String returns null when more data is copied

[gaurav.gupta]

Hi All
Greeting for the day,

I am connecting to a webservice which returns me data in String format. The data returned can be 20,000 chars or more in volume. If i test it in Emulator then i get data successfully But when i test it on Nokia E72 device. It returns null.

Earlier when i was testing with less data it was working fine.

Please help me how can i overcome it.

[raj_J2ME]

Is the web service sending the data?
did you check this , when you hit the server using the device right now, server send the data?
Are you sure that the data is just null right now and this is not lesser in the volume?

[r2j7]

Earlier when i was testing with less data it was working fine.

How much less?

Regards,
r2j7

[gaurav.gupta]

How much less?

Regards,
r2j7

It was some what 15,000 characters.

[gaurav.gupta]

Is the web service sending the data?
did you check this , when you hit the server using the device right now, server send the data?
Are you sure that the data is just null right now and this is not lesser in the volume?

Yes sir it is sending data and i have tested it in emulator and i am able to view that data in emulator.But when i run the same code on device it returns null . i am appending it on form

When i am testing it with less data it works fine.
Actually i request some data from the webservice based on my request the webservice returns the data . now i am requesting less data from webservice. Please suggest me some solution

Let me tell you the scenario

 String response=service.execute(stringToSend);
            println(response);  appends null to form.


public void println(String s) {
        form.append(s + "\n");
    }

[raj_J2ME]

1.Yes sir it is sending data and i have tested it in emulator and i am able to view that data in emulator.

2.But when i run the same code on device it returns null . i am appending it on form
[COLOR="Green"]

1. That ok, means the server is sending the data. and hence you able to append the same in the form on the client.This is the case of the emulator..

2.In case of the real device you are executing the same app, and your are getting the null values, when you are appending the response on the form...

Now my questions :-

@ Was the server really called by the real device?
@ Was the server able to handle and process the request of the device client?
@ Was the server able to write the data to the client?

[gaurav.gupta]

@ raj

@ Was the server really called by the real device? Yes
@ Was the server able to handle and process the request of the device client? Yes
@ Was the server able to write the data to the client? Server is sending data but data is not being captured in string

Server is working fine and it sending data.
More over Let me tell you there are some 25 categories in which i have to fetch data from server.
If i fetch all categories in one step data is being sent from server but i dont know why it is NULL when printed on form in case of real device.
But if i fetch less categories let say 10 it appends data to form.

[raj_J2ME]

Which method of data communication are you using?
How are you reading the data and what is the size of the data that you are receiving when server is sending
categories?
May the data is going to lost on the client side, how are you storing the data?

[gaurav.gupta]

Which method of data communication are you using?
How are you reading the data and what is the size of the data that you are receiving when server is sending
categories?
May the data is going to lost on the client side, how are you storing the data?

The web service is made in .net and i have created a stub to connect and call its execute method which takes a string argument and returns a String.

I store data in RecordStore but the point is that i am not receving it despite of webservice sending it everytime.
What could be the reason when less data is sent it is captured and when large amount of data is sent it doesnot.

One more thing if data is not coming it should also not come in emulator. What i feel is String object is not able to hold large amount of data.

[raj_J2ME]

That's why I asked you in my last post.Kindly try to store the data in buffer or vector rather than the string.Then check the app, whether this can receive the total amount of data or not?

[gaurav.gupta]

That's why I asked you in my last post.Kindly try to store the data in buffer or vector rather than the string.Then check the app, whether this can receive the total amount of data or not?

Ok Sir

According to you i should use Streams.

[raj_J2ME]

Even currently you must be reading the data using the same..is'n it?

You keep on adding the data in the vector or buffer..

[gaurav.gupta]

Even currently you must be reading the data using the same..is'n it?

You keep on adding the data in the vector or buffer..

Actually i was doing like following

String response=service.execute(strToSend);

now i tried

StringBuffer bfrStr=null;
            byte[] arrBytes=service.execute(stringToSend).getBytes();
            
            if(arrBytes.length>0)
            {
                bfrStr=new StringBuffer(arrBytes.length);
                for(int i=0;i<arrBytes.length;i++)
                {
                    char c=(char)arrBytes[i];
                    bfrStr.append(c);
                }
            }
            
            if(bfrStr!=null)
            {
            println(bfrStr.toString());
            getResponse(bfrStr.toString());
            }

Now i am getting arrayIndexOutofBoundsException.

I think of using StreamReader will it be the right approach ?..

[raj_J2ME]

Where this is about..client or server?

[kumarv75]

Can anyone tell me how to add LWUIT to netbeans 6.8 ..........I have downloaded LWUIT from the official java website.........