Problem in WS_DELIVERY_UPDATE_2 ?
Hi All,
I am using BAPI , WS_DELIVERY_UPDATE_2 to update VL02N. I developed one application using that i am updating.
For Ex : One delivery contains 2 materials, 1 and 2 are the respective delivery quantities. If i select both materials and i give 1 and 2 as pick quantity, it is executing fine and updating delivery correctly.
case 1 : suppose, if i give pick qty 1 for first item and for sec item also 1, it is updating 2nd item pick qty only ( i.e., 1 ).
case 2 : If i select both items and give pick qty as 1 for 1st item 2nd item, it is updating 2nd item only ( i.e. 1 ).
My questing is, suppose for one item i may pick 1 qty at one time and 1 qty at next time, so toal pick qty is 2. how can i update this??? any ideas?
Thanks,
Venkat
Hi Venkat,
Try another FM 'SD_DELIVERY_UPDATE_PICKING'. I have used this for picking.
Sample code:-
1) Routine-3
IF i_vbpok IS NOT INITIAL.
CALL FUNCTION 'SD_DELIVERY_UPDATE_PICKING'
EXPORTING
vbkok_wa = wa_vbkok
nicht_sperren = c_y
aufrufer_t = c_x
synchron = c_x
NO_MESSAGES_UPDATE = ' '
if_error_messages_send = space
TABLES
vbpok_tab = i_vbpok
prot = i_prot
IF i_prot[] IS NOT INITIAL. "error
SORT i_prot BY msgty.
CLEAR wa_prot.
READ TABLE i_prot INTO wa_prot WITH KEY msgty = c_e BINARY SEARCH. "Checking error message
IF sy-subrc <> 0.
wa_final-remarks = text-004.
wa_final-pick = 'P'.
ELSE.
wa_final-pick = 'F'.
CLEAR ws_sapmessage.
CALL FUNCTION 'MESSAGE_TEXT_BUILD'
EXPORTING
msgid = wa_prot-msgid "Messg class
msgnr = wa_prot-msgno "Messg No.
msgv1 = wa_prot-msgv1
msgv2 = wa_prot-msgv2
msgv3 = wa_prot-msgv3
msgv4 = wa_prot-msgv4
IMPORTING
message_text_output = ws_sapmessage.
CONCATENATE text-006 ws_sapmessage INTO wa_final-remarks.
ENDIF.
**routine-2 :-
FORM f0003_fill_vbpok .
wa_vbkok-vbeln_vl = wa_vblkk-vbeln. "delivery number
wa_vbkok-vbeln = wa_vblkk-komau. "Pick order number
SORT i_lips BY vbeln posnr.
LOOP AT i_vblkp ASSIGNING <fs_vblkp>.
wa_vbpok-vbeln_vl = <fs_vblkp>-vbeln.
wa_vbpok-posnr_vl = <fs_vblkp>-posnr.
wa_vbpok-vbtyp_n = c_j . "-delivery "'Q' - WMS
wa_vbpok-pikmg = <fs_vblkp>-lfimg. "picking quantity.
wa_vbpok-plmin = c_0.
wa_vbpok-lfimg_flo = <fs_vblkp>-lfimg.
wa_vbpok-ndifm = 0.
wa_vbpok-taqui = space.
IF <fs_vblkp>-posnr > c_posnr AND NOT <fs_vblkp>-uecha IS INITIAL.
wa_vbpok-taqui = c_x.
ENDIF.
wa_vbpok-charg = <fs_vblkp>-charg.
CLEAR wa_lips.
READ TABLE i_lips INTO wa_lips WITH KEY vbeln = <fs_vblkp>-vbeln posnr = <fs_vblkp>-posnr BINARY SEARCH.
IF sy-subrc = 0.
wa_vbkok-vbeln = wa_lips-vgbel.
wa_vbpok-vbeln = wa_lips-vgbel.
wa_vbpok-posnn = wa_lips-vgpos.
wa_vbpok-werks = wa_lips-werks.
ENDIF.
wa_vbpok-matnr = <fs_vblkp>-matnr.
wa_vbpok-brgew = <fs_vblkp>-brgew.
wa_vbpok-gewei = <fs_vblkp>-gewei.
wa_vbpok-volum = <fs_vblkp>-volum.
wa_vbpok-voleh = <fs_vblkp>-voleh.
wa_vbpok-orpos = 0.
APPEND wa_vbpok TO i_vbpok.
ENDLOOP.
ENDFORM.
**routine-1
FORM f0002_get_picking .
CALL FUNCTION 'RV_DELIVERY_PICK_VIEW'"Get LIPS table
EXPORTING
vbeln = ws_c_vbeln
zweck = c_d
IMPORTING
vblkk_wa = wa_vblkk
TABLES
vblkp_tab = i_vblkp
lips_tab = i_lips
EXCEPTIONS
no_likp = 1
no_picking_allowed = 2
hu_error = 3
OTHERS = 4.
IF sy-subrc <> 0.
REFRESH i_lips[].
ELSE.
PERFORM f0009_commit.
ENDIF.
ENDFORM.
Similar Messages
-
Problem while using WS_DELIVERY_UPDATE_2
Hi All
I am using WS_DELIVERY_UPDATE_2 to update delivery qty and pick quantity. but there is no result, and no error. did i miss anything?
call function 'WS_DELIVERY_UPDATE_2'
exporting
vbkok_wa = wa_vbkok
delivery = p_vbeln
update_picking = 'X'
no_messages_update = 'X'
synchron = 'X'
commit = 'X'
nicht_sperren = 'x'
if_database_update = '1'
if_error_messages_send = 'x'
importing
ef_error_any = z_error_any
ef_error_in_item_deletion = z_deletion_error
ef_error_in_pod_update = z_pod_error
ef_error_in_interface = z_interface_error
ef_error_in_goods_issue = z_pgi_error
ef_error_in_final_check = z_final_error
tables
vbpok_tab = i_vbpok
prot = i_prot.
Thanks,
Venkat.Hi Renu
Thanks for your reply. I tried with your code still no result and no error.
I want to update delivery and pik quanitity also. check my code and any necessary inputs required please tell..
WA_VBKOK_WA-VBELN_VL = ls_it_lips1-vbeln.
WA_VBKOK_WA-VBTYP_VL = 'T'.
move WA_VBKOK_WA to VBKOK_WA.
DELIVERY = ls_it_lips1-vbeln.
loop at lt_it_lips1 into ls_it_lips1.
WA_VBPOK_TAB-VBELN_VL = ls_it_lips1-vbeln.
WA_VBPOK_TAB-POSNR_VL = ls_it_lips1-posnr.
WA_VBPOK_TAB-VBELN = ls_it_lips1-vbeln.
WA_VBPOK_TAB-POSNN = ls_it_lips1-posnr.
WA_VBPOK_TAB-MATNR = ls_it_lips1-matnr.
WA_VBPOK_TAB-WERKS = ls_it_lips1-werks.
APPEND WA_VBPOK_TAB to VBPOK_TAB.
*MOVE WA_VBPOK_TAB to VBPOK_TAB.
endloop.
loop at lt_it_lips1 into ls_it_lips1.
WA_PROTT-VBELN = ls_it_lips1-vbeln.
WA_PROTT-POSNR = ls_it_lips1-posnr.
WA_PROTT-matnr = ls_it_lips1-matnr.
WA_PROTT-arktx = ls_it_lips1-arktx.
WA_PROTT-LFIMG = ls_it_lips1-LFIMG.
WA_PROTT-VRKME = ls_it_lips1-VRKME.
APPEND WA_PROTT to PROTT .
*MOVE WA_PROTT to PROTT.
endloop.
CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
EXPORTING
VBKOK_WA = VBKOK_WA
SYNCHRON = 'X'
NO_MESSAGES_UPDATE_1 = 'X'
COMMIT = 'X'
DELIVERY = DELIVERY
UPDATE_PICKING = 'X'
IMPORTING
EF_ERROR_ANY = EF_ERROR_ANY
EF_ERROR_IN_ITEM_DELETION = EF_ERROR_IN_ITEM_DELETION
EF_ERROR_IN_POD_UPDATE = EF_ERROR_IN_POD_UPDATE
EF_ERROR_IN_INTERFACE = EF_ERROR_IN_INTERFACE
EF_ERROR_IN_GOODS_ISSUE = EF_ERROR_IN_GOODS_ISSUE
EF_ERROR_IN_FINAL_CHECK = EF_ERROR_IN_FINAL_CHECK
EF_ERROR_PARTNER_UPDATE = EF_ERROR_PARTNER_UPDATE
EF_ERROR_SERNR_UPDATE = EF_ERROR_SERNR_UPDATE
TABLES
VBPOK_TAB = VBPOK_TAB
PROT = PROTT
EXCEPTIONS
error_message = 99.
data c_message_id type MSGID.
Certain messages do not appear only sy-subrc is set
IF sy-subrc = 99.
wa_prott-msgno = '000'(037).
wa_prott-msgty = 'E'(036).
wa_prott-msgid = c_message_id.
wa_prott-msgv1 = 'Delivery'(034).
wa_prott-msgv2 = delivery.
wa_prott-msgv3 = 'cannot be updated'(035).
*prott-MSGV4 = it
APPEND wa_prott to prott1.
ENDIF.
Thanks,
Venkat.
Edited by: venkat1011 on Apr 7, 2011 10:47 AM -
Delivery POD(CRR) Status upate problem in FM WS_DELIVERY_UPDATE_2
Hey guys,
I am using FM WS_DELIVERY_UPDATE_2 to create a POD for a delivery, it is creating the POD, but it isn't updating the status POD in that delivery, and this happens because in fact he is not confirming the POD created.
I am setting in the VBKOK_WA the KZPOD field with the value B for him to verify and confirm the POD, and also the fields PODAT and POTIM, also i am filling the table TVPOD_TAB with the data needed to create.
For last, i filled also the table VBPOK_TAB with the delivery and items to "update" and setting in the field KZPOD the value B.
Can you give me a tip about what is happening for he to don't confirm the POD and update the status in the delivery?
Note: I have tried without using the vbpok_tab table and the result was the same.
Thanks in advice,
Carlos SoaresHi Carlos,
You could check the parameter of the WS_DELIVERY_UPDATE_2, it seems it should be:
CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
EXPORTING
vbkok_wa = ls_vbkok
delivery = iv_outb_vbeln
TABLES
vbpok_tab = lt_vbpok
prot = gt_prot
Take a look at the SAP note 877234.
Regards,
Christian Rosa -
WS_DELIVERY_UPDATE_2
Hi friends,
I am using for the first time the function - WS_DELIVERY_UPDATE_2, it works almost fine except the it keeps giving me a message that the serial item is in EDEL status.
It was not before but ofcourse now it is.
Could some one help me out with the problem how eliminate the msg.
Thanks,
Mike RoeslerHI Carl,
did you check this in the FM WS_DELIVERY_UPDATE_2
exporting parameters, all these are error related parameters.
<b>*" EXPORTING
*" VALUE(EF_ERROR_ANY) TYPE XFELD
*" VALUE(EF_ERROR_IN_ITEM_DELETION) TYPE XFELD
*" VALUE(EF_ERROR_IN_POD_UPDATE) TYPE XFELD
*" VALUE(EF_ERROR_IN_INTERFACE) TYPE XFELD
*" VALUE(EF_ERROR_IN_GOODS_ISSUE) TYPE XFELD
*" VALUE(EF_ERROR_IN_FINAL_CHECK) TYPE XFELD
*" VALUE(EF_ERROR_PARTNER_UPDATE) TYPE XFELD
*" VALUE(EF_ERROR_SERNR_UPDATE) TYPE XFELD</b>
Regards
vijay -
WS_DELIVERY_UPDATE_2 - picked quantity with negative values
Hello All,
I have a problem when I call function WS_DELIVERY_UPDATE_2.
I have to update picked quantity from the delivery. If I have to update qty from 2 to 3, there is no problem. The corresponding parameter (pikmg) will contain '1' and the new values will be 3.
But the problem is when I want to have a smaller value. If I have to update qty from 3 to 2, the parameter will contain '-1' , but this parameter can only have positive values, so an error message is returned.
Does anyone know how to specify a smaller picked quantity or how to decrease this quantity?
Can anyone help me?
Many thanks in advance.
Best Regardscheck if you are passing the below parameters.
CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
EXPORTING
vbkok_wa = ls_vbkok
no_messages_update_1 = 'X'
commit = 'X'
delivery = p_delivery
if_error_messages_send = ' '
IMPORTING
ef_error_any = lv_error_any
ef_error_in_item_deletion = lv_error_in_item_deletion
ef_error_in_pod_update = lv_error_in_pod_update
ef_error_in_interface = lv_error_in_interface
ef_error_in_goods_issue = lv_error_in_goods_issue
ef_error_in_final_check = lv_error_in_final_check
ef_error_partner_update = lv_error_partner_update
ef_error_sernr_update = lv_error_sernr_update
TABLES
vbpok_tab = p_vbpok
tvpod_tab = p_tvpod. -
Handle errors/exceptions in WS_DELIVERY_UPDATE_2
hi all,
I am tryng to do batch split using 'WS_DELIVERY_UPDATE_2'. it did split in few cases.
but my problem is when executing in foreground it there is error in input data the function module just throws a 'E' error and program stops.
how to handle errors/exceptions. it just stops there and i am not able to continue with the program further.
CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
EXPORTING
vbkok_wa = it_vbkok_wa
synchron = 'X'
NO_MESSAGES_UPDATE_1 = ' '
commit = v_commit
delivery = v_delvry
UPDATE_PICKING = ' '
NICHT_SPERREN_1 = ' '
IF_CONFIRM_CENTRAL = ' '
IF_WMPP = ' '
IF_GET_DELIVERY_BUFFERED = ' '
IF_NO_GENERIC_SYSTEM_SERVICE = ' '
if_database_update_1 = '1'
IF_NO_INIT_1 = ' '
IF_NO_READ_1 = ' '
if_error_messages_send = 'X'
IF_NO_BUFFER_REFRESH = ' '
IT_PARTNER_UPDATE =
IT_SERNR_UPDATE =
IF_NO_REMOTE_CHG_1 = ' '
IF_NO_MES_UPD_PACK = ' '
IF_LATE_DELIVERY_UPD = ' '
IMPORTING
EF_ERROR_ANY = EF_ERROR_ANY
EF_ERROR_IN_ITEM_DELETION = EF_ERROR_IN_ITEM_DELETION
EF_ERROR_IN_POD_UPDATE = EF_ERROR_IN_POD_UPDATE
EF_ERROR_IN_INTERFACE = EF_ERROR_IN_INTERFACE
EF_ERROR_IN_GOODS_ISSUE = EF_ERROR_IN_GOODS_ISSUE
EF_ERROR_IN_FINAL_CHECK = EF_ERROR_IN_FINAL_CHECK
EF_ERROR_PARTNER_UPDATE = EF_ERROR_PARTNER_UPDATE
EF_ERROR_SERNR_UPDATE = EF_ERROR_SERNR_UPDATE
TABLES
vbpok_tab = it_vbpok_tab[]
PROT =
VERKO_TAB =
VERPO_TAB =
VBSUPCON_TAB_1 =
IT_VERPO_SERNR =
IT_PACKING =
IT_PACKING_SERNR =
IT_REPACK =
it_handling_units_1 = it_rehang[]
IT_OBJECTS =
ET_CREATED_HUS = it_CREATED_HUS[]
TVPOD_TAB =
if sy-subrc = '0'.
write:/ 'ok'.
else.
write:/ 'failed'.
endif.Change your code to:
if_error_messages_send = space
If you send 'X' the messages are displayed, otherwise they don't. Look at the message_send_check_do routine in the FM. -
Error BS001 (- HUGENERAL099) using WS_DELIVERY_UPDATE_2
Hello,
I get the BS001 ("No status object is available for &") error while updating HU with the function "WS_DELIVERY_UPDATE_2" under SAP release ECC 6.00.
Under SAP release 4.6C all worked fine. Does anyone have an idea?
kind regards Jürgen KrößHi
Thanks for your reply..
This is webdynpro related application, i am using bapi_transaction_commit after every bapi, and even i checked DB tables,
HUs are created at DB level also, then where is the problem.. check code please... this code i tried at se38 giving same error..
can you check with this code once.. in your sys.
DATA: lw_vbkok TYPE vbkok,
lt_vbpok TYPE TABLE OF vbpok,
lw_vbpok TYPE vbpok,
l_vbeln TYPE vbeln_vl.
l_vbeln = '0084000104'.
lw_vbkok-vbeln_vl = l_vbeln.
lw_vbkok-vbeln = l_vbeln.
*vbkok_wa-wabuc = 'X'.
lw_vbpok-vbeln_vl = l_vbeln.
lw_vbpok-posnr_vl = '000010'.
lw_vbpok-vbeln = l_vbeln.
lw_vbpok-posnn = '000010'.
lw_vbpok-pikmg = '1'.
APPEND lw_vbpok TO lt_vbpok.
DATA : VERKO_TAB TYPE TABLE OF VERKO,
WA_VERKO_TAB TYPE VERKO,
VERPO_TAB TYPE TABLE OF VERPO,
WA_VERPO_TAB TYPE VERPO.
WA_VERKO_TAB-VENUM = '0000003373' ."ls_pack_mat-INT_HAND_UNIT.
WA_VERKO_TAB-EXIDA = 'E'.
WA_VERKO_TAB-EXIDV = '00000000001000002279' ."ls_pack_mat-HANDLING_UNIT.
WA_VERKO_TAB-VSTEL = '2000'.
APPEND WA_VERKO_TAB to VERKO_TAB.
loop at lt_it_lips1 into ls_it_lips1.
WA_VERPO_TAB-VENUM = '0000003373'.
WA_VERPO_TAB-EXIDV_OB = '00000000001000002279' .
WA_VERPO_TAB-EXIDV = '00000000001000002279' .
WA_VERPO_TAB-VELIN = '1'.
WA_VERPO_TAB-VBELN = l_vbeln.
WA_VERPO_TAB-POSNR = '000010'.
CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
EXPORTING
vbkok_wa = lw_vbkok
commit = 'X'
delivery = l_vbeln
update_picking = 'X'
IF_NO_MES_UPD_PACK = 'X'
TABLES
vbpok_tab = lt_vbpok
VERKO_TAB = VERKO_TAB
VERPO_TAB = VERPO_TAB.
Thanks,
Venkat. -
Regarding WS_DELIVERY_UPDATE_2 and COMMIT WORK AND WAIT
Hi Experts,
My problem is, when I try to update 1 record more than 1 time, the data(Item delivery quantity)getting cleared after 2 or 3 attempts. Sometimes it was happening for 5 time and so on..
If i do debugg, it was not happening.
I was using Z F.M. i.e. - ZWM_SAISIE_PAL_LIV. This F.M has WS_DELIVERY_UPDATE_2.
Below i have mentioned my code.
Thanks & Regards,
Sree.
Moderator message - Please respect the 5,000 character maximum when posting. Post only the relevant portions of code
Edited by: Rob Burbank on Sep 20, 2011 10:58 AMs
-
Packing materials in delivery problem
Hi ,
I m creating handling units with BAPI_HU_CREATE and then packing them with BAPI_HU_PACK. But the problem is the items that i pack dont go away from my lower table in delivery, they remain available for packing.
My objective is to programmatically do the following
1. Create handling units
2. Pack items in the delivery in the handling units
Will give points for the right answer, especially code. Thanks for readingHi,
To pack items in handling unit linked to a delivery, you can use FM WS_DELIVERY_UPDATE_2.
Here is an example of the call of FM:
w_vbkok-vbeln_vl = p_vbeln. "delivery number
w_verko-exidv = wa_vekp_pal-exidv. "HU in which you pack
APPEND w_verko TO i_verko.
CLEAR w_verpo.
w_verpo-exidv_ob = wa_vekp_pal-exidv.
w_verpo-EXIDV = wa_vekp_col-exidv.
w_verpo-velin = '3'. " 3 to pack a HU in another one
" 1 to pack a material in a HU
w_verpo-vbeln = p_vbeln.
APPEND w_verpo TO i_verpo.
CLEAR i_repack.
w_repack-desthu = wa_vekp_pal-exidv. "HU in which you pack
w_repack-sourcehu = wa_vekp_col-exidv. "HU to be packed
w_repack-packhu = 'X'.
APPEND w_repack TO i_repack.
CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
EXPORTING
vbkok_wa = w_vbkok "delivery number
delivery = p_vbeln
TABLES
prot = i_prot
verko_tab = i_verko
verpo_tab = i_verpo
it_repack = i_repack
EXCEPTIONS
error_message = 1
OTHERS = 2.
COMMIT WORK AND WAIT. -
I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
LeftyThis was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
boolean active = true;
public void run(){
ss.setSoTimeout(90);
while (active){
try{
serverSocket = ss.accept();
catch (SocketTimeoutException ste){
// do nothing
// interrupt thread
public void deactivate(){
active = false;
// you gotta sleep for a time longer than the
// accept() timeout to make sure that timeout is finished.
try{
sleep(91);
}catch (InterruptedException ie){
interrupt();
} -
A problem with Threads and MMapi
I am tring to execute a class based on Game canvas.
The problem begin when I try to Play both a MIDI tone and to run an infinit Thread loop.
The MIDI tone "Stammers".
How to over come the problem?
Thanks in advance
Kobi
See Code example below:
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
public class MainScreenCanvas extends GameCanvas implements Runnable {
private MainMIDlet parent;
private boolean mTrucking = false;
Image imgBackgound = null;
int imgBackgoundX = 0, imgBackgoundY = 0;
Player player;
public MainScreenCanvas(MainMIDlet parent)
super(true);
this.parent = parent;
try
imgBackgound = Image.createImage("/images/area03_bkg0.png");
imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
imgBackgoundY = this.getHeight() - imgBackgound.getHeight();
catch(Exception e)
System.out.println(e.getMessage());
* starts thread
public void start()
mTrucking = true;
Thread t = new Thread(this);
t.start();
* stops thread
public void stop()
mTrucking = false;
public void play()
try
InputStream is = getClass().getResourceAsStream("/sounds/scale.mid");
player = Manager.createPlayer(is, "audio/midi");
player.setLoopCount(-1);
player.prefetch();
player.start();
catch(Exception e)
System.out.println(e.getMessage());
public void run()
Graphics g = getGraphics();
play();
while (true)
tick();
input();
render(g);
* responsible for object movements
private void tick()
* response to key input
private void input()
int keyStates = getKeyStates();
if ((keyStates & LEFT_PRESSED) != 0)
imgBackgoundX++;
if (imgBackgoundX > 0)
imgBackgoundX = 0;
if ((keyStates & RIGHT_PRESSED) != 0)
imgBackgoundX--;
if (imgBackgoundX < this.getWidth() - imgBackgound.getWidth())
imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
* Responsible for the drawing
* @param g
private void render(Graphics g)
g.drawImage(imgBackgound, imgBackgoundX, imgBackgoundY, Graphics.TOP | Graphics.LEFT);
this.flushGraphics();
}You can also try to provide a greater Priority to your player thread so that it gains the CPU time when ever it needs it and don't harm the playback.
However a loop in a Thread and that to an infinite loop is one kind of very bad programming, 'cuz the loop eats up most of your CPU time which in turn adds up more delays of the execution of other tasks (just as in your case it is the playback). By witting codes bit efficiently and planning out the architectural execution flow of the app before start writing the code helps solve these kind of issues.
You can go through [this simple tutorial|http://oreilly.com/catalog/expjava/excerpt/index.html] about Basics of Java and Threads to know more about threads.
Regds,
SD
N.B. And yes there are more articles and tutorials available but much of them targets the Java SE / EE, but if you want to read them here is [another great one straight from SUN|http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html] .
Edited by: find_suvro@SDN on 7 Nov, 2008 12:00 PM -
Hi all,
I would like to ask you for a help. I need to write a small program at my university. I started to write a midlet which function would be to countdown time for sports activities. I woul like to start a new thread - the one that counts down - and at the same time make the main thread sleep. After the "countdown" thread finishes, the main thread wakes up and waits for user input. The problem is that when the "countdown" thread finishes his work, I've got Uncaught exception java/lang/NullPointerException. error and the midlet halts.
Below you can find the code
import java.lang.*;
import java.util.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class intervals extends MIDlet implements CommandListener
public Display ekran;
private SweepCanvas sweeper;
private Form rundy;
private TextField round0, round1, round2, round3, round4, round5, round6, round7, round8;
private long czas,x;
private Command exitCommand;
private Command addRound;
private Command delRound;
private Command start;
private TextField repeat;
private Form odliczanie;
private Alert ostrz;
Licznik thread;
String test;
StringItem test1;
int parz,i,j,k;
static int l;
int ilrund;
int ilpowt;
Item sec;
long sec1;
public intervals()
rundy = new Form("Interwały sportowe");
exitCommand = new Command("Wyjście", Command.EXIT, 2);
addRound = new Command("Dodaj","Dodaj rundę", Command.ITEM,1);
delRound = new Command("Usuń","Usuń ostatnią rundę", Command.ITEM,1);
start = new Command("Start", Command.ITEM,1);
odliczanie = new Form("Odliczanie");
TextField dodaj(TextField kolej)
kolej=new TextField("Podaj czas (s) rundy "+parz,null, 4, TextField.NUMERIC);//stworzenie nowej instancji do wybierania czasu trwania rundy
if(rundy.size()==0)
rundy.insert(rundy.size(),kolej);
else
rundy.insert(rundy.size()-1, kolej);
return kolej;
void odliczanie(TextField round)
monitor m=new monitor();
k=Integer.parseInt(round.getString());
ekran.setCurrent(odliczanie);
thread=new Licznik(k,odliczanie);
thread.start();
ekran.setCurrent(rundy);
public void startApp()// throws MIDletStateChangeException
rundy.deleteAll();
repeat = new TextField("Podaj ilość powtórzeń",null,1,TextField.NUMERIC);
rundy.addCommand(addRound);
rundy.addCommand(exitCommand);
rundy.setCommandListener(this);
Canvas obrazek = new MyCanvas();
ekran = Display.getDisplay(this);
ekran.setCurrent(obrazek);
czas=System.currentTimeMillis();
while (System.currentTimeMillis()<czas+1000)
continue;
ekran.setCurrent(rundy);
public void pauseApp()
public void destroyApp(boolean unconditional)
notifyDestroyed();
public void commandAction(Command c, Displayable s)
if (c == exitCommand)
destroyApp(false);
notifyDestroyed();
else if(c==addRound)
if(rundy.size()==0)//Sprawdzenie ilości elementów w celu poprawnego wyświetlania liczby rund w formie
parz=1;
else
parz=rundy.size();
switch(parz)
case 1:
round0=dodaj(round0);break;
case 2:
round1=dodaj(round1);break;
case 3:
round2= dodaj(round2);break;
case 4:
round3=dodaj(round3);break;
case 5:
round4=dodaj(round4);break;
default:
ostrz=new Alert("Uwaga","Maksymalna liczba rund wynosi 9", null, AlertType.INFO);
ostrz.setTimeout(3000);
ekran.setCurrent(ostrz);
if(rundy.size()==1)
rundy.append(repeat);
rundy.addCommand(start);
rundy.addCommand(delRound);
else if(c==delRound)
if(rundy.size()!=0)
rundy.delete(rundy.size()-2);
if (rundy.size()==1)
rundy.deleteAll();
if(rundy.size()==0)
rundy.removeCommand(delRound);
rundy.removeCommand(start);
else if(c==start)
ilrund=rundy.size()-1;
if(this.repeat.size()>0)
ilpowt=Integer.parseInt(this.repeat.getString());
ekran = Display.getDisplay(this);
for (i=1; i<=ilpowt;i++)
odliczanie= new Form("Odliczanie");
for (j=0;j<ilrund;j++)
switch(j)
case 0:
odliczanie(round0);
break;
case 1:
odliczanie(round1);
break;
case 2:
odliczanie(round2);
break;
case 3:
odliczanie(round3);
break;
case 4:
odliczanie(round4);
break;
case 5:
odliczanie(round5);
break;
case 6:
odliczanie(round6);
break;
case 7:
odliczanie(round7);
break;
case 8:
odliczanie(round8);
break;
class Licznik extends Thread
int czas1,k;
Form forma;
monitor m;
public Licznik(int k,Form formap)
czas1=k;
forma=formap;
public synchronized void run()
while(czas1>0)
forma.deleteAll();
forma.append("Czas pozostały (s): "+czas1);
try{Thread.sleep(1000);} catch(InterruptedException e){e.printStackTrace();}
czas1--;
if(czas1<=0)
m.put();
}and monitor class
public class monitor
boolean busy=false;
synchronized void get()
if(!busy)
try
wait();
}catch(InterruptedException e){e.printStackTrace();}
notify();
synchronized void put()
if(busy)
try
wait();
}catch(InterruptedException e){e.printStackTrace();}
busy=true;
notify();
}Can anybody help me with this?Groovemaker,
Your Licznik class has a member m of type monitor, which has not been instantiated (in other words is null) hence, when calling m.put() you get NullPointerException. Please also mind, that using Thread.sleep(1000) is not an accurate way of measuring time.
If I may, please use recommended for Java class naming conventions - some of your names use lower case, while other don't which is confusing to the reader.
Daniel -
Problem with threads within applet
Hello,
I got an applet, inside this applet I have a singleton, inside this singleton I have a thread.
this thread is running in endless loop.
he is doing something and go to sleep on and on.
the problem is,
when I refresh my IE6 browser I see more than 1 thread.
for debug matter, I did the following things:
inside the thread, sysout every time he goes to sleep.
sysout in the singleton constructor.
sysout in the singleton destructor.
the output goes like this:
when refresh the page, the singleton constructor loading but not every refresh, sometimes I see the constructor output and sometimes I dont.
The thread inside the singleton is giving me the same output, sometime I see more than one thread at a time and sometimes I dont.
The destructor never works (no output there).
I don't understand what is going on.
someone can please shed some light?
thanks.
btw. I am working with JRE 1.1
this is very old and big applet and I can't convert it to something new.Ooops. sorry!
I did.
public void start() {
public void stop() {
public void destroy() {
try {
resetAll();
Configuration.closeConnection();
QuoteItem.closeConnection();
} finally {
try {
super.finalize();
} catch (Throwable e) {
e.printStackTrace();
} -
Problem with Threads and a static variable
I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
protected static void Init(){
objMainProcess = new Thread() {
public void run() {
while( objMainProcess == Thread.currentThread() ) {
GetState();
objMainProcess.setDaemon( true );
objMainProcess.start();
public static void initStatusTimer(){
if(objTimer == null)
objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
public void actionPerformed( java.awt.event.ActionEvent evt){
SetState();
private static void SetState(){
if( objMainProcess == null ) return;
synchronized( objMainProcess ) {
bChanged = true;
try{
objMainProcess.notify();
}catch( IllegalMonitorStateException e ) {}
private static boolean GetState() {
if( objMainProcess == null ) return false;
synchronized( objMainProcess ) {
if( bChanged) {
SendMessage();
bChanged = false;
return true;
try {
objMainProcess.wait();
}catch( InterruptedException e ) {}
return false;
}Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D. -
Problem with threads running javaw
Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue; // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer) // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
// System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
}catch(Exception a){
JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run
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