Passing parameter between portlets

I have a page with 2 rows and the first row contains a portlet (form) which has just one field (dept_id) with lov attached to it. When a dept id is selected from the lov I need to retrieve the corresponding employee details in the portlet which is a form placed in the second row of the page.
Following is the procedure I'm using it to set the selected dept id in the session object and this is being called from the onchange event of the dept_id field of first form.
PROCEDURE p_select_new_dept (p_session in out portal30.wwa_api_module_session)
IS
v_dept_id DEPT.DEPT_ID%TYPE;
v_Session portal30.wwsto_api_session;
BEGIN
v_dept_id := p_session.get_value_as_number(p_block_name=>'DEFAULT',
                         p_attribute_name=>'A_DEPT_ID');
v_Session := portal30.wwsto_api_session.load_session('CONTEXT', 'SESS_DEPT');
v_Session.set_attribute('DEPTID', v_dept_id);
v_Session.save_session;
END;
and following is the code I have it in the ..before displaying page...section of the additional pl/sql tab
of the Employee Details form (which is placed in the second row of the page as portlet)
Declare
v_RowID VARCHAR2(100);
v_Session portal30.wwsto_api_session;
v_dept_id DEPT.DEPT_ID%TYPE;
BEGIN
v_Session := portal30.wwsto_api_session.load_session('CONTEXT', 'SESS_DEPT');
v_dept_id := v_Session.get_attribute_as_number('DEPTID');
BEGIN
     SELECT rowidtochar(rowid)
     INTO v_rowid
     FROM DEPT
     WHERE DEPT_ID = v_dept_id;
END;
p_session.set_value (p_block_name=> 'DEFAULT', p_attribute_name=> '_ROWID'
               ,p_value=> v_rowid);
p_session.set_value (p_block_name=>'DEFAULT', p_attribute_name=>'_CALLED_FROM_LINK'
               ,p_value=>'ROWID');
PORTAL30.wwa_api_module_event.do_event('DEFAULT', 'QUERY_TOP', 1, 'ON_CLICK', True, '', p_session);
p_session.save_session;
END;
When I run the page and selected the dept_id from the first portlet the employee details are retrieved for the previously selected dept_id and not for the currently selected dept_id.
For eg., if I select 10 it is not retrieving any details for this dept_id and if select 20 then it retrieves the employee details for 10(previusly selected dept_id)..and so on..
Can you tell me what I'm doing wrong?.
Thanks
-Krishnamurthy

We need to use portlet events for sending parameters across different pages.
Following documents can give you insight on this :
1. http://portalstudio.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/ARTICLES/PRIMER.PORTLET.PARAMETERS.EVENTS.HTML
2. http://portalstudio.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/ARTICLES/DESIGNING.PAGES.USING.PDKJAVA.SAMPLE.EVENT.WEB.PROVIDER.HTML
-AMJAD.

Similar Messages

Portlet event link to pass parameter between portlets

Ok list, I followed the documentation Adding Parameters and Events to Portlets
PDK Release 2 (9.0.2 and later) and tried to make a portlet that pass parameter to another portlet using event link. I created the supposed parameter in the page and made the correct association to the receiving parameter portlet. The case is: The parameter is not caught in the receiving parameter page.
This is my event link jsp code:
<%
String sImgPath = PropertiesReader.getProperty(PropertiesReader.KEY_IMAGES_PATH);
PortletRenderRequest portletRequest = (PortletRenderRequest)request.getAttribute(HttpCommonConstants.PORTLET_RENDER_REQUEST);
// The portlet definition in provider.xml includes the following:
// - Event "submit" with event parameters "funcionalidade"
String eventSubmit = EventUtils.eventName("submit");
String eventParamFuncionalidade = EventUtils.eventParameter("funcionalidade");
// Build up the list of parameters for the "submit" event
NameValuePair[] eventSubmitParams = new NameValuePair[2];
// Give the 'funcionalidade' event parameter the constant value 'chat'
eventSubmitParams[0] = new NameValuePair(eventParamFuncionalidade, "chat");
// The event name must be passed as a parameter on the URL
eventSubmitParams[1] = new NameValuePair(eventSubmit, "");
%>
<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0">
<TR><TD><a href="<%=PortletRendererUtil.constructLink(portletRequest,   portletRequest.getRenderContext().getEventURL(), eventSubmitParams, true, true)%>"><IMG SRC="<%= sImgPath + "menuButChat.gif" %>" BORDER="0"></a></TD><TR>
</TRABLE>
And this is my receiving parameter jsp code:
<%
String sFuncionalidade = "";
PortletRenderRequest portletRequest = (PortletRenderRequest)request.getAttribute(HttpCommonConstants.PORTLET_RENDER_REQUEST);
// Get the portlet definition - needed to get the public portlet parameters
PortletDefinition portlet = portletRequest.getPortletDefinition();
// Get the public portlet parameters
ParameterDefinition[] parameters = portlet.getInputParameters();
// Display all values for each of the public portlet parameters
for (int currParameter = 0; currParameter < parameters.length; currParameter++)
String name = parameters[currParameter].getName();
out.println(" <p>name = " + name + "</p> ");
// Get the parameter values
String[] values = portletRequest.getParameterValues(name);
// Display the parameter's values.
if ( values == null )
// Null array indicates no values for this parameter.
out.println(" <p>values i null</p> ");
else
out.println(" values nco i null ");
// Loop through each of the values and display non-null values on a separate line.
for ( int j = 0; (values != null) && (j < values.length); j++ )
sFuncionalidade = values[j];
out.println(" <p>" + sFuncionalidade + "</p> ");
%>
And this is my portlet definition in provider.xml:
<portlet class="oracle.portal.provider.v2.DefaultPortletDefinition">
<id>3</id>
<name>MenuColaboracao</name>
<title>Menu de Colaboragco</title>
<shortTitle>Menu de Colaboragco</shortTitle>
<description>Portlet de menu para funcionalidade de Comuicagco e Colaboragco.</description>
<timeout>10000</timeout>
<timeoutMessage>Portlet timed out</timeoutMessage>
<showEdit>false</showEdit>
<showEditDefault>false</showEditDefault>
<showPreview>false</showPreview>
<showDetails>false</showDetails>
<hasHelp>false</hasHelp>
<hasAbout>false</hasAbout>
<acceptContentType>text/html</acceptContentType>
<renderer class="oracle.portal.provider.v2.render.RenderManager">
<renderContainer>false</renderContainer>
<contentType>text/html</contentType>
<showPage>/menuColaboracao.jsp</showPage>
<pageParameterName>next_page</pageParameterName>
</renderer>
     <event class="oracle.portal.provider.v2.DefaultEventDefinition">
     <name>submit</name>
<description>Use this event to submit the form data to a page</description>
<parameter class="oracle.portal.provider.v2.DefaultParameterDefinition">
<name>funcionalidade</name>
<displayName>funcionalidade</displayName>
<description>Parbmetro que indica a funcionalidade a ser apresentada.</description>
</parameter>
</event>
</portlet>
<portlet class="oracle.portal.provider.v2.DefaultPortletDefinition">
<id>4</id>
<name>HomeController</name>
<title>Home Controller</title>
<shortTitle>Home Controller</shortTitle>
<description>Portlet que controla a exibigco do jsp correspondente a opgco de menu selecionada.</description>
<timeout>10000</timeout>
<timeoutMessage>Portlet timed out</timeoutMessage>
<showEdit>false</showEdit>
<showEditDefault>false</showEditDefault>
<showPreview>false</showPreview>
<showDetails>false</showDetails>
<hasHelp>false</hasHelp>
<hasAbout>false</hasAbout>
<acceptContentType>text/html</acceptContentType>
<renderer class="oracle.portal.provider.v2.render.RenderManager">
<renderContainer>false</renderContainer>
<contentType>text/html</contentType>
<showPage>/homeController.jsp</showPage>
<pageParameterName>next_page</pageParameterName>
</renderer>
     <inputParameter class="oracle.portal.provider.v2.DefaultParameterDefinition">
     <name>funcionalidade</name>
<displayName>funcionalidade</displayName>
<description>Parbmetro que indica a funcionalidade a ser apresentada.</description>
</inputParameter>
</portlet>
Where do I miss ???
Any help will be appreciated.
Regards,
Leandro.

Leandro,
Few things which you might want to cross check to see if we are
on the right track :
1. Page containing Parameter receiving portlet contains a
paga parameter mapped on to its public parameter.
As per your example, parameter receiving page should have a page
parameter with name - "funcionalidade" - and portlet's corresponding
parmeter should be mapped to this page parameter. This can be
done through "Parameters" tab in the Page Properties screen.
2. Page containing Parameter passing portlet contains proper event
mapping.
As per your example, we have an event called "submit". We should
be able to see "submit" event under "MenuColaboracao" portlet.
When this event is raised, select which page should receive the event
data. As soon as a page is selected, this page's public parameters
are displayed below. Beside that we must be able to see a choice box
which displays four choices one of which would be "Event Output".
Map this output to the event parameter.
Hope it helps.
-AMJAD.

Pass Parameter between Portlets

I have two reports, one each in their own portlet. Portlet(A) is a summary, Portlet B is the container for the report detail.
I need to know how to create a link and pass a variable from portlet A to portlet B.
1. Can this be done?
2. How?
3. Is a wizard available to configure this?
Thank You.

Thanks Jerry
I've tried out your code and it works, though amongst other things I had to change the pageid of 117 to my specific pageid. This means the report processing is specific to the page I create it for.
I'm glad to see you've now included the idea of accessing l_arg_names and l_arg_values via pl/sql code maintained in the wizard. This is much better than modifying generated code.
The piece of code to generate the full argument name
p_reference_path| |'.dept', wwv_30898.wwv_standard_util.string_to_table2(nvl(get_value('dept'), 10))will be useful though I've had no problems yet with my technique of just ignoring the reference path components of the argument name.
My current technique is to create a form on a dummy procedure and process some pl/sql on the submit button:
args.store_arg_in_session('session_ppn',
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p_block_name => p_block_name,
p_attribute_name => 'A_P_DUMMY'
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args.set_arg_if_null
(l_arg_names,l_arg_values,'ppn',
nvl(args.get_arg_in_session
('session_ppn'),'unknown'));In this case ppn is a bind variable in the sql statment.
Then, the report will access the session variable wherever you run it, regardless of what page you put it on etc.
I've tried similar techniques with forms but I can't get the form to re-access the session variable when the latter changes its value.
However the ability to set and get session variables and access them in reports is very good. It greatly reduces the amount of keying required by users. Portal would be much less useful to me without it.
I must admit I'm very impressed with Portal and with the support for it via this discussion.
null

Passing Parameter between Methods

I have some problems because i don't really know how to pass parameter between methods in a java class.
How can i do that? below is the code that i did.
I want to pass in the parameter from a method called dbTest where this method will run StringTokenizer to capture the input from a text file then it will run storeData method whereby later it will then store into the database.
How can i pass data between this two methods whereby i want to read from text file then take the value to be passed into the database to be stored?
Thanks alot
package com;
import java.io.*;
import java.util.*;
import com.db4o.ObjectContainer;
import com.db4o.Db4o;
import com.db4o.ObjectSet;
class TokenTest {
       private final static String filename = "C:\\TokenTest.yap";
       public String fname;
     public static void main (String[] args) {
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          ObjectContainer db=Db4o.openFile(filename);
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        String lname;
        String city;
        String state;
         dbStore();
        storeData();
     finally {
          db.close();
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        DataInputStream dis = null;
        String dbRecord = null;
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           FileReader fis = new FileReader(f);
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              String lname = st.nextToken();
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              String state = st.nextToken();
              System.out.println("First Name: " + fname);
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              System.out.println("City:        " + city);
              System.out.println("State:       " + state + "\n");
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        } finally {
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              try {
                 dis.close();
              } catch (IOException ioe) {
                 System.out.println("IOException error trying to close the file: " +
                                    ioe.getMessage());
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     } // end dbTest
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          new File(filename).delete();
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          //Add data to the database
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          db.set(tk);
    //     try {
              //open database file - database represented by ObjectContainer
    //          File filename = new File("c:\\abc.yap");
    //          ObjectContainer object = new ObjectContainer();
    //          while ((dbRecord = bis.readLine() !=null))
    //          db.set(fname);
    //          db.set(lname);
    //          db.set(city);
        //          db.set(state);
} // end class
     Message was edited by:
erickh

In a nutshell, you don't "pass" parameters. You simply call methods with whatever parameters they take. So, methods can call methods, which can call other methods, using the parameters in question. Hope that makes sense.

Passing parameter between two applets

hi all,
i want to pass parameter between two applets. in other words, when user clicks the button; close the running applet, pass parameter to another applet and run another applet.
now i think that could be, ( creating a parameter table in database, when user click on button write parameters to table and stop active applet and run other applet. when other applet runs in init methot it takes parameter from table). but it will be very indirect way.
if you have an idea or information, plesae tell me.
thanks for your interest

Hi ,
Plz pay a visit to this wonderful website,
http://www.rgagnon.com/javadetails/java-0022.html / http://www.rgagnon.com/howto.html
Best Wishes,
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PS : Thanks to Real Gagnon. This is all I can do at this stage, but wanted to say you are doing a wonderful job.

Passing parameter between two portlets which are in two diffrent pages

hi,
This is query regaring passing the parameters from one java portlets to another. Or Receiving parameter from Portlets.
The Secanrio is like :
I have two portlets shown in the two different pages. Now while running the application i want to send the all the data is entered by user in the next page.
1. How to pass the value of all the parameter in the second portlet ?
2. how to name the url of the second page in action of first page

We need to use portlet events for sending parameters across different pages.
Following documents can give you insight on this :
1. http://portalstudio.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/ARTICLES/PRIMER.PORTLET.PARAMETERS.EVENTS.HTML
2. http://portalstudio.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/ARTICLES/DESIGNING.PAGES.USING.PDKJAVA.SAMPLE.EVENT.WEB.PROVIDER.HTML
-AMJAD.

Passing parameters between portlets with in the same page

Hello,
I have created a Form and a report. The form allows a user to make some selection values, and then upon submit it passes the selected values to the report to query the database. The results from the query are displayed in a new - seperate - window from the form. Is there anyway to disaply the report results on the same page as the form that called the report? I guess I am trying to have a page with 2 portlets (a form, and a report). I want the user to be able to make a selection from the form portlet and pass that selection to the report portlet within the same page.
Thanks,
McKell

Hi I received this info from an OSS named Mahantesh. I thought it was very helpful information for passing portlet parameters between a form and a report within the same page.
Please check these steps to pass parameter from form to report:
This article is based on demo tables EMP and DEPT.
1. Create a report RPT_DEPT using the query 'Select * from dept where deptno= :deptno'
2. Create a form FRM_EMP based on EMP table.
3. Edit the form FRM_EMP => 'Formatting and Validation Options' section => click on DEPTNO field
=> Give the value for the 'Link' (under 'Display options') as 'javascript:runrep()' where runrep is the name<br>
of javascript function that we are going to create later.
4. In 'Form text' section, in the 'Footer Text' add the code for the runrep function as follows.
<script>
function runrep()
var formObj = document.forms[0];
var deptno;
for (var i=0; i < formObj.length ; i++){
if (formObj.elements.name == 'FORM_EMP.DEFAULT.DEPTNO.01'){
//FORM_EMP is the form name
deptno = formObj.elements[i].value;
break;
var url="/portal/page?_pageid=38,1,38_31678:38_31787&_dad=portal&_schema=<br>
PORTAL&deptno=" + deptno;
//modify the url according to your environment.<br>
window.location=url;
}<br>
</script>
5. Modify the URL in the above code with your page url on which form and report portlets have been placed.
6. Goto Page properties => Parameters tab (Parameters and Events option should have been enabled at Pagegroup level).
7. Create a page parameter and map it with report portlet parameter.
8. Now run the page, enter deptno or query the form to get the deptno and click on the link next to deptno field. You should get report with corresponding deptno on the page.

Pass parameter between programs

Hi,
I need to pass one parameter between 3 programs :
That is the actual flow of my parameter.
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Hello,
The value which you want to pass between the programs can be stored in the SAP memory space by using the IMPORT and EXPORT to MEMORY ID statement.
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Hope it helps.
Thanks,
Jayant.
<<text removed - don't ask for points>>
Edited by: Matt on Nov 19, 2008 7:48 PM

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You can get the sample code for your answer here:
http://otn.oracle.com/sample_code/products/jdev/index.html
Download sample code with title:
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Looks like you've got it almost right - just an extra unneeded "
<a href="two.jsp"?ant=<%= ant %>"><%=antName%></a>
which should render on the page as something like
My Ant Task
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null

Neil,
You can definitely pass parameters from one portlet to another in PL/SQL and we actually have a sample that you can take a look at. In the PDK, download the Parameter passing and CSS Example Provider sample. http://technet.oracle.com/products/iportal/files/pdkjan/index.html
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--Shiv

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A co-worker of mine helped me fix my code to make it work!
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Passing Data between portlets

Hi,
How can we pass the data from a Portlet in one page to another Portlet in a different Page??
Requirement: I want a portlet which should take some parameters(basically a form),On submit should process the parameters and should forward the result to a Portlet in another page.
Regards
Yash

Thanks Abhinav,
I went through the eventform.jsp present in the JPDK.ear.I was able to run the same,But I still have some problems accesing the values that were passed.
1. How to get the information in the second portlet when the form is submitted to other page.
I checked whether data is being passed from one page to another by setting method="Get".The data is getting passed to the other Page.But I am not able to use the values in the Portlet. I tried using request.getParameter("parameter") in Portlet2,but it is not working.
2. In the page properties of page 1, I set the SUBMIT event to get the same page back,this too is not working,it is directly taking me to Page2 when I click the SUBMIT button.How to specify it other than using page properties ->events
3.I want to know where the information regarding the Pages are stored.
Regards
Yash

Passing parameter between portlets

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