Help with passing parameters from a servlet to an applet

dear all
i m working on a application which will check weather a file is present in a server (webserver) if it is present then it will take the file name and put it into a drop down list and there is a button on click of which i m taking the call to an applet and then on that i need the file name if it is there then i use it to draw a graph
i m struck on how to take parameter from Servlet -> Applet
thanks
Nakul

hi,
I understood your question,The context "servlet" cannot communicate to
an applet becoz applet runs at clients browswer, rather you can communicate from an applet to servlet(HTTPURLCONNECTION class).
Well coming to the problem, this is how i have understood your problem,
basically uou get the list of files from the server using normal servelt programing and you will display in an html LIst box and then click the button to view the graph or chart ,
then you just want to pass the filename which is there in the listbox to an applet and applet will display some image.
As we know all that using <PARAM NAME=XX VALUE=YY> WE CAN GET THE VALUE IN APPLET BY USING GETPARAMTER() METHOD. and Im very sure that you are not asking that question. your question is like " both the applets and
the listboxes will be loaded at once and when he selects one of the file from the list box then without refreshing the page , how to display the graph.
Im i right?
If so i guess you have to use javascript to do that stuff, and i think its like gave an id for the tag shown <applet id="yes">
then in the javascript , you can call the Java applet methods (I have never tried before but seen some demos(i dont have that links- google it for inf))
but i can give clue like.. trying the <PARAM VALUE=""> IF POSSIBLE
CHAING THE HTML CONTENT IS POSSIBLE IN IE which is again through javascript by calling yes.innerHTML="<PARAM><PARAM><PARAM><PARAM>..."
Im sure that you can call Java methods from javascript but i never tried and even you can pass an arguments to it.. Let me check out like
becoz even im interested to know abt it
bye
with Regars
Lokesh T.C

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<HTML>
<FORM>
<BODY>
<%@ page import="java.util.*" %>
<%@ page import="java.text.*" %>
<%@ page import="java.sql.*" %>
<%@ page import="javax.sql.*" %>
<%@ page import="javax.naming.*" %>
<HTML>
<HEAD>
<TITLE>Resource Level Report</TITLE>
<table width="200" border="1" align="center">
<tr>
<th scope="row"><img src="color_teradata_logo.gif"> </th>
<td></td>
<td><img src="lloydslogo.gif"></td>
</tr>
</table>
<br>
</HEAD>
<BODY leftmargin=0 topmargin=0 marginwidth="0" marginheight="0">
<%
String dbURL="jdbc:oracle:thin:@lloyds.unitedkingdom.ncr.com:1521:smacdev";
String dbUSER="agents";
String dbPW="smac_us";
String Resrce = request.getParameter("Resrce"); String Appln = request.getParameter("app"); String Subres = request.getParameter("Submit Resource"); String Subapp = request.getParameter("Submit Application"); Connection con = null;
if (!Subres.equals (null)) {
try
Class.forName("oracle.jdbc.driver.OracleDriver");
con = DriverManager.getConnection(dbURL, dbUSER, dbPW); } catch(SQLException e) { System.err.println("Failure to connect " + e.getMessage()); }
if (!Subres.equals (null)) {
try
String sqlstring = "Select app.application, res.resorce, res.system, res.status, res.unitofworkname, res.unitofworkvalue, res.capturetimestamp from agents.Resorce res, agents.applicationresource app where res.resorce = app.resorce and res.system = app.system and upper(res.resorce) = upper('"+ Resrce + "') order by 3";
//out.println(sqlstring);
//out.println(Subapp);
//out.println(Subres);
//commented this out, but enable you to see SQL that is been executed !!!
Statement stmt = con.createStatement();
ResultSet res = stmt.executeQuery(sqlstring);
int count =0;
%>
<table width ="380" border="0" align="center">
<h1 align="center">Resource Level Reporting</h1>
</table>
<br>
<table width="200" border="6" align="center" >
<th bgcolor="#FF9933">System<th bgcolor="#FF9933">Resource<th
bgcolor="#FF9933">Application<th bgcolor="#FF9933">Unit Of Work Name<th
bgcolor="#FF9933">Timestamp <th bgcolor="#FF9933">Unit Of Work Value<th
bgcolor="#FF9933">Status<tr>
<%
while (res.next()){
String app= res.getString(1);
String resorce = res.getString(2);
String system = res.getString(3);
String status = res.getString(4);
String unitofworkname = res.getString(5);
String unitofworkvalue = res.getString(6);
String capturetimestamp = res.getString(7);
String timestampmod = capturetimestamp.substring (0,19);
String status1 = status.trim();%>
<% if (status1.equals ("SYNC")) { %>
<tr>
<td bgcolor="#00FF33">
<%out.print(system);%>
<td bgcolor="#00FF33">
<%out.print(resorce);%>
<td bgcolor="#00FF33">
<%out.print(app);%>
<td bgcolor="#00FF33">
<%out.print(unitofworkname);%>
<td bgcolor="#00FF33">
<%out.print(timestampmod);%>
<td bgcolor="#00FF33">
<%out.print(unitofworkvalue);%>
<td bgcolor="#00FF33">
<%out.print(status);%>
<% }
else if (status1.equals ("OOS")) { %>
<tr>
<td bgcolor="red">
<%out.print(system);%>
<td bgcolor="red">
<%out.print(resorce);%>
<td bgcolor="red">
<%out.print(app);%>
<td bgcolor="red">
<%out.print(unitofworkname);%>
<td bgcolor="red">
<%out.print(timestampmod);%>
<td bgcolor="red">
<%out.print(unitofworkvalue);%>
<td bgcolor="red">
<%out.print(status);}%>
<%
res.close();
stmt.close();%>
<tr>
</table>
<%
catch (SQLException e) {
out.println("Sql error here " + e.getMessage());
finally {
con.close();
%>
<%
if (!Subapp.equals (null)) {
try
String sqlstring = "Select app.application, res.resorce, res.system,
res.status, res.unitofworkname, res.unitofworkvalue, res.capturetimestamp
from agents.Resorce res, agents.applicationresource app where res.resorce =
app.resorce and res.system = app.system and upper(res.resorce) = upper('"+
Resrce + "') order by 3";
//out.println(sqlstring);
//out.println(Subapp);
//out.println(Subres);
//commented this out, but enable you to see SQL that is been executed !!!
Statement stmt = con.createStatement();
ResultSet res = stmt.executeQuery(sqlstring);
int count =0;
%>
<table width ="380" border="0" align="center">
<h1 align="center">Resource Level Reporting</h1>
</table>
<br>
<table width="200" border="6" align="center" >
<th bgcolor="#FF9933">System<th bgcolor="#FF9933">Resource<th
bgcolor="#FF9933">Application<th bgcolor="#FF9933">Unit Of Work Name<th
bgcolor="#FF9933">Timestamp <th bgcolor="#FF9933">Unit Of Work Value<th
bgcolor="#FF9933">Status<tr>
<%
while (res.next()){
String app= res.getString(1);
String resorce = res.getString(2);
String system = res.getString(3);
String status = res.getString(4);
String unitofworkname = res.getString(5);
String unitofworkvalue = res.getString(6);
String capturetimestamp = res.getString(7);
String timestampmod = capturetimestamp.substring (0,19);
String status1 = status.trim();%>
<% if (status1.equals ("SYNC")) { %>
<tr>
<td bgcolor="#00FF33">
<%out.print(system);%>
<td bgcolor="#00FF33">
<%out.print(resorce);%>
<td bgcolor="#00FF33">
<%out.print(app);%>
<td bgcolor="#00FF33">
<%out.print(unitofworkname);%>
<td bgcolor="#00FF33">
<%out.print(timestampmod);%>
<td bgcolor="#00FF33">
<%out.print(unitofworkvalue);%>
<td bgcolor="#00FF33">
<%out.print(status);%>
<% }
else if (status1.equals ("OOS")) { %>
<tr>
<td bgcolor="red">
<%out.print(system);%>
<td bgcolor="red">
<%out.print(resorce);%>
<td bgcolor="red">
<%out.print(app);%>
<td bgcolor="red">
<%out.print(unitofworkname);%>
<td bgcolor="red">
<%out.print(timestampmod);%>
<td bgcolor="red">
<%out.print(unitofworkvalue);%>
<td bgcolor="red">
<%out.print(status);}%>
<%
res.close();
stmt.close();%>
<tr>
</table>
<%
catch (SQLException e) {
out.println("Sql error here " + e.getMessage());
finally {
con.close();
%>
</BODY>
</FORM>
</HTML>
I think the error messages I am getting are :-
[15/09/04 12:38:36:535 BST] 45b5f97b WebGroup I SRVE0180I: [SMAC Web Front End] [smac] [Servlet.LOG]: /JSP/Resreports.jsp: init
[15/09/04 12:39:08:510 BST] 7abd7978 WebGroup I SRVE0180I: [SMAC Web Front End] [smac] [Servlet.LOG]: /JSP/Resreports.jsp: init
[15/09/04 12:39:15:273 BST] 7abd7978 WebGroup E SRVE0026E: [Servlet Error]-[]: java.lang.NullPointerException
     at org.apache.jsp._Resreports._jspService(_Resreports.java:117)
     at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java(Compiled Code))
     at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
     at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java(Compiled Code))
     at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java(Compiled Code))
     at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.service(JspServlet.java(Compiled Code))
     at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
     at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java(Compiled Code))
     at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java(Compiled Code))
     at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java(Compiled Code))
     at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java(Inlined Compiled Code))
     at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java(Compiled Code))
     at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java(Compiled Code))
     at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java(Inlined Compiled Code))
     at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java(Compiled Code))
     at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java(Compiled Code))
     at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java(Compiled Code))
     at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java(Compiled Code))
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     at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java(Compiled Code))
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You make your comparisons like this:
if (!Subapp.equals (null))
Well, what happens if Subapp IS equal to null. The .equals method call will be called from a NULL and you will get a NullPointerException.
When testing for null you do:
if (Subapp == null) (or if (Subapp != null)
This is okay when dealing objects even with the mantra of 'don't use == to compare objects, because what you are really testing is if the reference points anywhere, and == will compare the reference.
Also, next time you post, make sure to use the [code] tags as described in the [Formatting Help] link. It will make it easier to read.
Also, you should try to remove the SQL from the JSP. Move it into a Servlet which builds a List that forwards to another JSP for display, or use a bean. Using java classes like Servlets and JavaBeans makes it easier to debug, and makes your JSP code easier to manage.

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This question pertains to linking a Crystal Report by parameter values to the OWOR table in SAP B1, and automatically passing those parameter values from the active record in SAP. Several other tables are used in sql joins, but the report is generated from an OWOR production order. I should start by stating that the report works great when manually populating the parameter fields when SAP calls for them.
Overview:
I've written a report in Crystal that contains several sub reports, some of which are looking to the DocEntry field as the parameter (DocKey@) and others that do not look to the DocEntry field at all - but rather use another field on the form to pull up information that spans more than just that one production order. I've chosen to upload as a layout in SAP (as that is all I've worked with up to this point, and it seems it needs to be to automate from a production order); but as I continue to research, it appears DocKey@ is mandatory when uploading as a layout, and in order to view the report from the actively selected production order, it must be a layout. Does that mean the parameter is required in all sub reports? Is it required in any sub report?
I have two main issues that I need to hurdle for this report to work how I would like it to:
1. Three of the eight Commands (one main command and seven sub-report commands) use the DocKey@ as the parameter to pass from SAP back to Crystal. The main report command, as well as four of the sub reports/commands are looking to another field in the OWOR record - which happens to be a re-seller defined field (UDF). For all intensive purposes, let's call this field BatchID. I'm assuming the sub report commands run in succession, one after the next. The reason I need to use BatchID as the parameter to pull from the record, rather than DocEntry, is there are other records that contain the same BatchID, and I want all of the info pertaining to that BatchID to populate on the report.
Q1: The first command containing DocKey@ is automatically populated by SAP, and the user does not have to key that one in. However, the next two DocKey@ parameters do not automatically populate, and the user is asked for those values. How can I fix this?
Q2: How can I automate the passing of BatchID so the user does not have to fill it in 5 times when they wish to preview the report(layout)? Can I link ObjectID@ to any field in OWOR? Is there any other way like creating a stored procedure or something , to automate the passing of that variable from the SAP active record to the crystal report - so the user doesn't have to key it in several times just to pull up the report?
Thank you so much for even reading, let alone helping me with this issue!!
Cheers,
Nick

          Hi
          I had the same problem. Take a look at this newsgroup article on the businessobjects
          website :
          http://support.businessobjects.com/library/kbase/articles/c2015264.asp
          Grieg
          "Rada Pickens" <[email protected]> wrote:
          >
          >Hi,
          >
          >I'm getting the same error message, I was wondering if you fixed the
          >problem.
          > I'm stumped, can you help?
          >
          >Rada
          >
          >
          >"JAI" <[email protected]> wrote:
          >>
          >>I am passing parameters, from the JSP page to Crystal Report, i took
          >>the code from
          >>the below mentioned url, i dont know, it is something wrong with the
          >>jsp page
          >>or crystal report.
          >>i have created parameter field in crystal report to receive the value
          >>from the
          >>jsp page.
          >>If u r not clear with the error, please reply to me.
          >>
          >>i took the code from the below mentioned page
          >>
          >>reference page:
          >>----------------------
          >>http://dev2dev.bea.com/trainingevents/webinars/012804_faq.jsp
          >>parameterFieldsViewReport.jsp
          >>
          >>
          >>error displaying in the jsp page
          >>-----------------------------------
          >>com.crystaldecisions.report.web.viewer.CrystalReportViewer
          >>Some parameters are missing values
          >

Passing parameters from one form to another

Hi,
I'm trying to pass parameters from 1 form to another. I would be able to call the form, but the parameters are not passed to the calling form. I do not know what's the problem. Basically, the 2nd form shows up with blank values in all the fields. Below is my code. Anybody expert in this, pl. help.
By the way my 1st form is based on PROCEDURE.
declare
s_requestor           number(10);
s_customer_impact      varchar2(4000);
s_creation_date      date;
l_url                varchar2(4000);
blk               varchar2(10) := 'DEFAULT';
begin
p_session.set_value(
p_block_name => blk,
p_attribute_name => 'A_P_REQUESTOR',
p_value => 88888);
s_requestor := p_session.get_value_as_number
(p_block_name => blk,
p_attribute_name => 'A_P_REQUESTOR');
s_customer_impact := p_session.get_value_as_varchar2
(p_block_name => blk,
p_attribute_name => 'A_P_CUSTOMER_IMPACT');
s_creation_date := p_session.get_value_as_date
(p_block_name => blk,
p_attribute_name => 'A_P_CREATION_DATE');
l_url:=('/pls/portal/PORTAL.wwa_app_module.link?
p_arg_names=_moduleid&p_arg_values=1794837934&
p_arg_names=_show_header&p_arg_values=YES&
p_arg_names=REQUESTOR&p_arg_values='||s_requestor||'&
p_arg_names=CREATION_DATE&p_arg_values='||s_creation_date||'&
p_arg_names=CUSTOMER_IMPACT&p_arg_values='||s_customer_impact);
PORTAL.wwa_app_module.set_target(l_url);
end;

the way to call one form from another and pass values for parameters from the procedure is like this:
PORTAL.wwa_app_module.link (
p_arg_names => PORTAL.wwv_standard_util.string_to_table2('_moduleid:_show_header:REQUESTOR:CREATION_DATE'),
p_arg_values => PORTAL.wwv_standard_util.string_to_table2('1191314879:YES:'||s_requestor||':'||s_creation_date));
and so on.
Hope it works for you

Passing parameters from dynpro to a web dynpro

Hi all,
we have following scenario: a user starts a web dynpro, fills in the week and push a button. By this, an interactive form is created, with the users personal ID and the week, so the user can maintain his worked times.
Now our problem is that we want to go into that interactive form skipping the web dynpro, i.e. we don't know how to pass parameters from a dynpro to a web dynpro.
Do someone have a clue how we can do that? I would highly appreciate any help.
Many thanks in advance
Regards
Anna

hi anna
please check the following links it is explains simple webdynpro java examples which is using interactive forms.
http://help.sap.com/saphelp_nw04s/helpdata/en/dc/f1783fe3263042e10000000a114084/frameset.htm
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/2b6db1c4-0801-0010-faa5-ff4b4df55b45
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/b0d60ac9-3f59-2a10-4a86-a612d41c24e4
Thanks and Regards
shanto aloor

Pass parameters from JSP Dyn Page to WDJ Application

Hi,
I am trying to pass parameters from my JSPDyn Page to WDJ Application.
I am using NWDS 7.1 EHP1
My code is :
function to_WEBDYNHK()
      EPCM.relaxDocumentDomain();
      EPCM.doNavigate
    ('ROLES://pcd:portal_content/Himanshu.Himanshu/TestDynUIApp?DynamicParameter="hkparam%3Dqwertyuio"');
This method is being called on click of a button.
hkparam is the parameter in question.
The JSPDyn page is an iView and the WDJ application is a page and both have been assigned to a role.
In the properties of the WDJ Page, I have removed DymanicParameter from "Do not Forward These Parameters To Web Dynpro" property.
However I am getting null as the value of hkparam in my WDJ application.
The code used is :
IWDRequest request = WDProtocolAdapter.getProtocolAdapter().getRequestObject();
       String param1= request.getParameter("hkparam");
What seems to be missing here.
Please help.
I went through the documentation on SDN but it does not seem to help.
TIA,
Himanshu

Hi Himanshu,
Try this code.
EPCM.doNavigate("ROLES:portal_content/Himanshu.Himanshu/TestDynUIApp?hkparam=Dmypass1123")
if the parameter is hkparam and the value to be passed is Dmypass1123. You need not change any design time property of the WD page, and WDProtocolAdapter should retrive the parameter.
Regards,
Vishweshwara P.K.M.

Calling a Stored Procedure with output parameters from Query Templates

This is same problem which Shalaka Khandekar logged earlier. This new thread gives the complete description about our problem. Please go through this problem and suggest us a feasible solution.
We encountered a problem while calling a stored procedure from MII Query Template as follows-
1. Stored Procedure is defined in a package. Procedure takes the below inputs and outputs.
a) Input1 - CLOB
b) Input2 - CLOB
c) Input3 - CLOB
d) Output1 - CLOB
e) Output2 - CLOB
f) Output3 - Varchar2
2. There are two ways to get the output back.
a) Using a Stored Procedure by declaring necessary OUT parameters.
b) Using a Function which returns a single value.
3. Consider we are using method 2-a. To call a Stored Procedure with OUT parameters from the Query Template we need to declare variables of
corresponding types and pass them to the Stored Procedure along with the necessary input parameters.
4. This method is not a solution to get output because we cannot declare variables of some type(CLOB, Varchar2) in Query Template.
5. Even though we are successful (step 4) in declaring the OUT variables in Query Template and passed it successfully to the procedure, but our procedure contains outputs which are of type CLOB. It means we are going to get data which is more than VARCHAR2 length which query template cannot return(Limit is 32767
characters)
6. So the method 2-a is ruled out.
7. Now consider method 2-b. Function returns only one value, but we have 3 different OUT values. Assume that we have appended them using a separator. This value is going to be more than 32767 characters which is again a problem with the query template(refer to point 5). So option 2-b is also ruled out.
Apart from above mentioned methods there is a work around. It is to create a temporary table in the database with above 3 OUT parameters along with a session specific column. We insert the output which we got from the procedure to the temporary table and use it further. As soon the usage of the data is completed we delete the current session specific data. So indirectly we call the table as a Session Table. This solution increases unnecessary load on the database.
Thanks in Advance.
Rajesh

Rajesh,
please check if this following proposal could serve you.
Define the Query with mode FixedQueryWithOutput. In the package define a ref cursor as IN OUT parameter. To get your 3 values back, open the cursor in your procedure like "Select val1, val2, val3 from dual". Then the values should get into your query.
Here is an example how this could be defined.
Package:
type return_cur IS ref CURSOR;
Procedure:
PROCEDURE myProc(myReturnCur IN OUT return_cur) ...
OPEN myReturnCur FOR SELECT val1, val2, val3 FROM dual;
Query:
DECLARE
MYRETURNCUR myPackage.return_cur;
BEGIN
myPackage.myProc(
MYRETURNCUR => ?
END;
Good luck.
Michael

Passing Parameters from One Screen to Another Screen

Hi All,
I need to Pass Parameters from one Module Pool Screen to Another Screen.
I have two Parameters in First screen. I don't want to use <b>Export and Import</b>
The first screen record should sit in the Second Screen as it is.
Please suggest me.
Thanks and Regards,
Prabhakar Dharmala

An Idea,
Create a function group, in that define global variables. Then create two function module. Pass variable from one function module and get in the another one.
Hope this will help you to solve. If you need further help I will create and sent you a test code.
Darshan.
<i><b>Pl. Reward points to the helpful answer, it motivates us to answer more </b></i>

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