About Socket program in ABAP

Hi all,
Can I do Socket program in ABAP?
I know nothing about that,Can anyone help?
Thanks very much.
Pole

Within ABAP you have access to OLE objects - take a look at ABAB stement SET PROPERTY.
In our production we have some scale weights connected to a PC. On the PC an external vendor has created an OLE obejct that can retur te current state and weight of the scale weight directly into a SAP screen.
I guess if you can write an OLE obejct that can handle it - it is possible.

Similar Messages

TCP/IP socket programming in ABAP

Hi,
Is there any method of TCP socket programming in ABAP? For example is there any function module for creating a socket for a IP address and port number. After that, is it possible to send binary/text data to a connected IP/port destination. I need such a solution because I need to send raw data (native commans) to barcode printer on our network which has a static IP address and listens incoming data through a fixed port number specified in its documentation. For a solution, I coded some .NET VB and built a small application that acts as a RFC server program which can be called by SAP according to definitions I made in SM59 (I defined a new TCP connection and it works well sometimes!). In this application, data coming from SAP are transferred to the barcode printer. This is achived by the .NET Socket class library. This solution works well but after a few subsequent call from SAP, connection hangs! SAP cannot call the application anymore, I test the connection in SM59 and it also hangs, so I need to restart the VB application, but this is unacceptable in our project.
As a result, I decided to code the program that will send data to the printer in ABAP as a function module or subroutine pool, so is there any way to create a socket in ABAP and connect to specific IP/port destination? I searched for possible function modules in SE37 and possible classes in SE24 but unfortunately I could not find one. For example, do know any kind of system function in ABAP (native commands executed by CALL statement), that can be used for this purpose?
I would appreciate any help,
Kind regards,
Tolga
Edited by: Tolga Togan Duz on Dec 17, 2007 11:49 PM

Hi,
I doubt that there is a low level API for sockets in ABAP. There is API for HTTP but probably that won't help you. As a workaround you can use external OS commands (transactions SM69 and SM49). For example on Unix you can use netcat to transfer file. Your FM needs to dump data into folder and then call netcat to transfer file.
Cheers

Socket programming usin nio package

hello frens i m new to socket programming
i come to know that nio packaage provides more sophisticated and efficient API to deal with socket programming issue
I need to know where i can get tutorial about socket programming using nio pacakage

Try google
http://www.google.co.uk/search?q=java+nio+tutorial

Links / Books for Socket Programming

HI Guys,
Can any of you provide me some links or information on books about Socket Programming in Java. I have to deal with programming involving the client side to be in Java and the server which is in C. The topics which should be focused on are :
1. Packet formation
2. Packet parsing
Thanks
--J

There is a great book by a guy Elliotte Rusty Harold....I think it's called "Java Network Programming"
Yeah here is the link to his website:
http://www.elharo.com/

I need information about oops concept programming in abap

Hi ,
I need information about oops concept programming in abap
Thanks,
Asha

Of course, the best place to start is help.sap.com.
http://help.sap.com/saphelp_nw2004s/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
There are a couple good books out there as well. You can get them at www.amazon.com
Regards,
Rich Heilman

Where can I find everything about sockets?

hi,
i want to know everything about sockets (TCP), above all about all possible exceptions and when they are thrown. Until now, I can programm a normal chat programm. But sometimes I got problems with the sockets and then I solve them and I dont really know why. For example, it looks for me that if an outputstream of a socket is closed, the socket itself is closed. Well, I just need more infos about sockets, their streams, and exceptions (or maybe a good FAQ).
thanx

MmM you open them you close them and the rest is history.You use maltithreads with them but that depends on what you are doing.Also you might want to check out orb (Object request brokers) if you are wanting to do high level of network programming that deals with alot of clients.
Also look into OMG (Object Manaement Group)and cobra
Just a few thoughts if you are intrested in network programming.I take it you are since you are wanting to know all you can about sockets.
Good luck

Unable to open any programs in ABAP editor

Hi folks i'm unable to open any programs in ABAP Editor.
When ever i try to open any program it goes to short dump.
Even when i try to open STO4 to view error log.
it shows following message
Short text
    Runtime error, short dump could not be written.
What happened?
    Error in the ABAP Application Program
    The current ABAP program " " had to be terminated because it has
    come across a statement that unfortunately cannot be executed.
    Unfortunately, the system cannot carry out a detailed analysis of the
    error, as the table SNAP (which gathers information at the time of
    termination) does not contain a suitable short dump.
Information About Termination Point in XSLT Prog.
    Termination occurred in the XSLT program " ".
    The call took place using CALL TRANSFORMATION from the ABAP
    program specified below.
    In the source code, the termination point is in line " "
    of the (Include) program " ".
Internal notes
    The termination was triggered in function " "
    of the SAP kernel, in line " " of the module " ".
    The internal operation just processed is " ".
    Internal mode was started at " ".

hi,
check whether any exit has been implemented for se38 and because of some statements in that it may goto dump.
also try to open ur program from SE80.if u have access to se80 then u can do it from there itself.
reward points if hlpful.

Network and socket programming in python

i want to learn network and socket programming but i would like to do this in python.Reason behind this is that python is very simple and the only language i know .
anybody can suggest me which book should i pick.
the book should have following specification--
1)not tedious to follow
2)lots of example
3)starts with some networking stuff and then get into codes
thanks in advance with regards.

hmm. well, your requirements are almost contradictory.
Not sure about books, except maybe dusty's.
Most python books cover at least some network programming (unless the book is topic specific).
I use lots of python-twisted at work. I mean ALOT. I wouldn't recommend it to someone looking for non-tedious though! I also like gevent/eventlet (esp. the async socket wrappers).
EDIT: Wow. My post wasn't really helpful at all. Sorry!
Last edited by cactus (2010-09-04 09:16:54)

Socket Programing in J2ME - Confused with Sun Sample Code

Hai Everybody,
I have confused with sample code provided by Sun Inc , for the demo of socket programming in J2ME. I found the code in the API specification of J2ME. The code look like :-
// Create the server listening socket for port 1234
ServerSocketConnection scn =(ServerSocketConnection) Connector.open("socket://:1234");
where Connector.open() method return an interface Connection which is the base interface of ServerSocketConnection. I have confused with this line , is it is possible to cast base class object to the derived class object?
Plese help me in this regards
Thanks in advance
Sulfikkar

There is nothing to be confused about. The Connector factory creates an implementation of one of the extentions of the Connection interface and returns it.
For a serversocket "socket://<port>" it will return an implementation of the ServerSocketConnection interface. You don't need to know what the implementation looks like. You'll only need to cast the Connection to a ServerSocketConnection .

Information about UK payroll in ABAP HR

1)Can anyone share some information about UK payroll in ABAP HR especially INCLUDES that need to be used while getting payroll results from clusters.
2)Interface programs in ABAP-HR.

Can be helpful for the Report generation like salary register and reconcile of payroll for certain periods by accessing tables, RT, CRT& LRT.
all the best

RESTFUL Web Services vs Socket Programming Performance

Hi guys,
I will have an application which will have a service serving about to 30 million users/day and a mean of 5 requests/user.
It means that there will be about 150 million requests per day. I will have two servers behind a load balancer and my clients will be both Java and C++.
I think to implement RESTFUL Web Services but afraid of performance issues.
Did you have a knowledge about the performances of web service and socket programming in such a high loaded project?
Tnx.
Ayberk

ayberkcansever wrote:
Hi guys,
I will have an application which will have a service serving about to 30 million users/day and a mean of 5 requests/user.
It means that there will be about 150 million requests per day. I will have two servers behind a load balancer and my clients will be both Java and C++.
I think to implement RESTFUL Web Services but afraid of performance issues.
Did you have a knowledge about the performances of web service and socket programming in such a high loaded project?It depends on the CPUs, RAM, disks, and network configurations of those servers.
It depends on how the requests are distributed throughout the day.
It depends on how big the requests are and how big the responses are.

First Very Simple Socket Program

Hello,
I am learning about Sockets and ServerSockets and how I can use the. I am trying to make the simplest server/client program possible just for my understanding before I go deper into it. I have written two programs. theserver.java and theclient.java the sere code looks like this....
import java.net.*;
import java.io.*;
import java.util.*;
public class theserver
public static void main(String[] args)
{   // IOReader r = new IOReader();
        int prt = 3333;
        BufferedReader in;
         PrintWriter out;
        ServerSocket serverSocket;
        Socket clientSocket = null;
try{
serverSocket = new ServerSocket(prt); // creates the socket looking on prt (3333)
System.out.println("The Server is now running...");
while(true)
    clientSocket = serverSocket.accept(); // accepts the connenction
    clientSocket.getKeepAlive(); // keeps the connection alive
    out = new PrintWriter(clientSocket.getOutputStream(),true);
    in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
     if(in.ready())
     System.out.println(in.readLine()); // print it
catch (IOException e) {
    System.out.println("Accept failed:"+prt);
}and the client looks like this
import java.net.*;
import java.io.*;
public class theclient
public static void main(String[] args)
    BufferedReader in;
    PrintWriter out;
    IOReader r = new IOReader();
    PrintWriter sender;
    Socket sock;
try{
    sock = new Socket("linuxcomp",3333); // creates a new connection with the server.
    sock.setKeepAlive(true); // keeps the connection alive
    System.out.println("Socket is connected"); // confirms socket is connected.
    System.out.println("Please enter a String");
     String bob = r.readS();
      out = new PrintWriter(sock.getOutputStream(),true);
    out.print(bob); // write bob to the server
catch(IOException e)
       System.out.println("The socket is now disconnected..");
}If you notice in the code I use a class I made called IOReader. All that class is, is a buffered reader for my System.in. (just makes it easier for me)
Ok now for my question:
When I run this program I run the server first then the client. I type "hello" into my system.in but on my server side, it prints "null" I can't figure out what I am doing wrong, if I am not converting correctly, or if the message is not ever being sent. I tried putting a while(in.read()) { System.out.println("whatever") } it never reaches a point where in.ready() == true. Kinda of agrivating. Because I am very new to sockets, I wanna aks if there is somthing wrong with my code, or if I am going about this process completely wrong. Thank you to how ever helps me,
Cobbweb

An example of Creating a Client Socket (Java socket programming tutorial)
try {
        InetAddress addr = InetAddress.getByName("hotdir.biz");
        int port = 80;
        // This constructor will block until the connection succeeds
        Socket socket = new Socket(addr, port);
    } catch (UnknownHostException e) {
    } catch (IOException e) {
    // Create a socket with a timeout
    try {
        InetAddress addr = InetAddress.getByName("hotdir.biz");
        int port = 80;
        SocketAddress sockaddr = new InetSocketAddress(addr, port);
        // Create an unbound socket
        Socket sock = new Socket();
        // This method will block no more than timeoutMs.
        // If the timeout occurs, SocketTimeoutException is thrown.
        int timeoutMs = 2000;   // 2 seconds
        sock.connect(sockaddr, timeoutMs);
    } catch (UnknownHostException e) {
    } catch (SocketTimeoutException e) {
    } catch (IOException e) {
    }See socket tutorial here http://www.developerzone.biz/index.php?option=com_content&task=view&id=94&Itemid=36

Socket Programming Problem

I am using multi threading with socket programming. One thread uses socket's output stream to send the data and the other thread keeps waiting for the data to arrive from that socket's input stream.
Now when the readLine or readObject is excuting on the receiver thread it will be blocked untill data arrives. In which case sending thread will not be able to send the data.
Now is there any way to make the readLine or readObject method non blocking?
Please advise ASAP
thnks

Below is an example of a simple blocking multi-threaded client program that connects to google. I don't believe I've ever experienced a problem like you're describing before while dealing with Java sockets; perhaps this will give you an idea about what's going wrong. One thread reads from stdin, the other (the main-thread of execution) reads from the socket and writes to the screen.
java Test
Then do a GET request to the HTTP server:
"GET / HTTP/1.0"
Then press return again and watch it send you google's root page.
import java.net.*;
import java.io.*;
class Test
    Test()
     try
          Socket mySocket = new Socket("www.google.com", 80);
          BufferedReader myReader;
          final BufferedWriter myWriter;
          myWriter = new BufferedWriter(new OutputStreamWriter(mySocket.getOutputStream()));
          Thread myThread = new Thread()
               public void run()
                   System.out.println("here");
                   try
                   BufferedReader inputReader = new BufferedReader(new InputStreamReader(System.in));
                   String str;
                   while((str = inputReader.readLine()) != null)
                        myWriter.write(str);
                        myWriter.write("\n");
                        myWriter.flush();
                   catch(IOException e)
                    System.err.println("Error reading from stdin.");
                    System.exit(-1);
          myThread.start();
                   System.out.println("there");
          myReader = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
          String str;
          while((str = myReader.readLine()) != null)
               System.out.println(str);
     catch(IOException hostExcep)
          System.out.println("Host terminated the connection!");
          hostExcep.printStackTrace();
    public static void main(String args[])
     new Test();
}

Connect Java programs to ABAP generated Web Services

Hi everybody again!
This time I write looking for code examples about connecting my java programs in Netweaver to Abap generated web services.
Could anyone send me any example, please?
Thanks in advance again!
Alberto.

Hi,
I'm also looking for code examples about connecting Java programs to ABAP generated Webservices... could you, please, send it to me ?
actually, I need to call bapi from a java Web site.
(as an SOAP request ...)
is it better to <b>generate webser</b>vices from the Bapi then call it,
Or shall i keep the Bapi, and call it from a java webservices based on <b>JCO/RFC</b> calls ...
what's more efficient ?
java webservices + Jco calls to the bapi ?
or direct calls to generated abap webservices ?
thanks
saber

Example programs on abap object events?

Hi Experts,
I need some example programs on abap object events.
regards,
vijay

Hi,
go thru the below program. hope it could help you.
   REPORT sapmz_hf_alv_grid .
Type pool for icons - used in the toolbar
   TYPE-POOLS: icon.
   TABLES: zsflight.
To allow the declaration of o_event_receiver before the
lcl_event_receiver class is defined, decale it as deferred in the
start of the program
   CLASS lcl_event_receiver DEFINITION DEFERRED.
G L O B A L   I N T E R N A L   T A B L E S
   *DATA: gi_sflight TYPE STANDARD TABLE OF sflight.
To include a traffic light and/or color a line the structure of the
table must include fields for the traffic light and/or the color
   TYPES: BEGIN OF st_sflight.
           INCLUDE STRUCTURE zsflight.
      Field for traffic light
   TYPES: traffic_light TYPE c.
      Field for line color
   types: line_color(4) type c.
   TYPES: END OF st_sflight.
   TYPES: tt_sflight TYPE STANDARD TABLE OF st_sflight.
   DATA: gi_sflight TYPE tt_sflight.
G L O B A L   D A T A
   DATA: ok_code         LIKE sy-ucomm,
    Work area for internal table
         g_wa_sflight    TYPE st_sflight,
    ALV control: Layout structure
         gs_layout       TYPE lvc_s_layo.
Declare reference variables to the ALV grid and the container
   DATA:
     go_grid             TYPE REF TO cl_gui_alv_grid,
     go_custom_container TYPE REF TO cl_gui_custom_container,
     o_event_receiver    TYPE REF TO lcl_event_receiver.
   DATA:
Work area for screen 200
     g_screen200 LIKE zsflight.
Data for storing information about selected rows in the grid
   DATA:
Internal table
     gi_index_rows TYPE lvc_t_row,
Information about 1 row
     g_selected_row LIKE lvc_s_row.
C L A S S E S
   CLASS lcl_event_receiver DEFINITION.
     PUBLIC SECTION.
       METHODS:
        handle_toolbar FOR EVENT toolbar OF cl_gui_alv_grid
          IMPORTING
            e_object e_interactive,
        handle_user_command FOR EVENT user_command OF cl_gui_alv_grid
          IMPORTING e_ucomm.
   ENDCLASS.
      CLASS lcl_event_receiver IMPLEMENTATION
   CLASS lcl_event_receiver IMPLEMENTATION.
     METHOD handle_toolbar.
Event handler method for event toolbar.
       CONSTANTS:
Constants for button type
         c_button_normal           TYPE i VALUE 0,
         c_menu_and_default_button TYPE i VALUE 1,
         c_menu                    TYPE i VALUE 2,
         c_separator               TYPE i VALUE 3,
         c_radio_button            TYPE i VALUE 4,
         c_checkbox                TYPE i VALUE 5,
         c_menu_entry              TYPE i VALUE 6.
       DATA:
           ls_toolbar TYPE stb_button.
Append seperator to the normal toolbar
       CLEAR ls_toolbar.
       MOVE c_separator TO ls_toolbar-butn_type..
       APPEND ls_toolbar TO e_object->mt_toolbar.
Append a new button that to the toolbar. Use E_OBJECT of
event toolbar. E_OBJECT is of type CL_ALV_EVENT_TOOLBAR_SET.
This class has one attribute MT_TOOLBAR which is of table type
TTB_BUTTON. The structure is STB_BUTTON
       CLEAR ls_toolbar.
       MOVE 'CHANGE'        TO ls_toolbar-function.
       MOVE icon_change    TO ls_toolbar-icon.
       MOVE 'Change flight' TO ls_toolbar-quickinfo.
       MOVE 'Change'        TO ls_toolbar-text.
       MOVE ' '             TO ls_toolbar-disabled.
       APPEND ls_toolbar    TO e_object->mt_toolbar.
     ENDMETHOD.
     METHOD handle_user_command.
Handle own functions defined in the toolbar
       CASE e_ucomm.
         WHEN 'CHANGE'.
           PERFORM change_flight.
       LEAVE TO SCREEN 0.
       ENDCASE.
     ENDMETHOD.
   ENDCLASS.
S T A R T - O F - S E L E C T I O N.
   START-OF-SELECTION.
     SET SCREEN '100'.
   *&      Module USER_COMMAND_0100 INPUT
   MODULE user_command_0100 INPUT.
     CASE ok_code.
       WHEN 'EXIT'.
         LEAVE TO SCREEN 0.
     ENDCASE.
   ENDMODULE.                 " USER_COMMAND_0100 INPUT
   *&      Module STATUS_0100 OUTPUT
   MODULE status_0100 OUTPUT.
     DATA:
For parameter IS_VARIANT that is sued to set up options for storing
the grid layout as a variant in method set_table_for_first_display
       l_layout TYPE disvariant,
Utillity field
       l_lines TYPE i.
After returning from screen 200 the line that was selected before
going to screen 200, should be selected again. The table gi_index_rows
was the output table from the GET_SELECTED_ROWS method in form
CHANGE_FLIGHT
     DESCRIBE TABLE gi_index_rows LINES l_lines.
     IF l_lines > 0.
       CALL METHOD go_grid->set_selected_rows
           EXPORTING
             it_index_rows = gi_index_rows.
       CALL METHOD cl_gui_cfw=>flush.
       REFRESH gi_index_rows.
     ENDIF.
Read data and create objects
     IF go_custom_container IS INITIAL.
Read data from datbase table
       PERFORM get_data.
Create objects for container and ALV grid
       CREATE OBJECT go_custom_container
         EXPORTING container_name = 'ALV_CONTAINER'.
       CREATE OBJECT go_grid
         EXPORTING
           i_parent = go_custom_container.
Create object for event_receiver class
and set handlers
       CREATE OBJECT o_event_receiver.
       SET HANDLER o_event_receiver->handle_user_command FOR go_grid.
       SET HANDLER o_event_receiver->handle_toolbar FOR go_grid.
Layout (Variant) for ALV grid
       l_layout-report = sy-repid. "Layout fo report
Setup the grid layout using a variable of structure lvc_s_layo
Set grid title
       gs_layout-grid_title = 'Flights'.
Selection mode - Single row without buttons
(This is the default mode
       gs_layout-sel_mode = 'B'.
Name of the exception field (Traffic light field) and the color
field + set the exception and color field of the table
       gs_layout-excp_fname = 'TRAFFIC_LIGHT'.
       gs_layout-info_fname = 'LINE_COLOR'.
       LOOP AT gi_sflight INTO g_wa_sflight.
         IF g_wa_sflight-paymentsum < 100000.
      Value of traffic light field
           g_wa_sflight-traffic_light = '1'.
      Value of color field:
      C = Color, 6=Color 1=Intesified on, 0: Inverse display off
           g_wa_sflight-line_color    = 'C610'.
         ELSEIF g_wa_sflight-paymentsum => 100000 AND
                g_wa_sflight-paymentsum < 1000000.
           g_wa_sflight-traffic_light = '2'.
         ELSE.
           g_wa_sflight-traffic_light = '3'.
         ENDIF.
         MODIFY gi_sflight FROM g_wa_sflight.
       ENDLOOP.
Grid setup for first display
       CALL METHOD go_grid->set_table_for_first_display
         EXPORTING i_structure_name = 'SFLIGHT'
                   is_variant       = l_layout
                   i_save           = 'A'
                   is_layout        = gs_layout
         CHANGING it_outtab        = gi_sflight.
   *-- End of grid setup -
Raise event toolbar to show the modified toolbar
       CALL METHOD go_grid->set_toolbar_interactive.
Set focus to the grid. This is not necessary in this
example as there is only one control on the screen
       CALL METHOD cl_gui_control=>set_focus EXPORTING control = go_grid.
     ENDIF.
   ENDMODULE.                 " STATUS_0100 OUTPUT
   *&      Module USER_COMMAND_0200 INPUT
   MODULE user_command_0200 INPUT.
     CASE ok_code.
       WHEN 'EXIT200'.
         LEAVE TO SCREEN 100.
         WHEN'SAVE'.
         PERFORM save_changes.
     ENDCASE.
   ENDMODULE.                 " USER_COMMAND_0200 INPUT
   *&      Form get_data
   FORM get_data.
Read data from table SFLIGHT
     SELECT *
       FROM zsflight
       INTO TABLE gi_sflight.
   ENDFORM.                    " load_data_into_grid
   *&      Form change_flight
Reads the contents of the selected row in the grid, ans transfers
the data to screen 200, where it can be changed and saved.
   FORM change_flight.
     DATA:l_lines TYPE i.
     REFRESH gi_index_rows.
     CLEAR   g_selected_row.
Read index of selected rows
     CALL METHOD go_grid->get_selected_rows
       IMPORTING
         et_index_rows = gi_index_rows.
Check if any row are selected at all. If not
table gi_index_rows will be empty
     DESCRIBE TABLE gi_index_rows LINES l_lines.
     IF l_lines = 0.
       CALL FUNCTION 'POPUP_TO_DISPLAY_TEXT'
            EXPORTING
                 textline1 = 'You must choose a line'.
       EXIT.
     ENDIF.
Read indexes of selected rows. In this example only one
row can be selected as we are using gs_layout-sel_mode = 'B',
so it is only ncessary to read the first entry in
table gi_index_rows
     LOOP AT gi_index_rows INTO g_selected_row.
       IF sy-tabix = 1.
        READ TABLE gi_sflight INDEX g_selected_row-index INTO g_wa_sflight.
       ENDIF.
     ENDLOOP.
Transfer data from the selected row to screenm 200 and show
screen 200
     CLEAR g_screen200.
     MOVE-CORRESPONDING g_wa_sflight TO g_screen200.
     LEAVE TO SCREEN '200'.
   ENDFORM.                    " change_flight
   *&      Form save_changes
Changes made in screen 200 are written to the datbase table
zsflight, and to the grid table gi_sflight, and the grid is
updated with method refresh_table_display to display the changes
   FORM save_changes.
     DATA: l_traffic_light TYPE c.
Update traffic light field
Update database table
     MODIFY zsflight FROM g_screen200.
Update grid table , traffic light field and color field.
Note that it is necessary to use structure g_wa_sflight
for the update, as the screen structure does not have a
traffic light field
     MOVE-CORRESPONDING g_screen200 TO g_wa_sflight.
     IF g_wa_sflight-paymentsum < 100000.
       g_wa_sflight-traffic_light = '1'.
C = Color, 6=Color 1=Intesified on, 0: Inverse display off
       g_wa_sflight-line_color    = 'C610'.
     ELSEIF g_wa_sflight-paymentsum => 100000 AND
            g_wa_sflight-paymentsum < 1000000.
       g_wa_sflight-traffic_light = '2'.
       clear g_wa_sflight-line_color.
     ELSE.
       g_wa_sflight-traffic_light = '3'.
       clear g_wa_sflight-line_color.
     ENDIF.
     MODIFY gi_sflight INDEX g_selected_row-index FROM g_wa_sflight.
Refresh grid
     CALL METHOD go_grid->refresh_table_display.
     CALL METHOD cl_gui_cfw=>flush.
     LEAVE TO SCREEN '100'.
   ENDFORM.                    " save_changes
regards
-Rakesh

About Socket program in ABAP

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