What's the actual function of resource-ref in web.xml

I was configuring JNDI datasource in tomcat and found an confusing fact.
If I have the JNDI resource configuration in the context configuration of the project, I could get access to the JNDI element with or without the resource-ref configuration in my web.xml.
Can someone tell me what exactly resource-ref does in the web application?
Thank you.

Thank you, Sunny.
But I still don't quite understand.
In Tomcat, this <resource-ref> seems to be optional, right?
Plus, there should be a virtual name and actual location in the configuration.
<resource-ref>
<description>Resource reference to a factory for java.sql.Connection.</description>
<res-ref-name>jdbc/mydb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
So, is "jdbc/mydb" the virtual name or the actual location of the resource?

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           <res-auth>Container</res-auth>
     </resource-ref>inside web.xml , it works with or without , please tell me the importance of this

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http://www.chariotsolutions.com/geronimo/geronimo-1.1/database-mapping.html

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Hi,
You can refer this link
http://www.whizlabs.com/tutorial/scwcd/j-scwcd-7-5.html
give the complete description of your doubt
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what is the actual size occupied by an (empty) varray in a record?
For example, if I create my table defined as:
create or replace type XXX as object (
myRefs VARRAY(10) of REF(yyy)
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Hi,
The target field mapping is possible by using below typs of functions
1. Standard functions
2. Runtime procedure
3. User Defined functions
Standard functions are the APIs provided in Graphical mapping to process the values of the fields used for target field mapping.
Technically all these values are trated as string thus all standard functions expect strings as input argument and string as an export aurgument
Please find here with you more details about it at below link
http://help.sap.com/saphelp_nw04/helpdata/en/43/c4cdfc334824478090739c04c4a249/frameset.htm
2. Runtime procedure
http://help.sap.com/saphelp_nw04/helpdata/en/3d/24e15bf9d79243b45d49b13b03de8f/content.htm
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I just noticed you said "one software company". There are other options if you want to be a "partner". It is one thing to use the software to run your company, it is another if you want the software because your company wants to develop add-ons.
Message was edited by: Norman Salter

What are the different functions used in sap script?

Hi,
What are the different functions used in sap script? What are the parameters used in each Function?
Regards,
Mahesh

he print program is used to print forms. The program retieves the necesary data from datbase tables, defines the order of in which text elements are printed, chooses a form for printing and selects an output device and print options.
Function modules in a printprogram:
When you print a form you must used the staments OPEN_FORM and CLOSE_FORM. To combine forms into a single spool request use START_FORM and END_FORM.
To print textelements in a form use WRITE_FORM. The order in which the textelements are printed, is determined by the order of the WRITE_FORM statements. Note: for printing lines in the body, you can also use the WRITE_FORM_LINES function module.
To transfer control command to a form use CONTROL_FORM.
Structure of a print program
Read data
Tables: xxx.
SELECT *
FROM xxx.
Open form printing - Must be called before working with any of the other form function modules.
Must be ended with function module CLOSE FORM
call function 'OPEN_FORM'.....
To begin several indentical forms containing different data within a single spool request, begin each form using START_FORM, and end it using END_FORM
call funtion 'START_FORM'.....
Write text elements to a window of the form
call function 'WRITE_FORM'.....
Ends spool request started with START_FORM
call funtion 'END_FORM'.....
Closes form printing
call function 'CLOSE_FORM'...
OPEN_FORM function
Syntax:
CALL FUNCTION 'OPEN_FORM'
EXPORTING
APPLICATION                       = 'TX'
ARCHIVE_INDEX                     =
ARCHIVE_PARAMS                    =
DEVICE                            = 'PRINTER'
DIALOG                            = 'X'
FORM                              = ' '
LANGUAGE                          = SY-LANGU
OPTIONS                           =
MAIL_SENDER                       =
MAIL_RECIPIENT                    =
MAIL_APPL_OBJECT                  =
RAW_DATA_INTERFACE                = '*'
IMPORTING
LANGUAGE                          =
NEW_ARCHIVE_PARAMS                =
RESULT                            =
EXCEPTIONS
CANCELED                          = 1
DEVICE                            = 2
FORM                              = 3
OPTIONS                           = 4
UNCLOSED                          = 5
MAIL_OPTIONS                      = 6
ARCHIVE_ERROR                     = 7
INVALID_FAX_NUMBER                = 8
MORE_PARAMS_NEEDED_IN_BATCH       = 9
SPOOL_ERROR                       = 10
OTHERS                            = 11
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Some important parameters:
FORM      Name of the form
DEVICE
PRINTER : Print output using spool
TELEFAX: Fax output
SCREEN: Output to screen
OPTIONS      Used to control attrubutes for printing or faxing (Number of copies, immediate output....
The input for the parameter is structure ITCPO.
CLOSE_FORM function
CALL FUNCTION 'CLOSE_FORM'
IMPORTING
RESULT                         =
RDI_RESULT                     =
TABLES
OTFDATA                        =
EXCEPTIONS
UNOPENED                       = 1
BAD_PAGEFORMAT_FOR_PRINT       = 2
SEND_ERROR                     = 3
SPOOL_ERROR                    = 4
OTHERS                         = 5
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Paramerters:
RESULT      Returns status information and print/fax parameters after the form has been printed. RESULT is of structure ITCPP.
WRITE_FORM function
CALL FUNCTION 'WRITE_FORM'
EXPORTING
ELEMENT                        = ' '
FUNCTION                       = 'SET'
TYPE                           = 'BODY'
WINDOW                         = 'MAIN'
IMPORTING
PENDING_LINES                  =
EXCEPTIONS
ELEMENT                        = 1
FUNCTION                       = 2
TYPE                           = 3
UNOPENED                       = 4
UNSTARTED                      = 5
WINDOW                         = 6
BAD_PAGEFORMAT_FOR_PRINT       = 7
SPOOL_ERROR                    = 8
OTHERS                         = 9
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Some important parameters:
ELEMENT      Specifies which textelement is printed
WINDOW      Specifies which window is printed
TYPE      Specifies the output area of the main window. This can be:
TOP - Used for headers
BODY
BOTTOM - Used for footers
FUNCTION      Specifies whether text is to be appended, replaced or added
Example of how to use the WRITE_FORM function module together with a script.
Form layout of the MAIN window
/E INTRODUCTION
Dear Customer
/E ITEM_HEADER
IH Carrier, Departure
/E ITEM_LINE
IL &SBOOK-CARRID&, &SPFLI-DEPTIME&
/E CLOSING_REMARK
The print program
Writing INTRODUCTION
CALL FUNCTION 'WRITE_FORM'
     EXPORTING
          ELEMENT                  = 'INTRODUCTION'
          FUNCTION                 = 'SET'
          TYPE                     = 'BODY'
          WINDOW                   = 'MAIN'
    EXCEPTIONS
         OTHERS                   = 8
Writing ITEM_HEADER
CALL FUNCTION 'WRITE_FORM'
     EXPORTING
          ELEMENT                  = 'ITEM_HEADER'
          FUNCTION                 = 'SET'
          TYPE                     = 'BODY'
          WINDOW                   = 'MAIN'
    EXCEPTIONS
         OTHERS                   = 8
Set ITEM_HEADER into TOP area of main window for subsequent pages
CALL FUNCTION 'WRITE_FORM'
     EXPORTING
          ELEMENT                  = 'ITEM_HEADER'
          FUNCTION                 = 'SET'
          TYPE                     = 'TOP'
          WINDOW                   = 'MAIN'
    EXCEPTIONS
         OTHERS                   = 8
Write ITEM_LINE
LOOP AT .....
   CALL FUNCTION 'WRITE_FORM'
        EXPORTING
             ELEMENT               = 'ITEM_LINE'
             FUNCTION              = 'SET'
             TYPE                  = 'BODY'
             WINDOW                = 'MAIN'
       EXCEPTIONS
            OTHERS                 = 8.
ENDLOOP.
Delete ITEM_HEADER from TOP area of main window
CALL FUNCTION 'WRITE_FORM'
     EXPORTING
          ELEMENT                  = 'ITEM_HEADER'
          FUNCTION                 = 'DELETE'
          TYPE                     = 'TOP'
          WINDOW                   = 'MAIN'
    EXCEPTIONS
         OTHERS                    = 8
Print CLOSING_REMARK
CALL FUNCTION 'WRITE_FORM'
     EXPORTING
          ELEMENT                  = 'CLOSING_REMARK'
          FUNCTION                 = 'SET'
          TYPE                          = 'BODY'
          WINDOW                   = 'MAIN'
    EXCEPTIONS
         OTHERS                    = 8
START_FORM function
CALL FUNCTION 'START_FORM'
EXPORTING
ARCHIVE_INDEX          =
FORM                   = ' '
LANGUAGE               = ' '
STARTPAGE              = ' '
PROGRAM                = ' '
MAIL_APPL_OBJECT       =
IMPORTING
LANGUAGE               =
EXCEPTIONS
FORM                   = 1
FORMAT                 = 2
UNENDED                = 3
UNOPENED               = 4
UNUSED                 = 5
SPOOL_ERROR            = 6
OTHERS                 = 7
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
END_FORM function
CALL FUNCTION 'END_FORM'
IMPORTING
RESULT                         =
EXCEPTIONS
UNOPENED                       = 1
BAD_PAGEFORMAT_FOR_PRINT       = 2
SPOOL_ERROR                    = 3
OTHERS                         = 4
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
CONTROL_FORM function
The CONTROL_FORM function module alows you to create SapScript control statements from within an APAB program.
Syntax:
CALL FUNCTION 'CONTROL_FORM'
EXPORTING
    command         =
EXCEPTIONS
UNOPENED        = 1
UNSTARTED       = 2
OTHERS          = 3
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Example:
Protecting the text element ITEM_LINE
CALL FUNCTION 'CONTROL_FORM'
EXPORTING
    COMMAND = 'PROTECT'.
CALL FUNCTION 'WRITE_FORM'
EXPORTING
    TEXELEMENT = 'ITEM_LINE'.
CALL FUNCTION 'CONTROL_FORM'
EXPORTING
    COMMAND = 'ENDPROTECT'.

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https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/7e58e690-0201-0010-fd85-a2f29a41c7af

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Hi Friends what are the actual differences between AT NEW & ON CHANGE

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Hi,
At New
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and
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REWARD IF HELPFUL
RAAM

What's the actual function of resource-ref in web.xml

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