Store value from request message to be processed in response mapping

Hi,
I have the following synchronous scenario:
R/3 (ABAP Proxy) <> XI/PI <> 3rd party Web Service
I need to reference a value in the sender (request) message in the response mapping.
For example:
A request with a user ID is received from R/3 to XI/PI. I want to store the user ID in the request message. A response is received from the web service. I then want to use the user ID in the response mapping.
I believe XI/PI can meet this requirement with a BPM using container or possibly using a custom table to store Message GUID and the variable value in the request message mapping.
Are there any other methods that can be used to meet this scenario?
Thanks and regards,
Duke

Hi All,
This is the first time I've encountered such a requirement. Most of the time we create our own programs that call the sender proxy, so to interogate the results and call another proxy would be the ideal solution. But, in this case the standard LSO process controls the execution of the proxy. We may look into doing an enhancement to the standard code, but I was looking for a way we can do this in PI with minimal effort.
As Stefan stated, I also noticed that the DynamicConfiguration is emptied in the response.
We will explore the use of BPM, but from what I can see, utilizing a custom table with the runtime constant MESSAGE_ID may be the simplest solution in PI.
Thanks and regards,
Duke

Similar Messages

How to store the value of request message and use it in Response mapping

Hi All,
We have an requirement where we need to store the data coming in Request Mapping and use the stored value in Response Mapping. Can anybody help us in how to proceed?
Thanks
Sujata

Hi!
In Mapping you may use the RFC Lookup function to store values in database table during request mapping and to read values from database table during response mapping.
You can also use an ABAP or Java Mapping "in front of your" message mapping to store/read the values.
You can also use an Adapter Module (if applicable for the adapter type you use) and/or a UDF to store the data e.g. in Dynmaic Configuration Header of Request Message and to read these data from Dynamic Configuration Header of Response Message. But this works only for synchronous scenarios (and it means overhead in your message traffic).
Hope these thinkings help you o find the most suitable way for your concrete scenario!
Regards,
Volker
Note:
These techniques help you to avoid using BPM.
Edited by: Volker Kolberg on Aug 27, 2009 11:18 AM

Soapenv missing from request message

Hi,
XI send the following SOAP request :
<?xml.version="1.0".encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:q0="http://tlk.bs.com/opentlk/webservice/extract/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<q0:exportInput>
<q0:accountId>0000169149</q0:accountId>
<q0:extractionDate/>
</q0:exportInput>
</soapenv:Body>
</soapenv:Envelope>
The third party only receives the following :
<?xml.version='1.0'.encoding='utf-8'?>
<Envelope>
<Body>
<exportInput>
<accountId>0000169149</accountId>
<extractionDate>
</extractionDate>
</exportInput>
</Body>
</Envelope>
Any inputs will be great..Thanks

Hi,
Apologies for the long mail ...
The error occurs in the inbound message of response...
LOG from communication channel:
4/14/11 11:00:35 PM e066e29e-a3e6-6cf1-af66-001e0bc62218 Message processing failed. Cause: com.sap.aii.af.ra.ms.api.RecoverableException: SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 500 Internal Server Error
4/14/11 11:00:35 PM e066e29e-a3e6-6cf1-af66-001e0bc62218 error in response
4/14/11 11:00:35 PM e066e29e-a3e6-6cf1-af66-001e0bc62218 call completed
4/14/11 11:00:34 PM e066e29e-a3e6-6cf1-af66-001e0bc62218 request entering
4/14/11 11:00:34 PM e066e29e-a3e6-6cf1-af66-001e0bc62218 Message processing started
LOG from Adapter engine
14.04.2011 23:00:34 Success MP: Processing local module localejbs/sap.com/com.sap.aii.af.soapadapter/XISOAPAdapterBean
14.04.2011 23:00:34 Success SOAP: request message entering the adapter with user J2EE_GUEST
14.04.2011 23:00:34 Success SOAP: request message is sending to the url : https://tflws.xxxxxsolution.co.uk/esop/tfl-host/webservices/ExtractDataDoc
14.04.2011 23:00:35 Success SOAP: completed the processing
14.04.2011 23:00:35 Success SOAP: continuing to response message 9fdf0f38-66e2-11e0-84e8-00000021ddba
14.04.2011 23:00:35 Error SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 500 Internal Server Error
14.04.2011 23:00:35 Error MP: Exception caught with cause com.sap.aii.af.ra.ms.api.RecoverableException: SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 500 Internal Server Error
14.04.2011 23:00:35 Error Exception caught by adapter framework: SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 500 Internal Server Error
14.04.2011 23:00:35 Error Delivery of the message to the application using connection SOAP_http://sap.com/xi/XI/System failed, due to: com.sap.aii.af.ra.ms.api.RecoverableException: SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 500 Internal Server Error. Setting message to status failed.
14.04.2011 23:00:35 Error The message status set to FAIL.
14.04.2011 23:00:35 Error Returning synchronous error message to calling application: com.sap.aii.af.ra.ms.api.RecoverableException: SOAP: response message contains an error XIAdapter/HTTP/ADAPTER.HTTP_EXCEPTION - HTTP 500 Internal Server Error.
I have debugged the standrad out bound processing code. The only difference i see between regression and production is :
in the class CL_XMS_PROFILE_XMB there is a method IF_XMS_PROFILE~PARSE
Here there is a piece of code :
unpackaging based on the mime type (text, binary, multipart)*
l_prtk = extmessage->getKind( ).
In regression system the value l_prtk = 'M' and in production the value l_prtk = 'S'. We have been struggling to figure out why this differenece in l_prtk. here M is for multipart message and S is for simple message.
I believe when the variable l_prtk is u2018Su2019 in R3P , the proxy code removes the tags : Soapenv and namespaces from the SOAP request for which we get error. We have experienced intermittent errors in R3R and the error happens only when the variable l_prtk has value u2018Su2019.
Any any where the MIME type is maintained for SOAP message?
Regards
Niladri

Help with getting values from request. Very Strange!!

Hello,
My very strange problem is the following.
I have created three dynamic list boxes. When the user select
the first list box, the second becomes populated with stuff
from a database. The third becomes populated when the second
is selected. Now, I have used hidden values in order for
me to get the selected value from the first listbox. The
following code is my first listbox:
<SELECT NAME="resources" onChange="document.hiddenform.hiddenObject.value = this.option [this.selectedIndex].value; document.hiddenform.submit();">
<OPTION VALUE =""> Resource</OPTION>
<OPTION VALUE ="soil"> Soil </OPTION>
<OPTION VALUE ="water"> Water </OPTION>
<OPTION VALUE ="air"> Air </OPTION>
<OPTION VALUE ="plants"> Plants </OPTION>
<OPTION VALUE ="animals"> Animals </OPTION>
</SELECT>
I use the getRequest method to get the value of hiddenObject.
At this time I am able to get the value of hiddenObject to populate
the second list box.
But, when the user selects an item from the second list box
and the second form is also submitted,
I lose the value of hiddenObject. Why is this??
The code to populate my second listbox is the following:
<SELECT NAME ="res_categories" onChange="document.hiddenform2.hiddenObject2.value = this.options[this.selectedIndex].value; document.hiddenform2.submit(); ">
<OPTION VALUE ="" SELECTED> Category</OPTION>
Here I access a result set to populate the list box.
Please help!!

Form parameters are request-scoped, hence the request.getParameter("hiddenObject"); call after the submission of the second form returns a null value because the hiddenObject parameter does not exist within the second request.
A solution would be to add a hiddenObject field to your second form and alter the onChange event for res_categories to read
document.hiddenform2.hiddenObject.value=document.1stvisibleformname.resources.option[document.1stvisibleformname.resources.selectedIndex].value;
document.hiddenform2.hiddenObject2.value = this.options[this.selectedIndex].value;
document.hiddenform2.submit();You will then come across a similar problem with your third drop-down if indeed you need to resubmit the form...
A far better approach would be to create a session scoped bean, and a servlet to handle these requests. Then when the servlet is called, it would set the value of the bean property, thus making it available for this request, and all subsequent requests within the current session. This approach would eliminate the need for the clunky javascript, making your application far more stable.

How can i store values from my String into Array

Hi guys
i wants to store all the values from my string into an array,,,, after converting them into intergers,,,, how i can do this becs i have a peice of code which just give me a value of a character at time,,,,charat(2)...BUT i want to the values from String to store in an Array
here is my peice of code which i m using for 1 char at time
int[] ExampleArray2 = new int[24];
String tempci = "Battle of Midway";
for(int i=0;i>=tempci.length();i++)
int ascii = tempci.charAt(i); //Get ascii value for the first character.

public class d1
     public static final void main( String args[] )
          int[] ExampleArray2 = new int[24];
          String tempci = "Battle of Midway";
          for(int i=0;i<tempci.length();i++)
               int ascii = tempci.charAt(i);
               ExampleArray2=ascii;
          for(int i=0;i<ExampleArray2.length;i++)
               System.out.println(ExampleArray2[i]);

How to pass field value from popup window to oninput processing of other pg

Hi,
I want to pass a field value from the popup window to oninput processing of main page ( from where popup window is triggered). and need to close the popup window. How to do it ?
In the popup window's oninputprocessing, im doing some validation checks. If it passes all the validations, then only the control shd come to main page ..else it should stay in popup window only .
Regards,
Jothi.

Hi Jothi,
you can use java script to pass the value and close your popup window. use the following code.
in your popup window:
function passData(h1)
         window.opener.document.getElementById('var1').value = h1 ;
         window.close();
then call this function when you finish your validations.
in your main page layout create an input field with id as passed in the function above "var1".
In the value attribute give it your variable as follow:
<htmlb:inputField id      = "var1"
                          value   = "<%= var2 %>"
                          visible = "false" />
"var2" will be assigned the value from your popup window.
I hope this will help you..
Regards,
Husain

Get the mapping values from one message mapping into another message mappin

Hi All,
I created two graphical message mappings. In first message mapping i created one user defined function and set one global container parameter and I need to use this parameter in my second message mapping user defined function. But the global container parameters can be used in different user defined functions in same message mapping. So is there any way to use the values which are set in one message mapping into another message mapping. If yes, please help me how to get?

Hi Koteswara rao,
As you said global container parameters from first message mapping are not accessible from second message mapping program.
i haven't faced situation like this.but, if you have some unmapped field in target message in first message mapping,you can put global variables data in that unmapped field.
anyway the output of first message mapping would be input for 2nd messages mapping,so you can access global data(unmapped field filled with global data in 1st MM) from 2nd mapping program..
Cheers,
Jag

Get all values from request.getParameter

In ASP, I can do something like that...
For each item in Request.Form
Response.write "Name is:" & item & " value is:" & Request(item)
Next
How about in JSP? How do i get the names and values of the form using a loop?

You can use request.getParameterNames() which will return an enumeration, then you can iterate through the enumeration and use request.getParameterValue(String paramName) method to get the values.

Unable to retrieve values from request.getAttribute()

I had a JSP file called targetJspPage.jsp that contains the following statement within a set of <form> tags:
<% request.setAttribute "url","/myProj/targetJspPage.jsp");%>This information is then submitted to a servlet using POST method which will use a RequestDispatcher to retrieve the the url from the request attribute that I had set just now. The statement is as follows:
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher((String)request.getAttribute("url"));
if (dispatcher != null)
dispatcher.forward(request, response);The purpose of this procedure is to let the servlet know which JSP file it is suppose to forward the processed results. The url is always the url of the page that is calling the servlet. Eg. In this case, my JSP file is targetJspPage.jsp which resides in myProj folder. So, in this JSP file, the url set for the servlet will be /myProj/targetJspPage.jsp. But my problem now is that the (String)request.getAttribute("url") statement in the servlet always returns null. Why is that so?
This type of question was asked numerous times in the forums but the solutions aren't working. I do not want to use a session to store the value. However, I also tried using session before and the result is the same.

Hi Sad,
1.
Is it possible that you post the codes that we can see clearly what is going on? (If possible only).
(Unless I'm wrong, it may be that the request.setAttribute is used to pass object on the server side only, ie you can't use the request.setAttribute to keep data like the session object during the client-server trips of request/response.
The fact that you get null for (String)request.getAttribute("url") is because the Browser send a new request object which is different from the old one (request.setAttribute which is gone once we down the client)
(2. I want to learn too, and hope some one will find a solution for you)
-- Paul.

Problem getting arraylist values from request

Hi All,
I am trying to display the results of a search request.
In the jsp page when I add a scriplet and display the code I get the values else it returns empty as true.Any help is appreciated.
<%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
     <%@ include file="/includes/header.jsp"%>
     <title>Research Results</title>
</head>
<body>
<div class="ui-widget ui-widget-content">
    <%
    ArrayList<Research> research = (ArrayList<Research>) request.getAttribute("ResearchResults");
     Iterator iterator = research.iterator();
          while(iterator.hasNext()){
          Research r = (Research) iterator.next();
          out.println("Result Here"+r.getRequesterID());
          out.println("Result Here"+r.getStatus());
    %>
     <form>
     <c:choose>
     <c:when test='${not empty param.ResearchResults}'>
     <table cellspacing="0" cellpadding="0" id="research" class="sortable">
     <h2>RESEARCH REQUESTS</h2>
               <tr>
               <th><a href="#">RESEARCH ID</a></th>
               <th><a href="#">REQUESTOR NAME</a></th>
               <th><a href="#">DUE DATE</a></th>
               <th><a href="#">REQUEST DATE</a></th>
               <th><a href="#">CLIENT</a></th>
               <th><a href="#">STATUS</a></th>
               <th><a href="#">PRIORITY</a></th>
               </tr>
          <c:forEach var="row" items="${param.ResearchResults}">
                    <tr title="">
                         <td id="researchID">${row.RESEARCH_ID}</td>
                         <td>${row.REQUESTER_FNAME} ${row.REQUESTER_LNAME}</td>
                         <td><fmt:formatDate pattern="MM/dd/yyyy" value="${row.DUE_DATE}"/></td>
                         <td><fmt:formatDate pattern="MM/dd/yyyy" value="${row.CREATED_DATE}"/></td>
                         <td>${row.CLIENT}</td>
                         <td>
                         <c:choose>
                           <c:when test="${row.STATUS=='10'}">New Request</c:when>
                           <c:when test="${row.STATUS=='20'}">In Progress</c:when>
                           <c:when test="${row.STATUS=='30'}">Completed</c:when>
                          </c:choose>
                         </td>
                         <td>
                         <c:choose>
                           <c:when test="${row.PRIORITY=='3'}">Medium</c:when>
                           <c:when test="${row.PRIORITY=='2'}">High</c:when>
                           <c:when test="${row.PRIORITY=='1'}">Urgent</c:when>
                          </c:choose>
                         </td>
                         </tr>
          </c:forEach>
     </table>
     </c:when>
     <c:otherwise>
     <div class="ui-state-highlight ui-corner-all">
               <p><b>No results Found. Please try again with a different search criteria!</b> </p>
          </div>
     </c:otherwise>
     </c:choose>
     </form>
          <%@ include file="/includes/footer.jsp"%>
     </div>
     </body>
</html>

What is ResearchResults?
Is it a request parameter or is it a request attribute?
Parameters and attributes are two different things.
Request parameters: the values submitted from the form. Always String.
Request attributes: objects stored into scope by your code.
They are also accessed slightly differently in EL
java syntax == EL syntax
request.getParameter("myparameter") == ${param.myparameter}
request.getAttribute("myAttribute") == ${requestScope.myAttribute}
You are referencing the attribute in your scriptlet code, but the parameter in your JSTL/EL code.
Which should it be?
cheers,
evnafets

Reading Null Values From Request Object

For a proof-of-concept, I wrote a mini program that has 2 files. File #1 is main.html. There's a javascript function called addNewRowToThisTable that isn't displayed but it basically allows the user to create as many rows in the table as user desires. When the "Submit" button is clicked the file ReadIt.jsp is called and it's supposed to display on the first and last names of the people who had the checkbox for that row checked. The best way to illustrate the problem I'm having is through an example. Let's say there are 3 rows:
[x] Alan Anderson [Add New Row]
[ ] Bob Brady [Add New Row]
[x] Carl Chadwick [Add New Row]
[Submit]
Let's assume that only rows 1 and 3 are clicked. After the form is submitted the JSP will print...
firstNameArr .length = 3
lastNameArr .length = 3
isSelectedArr.length = 2
firstNameArr[0] = Alan
lastNameArr[0] = Anderson
firstNameArr[1] = Bob
lastNameArr[1] = Brady
Unfortunately firstNameArr[1] and lastNameArr[1] should be "Carl", and "Chadwick" respectively. I know the reason why it's failing is because my program relies on the array index of the "isSelected" field to perfectly match up with the "firstName" and "lastName" fields. It's unreliable because if the checkbox for a row is not checked then it won't show up in the JSP String array isSelectedArr. I'm not really sure how to get around this problem. I have 2 ideas at the beginning of solutions but I'm not sure how to follow through on either and I'm also not sure if either is the proper approach to take. My guesses are...
1) There's some way in JSP to use "getParameterValues('isSelected')" to retrieve the full array of "isSelected" items regardless of whether or not they're checked. That would guarantee that my arrays would match up correctly. Unfortunately, I haven't been able to find this.
2) Maybe I can put in some sort of ID in the "isSelected" field that would relate the checkbox to the rest of the data in the row. The problem with this is that I've got a dynamic # of rows due to my addNewRowToThisTable method.
So the bottom line is that I'm thoroughly stumped. If anyone can offer advice I'd be very grateful.
main.html
<html><head><title></title></head><body>
<form method="get" action="ReadIt.jsp">
<table>
<tr>
     <td><input type="checkbox" name="isSelected" /></td>
     <td><input type="text" name="firstName" /> </td>
     <td><input type="text" name="lastName" /></td>
     <td><input type="button" value="Add New Row" onClick="addNewRowToThisTable(this)" />
</tr>
<tr>
     <td colspan=4><input type="submit" value="submit"></input></td>
</tr>
</table>
</form>
</body></html>
ReadIt.jsp
<%
String[] isSelectedArr = request.getParameterValues("isSelected");
String[] firstNameArr = request.getParameterValues("firstName");
String[] lastNameArr = request.getParameterValues("lastName");
if (firstNameArr != null) System.out.println("firstNameArr .length = " + firstNameArr .length);
if (lastNameArr != null) System.out.println("lastNameArr .length = " + lastNameArr .length);
if (isSelectedArr != null) {
     System.out.println("isSelectedArr.length = " + isSelectedArr.length);
     for (int i=0; i < isSelectedArr.length; i++) {
          System.out.println("firstNameArr["+i+"] = " + firstNameArr);
          System.out.println("lastNameArr["+i+"] = " + firstNameArr[i]);
%>

it's sort of a kludge, but try this:
your javascript function adds new for fields that get submitted to the servlet. name the checkboxes uniquely with a patterm with said function, say isSelected-1, isSelected-2, isSelected-3... now also name the first and last name fields the same way. fname-1, fname-2, fname-3... lname-1,lname-2,lname-3.
when you get to the page that is supposed to match them up, go through all the request parameters looking for those that start with "isSelected-" take the last char (the index), convert it to an int, and then from your request do:
String first = request.getParameter("fname-" + indexThatWasFound);
          String last = request.getParameter("lname-" + indexThatWasFound);in looping over the request for each index recovered from the searching of the request for the isSelected-n values, you will get the matching first and last name.
I TOLD you it was a kludge.

Geting null values from request

hi!
i m producing this code through out.println() method in my page and then using java script
i am submiting this page to another page
<td width="56%"><textarea name="question_no_1"></textarea></td>
<input name="question_no_1_radio1" type="radio" value="radio"></td>
<td width="59%"> <textarea name="question_no_1_ans1"></textarea></td>
<input type="radio" name="question_no_1_radio2" value="radio"></td>
<td><textarea name="question_no_1_ans2"></textarea></td>
<input type="radio" name="question_no_1_radio3" value="radio"></td>
<td><textarea name="question_no_1_ans3"></textarea></td>
<input name="question_no_1_radio4" type="radio" value="radio"></td>
<td><textarea name="question_no_1_ans4"></textarea></td>
but when i submit it to the other page and try to retrieve value of parameter "question_no_1"
through the bellow statement it shows a null value but i have given a value previously by
typing a question in it
System.out.println("the Body Of The First Question Is "+request.getParameter("question_no_1"));
can anybody help me what is going on here.
also if i try to normaly submit first page (ie <form="form1" method="post" action="other_jsp_page.jsp"> ) then the statement in the next page gives me the correct value but
i have to submit the first paper through java script.
if u want to see full detail of my code then go to the following link
http://forum.java.sun.com/thread.jsp?thread=309254&forum=45&message=1237097
thanx in advance

OK, your problem is that you are not submmiting the values to the other page. When you do the
--> document.forms[0].submit();
in JavaScript, the form has to action defined
--> <form name="form1" method="" action="">
So, the page does nothing. The line following the submit just changes the location of the page, IT DOES NOT POST the values.
One solutions is the following:
1.- define an action for your form:
<form name="form1" method="POST" action="'save_paper.jsp">
2.- Then create a JavaScript function that validates the fields and simply return "true" if the form is correct, and false if there is a problem (just a little modification of the one you have).
3.- Then modify your submit button:
Instead of:
<input type="button" name="Save" value="Save" onClick="validateField()">
Try:
<input type="SUBMIT" value="Save" onclick="validateField();">

How to get Int value from request.getParameter()?

Hi all,
I have a integer value which is passed from one page to another page.
i am geting this value in the next page using
request.getParameter().
Eg.
Suppose value of "i" in page1 is 32, i pass this as hidden variable to next page.
<input type="hidden" Value="<%=i%>" NAME="limit">
in page2, i fethch this value to a variable by name "limit"
String limit=request.getParameter("limit");
but, since value stored in limit is int, i can't assign it to string.
i can't use request.getParameter for int values.
How to solve my problem.
I know it is simple,
Pls. help me
Regards
ASh
String limit=request.getParameter("limit");

String limitSTR = request.getParameter("limit");
int limit = -1;
if (limitSTR != null) limit = Integer.parseInt(limitSTR);

How to read the Key value from the Message using the text value.. Urgent

I need to read the Key valuefrom the message pool using the text value for the Key.. Is it possible.. Please help me with sample code..
Thanks and Regards
Avijit

Avijit,
I got your requirement. I really dont know the scenario your working on but its possible to do it. There is no direct way to do so, but complexity is in getting to know the Keys dynamically from interface.
Here you go..
     try
          Class msgClass      = IMessageTestWDApps.class;
//Replace IMessageTestWDApps with IMessage<Your WD Component name>
          Field keys[]      = msgClass.getFields();
          IWDTextAccessor textAccessor = wdComponentAPI.getTextAccessor();
          if(keys != null)
               String key = "";
               for(int index=0;index<keys.length;index++)
                    key = keys[index].getName();
                    wdComponentAPI.getMessageManager().reportSuccess("Key= "+key);
                    if(textAccessor.getText(key).equals("My message text"))
                         //your logic.
     catch(Exception cnfe)
          wdComponentAPI.getMessageManager().reportException("Exe "+cnfe.getMessage(),false);
Regards
Abhilash
Message was edited by:
        Abhilash Gampa

Clearing values from request in decode method

I am using a custom table paginator. In its decode method I have the next code to control whether next link is clicked:
String pLink = (String)requestMap.get("pLink" + clientId);
if ((pLink != null) && (!pLink.equals(""))) {
     if (pLink.equals("next")) {
     } else if (pLink.equals("previous")) {
}But the next sequence produces some problems:
1.     Initial page load.
2.     Click on next link.
3.     Table navigates ok to next page.
4.     Reload page (push F5).
5.     The previous click still remains in the request, so decode method think next link is pressed again.
6.     Application abnormal behaviour arises.
So, I am trying to clear the next_link key from the request, but next code throws an UnsupportedOperationException:
String pLink = (String)requestMap.get("pLink" + clientId);
if ((pLink != null) && (!pLink.equals(""))) {
     if (pLink.equals("next")) {
     } else if (pLink.equals("previous")) {
     requestMap.put("pLink" + clientId, "");
}Do any of you have some ideas?

Hey, where are you RaymondDeCampo, rLubke, BalusC ... the masters of JSF Universe?
;-)

Store value from request message to be processed in response mapping

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