Notifying a forms client from the database

I would like to notify a forms client of a certain things that happens in the database.
I guess this could be done by having a timer polling a table at certain intervalls.
I my case that solution is not good because I need a fast reaction (<2 sec) which would require the client to poll in a high frequency.
Is there any way to do this?
Could I somehow embedd a java client in the form window that the database could notify and that then notifies the form client or perhaps start a back ground process that could listen to events and the notify the client somehow.
Any clues anyone?
Carl Larsson

Carl
2 Seconds doesn't sound like a particularly excessive frequency for the polling method, but it would be best combined with DBMS_ALERT as suggested by Jiri rather than looking at a table. I have had an application live for the last two years using this method involving 14 clients polling at one second intervals and have had no performance implications. DBMS_ALERT.WAITONE has the ability to wait a specified time for a reply, but this should be set to zero, so control is returned immediately to the form and all waiting is handled by the timer.
The Java method should in theory be more efficient if you have the knowledge to implement it (I don't !).

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Delete record from the form and from the database

hi,
i want delete record from the form and the database ,but the record is only delete from the from !!!
this is my code :
if //condition then
delete_record;
commit;
end if ;
Any solutions ??
thnx

You have unique key field(s) on the table you are trying to insert which actually restricts you from inserting the same value again.
When you are deleting the record and issue commit there is a record to be inserted in the table which is a duplicate that's why you are getting this unique error.
As oracle is not able to insert your commit fails and stops your deletion of record from table

How to Validate a Portal Form field from the database

I created a Portal Form based on a procedure, which requires three parameters. One of the parameters is Item Number. I need to check if the Item Number exists in database. I am trying to use pl/sql button event handler, where I try to use the select count(*) statement to verify. However, I don't know how to reference the form field in the where clause. Please advise. Or is it possible to achieve this by creating a javascript? If you go to 'Shared Component' provider and click on javascript, you will see some system validation scripts, which you can call in the form level validation. My doubts with javascipt is how I can talk to database in the script? Any input is appreciated.

Hi,
You cannot access the DB from the script. If you want to access the values of a field you should use session variables. Here is a sample to access the values of a form field.
declare
ticket_no varchar2(20);
flight_no varchar2(20);
blk varchar2(30) := 'DEFAULT';
begin
ticket_no := p_session.get_value_as_varchar2(
p_block_name => blk,
p_attribute_name => 'A_TICKET_NO');
flight_no := p_session.get_value_as_varchar2(
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Thanks,
Sharmila

How can i retrieve documents(.doc,.pdf, .txt) using forms from the database.

How can i retrieve documents(e.g .doc,.pdf, .txt etc) using forms from the database.
i inserted the documents using sql*loader, below is the control and data files.
-- control file
LOAD DATA
infile 'load.txt'
INTO TABLE husman
APPEND
FIELDS TERMINATED BY ','
(id integer external,
fname FILLER CHAR(50),
docu LOBFILE(fname) TERMINATED BY EOF)
--data file
1,../husman/dell.doc,
2,../husman/me.pdf,
3,../husman/export.txt,
in the form i have a text field to display the id and an OLE container to display the document as an icon. but when i execute query, i only get the id number and not the document.
any help will be appreciated.
Thanks
Hussein Saiger

Step by step
1. Erase all contents and settings
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3. You'll see Apple logo and progress bar
4. You'll see a big iPad logo on screen
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6. Set language
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11. Selected Restore from iCloud Backup
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17. Pre-installed apps will be restored first
18. Message: Purchased apps and media will now be automatically downloaded
19. You'll see a pageful of apps with Waiting/Loading/Installing
20. Message: Some apps cannot be downloaded, please sync with computer

Javabean for file up-/down-load to/from the database

Dear all,
Has anyone any experience in client-side customizing/extending
through the use of standard JavaBeans or
Pluggable Java Components (PJCs) within the Oracle (Web-)Forms
Developer 6i environment? We want to realize the
following:
By using a Java Bean within a (Web-)Forms 6i client that is
capable of file uploads to and file downloads from a database
(end tier).
Important requirement is to uploads/downloads files (BLOB, CLOB)
directly to/from the database, NOT TO/FROM THE FILESYSTEM.
We have found a sample JavaBean on
http://otn.oracle.com/sample_code/products/forms/content.html.
Unfortunately, this code is based on file transfering to/from
the filesystem.
Is there someone who did customizations enabling file
uploads/downloads into/from the database? Are there any
other suggestions?
Please contact:
Deep Nanda
Developer
Wolters Kluwer Academic Publishers
The Netherlands
email: [email protected]
Thanks in advance,
Deep

I've not tried this out but in theory since a Java Bean is just
a piece of Java code you could do this using JDBC. However,
while you may have a valid reason for this, it really defeats
the purpose of having a middle tier. The idea behind the web
deployment is that the bulk of the application is on a powerful
server which makes the client as light weight as possible. If
you add more functionality to the client (which is not UI
specific) then you will increase the download to the client, you
will impact the system requirements for the client and you will
probably make the application less scalable (think about if yu
have 1000 clients with database connections for the middle tier
and now all 1000 want to connect from the client as well - yuo
double the access of the database)
SO the short answer is Yes yuo can in theory - in practice I
would be very careful in deciding to move this way.
Regards
Grant Ronald
Forms Product Management

Previewing images in forms 11g from the server

Hi All,
i need your help in this issue please
i've just migrated my application from forms 6i to forms 11g
there is a function in my application that i used that previewed images that exists on a network drive that are used in an image gallary
now i don't have this setup as the application is hosted on the weblogic server
i want an alternative method that i can use to preview the images from the server
the old way was:
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i've configured the webutil but i don't know what method to use
also another functionality that i lost in the migration is opening a browser window to preview the final article that the editor entered using my application
the old way was:
declare
     url varchar2(1000);
begin
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WIN_API_SHELL.WinExec('"C:\Program Files\Internet Explorer\IEXPLORE.EXE" '||url||'',
WIN_API.SW_SHOWMAXIMIZED,TRUE);
Exception when NO_DATA_FOUND then
MESSAGE('CAN NOT FIND THE FILE');
end;
now ithe WIN_API_SHELL is not working as i'm on the server side and i don't know the alternative
please advice

Hello Nivin
If you want to read an file from local drive or from netwrok drive then before reading images please make sure that do you have full rights and have you mapped that network drive .
after that you use read_image_file built in(). secondly you configure WEBUTIL package.
please visit the following link for configuring webutil.
I configured my webutil package from this link and its worked fine.
http://www.baigzeeshan.com/2010/01/open-file-dailog-box-example-using.html
thanks
G.Yassen

Consuming a web service from the database

Hello,
We have 10.2.0.2.0 database,oas 10.1.3.0.0, jdeveloper 10.1.3.
We have to call our webservice deployed to the OAS from the database. The webservice is deployed and works fine (we can call it from a java application).
The web service itself and the client proxy have been generated by the jdeveloper.
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When we run the function we receive the following error:
calling http://z0001-app0821-s.hodc.ad.allstate.com:7779/amcddout_dvlp/DDRequesterWSSoapHttpPort java.lang.NoClassDefFoundError at HTTPClient.HttpURLConnection.<clinit>(HttpURLConnection.java:166) at oracle.j2ee.ws.saaj.client.p2p.HttpSOAPConnection.createConnection(HttpSOAPConnection.java:697) at oracle.j2ee.ws.saaj.client.p2p.HttpSOAPConnection.post(HttpSOAPConnection.java:347) at oracle.j2ee.ws.saaj.client.p2p.HttpSOAPConnection$PriviledgedPost.run(HttpSOAPConnection.java:796) at java.security.AccessController.doPrivileged(Native Method) at oracle.j2ee.ws.saaj.client.p2p.HttpSOAPConnection.call(HttpSOAPConnection.java:149) at oracle.j2ee.ws.client.http.HttpClientTransport.invokeImpl(Unknown Source) at oracle.j2ee.ws.client.http.HttpClientTransport.invoke(Unknown Source) at oracle.j2ee.ws.client.StreamingSender._sendImpl(StreamingSender.java:169) at oracle.j2ee.ws.client.StreamingSender._send(StreamingSender.java:110) at com.amc.dd.ws.test.runtime.DDRequesterWSSoapHttp_Stub.sendMessage(DDRequesterWSSoapHttp_Stub.java:77) at com.amc.dd.ws.test.DDRequesterWSSoapHttpPortClient.sendMessage(DDRequesterWSSoapHttpPortClient.java:42) at com.amc.dd.WsTest.callWS(WsTest.java:12)
Has anybody had the same problem?
Thank you
Kate

Hi, I've dropped and reloaded all jars, and it started to work.
Just in case someone else is struggling with the same problem, here is our configuration:
10.2.0.2.0 database,oas 10.1.3.0.0, jdeveloper 10.1.3.
Here is the command I've used to load the libraries:
loadjava -u %CONN_STR% -r -v -f -genmissing -s -grant public %ORACLE_HOMEj%\soap\lib\soap.jar %ORACLE_HOMEj%\lib\dms.jar
%ORACLE_HOMEj%\jlib\javax-ssl-1_1.jar %ORACLE_HOMEj%\j2ee\home\lib\servlet.jar %ORACLE_HOMEj%\j2ee\home\lib\mail.jar
%ORACLE_HOMEj%\j2ee\home\lib\activation.jar %ORACLE_HOMEj%\j2ee\home\lib\http_client.jar
%ORACLE_HOMEj%\j2ee\home\lib\ejb.jar %ORACLE_CALLOUT%\dbwsclientws.jar %ORACLE_CALLOUT%\dbwsclient
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dbms_java.grant_permission( 'myuser', 'SYS:java.lang.RuntimePermission', 'getClassLoader', '' )
dbms_java.grant_permission( 'myuser', 'SYS:java.lang.RuntimePermission', 'accessClassInPackage.sun.util.calendar', '' )
dbms_java.grant_permission( 'myuser', 'SYS:java.util.PropertyPermission', 'HTTPClient.socket.idleTimeout', 'write' )

Crystal Reports - Failed to retrieve data from the database

Hi There,
I'm hoping that somebody can help me.
I've developed a crystal report from a stored procedure which I wrote. I can execute the stored procedure within SQL Server and within the Crystal Reports designer without any errors. Furthermore, I have imported the report into sap and can run it within SAP from the server without any errors. SAP version 8.81 PL5
The issue is that when it's run from a client machine, I get the following error: "Failed to retrieve data from the database. Details: Database Vendor Code: 156. Error in the File RCR10010 {tempfile location}
Here's a list of things which I have tried, all to no avail:
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- Exported the report and reviewed the datasource connection and re-imported to SAP.
- Tried to run the report on multiple machines to ensure that it's not machine specific
- Tried to run the report using different users to ensure it's not user specific.
- Tested other reports built from stored procedures on client machines to ensure that they work.
Any assistance in this would be GREATLY appreciated.
Thank you

After further testing, we found that the report could be run within SAP on any work station which had the CR designer installed on it.
As it turns out, the procedure which I wrote has temp tables in it. The runtimes built into the SAP client install do not support creating temp tables when executing the report from within SAP. Which is why the report could not retreive data.
To work around this, I installed external runtimes which were the same version of the Crystal Report and now the report can be run within SAP from any workstation which has the external runtimes (and not just the runtimes within the SAP client).
I hope this makes sense.

ONLY ONE FIELD DOES NOT GET PREPOPULATED FROM THE DATABASE

I would really, really appreciate if someone can comment or suggest something that would help with the resolution to the issue I am currently experiencing.
Simple sample form that explains the issue can be accessed from the link below.
How to test the form:
Open the form.
Click on the yellow button to add new Task.
The problem is with Additional Product fields ( in blue). You can add as many of them as you want by clicking on the Red button with the +. Add some data and uploade in database. When you download it from the database, data will come back fine for all of them, except for the first one.
Any ideas or help would be greatly appreciated.
https://acrobat.com/#d=2vFWOlm56FmrC4owzpfHew
The code is behind the Red button with the +. Very simple. Perhaps is the indexing issue with the database. I do not know enough about it, to be able to send any suggestion to the DB guy.
According to the DB guy, data uploades without issue. It is the blank field when the form with data is downoloaded.

It might be related to http://forum.java.sun.com/thread.jspa?threadID=583466&messageID=2988344

How do I remove a row from the database?

Guys and Gals,
I'm using Studio Edition Version 11.1.1.3.0.
The code below will delete a row from my table, but how do I actually delete the row from the database as well?
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>
The problem in your case is that this removes the row from the iterator but not your business service. EJB exposes explicit methods to remove an entity. A method lime removeEmployees(employee) >expsed on the EJB model must be called.
You can drag and drop the "removeEmployees" method then as a button to your page. Rename the text label to "Remove" or "Delete". In the opened dialog box, point the method argument to the >following EL #{bindings.iteratorName.currentRow.dataProvider}. Next time you press the button, the row is deleted from the iterator and the business service
Huh? So to delete the row, I need to expose a method. But where? Do I do this in the AppModuleImpl so I can expose it to the Client Interface? But then how do I access entities? And what data type is the #{bindings.iteratorName.currentRow.dataProvider}?
If anyone could point me in a general direction, it'd be great.

Frank and Shay,
Thank you both for your posts. I'm amazed there's such a great place to get help. Between the forums, ADF code corner, Not Yet Documented ADF Samples, various blogs and tutorials, it's obvious you guys really care about what you do.
On my example, that approach doesn't seem to work. I tried following it like so in one of the video tutorials by Shay: http://blogs.oracle.com/shay/2010/04/doing_two_declarative_operatio.html. Following Shay's approach, in my particular case, deletes only from the table. Perhaps it is due to my iterator / collection setup?
TipsSelector (1 to 1) -> TipsView (1 to *)-> DependentBom -(1 to * Recursive)> RecursiveBom
TipsSelector references the same View Object as TipsView, but it is set as a 1 to 1 relationship so that I can show TipsView on the page one record at a time. This is the same setup as Tuhra2's hierarchy veiwer example. TipsView / DependentBom is a classic parent / child setup. RecursiveBom is DependentBom referencing itself. Think of it as departments within departments within departments etc...
I have dragged TipsSelector's Named Criteria (All Queriable Attributes) onto my page and created an ADF Query with Table. A remove button on the table's toolbar calls the two actions, Delete (from TipsSelector's iterator) and then Commit. I have modified the code slightly from my previous post but the end result seems to be the same.
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    operationBinding.execute();
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This is beyond me. Am I somehow deleting from the query results but not the database?

How to install Pro*C apart from the database?

I would like to know how one could Pro*C apart from the database. Thanks.

Just unzip all Instant Client zip files in the same directory, they all have "instantclient_11_2" as first path element,
so everything will end up in the right place in this directory.
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Viewing a PDF from the database

Ok I am now finally down to the last thing that I need to get working on my program, at least for the time being. I am still doing research trying to find out how to do it but so far it has been unsuccessful, I am trying to make it so that the user can select a file on the database and then display that file in PDF form (the file is already in PDF) and then once it is displayed they can do whatever with it. I've already got the selecting the file taken care of now I'm just trying to figure out how to get the selected file to display on the screen.

is there a way to download the file to a temp folder on the app server and then display it from thereIn order to write your file from the Database Server (DS) to the Application Server (AS) you will have either have the DS and AS be the same server or you will have a shared drive that is accessible from both servers. I personally like the use of shared drives. The reason for this is that the RDMBS can only read/write to the file system of the DS; conversly, the AS can only read/write to the file system of the AS. With a shared drive (Mount Point) the AS and DS can write to the same directory.
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If someone's response is helpful or correct, please mark it accordingly.

CAN I PASS FORM VARIABLES TO THE DATABASE PROCEDURE IN PERSONALIZATION

When I try to use form variable in the database procedure call from personalization I get the attached error.
Under forms personalization
From Actions tab --> builtin --> Execute Procedure when I call a database procedure and pass one of the form variable as parameter I get "ora-01008 couldn't be validate" error
Can we pass on form variables to the database package using personalization ? If yes, then is this the right way?
Message was edited by:
omitchel

I tried customizing the Quoting Form, it works.
What you have done is correct, but this is how you call it
='begin
db_proc('''||${item.qothddet_main.quote_name.value}||''');
end'
here
qothddet_main : block name
quote_name : item name
Thanks
Tapash

How To Save Modified Fields After query From The Database

I Have This Customer Information Form That's Sort of an Ordering Forms , I Made It By LiveCycle v9.0
And I Want To be able to search for Specific Record and Modify it and Save It Again to The DataBase
I believe That We All Saw The (( Data Connected Forms Presentation )) For Pual Guerette
At One Part Of The Presentation (Minute 0:26:00 specifically) When He Try To Search A Specific Record In the Database
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My First Question Is Why ???
Is there anyway After I got that Specific Record I Want from the Database I Can make my modification on it and update it Back in the DB.
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My Second Qustion;
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I Believe that we can Find some scripting to make that Happen
I Will Be So Grateful If There Is Any Helpful Answer
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Hi,
The information there is excellent and I would strongly recommend it.
I don't have any public database examples and I am not inclined to spend time preparing an example if you are not prepared to read up on the methods.
Stefan's site is the only link I have for databases.
Good luck,
Niall

The CFINPUT TYPE=DATEFIELD does not want to accept the date from the database

I got a weird problem which I guess can be just a way to
explain to the server how to interpret the value. I am using
ColdFusion 8 with SQL 2005 Express. In my table, the field is a
DATETIME field and shows the date with time (eg. 2007-07-23
00:00:00).
In my form, when I am adding using the DATEFIELD as the type
for CFINPUT, it records the date correctly. But when I use the
EDIT.cfm form and try to put the value from the database into the
DATEFIELD CFINPUT, the server generate an error. Here is the error:
2007-07-23 00:00:00/0 is an invalid date or time string.
Of course, I tried many things but mostly I tried to force
the format of the date with DATEFORMAT(qGetNewsInfos.dtIssued,
'mm/dd/yyyy') and many more format but without success.
Is anybody know the trick how to use a date into a
<CFINPUT TYPE=DATEFIELD>?

I tried the method like this and still got the same problem:
<cfinput type="datefield" value="#DateFormat(now(),
'mm/dd/yyyy')#">
The system return this error:
08/13/2007 is an invalid date or time string.
I can use this method to record the date of parution of the
News but cannot use it to put a vlue in the CFINPUT? This is not
making any senses!

Notifying a forms client from the database

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