML
• The response can come as HTML. This may be useful, if only one area of the web-page is affected and we want to put the HTML response in that area. Otherwise it may not be great. Also, we need to use innerHTML method that was introduced by IE and later adopted by others. Still, it’s not a standard (W3C)
• Example: The content type of response data should be text/html

         if (ajaxObject.status == 200 || ajaxObject.status == 304){ //response was sent succesfully           //do something with the response          alert(ajaxObject.responseText);          var testDiv = document.getElementById("test");          testDiv.innerHTML = ajaxObject.responseText;      }

From: http://sitestree.com/?p=4969
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Post Data:2009-03-30 16:04:56

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• Understanding Javascript DOM is the first step to understand Ajax.
• DOM provides many methods to access and edit individual components of a web-page/document. The methods are called getters.

•  
   Hello 

  getElementById method can reference to this div element. var testDiv = document.getElementById(“test”); CSS #test{} refers to the same area of the document

• getElementsByTagName: all the elements with the partcular tag name. Returns an array. var testTag = document.getElementsByTagName(“p”); just like p{} in CSS applies to all tags.
• testTag.length can be useful.
• You can also cycle through the elements and take some actions

        for(var i = 0; i < testTag.length ; i++){         //do something      }   

• Another example: document.getElementById(“test”).getElementsByTagName(“p”); [CSS #test p{} – will affect the same area in CSS]
• DOM provides getAttribute () : can access the value of an attribute.

  Hello

  : var title= document.getElementById(“test”).getAttribute(“title”);

• Web-page can be thought of a set of interconected nodes. getElementById, getElementsByTagName, getAttribute – all help in accessing the nodes.
• Three basic types of nodes in web-pages: element, text, attribute. element – building block, text = attribute = content
• Every node is contained under another node. So there will be parent and child relationships. parentNode, childNode – are corresponding methods for accessing parents and childs.
• Example: var test = document.getElementById(“test”); var testParent= test.parentNode; var testChild = test.childNodes;
• childNodes – returns an array
• var allEle = document.getElementsByTagName(“*”); – a collection of all the elements of the web-page.
• firstChild – first Child of an element, lastChild – lastChild of an element, previousSibling, nextSibling – having same parent of the current node (next element), nodeValue, nodeValue – content of a node,
• DOM Setters
• Using DOM, you can create elements dynamically and put it in the document. createElement() – method serves the purpose

• var paragraph = document.createElement("p"); - element created - element node - but not inserted in the document yetvar textNode = document.createTextNode("A new text node from DOM!"); - creates a text node

• setAttribute() – method can be used to set the attributes of a node. example: paragraph.setAttribute(“title”, “introduction”);
• appendChild() – append one node under another node;

•     var pNode = document.createElement("p");    var textNode = document.createTextElement("How is it going?");     pNode.setAttribute("title","Test Title");     pNode.appendChild(textNode);          var testDiv = document.getElementById("testDiv");     testDiv.appendChild(pNode);

• removeChild() – helps to remove a child node from a parent node

From: http://sitestree.com/?p=4968
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Post Data:2008-02-06 07:27:43

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    8112223 Canada Inc./JustEtc: <a href='http://JustEtc.net' target='new' rel="noopener">http://JustEtc.net (Software/Web/Mobile/Big-Data/Machine Learning) </a>
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