Calling an On Demand Process

Dear HTML DB Team,
In my application, I have defined two PL/SQL Anonymous Block "on demand" application processes. Is there a line of code that I can include in application process A to call application process B?
Process B is called by several pages, but also needs to be included as part of Process A.
Thanks,
Chaunaci

Chaunaci,
No, this cannot be done.
Scott

Similar Messages

Calling an On Demand Process in PL/SQL Region without using AJAX

Hi!
I am trying to find a way to call an On demand Process in a PL/SQL Reports Region. The reason is that i need Reportings for about 20 Pages that look like the same but have different parameters. I already have some Processes that return SQL Statements and it works fine. But these Reportings are more complex and it's not possible to return it wirh a SQL Statement.
I have seen some solutions in this forum that used AJAX to call such a process. The problem is, that I'm not allowed to use AJAX because activeX is diabled. I tried it and it works but i need another way to solve this process call.
Thanks in advance
Philipp

At the moment I cannot say if your link can help. Right now the call of the On demand Process looks like this:
Inside annonymous PL/SQL Region:
<script type="text/javascript">
get = new htmldb_Get(null,'||:APP_ID||'.,'APPLICATION_PROCESS=F_REPORT_NAME',0);
gReturn = get.get();
document.write(gReturn);
</script>

Help on Javascript call APEX on demand process

Hi, Guys:
I have a problem needs help: I need to add session protection with checksum for one of my page (page 2); but I have another page (page 1) which displays a Gogle map with a marker with infowindow, in this infowindow there should be a link that leads to my page 2. The problem is: my link needs checksum on demand. So I did the following thing:
#1 add session protection with checksum on page 2.
#2 add two application items requires checksum: CURRENT_URL, URL_WITH_CHECKSUM
#3 add a on demand application process URL_Checksum as follows:
DECLARE
l_url varchar2(2000);
BEGIN
select APEX_UTIL.PREPARE_URL(
p_url => :CURRENT_URL,
p_checksum_type => 'SESSION') into l_url from dual;
:URL_WITH_CHECKSUM:= nvl(l_url,:CURRENT_URL);
htp.prn(:URL_WITH_CHECKSUM);
END;#4 rewrite javascript as follows:
<img src="#WORKSPACE_IMAGES#1938.JPG"\><script type="text/javascript"       src="http://maps.googleapis.com/maps/api/js?sensor=false">     </script>
<script type="text/javascript">
function initialize() {
var myOptions = { zoom: 18, mapTypeId: google.maps.MapTypeId.ROADMAP};
var map = new google.maps.Map(document.getElementById("map"), myOptions);
var markerBounds = new google.maps.LatLngBounds();
var point=new google.maps.LatLng(&P1_H_MARK_GEOCODING.);
markerBounds.extend(point);
map.fitBounds(markerBounds);
var listener = google.maps.event.addListener(map, "idle", function() {
map.setZoom(map.getZoom()-4);
google.maps.event.removeListener(listener);
var marker;
marker = new google.maps.Marker({ position: new google.maps.LatLng(&P1_H_MARK_GEOCODING.), map: map });
var infowindow = new google.maps.InfoWindow({    content: "&P1_TF_OFFENDER_ID."});
var test_prefix = "http://apex.oracle.com/pls/apex/f?p=";
var current_parameter ="&APP_ID.:2:&SESSION.::NO::P2_H_OFFENDER_ID:"+"&P1_TF_OFFENDER_ID.";
var my_URL=test_prefix +encodeURIComponent(current_parameter);
//alert(my_URL);
//var get = new htmldb_Get(null,$x('pFlowId').value,'APPLICATION_PROCESS=URL_Checksum',PAGE);
//get.add('CURRENT_URL',my_URL);
//gReturn = get.get();
//get = null;
//alert(gReturn);
infowindow.setContent('<a href='+my_URL+'>&P1_TF_OFFENDER_ID.</a>');
google.maps.event.addListener(marker, 'click', function() { infowindow.open(map,marker);});
</script> Note: I comment the part related to AJAX call and use variable my_URL, as there is a problem: infowindow is no longer available after I uncomment this part and uses gReturn as URL in the infowindow. Could anyone help me on this?
My application on apex.oracle.com:
workspace: LIAPEXTEST
acc: [email protected]
pwd: lxus2000
application ID: 55785 - test AJAX
Thanks a lot!
Sam

Hi, Jari:
I am required to set session protection with checksum required level for one page (offender detail) in my project, as this page displays sensitive information. Ths page will show content depending on offender_id. However, some of offender_ID is NOT open to public. Right now people can easily manuplate URL by changing offender_Id value in URL, so they can see information that is not open to them. That is the reason that I need to add session protection for that page.
However, on the other side, I need to provide Google map for radius search offenders. The infowindow of markers should include link which leads to offender detail page as well. Therefore, I have add checksum for URL in infowindow to let users access offender detail page through link in the infowindow. Otherwise, the link in infowindow won't work.
I thouht about generating URL with checksum on page loading. But there are hundreds of markers that need URL with checksum, I do not know how to pass it into javascript.
Could you give me a suggestion about it?
Thanks for your time.
Sam
Edited by: lxiscas on Aug 26, 2012 12:35 PM

Calling ON DEMAND process for outside APEX

Hi All,
I would like to call an ON DEMAND process from outside APEX (using HttpClient java class). I think i have to use wwv_flow.accept but i'm bit lost on how to specify that i'm calling a process on demand.
Has someone already tried this ? samples or advices would be more then welcome ... The goal behind the scene , would be to have an Apex page acting like a servlet (HTTPClient send a xml request and receive an XML response from the apex page).
Thks.
Thierry

Thierry,
You need to set up the HTTP request as you would if invoking your application+process from a URL, e.g.,
..f?p=100:0:9876543210123456789:APPLICATION_PROCESS=<name of process>
..in which request header the authentication cookie is provided, and in which request the correct session ID is provided. You could alternatively do a POST to wwv_flow.show, bypassing the f procedure, but I don't know if that will save you any steps.
Scott

Error while using ajax addParam function in on demand process

Hi ,
I am calling an on demand process from a javascript that inserts value from a modal from into a table.
function f_insert_transaction()
var ajaxRequest = new htmldb_Get(null, $v('pFlowId'), 'APPLICATION_PROCESS=insert_manual_transaction',73);
          ajaxRequest.addParam('x01', $v('P73_ARRANGEMENT_ID'));
          ajaxRequest.addParam('x02', $v('P73_TRANSACTION_DIALOGID'));
          ajaxRequest.addParam('x03', $v('P73_CUSTOMER_NAME'));
          ajaxRequest.addParam('x04', $v('P73_CUSTOMER_NUMBER'));
ajaxRequest.addParam('x05', $v('P73_SALES_ORDER'));
ajaxRequest.addParam('x06', $v('P73_SO_LINE'));
ajaxRequest.addParam('x07', $v('P73_INVOICE'));
ajaxRequest.addParam('x08', $v('P73_INVOICE_LINE'));
ajaxRequest.addParam('x09', $v('P73_ITEM'));
ajaxRequest.addParam('x10', $v('P73_ITEM_DESC'));
var ajaxResult = ajaxRequest.get();
alert(ajaxResult);
ajaxRequest = null;
}The insert works fine as long as item names range from x01 - x10.
When I add the below
ajaxRequest.addParam('x11', $v('P73_QUANTITY')); The insert stops working, and the alert displays the following error message :
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML><HEAD>
<TITLE>404 Not Found</TITLE>
</HEAD><BODY>
<H1>Not Found</H1>
The requested URL /pls/dev1/wwv_flow.show was not found on this server.<P>
<HR>
<ADDRESS>Oracle-Application-Server-10g/10.1.2.0.0 Oracle-HTTP-Server Server at </ADDRESS>
</BODY></HTML>
Appreciate any help in debugging this
Thanks,
Dippy
Edited by: Dippy on Aug 2, 2010 10:14 AM

Hello:
You could concatenate the page-item values into a single string where the values are separated from each other by a suitable delimiter ( a colon for example) and set, x01, to this concatenated value. You could then decompose this concatenated string in the ODP used in the AJAX call to obtain the individual values.
varad

On demand process: addtional params

Hello,
I'm calling a on demand process just with the url.
http://localhost:8080/apex/f?p=200:0:0:APPLICATION_PROCESS=test
how is it possible to add additional GET parameters without writting them into a page-item/application-item?
thank you
Damien

Hi,
You can set in url items value. like
http://localhost:8080/apex/f?p=200:0:0:APPLICATION_PROCESS=test:::Px_MY_ITEM:value1Check URL syntax
http://download.oracle.com/docs/cd/E17556_01/doc/user.40/e15517/concept.htm#sthref114
Regards,
Jari

How to call an "ON DEMAND" application process

Dear HTML DB Team,
With HTML DB you can define "on demand" application processes. ("On Demand: Run this application process when requested by a page process.") These should be callable from page processes.
How should a call in a page process to such an "on demand process" be written?
Tried several options, no success. Please help.
Could not find any information in this forum or html.pdf and help.
Regards, Erik

when you create an application-level process in htmldb, you have the option of creating it with a "Point" of "On Demand: Run this application process when requested by a page process". after doing that, you can then add processes to your htmldb application pages with a "Type" of "On Demand - Run an 'on-demand' application process". the next screen after indicating that Type lets you choose the On Demand process you'd like to use.
hope this helps,
raj

Retrieve data/files fro HTTP POST request in On-Demand process

Hello,
I would like to integrate https://github.com/blueimp/jQuery-File-Upload to my APEX 4.2 application inside XE11g. I would like to use this kind of jQuery component, multiple file upload, use Drag & Drop, image resize, size limit, filter extensions etc...
This jQuery component and also others javascript uploaders sends data files to some defined URL. Developer need to build some servlet, php script or something on server side that will read files from HTTP request and stores it somewhere.
Do you know how to do it in APEX? How can I read data from HTTP POST request in PL/SQL? Now I can only call my On-Demand application process from javascript, but I am not able to read any data from HTTP POST in it.
Can I do it in APEX, or using MOD_PLSQL?
I would like to implement this:
1) some javascript uploader will call some URL of my application and sends HTTP POST with data files
2) I will read data files from HTTP POST and store them into database
3) I will create some HTTP response for javascript uploader
Thank you for some tips

I know about that existing plugin " Item Plugin - Multiple File Upload"
But I doesn't work in IE and has only basic features. Licence for commercial use is also needed. I would like to use some existing jQuery plugin. There are many of these plugins with nice features. And only one problem is that I need to create some server side process/servlet/script.. that can recieve HTTP request, get files from it and stores them into DB.

Possible to download file using ajax on demand process?

In the past I've used procedures with the wpg_docload.download_file function to download files by granting public to the procedure and executing the download from a report link (such as http://localhost:8080/apex/schema_name.download_blob?file_in=xxx)
I'd like to move to the download to a link that's called from an ajax called on demand process. Is this possible? I have got the report link calling a javascript function passing the rowid in and running the same download_blob procedure via the on demand process but, whilst the code runs OK it does not return the prompt box for the user to open/save the file. I guess this might be because it's not returning it to the javascript in the proper way but I'm v flaky wrt to ajax.
var ajaxRequest = new htmldb_Get( null , &APP_ID. , 'APPLICATION_PROCESS=download_blob' , 0);
var ajaxResult = ajaxRequest.get();
Thanks
Simon

To be honest, it's not a big deal, I wanted to do it this way as we have data stored as BFILES and some of the downloads are so big they take a while to load into a temp_blob and thus I wanted to call it from java script so I could call a loading "div" 1st, so the user does not see the screen hanging. However I've changed the code to load the BFILE into an actual blob 1st (through an ajax process) and then return a link to the screen pointing to an app process which opens the blob.

Can you call a plsql application process from a validation?

Can you call an on-demand plsql application process from a page validation?
Thank you,
Gayle

Gayle:
I don't think you can do that. You could consider moving the ODP into the database as a stored procedure . The stored procedure can then be referenced in the ODP and in your validation code as well.
varad

Problem with simple on demand process

hi
my on demand process
declare
art char := 'GT';
begin date := '01.01.2006';
end date := '31.01.2006';
v_count number;
begin
select wvfk.fu_working_days(ART,begin,end)
into v_count
from dual;
end;
and that's the call
function test()
var get = new htmldb_Get(null,html_GetElement('pFlowId').value,'APPLICATION_PROCESS=WORKING_DAYS',0);
gReturn = get.get();
alert(gReturn);
but the alert return nothing
what is wrong

So what is your on demand process supposed to return? You are returning a value from
dual into a variable and the process is returning no value. How about having
HTP.prn (v_count);
in your on demand process. Debug it using SQL Workshop and see what you get.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://htmldb.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

On-demand process in page processing - possible bug?

Hi
Came across a possible bug today, certainly not a big one and unlike to affect many people but...
1. Create an on-demand application process
2. Create an on-demand page process that calls the application process
3. Delete the application process.
Now at this point, the page process is still available for editing/deleting etc.
4. Copy the application.
In the new version of the application, the page process shows as plain text in the application builder with no link to edit or delete it and when the page is run, it predictably fails at the processing point of the page process when it tries to find the application process (the id from wwv_flow_processing is shown in the error for the old application process).
The only way to get rid of the page process is to select 'Edit All' and then select and delete it - then everything is hunky dory again.
A minor issue I know, but maybe someone will have the same issue one day and stumble across this thread :)
Cheers
Ben

At the moment I cannot say if your link can help. Right now the call of the On demand Process looks like this:
Inside annonymous PL/SQL Region:
<script type="text/javascript">
get = new htmldb_Get(null,'||:APP_ID||'.,'APPLICATION_PROCESS=F_REPORT_NAME',0);
gReturn = get.get();
document.write(gReturn);
</script>

ON-DEMAND Process - DB Object

Hello All,
I'm not familiar with the object storage model of APEX objects and was wondering how On-DEMAND processes are stored? Can you access them via sqlplus (toad,pl/sql dev, sql dev)?
The reason I ask, is once the app is published, is there a way to chage the pl/sql procedure attached to an on-demand process, or must you republish the entire application?
Thanks in advance.
Jan

Just as any other setting or statement you make in APEX it's stored in a database table somewhere. So you might be able to access it, but not as you expect it.
A good way of working is - to overcome - your problem, code your processes so that they contain only one line: a call to a db package/procedure/function. That way you can
1. Compile and test the implemented logic separately.
2. Change the logic without changing or redeploying the apex side of the app.

On demand process time limit.

Hello, I would like to know if Apex has time out limit on "On demand process" ? I have a long running insert query in my on demand process and I was hoping that the process will complete when the query finishes, but it doesn't seem that way. Is the time out for an on demand process the same as the time out time for Apex pages?
George

I was hoping that the process will complete when the query finishesWhy should the Ondemand process run after the PLSQL block has completed.
Do you have some kind of infinite loop happening over the ajax call ? Even so you might face something like "too much recursion" error in Javascript.

On Demand Process Javascript

I have a javascript to invoke an on demand process pass_menu_flag_to_db.
function set_reminder1(pValue, pNumber){
          var get = new htmldb_Get(null,$x('pFlowId').value,'APPLICATION_PROCESS=pass_menu_flag_to_db',0);
          get.addParam('x01', pValue);
          get.addParam('x02', pNumber);
          gReturn = get.get();
The ODP is
declare
v_number number;
v_flag char;
begin
v_number = wwv_flow.g_x01;
v_flag = wwv_flow.g_x02;
pkg_t_ul.update_ul_menu_flag(:APP_USER, v_number, v_flag);
end;
I am calling the JS function in an on click event. However, I couldn't find the ODP is excuted and hence the values are not passed to the database. I need this to be done without the page submit also.
Is there any issue with my code?
Advance thanks,
Natarajan
Edited by: Nattu on Mar 18, 2011 6:02 AM

Thanks Jari,
As I am new to use firebug, I couldn't find the xmlhttprequest in the firebug console, however looking at console, helped me that I made mistake in the plsql block in on demand process. Fixed the issue, now it is working without page submit.
I appreciate your timely help. Thanks.
Natarajan

Calling an On Demand Process

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