How to handle thread

i am using two methods. one is send method to send message and another one is receive method to receive message.if i am typeing message that time i want check if any message is receive or not.If any receive i want to display that receive.

Double-post: http://forum.java.sun.com/thread.jspa?threadID=761176
You really don't seem to know how to handle threads...

Similar Messages

How to handle Thread synchronization

Hi guys,
already i have posted the question for this problem.
but there i didn't explain properly.
so, just bare with my explanation and give me solution.
i am doing with Swings,
I have,
Master class ( having main())
|
|
|
V
Sub Class-------> calling a thread class
here the child class will throw a msgbox after its completion of execution to the sub-class interface.
the code in the sub-class should continue only after the complete execution of the child thread, i.e after it got the msgbox thrown by child thread.
say, on the 100th line of sub-class file we are calling the child thread, then the 101st line should not get executed before the child thread has executed completely.
in my case it is getting executed.
how to handle the situation.
thanx in advance.
--subbu

Hi, thank you for your reply.
I am NOT creating a JVM in my C/C++ application.
The problem is when I call __declspec( thread ), the system crash.
Your suggestion is if I call from java to C++, for example, send data to C++, I do NOT need handle the thread whatever the C++ use thread and Socket.
You are right. The C++ code works well in VC++ environment. And the JNI code works well to call simple C++ code (testing).
I handle exception in Java side. That means I use try .. catch.. block to handle native method. But you mean I need check error and exception in C++ side ?
For example
jint err = env->MonitorEnter(obj);
if (err)
//todo
else
// todo
I will handle it in the real code.
I appreciate your suggestion.
Have a good day
anne

How to handle threading for TCP communication?

Hi,
I've a project to control two separate applications (C++ and LabView) and both of them are implemented as server. Another client program (C++) is used to control those application. The communication among them are implemented using TCP socket. The client program sends message to start or stop some tasks on the servers. The client program also sends time (hh:mm:ss) with the start and stop message to determine when to start or stop.
In C++ application (server): The application listens for connection and when gets one, it creates a communication thread to handle that and again listen for another connection. The communication thread handles message passing and when it receives start or stop message, it creates a timer thread with the received time to trigger a task at specified time. And after that it waits for message from the client. So, here, when thread (communication, timer) is needed, it is created.
In LabView (server): I've tried to create same thing as the C++ server. But, from LabView manual and others forum threads, I got that LabView is multithreading and it can be done using independent loop. So, I'd to create four loops in a diagram:
1. Listen for new connection
2. Handle communication for already received connection
3. Start timer
4. Stop timer
and they are run at the beginning of the execution and communication among them are managed using local variables. But, 2,3 and 4th loop can handle only one connection and it can handle another if the current is closed. But, the C++ application can handle more than one connection by creating thread when it is necessary but not at the beginning of the execution of the application.
Is there a better way to implement this in LabView?
Is it possible to handle multiple connections and create diagram node/block (like thread) dynamically like C++?
Thanks.
Using LabVIEW 2010, Visual C#, Visual C++ (2005, 2008, 2010)
Solved!
Go to Solution.

There are several ways to do this in modern LabVIEW and you should probably search the Example Finder for some TCP examples. The classic way is to transfer the connection refnum from the listen loop to a communication loop that adds it to an array of connection IDs and then continously iterates over this array to do the communication. It works since about LabVIEW 4.0 perfectly for me even for applications with HTTP based communication protocol. But you need to make sure of course that the communciation handling for one connection isn't delaying its work for some reasons as that would delay the handling of the other connections too, as they are really worked on sequentially. If you encounter an error, the connection ID is closed and removed from the array.
The other is that you create a VI that does your whole communication and terminates itself on an error or when getting the quit command. Make this VI to be reentrant and then launch it through VI server as reentrant instance, passing it the newly received connection refnum form the listen loop. Then use the Run method to let it start and operate like an independant thread.
For all of these you should be able to find an example in the Example Finder when searching for TCP.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

How to handle Big FIles in SAP PI Sender file adapter

Hi all ,
I have developed a interface , where it is File to Proxy, it is fine when i do with small and normal files
The structure contain one Header unbounded detail and one Trailer, how to handle when the file size is more than 40 MB
Thanking you
Sridhar

Hi Sridhar Gautham,
We can set a limit on the request body message length that can be accepted by the HTTP Provider Service on the Java dispatcher. The system controls this limit by inspecting the Content-Length header of the request or monitoring the chunked request body (in case chunked encoding is applied to the message). If the value of the Content-Length header exceeds the maximum request body length, then the HTTP Provider Service will reject the request with a 413 u201CRequest Entity Too Largeu201D error response. You can limit the length of the request body using the tting MaxRequestContentLength property of the HTTP Provider Service running on the Java dispatcher. By default, the maximum permitted value is 131072 KB (or 128MB).You can configure the MaxRequestContentLength property using the Visual Administrator tool. Proceed as follows:
       1.      Go to the Properties tab of the HTTP Provider Service running on the dispatcher.
       2.      Choose MaxRequestContentLength property and enter a value in the Value field. The length is specified in KB.
       3.      Choose Update to add it to the list of properties.
       4.      To apply these changes, choose (Save Properties).
The value of the parameter MaxRequestContentLength has to be set to a high value.
The Visual administartor tool may be accessed using this link
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/40a08db9-59b6-2c10-5e8f-a4b2a9aaa3d2?quicklink=index&overridelayout=true
In short ICM parameters to reset values for this case are
icm/HTTP/max_request_size_KB
icm/server_port_ TIMEOUT
rdisp/max_wprun_time
zttp/max_memreq_MB
Please look into this thread to know more about ICM parameters
http://help.sap.com/saphelp_nw04/helpdata/en/61/f5183a3bef2669e10000000a114084/frameset.htm
Second solution is that you must split the source file, so that each file is less than 5MB in size, then PI would not cause problem for file size between 1MB-5MB. you can insert header and trailer for individual smaller file obtained after split. All this can be done using scripts or conventional programing provided individual records within file are independent of each other. Finally you have to rename each new file created and put them in PI folder in sequential manner. All this can be achieved by simple shell script/batch file, a C code or java code. If you are going for a C or Java code you need a script to call them from PI communication channel parameter "run operating system command before message processing".
regards
Anupam

How to handle multiple request in the servlet

how to handle multiple request in the servlet...
Example:
java forum...
i'm login in the java forum at this time 1000 members make login in this....how happended in servlet?
if we use thread how to implement in servlet ?

Serlets are already threaded. The application container instantiates the servlet, then uses this instance in a new thread for every use.
This is the reason that you should use (almost) no instance variables in a Servlet, but rather that (almost) everything should be local to the method.

How to handle the dynamic rows in pdf table

Dear All,
earlier i posted one thread reagarding getting pdf table data
[facing problem while getting interactive form table data;
this is working fine, i sued bind_table in wddoinit, but here i am fixing the rows count and bind_table.
for example i have initially taken row count as 3 then i want to increase the rows in pdf table.
i know we can use the formcalc to increase the rows by taking a button in pdf layout.
this also working, but the data is not picking for newly added rows, i hope the problem is because the table node in the context is not binded for this new rows.
even i tried using with webdynpro native button controlls still not working.
any one help me what exactly this bind_table is doing and how to handle this code in form calc.
since my table is pdf table.
Thanks,
Mahesh.Gattu

Hi Thomas,
Thanks for your confirmation,
i have checked the paramets of submit button we have only wdevent parameters they are
CL_WD_CUSTOM_EVENT
          PARAMETERS - Hashed table having 2 columns
          ID     ->IF_TDS (Interactive Form element Name)
         CONTEXT_ELEMENT     ->->
these are same in case of submit button1 and submit button 2.
          NAME - Name of the Button Event i.e ON_SUBMIT ( this is also same in both the buttons).
so i think it is not possible to work with multiple buttons by assinging to multiple tables on form.
The other option is to place the buttons outside of the forum in the surrounding WDA area.
This way you have no problem handling the events.
in wddoinit if i use bind_table with 5 rows form table is populating with 5 rows, but when i take a button
out side the form and use bind_table by incremeting the rows the pdf table rows are not adding, if i enter
some thing on pdf table then click on add row button then the table rows are getting add. if i don't do any
action on pdf table and click on add row button pdf is not getting update.
is there any issue.. if i don't keep cursor on table and type some thing.. the add button is not updating
the rows.
if i take a button on wd view i.e outside the form and use bind table i shall add the rows.. but in case of remove rows how to do.
in case of normal table we can use Remove_Element( ) but how can i know the selected row from the pdf table, please help me in this concern also.
Regards,
Mahesh.Gattu
Edited by: Maheshkumar gattu on Jan 7, 2009 3:57 PM
Edited by: Maheshkumar gattu on Jan 7, 2009 4:03 PM
Edited by: Maheshkumar gattu on Jan 7, 2009 5:21 PM

How to handle 2 or more .jar files with an applet

Hey out there
I have created an ftpClient application that uses "jakarta ftpClient". It works fine as an JFrame application � But when I converted the Application into an JApplet I get the following Exception:
java.lang.NoClassDefFoundError: org/apache/commons/net/ftp/FTPClient
I have bundled the main application into a .jar file (Application,jar). But I don't know how to handle the 2 jakarta .jar files with my JApplet??
I Tried to append the 2 jakarta .jar files to the Application,jar with the following code:
jar cvf Application.jar 1.class 2.class�. commons-net-1.4.1.jar jakarta-oro-2.0.8.jar
But with the same result / Exception (I have signed the Jar file!)
Can anyone help me

Hi i have a question with your application can you down- or upload more files at the same time? Because i'm having problems with my ftp application.
Here is the link with my problem maybe you can help me. I will be very pleased when you can help me.
http://forum.java.sun.com/thread.jspa?threadID=5162042&tstart=0
Thx
Satanduvel

How to handle table selection

In the uix guidelines i found the following example on how to handle table selection:
public static EventResult doSelectionEvent(BajaContext bc, Page page,
PageEvent event)
DataObject tableRows = new PageEventFlattenedDataSet(event, "table1");
int index = SelectionUtils.getSelectedIndex(tableRows);
String name = "Nothing Selected";
// make sure that something was selected:
if (index>=0)
DataObject row = TABLEDATA.getItem(index);
name = row.selectValue(null, "name").toString();
EventResult result = new EventResult(page);
result.setProperty("action", event.getName());
result.setProperty("name", name);
return result;
It is not clear to me what TABLEDATA is.
I read in some other thread that it is a DataObjectList and it represents the 'stored dataObjects'.
I suppose '_TABLE_DATA' is not real code, may i ask for an example with real code to understand what it is?
Thanks.

This code works for me, I hope it is useful.
(NB: i fear you will not read correctly the line
with the getRowAtRangeIndex instruction. It's a problem with the editor).
Mauro
package view;
import javax.servlet.http.HttpServletRequest;
import oracle.adf.controller.struts.actions.DataActionContext;
import oracle.adf.controller.struts.actions.DataForwardAction;
import oracle.cabo.ui.beans.table.SelectionUtils;
import oracle.cabo.ui.data.ServletRequestDataSet;
import oracle.jbo.ApplicationModule;
import oracle.jbo.Row;
import oracle.jbo.ViewObject;
public class GestEsAction extends DataForwardAction
// To handle an event named "yourname" add a method:
// public void onYourname(DataActionContext ctx)
public void onValida(DataActionContext ctx)
ServletRequestDataSet ds = new ServletRequestDataSet(req,"ReEsamiRichView12");
int[] indices = SelectionUtils.getSelectedIndices(ds);
ApplicationModule am = ctx.getBindingContainer().
getApplicationModule();
ViewObject vo = am.findViewObject("ReEsamiRichView1");
int len = indices.length;
String idEsameRich, currStato;
for(int i=0; i<len; i++)
Row row = vo.getRowAtRangeIndex(indices);
idEsameRich = row.getAttribute("IdEsameRich").toString();
currStato = row.getAttribute("Stato").toString();
if (currStato.equals("E"))
row.setAttribute("Stato","V");
am.getTransaction().commit();
// To override a method of the lifecycle, go to
// the main menu "Tools/Override Methods...".

How to handle multiple requests to the same servlet at one time?

Hi,
I am new to Servlets. I have doubt regarding ... Handling multiple requests to a servlet at a time.
If we send a single request to a servlet, as know that group of objects such as servlet, servletContext, servletConfig, request, response and etc are created in the server, And if 1000's of requests are sent to a same servlet at a time, and if server memory capacity is less, then 1000's of objects are created in a server which would be heavy burden to Server. How to handle the application and development in such situation?
Kind regards,
veerendra

Hi veerendra reddy ,
By default any web server can will have a thread pool to handle client req's.
In your point also heavy burden to server you are telling that depends on this.
we can configure this min & max size of this thread pool.
by default it will be 0-1000 for tomcat server.
I am not sure in which file this configuration will be.
But I hope in server.xml or some xml file consists this info.
If You what you can edit accordingly. to overcome your heavy burden to server.
Thanks & Regards
Nagendra

How to Handle user Session in JSP

Help me,
How to handle user session in JSP.......

Prakash_Pune wrote:
tell me some Debugging tech. so i can overcome from my problem.....Do you use an IDE? Any IDE ships with a decent debugger where in you can just execute the code step by step, explore the current variable values and check what exactly is happening. For example Eclipse or IntelliJ. If you don´t use an IDE, then just place some System.out.println() or Logger.debug() statements at strategic locations printing the variables of relevance so that you can track in logs what exactly is happening.
or tell any other way to find is my page is thread safe or not...Just write correct code and narrow the scope of the variables as much as possible. If you for example assigned the user object to a static variable or as a servlet´s instance variable, then exactly the same user object would be used everywhere in the application. That kind of logical things.

How to handle multiple connection or user with l2cap

hi friends,
I need your help please a.s.a.p
how to handle multiple connection with l2cap protocol in j2me
sorry,
I'm a new programmer in j2me
thanks all...

Please stick with the original thread http://forum.java.sun.com/thread.jspa?threadID=5200413&tstart=0
Cross-posting is very rude, and JSch has nothing to do with JSSE, directly. It is an SSH2 API. It does (AFAIK) use some parts of JSSE, but those parts are definately not your problem.
You already have answers in the other thread.

How to Handle Huge record count in JDBC

Hi,
Can we process 20 lakhs records which would size near to 136 MB using JDBC sender channel in a single call and the same need to deliver to Target system which is JDBC too.
Kindly mention which way this can be achieved.
Regards

Hi Venkata,
Kindly go through this below link to processing the huge amount of data from the sender JDBC.
http://scn.sap.com/people/peng.shen2/blog/2009/12/23/pi-how-to-handle-high-volume-data-per-jdbc-adapter
https://scn.sap.com/thread/2005124
http://scn.sap.com/community/pi-and-soa-middleware/blog/2012/09/24/jdbc-receiver-scenarios-best-practices--how-to-handle-high-volume-load-stored-procedure-design-part6
Best Regards,
Monikandan.

How to handle imaginary numbers in Flash

How to handle imaginary numbers in Flash ? any ideas out
there please

I don't know but google does:
http://board.flashkit.com/board/showthread.php?t=723964
Or rather someone at the end of the search seems to.
Go about half way down that thread. Seems like something
relevant

I bought a cd with Lightroom 5. After installation and registration I am not able to use 'help' function and I cannot update the software. I anyone able to give me a hint how to handle it? Thank you ind advance Karl

I bought a cd with Lightroom 5. After installation and registration I am not able to use 'help' function and I cannot update the software. Is anyone able to give me a hint how to handle it?
Thank you in advance
arl

Hi Keith, sorry for my late reply.
Surely I am able to connect to the help function when Icontact the website
of AdobeLR5.The problem is as follows,
When I open LR5 on my computer and work with it and try to open the help
function in the software, I don't get it.
When I bought the CD I was naiv enough to believe that I get an independent
working software. I learned in the meantime, that the seller does not allow
to work with, without being connected to them.
I don't believe that I am paranoid, but I like to buy something and use it
without to inform the supplier that I do it. Otherwise I could have bought
the license fpr LR5 via internet.
Best regards
Karl
2015-01-02 13:42 GMT+01:00 kglad <[email protected]>:
I bought a cd with Lightroom 5. After installation and registration I
am not able to use 'help' function and I cannot update the software. I
anyone able to give me a hint how to handle it? Thank you ind advance Karl
kglad <https://forums.adobe.com/people/kglad?et=watches.email.outcome>
marked Keith_Reeder
<https://forums.adobe.com/people/Keith_Reeder?et=watches.email.outcome>'s
reply on I bought a cd with Lightroom 5. After installation and
registration I am not able to use 'help' function and I cannot update the
software. I anyone able to give me a hint how to handle it? Thank you ind
advance Karl
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How to handle a big number of users on our website

Hello,
We are working on UCM 10gR3.
We made a web site with Site Studio and now we are testing the web
site with a big number of users : the number of users increase one by
one each interval of time until 500 users.
For this test, we first set :
- NumConnections=100 (number of connections to the database)
- CachedResultRowCount=40000 (number of rows in the cache)
With this set up, the server became unreachable with 250 users. We
noticed that at this time, the number of threads were stuck to 100 and
the cache was full (we saw these information in the "System Audit
Information page").
Then we restarted the tests with :
- NumConnections=100
- CachedResultRowCount=40000
- MaxRequestThreadCount=500
With this configuration we went until 400 users but then, the server
was unreachable. With this test, the number of threads was still stuck
to 100 (even if we set 500) and the cache was full when the server failed.
Does anyone have any tips, knowledge, clue about at least one of this
variable or about how to handle a lot of connections to a web site
made by Site Studio ?
Any little detail could be very helpful to us.
It is very urgent because we are running the final tests in 9 hours !
Thank you in advance.
Julian

Thank you for this answer.
However, I am looking for indications about the UCM configuration only.
Specially the following variables :
- NumConnections
- SearchCacheCleanerInterval
- MaxSearchConnections
- CachedResultRowCount
- MaxRequestThreadCount
Regards,

How to handle thread

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