The mkdir() function in java returning false. Why?
I am trying to create the folder archive under the following directory structure:
E:/preweb/CATest/DL/Zipra Internal/EventCompletion/html/archive/
using the boolean mkdir() function in java.
Though the folder archive does not exist under html folder, still the function is returning false.
Canm someone let me know why?
And you have checked that by using
File file =// E:/preweb/CATest/DL/Zipra Internal/EventCompletion/html/archive/
Sys.out.println( file.getParentFile().exists() );
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the InitCVIRTE function is not listed in the NIDAQ function reference online help? Why? and what does she do?and where can I find a description of this function? Can i use this function with visualc++ 6.0?
The InitCVIRTE function is in the CVI run time engine (cvirte.dll)..not part of NI-DAQ.
Applications written or using CVI may call this function..
How are you running into this ?
From the CVI help...
This function performs initialization of the CVI Run-Time Engine. It is needed only in executables or DLLs that are linked using an external compiler. Otherwise, it is harmless.
It should be called in your main, WinMain, or DllMain, function. The parameter values you should pass depend on which of these three functions you are calling InitCVIRTE from. The following examples show how to use InitCVIRTE in each case.
If you are using main, your code should be as follows.
int main (int argc, char *argv[])
if (InitCVIRTE (0, argv, 0) == 0)
return -1; /* out of memory */
/* your other code */
return 0;
If you are using WinMain, your code should be as follows.
int __stdcall WinMain (HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpszCmdLine,
int nCmdShow)
if (InitCVIRTE (hInstance, 0, 0) == 0)
return -1; /* out of memory */
/* your other code */
return 0;
If you are creating a DLL, you must call InitCVIRTE and CloseCVIRTE in your DllMain function, as in the following.
int __stdcall DllMain (void *hinstDLL, int fdwReason,
void *lpvReserved)
if (fdwReason == DLL_PROCESS_ATTACH)
if (InitCVIRTE (hinstDLL, 0, 0) == 0)
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/* your other ATTACH code */
else if (fdwReason == DLL_PROCESS_DETACH)
/* your other DETACH code */
CloseCVIRTE ();
return 1;
NOTE: The prototype for InitCVIRTE is in cvirte.h, not
utility.h.
NOTE: In CVI 4.0.1, this function was expanded from one to
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created using the one-parameter version of the function
will continue to work properly.
/*-------------------- Prototype ---------------------*/
int InitCVIRTE (void *HInstance, char *Argv[], void *Reserved);
Nandan Dharwadker
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How to call the DLL functions through Java
Hello,
I have already got a VC++ generated DLL. It has serveral functionalities. I need to call those functions from my Java Application. Now i know that it can be possible only through writing Java JNI Interfaces.
Everywhere i only see they give an example where in they tell to create an DLL. Now how do i will call if an DLL is ready and exists.
If anyone can give an example then it will be very helpful to me. Please mail me at [email protected] .
Thank you
vvpatroYou can't call functions in an arbitary DLL form Java. You need to use JNI to produce a 'wrapper' DLL that maps Java methods to the methods in the target DLL. The purpose of the wrapper is to allow type conversion between Java types and C/C++ types. The complexity of this task depends largely on the types used in th target DLL. If the targer DLL uses only primitive types such as char, byte, int, long, string, the translation is simple and the wrapper DLL will be 'thin'. If however, the target DLL passes arrays and objects, or employs callbacks, these more work to do, and the wrapper will be correspondingly 'thicker'.
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File.exists() returns false even when the file exists
hi,
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//Anders -
BufferedReader.ready() keeps returning false using JSSE 1.0.2/jdk 1.2.2
I'm running into difficulties reading a response data stream from a server via HTTPS. The SSL sets up fine (I can see both the client side and server side certificate chains, and the two sides can handshake and agree on a cipher (SSL_RSA_WITH_RC4_128_SHA in this case)). I get no errors getting the output or input streams from the socket, and the GET request seems to work (no errors reported by the PrintWriter), but in.ready() returns false, and the while loop exits immediately. But I know there is data available (I can paste the printed url into Netscape and get data back). Since this should not be all that complex once the SSL session is established, I'm probably missing something silly, Can someone tell me what it is please?
Thanks
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// code excerpt
// just finished printing the cipher suite, cert chains, etc
try{
out = new PrintWriter(
new BufferedWriter(
new outputStreamWriter(socket.getOutputStream() )));
} catch(Exception e) {
System.out.println("Error getting input and output streams from socket ");
System.out.println(e.getMessage());
e.printStackTrace();
throw(e);
try{ // time to submit the request and get the data
// build the URL to get
// tried constructing it here and nailing it up at declaration time - no difference
// path = "https://" + dlp.host + ":" + Integer.toString(dlp.port) + "/" +
// dlp.basePath + "?StartDate=" + longDateFmtURL.format(dlp.startDate) +
// "&EndDate=" + longDateFmtURL.format(dlp.endDate);
System.out.println("Sending request for URL" );
System.out.println(path);
out.println("GET " + path );
out.println();
out.flush();
* Make sure there were no errors
if (out.checkError()){
System.out.println("Error sending request to server");
throw(new IOException("Error sending request to server")
try{
in = new BufferedReader(
new InputStreamReader(
socket.getInputStream() ));
} catch(Exception e) {
System.out.println("Error getting input stream from socket ");
System.out.println(e.getMessage());
e.printStackTrace();
//System.exit(3);
throw(e);
if (!in.ready()) { // in.ready() keeps returning false
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ServletAuthentication.weak() makes isUserInRole() always return false
I have a problem with SSO and authentification. If I authenticate with the weak()
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If I try to "call" pages from the client the declerativ security-constraints also
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If I switch to using a j_sec_check form to authenticate the isUserInRole() works
fine. I can't use j_sec_check as a permanent solution though, because I need to
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Have any of you figured out a solution to this problem? Shouldn't isUserInRole()
work the same way regardless of if you logged in using SA.weak() or a j_security_check
form?Hi ,
If I switch to using a j_sec_check form to authenticate the isUserInRole()works
fine. I can't use j_sec_check as a permanent solution though, because Ineed to
do a lot of pre- and post- processing in the login/authenication process.You can use the j_security_check and still do the pre and post processing as
you want.
You have to following code,
package examples.servlets;
import java.io.PrintStream;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import weblogic.servlet.security.AuthFilter;
public class AuthFilterImpl extends AuthFilter
public AuthFilterImpl()
System.out.println("New AuthFilterImpl has been created.");
public void doPreAuth(ServletRequest servletrequest, ServletResponse
servletresponse)
System.out.println("AuthFilterImpl.doPreAuth has been called.");
System.out.println("Password is " +
servletrequest.getParameter("j_password"));
public boolean doSuccessAuth(ServletRequest servletrequest,
ServletResponse servletresponse)
System.out.println("AuthFilterImpl.doSuccessAuth has been called.");
return true;
public void doFailAuth(ServletRequest servletrequest, ServletResponse
servletresponse)
System.out.println("AuthFilterImpl.doFailAuth has been called.");
In your weblogic.xml have this entry,
<weblogic-web-app>
<auth-filter>
examples.servlets.AuthFilterImpl
</auth-filter>
</weblogic-web-app>
I am not sure about problem with SA.weak().
-utpal
"Morten" <[email protected]> wrote in message
news:[email protected]...
>
I have a problem with SSO and authentification. If I authenticate with theweak()
method(have tried alle of them) authentication works fine and it seem tobe single
signed-on, but
if we call the isUserInRole() method it always return false.
If I try to "call" pages from the client the declerativsecurity-constraints also
works fine preventing the user from accessing the pages. It is only whenwe use
the forward() method that we also use isUserInRole() to check if the useris permitted
to be forwarded(). WLS 6.1 sp2 tells us that the user is never in Role, nomatter
what, if we use the weak() method to authenticate.
If I switch to using a j_sec_check form to authenticate the isUserInRole()works
fine. I can't use j_sec_check as a permanent solution though, because Ineed to
do a lot of pre- and post- processing in the login/authenication process.
Have any of you figured out a solution to this problem? Shouldn'tisUserInRole()
work the same way regardless of if you logged in using SA.weak() or aj_security_check
form? -
Unsigned int - problem translating c++ function to java
OK so here's the deal:
I'm writing a client for a internet comunicator in java (J2ME to be precise). Unfortunately i have specs for this comunicator's protocol for c++ programing. The first problem I ran to is: I have to calculate a hash for a password so it doesn't go plain text on the network. The function in c++ that does this is:
int getPasswordHash(char *password, int seed){
unsigned int x=0, y=0, z=0;
char *pwd = password;
y = seed;
for (x = 0; *password; password++) {
x = (x & 0xffffff00) | *password;
y ^= x;
y += x;
x <<= 8;
y ^= x;
x <<= 8;
y -= x;
x <<= 8;
y ^= x;
z = y & 0x1f;
y = (y << z) | (y >> (32 - z));
cout << "Hash for \"" << pwd << "\" with seed \"" << seed << "\": " << y << "\n";
return y;
}My translation to java goes:
public int getPasswordHash(String password, int seed){
long x = 0, y = 0, z = 0;
int tmp = 0;
String pwd = password;
y = seed;
for (x = 0; x < password.length(); x++){
tmp = (int)x;
x = x | password.charAt(tmp);
y ^= x;
y = uintadd(y, x);
x <<= 8;
y ^= x;
x <<= 8;
y = uintsubst(y, x);
x <<= 8;
y ^= x;
z = y & 0x1f;
y = (y << z) | (y >> (32 - z));
x = tmp;
System.out.println("Hash for \""+ pwd + "\" with seed \"" + seed + "\": " + y);
return (int)y;
public long uintadd (long x, long y){
long xL = x & 0xffffffffL;
long yL = y & 0xffffffffL;
long sumL = xL + yL;
long sum = (sumL & 0xffffffffL);
return sum;
public long uintsubst (long x, long y){
long xL = x & 0xffffffffL;
long yL = y & 0xffffffffL;
long sumL = xL - yL;
long sum = (sumL & 0xffffffffL);
return sum;
}So I use the uintadd and uintsubst to add and substract values that should be unsigned int. Every operation works exactly like in c++ (I've checked) until this point:y = (y << z) | (y >> (32 - z));and to be exact (y << z) This doesn't turn out like in c++ so the whole function doesn't return the right vaule. I know it's because doing a bit operation on a unsigned int in c++ is different in than in java because unsigned variables have totally different bit values than signed ones. The question is: how to work this out. I managed to do aritmetic operations working but I have no idea how to deal with this. Any help would be great.I'm by no means the expert with this, but I'm going
to guess that this would work...
y = ((y << z) & 0xffffffffL) | (y >> (32 - z));
thus... to zero out the right shifted 1's before the
orWOW WOW WOW it totaly works thanks alot bsampieri !! -
DataLine isRunning() always returns false for mp3 files
Running JDK 1.5.0-b64 on Win 2K and XP. Using the sun mp3 plug-in. Everything works except the DataLine.isRunning() method always returns false.
For other file types (e.g. WAV) isRunning() returns true/false values as you might expect.
Anybody else have this experience? It seems like a bug to me.
Thank you.Running JDK 1.5.0-b64 on Win 2K and XP. Using the sun mp3 plug-in. Everything works except the DataLine.isRunning() method always returns false.
For other file types (e.g. WAV) isRunning() returns true/false values as you might expect.
Anybody else have this experience? It seems like a bug to me.
Thank you. -
Functionality of Java Gui Through Portal
I'm running an EP 6.0 SP2 implementation (patch 5) on an AIX environments.
Our JRE/Javagui deployment is working properly and it is loading the gui onto the end users machines once they hit a transactional iView.
My question is around the actual functionality of Java Gui.
I have been asked by several of our functional teams about a difference in funcctionality that apppears to exist. This difference is as follows.
In Windows Gui when you make a selection and select 'enter' the fields following the selection update based on the selection criterea. In Java Gui it appears that the user has to 1) make the selection, 2) click their cursor into the box where the selection appears and then hit enter to update the selection criterea.
Would someone please confirm that this is the way the Java Gui was meant to operate and if not suggest a way to eliminate the extra click in the operation.
Thanks
JamesHi James,
Sorry that I can't tell you how to get around this but wanted to let you know that there are differences in the Java Gui and the SAPGui in general. Since the Java Gui is a web based implementation and the SAPGui is a client application installed on the desktop, you will get these differences.
Not sure about Java Gui, but there are certain transactions you can't run at all from the WebGui for Microsoft browsers. So, you are more than likely stuck with what you have!
Hope this helps,
Andrew -
HTML form has: action="/TTFFRP/addlicense.rex" method="get" onsubmit="validate_data();"
validate_data is defined in tags:
function validate_data()
alert('in validate routine');
if (document.getElementById('custname').value == '')
alert('Customer name must not be blank; put in name of organization licensing File RePackager');
return false;
}Try posting at the Web Development / Standards Evangelism forum at MozillaZine. The helpers over there are more knowledgeable about web page development issues with Firefox.
[http://forums.mozillazine.org/viewforum.php?f=25]
You'll need to register and login to be able to post in that forum. -
In Javascript or PHP you can have a function that could return, for example, a string in case of success and false in case of failure.
I've noticed (in the few days I've been learning C#) that you need to define a type of value that the function will return, so you need to return that type of value but in case of failure you can't return false.
What is the best way to achieve this behavior and is there an example I can see?
Thank you in advance,
JuanJuan, be aware that returning null won't work with value types, such as an int, which can't be null. You'd have to use a nullable value type. A nullable int would be declared with a "?", such as:
int? someOtherFunction(int param)
if(something goes great)
return param * 42;
return null;
And you have to use it like this:
int? result = someOtherFunction(666);
if (result != null) // you can also use result.HasValue
// it worked, do something with the result
// if you're doing math with the result, no problem
int x = result * 2;
// but if you're assigning it to another an int, you need to use this syntax
int y = result.Value;
Before nullable value types came along, for a method that returned an int, I'd use a value of something that wouldn't normally be returned by that method to indicate failure, such as a -1.
~~Bonnie DeWitt [C# MVP]
That's something very very important to keep in mind. Can save you from a lot of headaches!
So if you have an int function and it might return NULL, if you are doing Math with the return value you can use it directly, but if you're assigning it to another variable you have to use .Value?
Thanks
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