Invoking java methods with labVIEW
I have a program written in LabVIEW and I want to invoke functions of another program written in java. How can i do this (I know very little C)? I have tried to make a DLL but this is not obvious without C.
Thanks in advance,
Beny
Hello!
I have never done this myself (worked with Java together with LabVIEW that is), but I found some useful information that hopefully will help you some.
First there is a KB that discusses this and you can read it here:
http://digital.ni.com/public.nsf/websearch/BEE812007BA2A9B486256BC80068A49A?OpenDocument
There are also two discussion threads that discusses this and you can read these here:
http://forums.ni.com/ni/board/message?board.id=170&message.id=44181&requireLogin=False
http://forums.ni.com/ni/board/message?board.id=170&message.id=97663&requireLogin=False
Hope this helps!
Regards,
Jimmie A.
Applications Engineer, National Instruments
Regards,
Jimmie Adolph
Systems Engineer Manager, National Instruments Northern Region
Bring Me The Horizon - Sempiternal
Similar Messages
-
Urgent please ! How to invoke java method with diffrent argument types?
Hi,
I am new to JNI.
I had gone through documentation but it is not of much help.
Can any one help me out how to invoke the below java method,
// Java class file
public class JavaClassFile
public int myJavaMethod(String[] strArray, MyClass[] myClassArray, long time, int[] ids)
// implementation of method
return 0;
// C++ file with Invokation API and invokes the myJavaMethod Java method
int main()
jclass cls_str = env->FindClass("java/lang/String");
jclass cls_MyClass = env->FindClass("MyClass");
long myLong = 2332323232;
int intArray[] = {232, 323, 32, 77 };
jclass cls_JavaClassFile = env->FindClass("JavaClassFile");
jmethodID mid_myJavaMethod = env->GetMethodID( cls_JavaClassFile, "myJavaMethod", "([Ljava/lang/String;[LMyClass;J[I)I");
// invoking the java method
//jint returnValue = env->CallIntMethod( cls_JavaClassFile, mid_myJavaMethod, stringArray, myClassArray, myLong, intArray ); --- (1)
//jint returnValue = env->CallIntMethodA( cls_JavaClassFile, mid_myJavaMethod, ...........); --- (2)
//jint returnValue = env->CallIntMethodV( cls_JavaClassFile, mid_myJavaMethod, ...........); --- (3)
Can any one tell me what is the correct way of invoking the above Java method of (1), (2) and (3) and how ?
The statement (1) is compilable but throws error at runtime, why ?
How can I use statements (2) and (3) over here ?
Thanks for any sort help.
warm and best regards.You are missing some steps.
When you invoke a java method from C++, the parameters have to be java parameters, no C++ parameters.
For example, your code appears to me as thogh it is trying to pass a (C++) array of ints into a java method. No can do.
You have to construct a java in array and fill it in with values.
Here's a code snippet:
jintArray intArray = env->NewIntArray(10); // Ten elments
There are also jni functions for getting and setting array "regions".
If you are going to really do this stuff, I suggest a resource:
essential JNI by Rob Gordon
There is a chapter devoted to arrays and strings. -
Invoking java methods from C/C++ on the machine with different JREs
I implemented Windows NT Service instantiating JVM and invoking several java methods. Everything works but I have an issue with running the service on the machine where multiple different versions of JRE have been installed. The service is calling java methods that require JRE 1.3 or later so I wrote the code that is setting system PATH from within the service based on the configuration stored in the external file. The problem is that the service requires jvm.dll to be in the PATH prior lunching it since this library is instantiated through the implicit linking. When I put jvm.dll in the same path as the service binary I can lunch it but JNI_CreateJavaVM fails and returns -1. This happens even if JRE 1.3 is in the system PATH prior lunching the service.
Everything works if the system PATH contains references to JRE 1.3 and jvm.dll is removed from the service's directory.
I am looking for an advice on what is the proper way to deal with invoking java methods from the C/C++ executable in the environment with different versions of JRE.
Thanks, Kris.Here's a way I have done what you are asking about:
What you want to do is make all of your linking happen at runtime, rather than at compile time. This way, you can edit the PATH variable before the jvm.dll gets loaded.
Following is some code that I used to handle a dll of my own in this manner. You can decide if you want to write a "wrapper" dll, or if you find it simpler to approach the jvm.dll in this way.
// Define pointer type for DLL entry point.
typedef void JREPDLL_API (*EXECUTEREQUEST)(char*, Arguments&);
// Set up path, load dll, and pass everything off to it.
HINSTANCE javaServer = javaServer = LoadLibrary("jrepdll.dll");
if (javaServer != NULL) {
EXECUTEREQUEST executeRequest = (EXECUTEREQUEST)GetProcAddress(javaServer, "ExecuteRequest");
if (executeRequest != NULL) {
if (argc == 1)
// Execute the request.
executeRequest("-run", args);
else
// Execute the request.
executeRequest("-console", args);
Here's some code for how to edit the PATH:
// Edit the PATH environment variable so that we use our private java.
char *appendPt;
char *newPath;
char *path;
char tmp[_MAX_PATH];
// Get the current PATH variable setting.
path = getenv("PATH");
// Allocate space for an edited path setting.
if (path != NULL)
newPath = (char*)malloc((_MAX_PATH * 2) + strlen(path));
else
newPath = (char*)malloc((_MAX_PATH * 2));
// Get upper part of path to desired directories.
strcpy(tmp, filepath);
appendPt = strstr(tmp, "dbin\\jreplicator");
appendPt[0] = '\0';
sprintf(newPath, "PATH=%sjava\\jre1.2.2\\bin;%sjava\\jre1.2.2\\bin\\classic", tmp, tmp);
// Append the value of the existing PATH environment variable.
// If there is anything, append it.
if (path != NULL) {
strcat(newPath, ";");
strncat(newPath, path, (sizeof(newPath) - strlen(newPath) - 2));
// Set new PATH value.
_putenv(newPath);
free(newPath); -
Invoking Custom Methods with MiniButtons Not Working
Hi Experts,
I followed the steps in the Siebel 7.8 doc exactly to invoke method with
miniButton, but it gave me error:
The specialized method 'MyTest' is not supported on Business Component
'Account' used by Business Object 'Account'.(SBL-DAT-00322)
The steps I copied from the doc shown below, is the doc wrong in certain
step or anything else I need to take care? I also checked the Siebel
SupportWeb about the error code, but didn't seem to solve this simple test
case.
Any help is appreciated!
Michelle
Invoking Custom Methods with MiniButtons
Be sure to set up Tools for the appropriate Target Browser Group.
To invoke a custom method with a MiniButton
1. Choose an applet (for example, Account List Applet) and create a
control with the following properties:
Name = ButtonTest
Caption = Test
HTML Type = MiniButton
Method Invoked = MyTest
2. Right click the Applet and choose Edit Web Layout.
The Web layout editor appears.
3. Change the template mode on the Web Controls toolbar to 3: Edit
List.
A window opens with the available controls, including the one you just
created.
4. Drag and drop the control the ButtonTest control onto an available
location. When you release the mouse button, the button appears.
5. Click Save and then choose File > Close.
6. To add a server script to the applet that enables the button,
right-click the applet and choose Edit Server Scripts. Add the following
script to the WebApplet_PreCanInvokeMethod() function.
function WebApplet_PreCanInvokeMethod (MethodName, &CanInvoke)
if ( MethodName == "MyTest" )
CanInvoke = "TRUE";
return( CancelOperation );
return (ContinueOperation);
7. Add the following browser script to the applet you are using (for
example, the Account List Applet).
function Applet_PreInvokeMethod (name, inputPropSet)
switch (name) {
case "MyTest":
alert( "Siebel 7 browser script!" );
return("CancelOperation");
break;
return ("ContinueOperation");
8. Run any application that has access to accounts, and go to the
Accounts screen.
The new button should appear.
9. Click Test.
The Browser Script should display an alert box indicating "Siebel 7
Browser Script!"Hi
As said above I have tried with Account List Applet and created a new control with MethodInvoked Property=Test; HTML Type=Button and added to the weblayout
2.Enable the new button on the applet
Applet--->Server Script
function WebApplet_PreCanInvokeMethod (MethodName)
if(MethodName=="Test")
CanInvoke="True";
return(CancelOperation);
return (ContinueOperation);
3.Applet--->BrowserScript---->
function Applet_PreInvokeMethod (name, inputPropSet)
if(name=="Test")
alert ("Your Result is success")
return ("ContinueOperation");
when clicked on button it was throwing following error:
Siebel Error Message SBL-DAT-00322: The specialized method is not supported on Business Component ' used by Business Object .
gone through support web and read possible reasons but I am not able to find out where I was wrong
I am using siebelV 7.7 ; Applet is using Class:"CSSFrameListBase". It is not a Copied applet.
Could you please suggest me.
Thank You, -
How can I access CAPI 2.0 methods with LabView ?
I must use CAPI 2.0 (common ISDN interface) method with LabView (graphical interface), the work is to command a ISDN S/T card on PXI Bus, and this card support CAPI 2.0.
This depends upon what type of interface you have to the ISDN. I assume you have either Basic Rate Interface (BRI) or Primary Rate Interface (PRI). Do you have a DLL to control it? If so, you can use the "Call Library Function Node" VI to access this DLL and just make calls to it. If you have an ActiveX Server, you can use the LabVIEW ActiveX Automation VIs to access it.
J.R. Allen -
hi
i have used flash builder 4.
i can't plugin eclipse ide.
can i invoke java methods in flash builder 4 .
is it possible.
if it's possible pls give some ideas.
thanks in advance
regards
athiIf you want to invoke java methods that are remote though, you might want to use a Java Remoting technology like BlazeDS.
Using a <s:RemoteObject> tag, you could connect to the server and invoke java methods.
Here is a small sample app code that helps me execute a remote java method.
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
creationComplete="ro.getProducts()">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.messaging.channels.AMFChannel;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
protected function ro_resultHandler(event:ResultEvent):void
Alert.show(event.result.toString())
protected function ro_faultHandler(event:FaultEvent):void
Alert.show(event.fault.faultString);
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
<s:RemoteObject id="ro"
destination="productService"
endpoint="http://localhost:8400/samples"
fault="ro_faultHandler(event)"
result="ro_resultHandler(event)"/>
</fx:Declarations>
</s:Application>
Hope this helps,
Balakrishnan V -
How do you invoke a method with native int array argument?
Hi,
Will someone help me to show me a few codes samples on how to invoke a method which has only one argument, an int [] array.
For exampe:
public void Method1(int [] intArray) {...};
Here is some simple code fragment I used:
Class<?> aClass = Class.forName("Test2");
Class[] argTypes = new Class[] {int[].class};
Method method = aClass.getDeclaredMethod("Method_1", argTypes);
int [] intArray = new int[] {111, 222, 333};
Object [] args = new Object[1];
args[0] = Array.newInstance(int.class, intArray);
method.invoke(aClass, args);I can compile without any error, but when runs, it died in the "invoke" statement with:
Exception in thread "main" java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at Test1.invoke_Method_1(Test1.java:262)
at Test1.start(Test1.java:33)
at Test1.main(Test1.java:12)
Any help is greatly appreciated!
JeffSorry, my bad. I was able to invoke static methods and instance methods with all data types except native int, short, double and float, not sure the proper ways to declare them.
After many frustrating hours, I posted the message for help, but at that time, my mind was so numb that I created a faulted example because I cut and pasted the static method invocation example to test the instance method passing int array argument.
As your post suggested, "args[0] = intArray;", that works. Thanks!
You know, I did tried passing the argument like that first, but because I was not declaring the type properly, I ended up messing up the actual passing as well as the instantiation step.
I will honestly slap my hand three times.
jml -
Rhino calling overloaded Java methods with Array parameters
Has anyone had any problems writing JavaScript code that calls overloaded Java methods?
I have two Java defined methods that differ in the arguments, one takes a string the other takes an array of strings. The problem is calling Java methods within the JavaScript always calls the method with the String argument...
/* Java Code Here */
public void function(String s) { /* Function A */ }
public void function(String[] sa) { /* Function B */ }
/* JavaScript Code Here */
param = java.lang.reflect.Array.newInstance(java.lang.String, 2);
param[0] = "test";
param[1] = "test2";
stringParam = "test3";
/* Both function calls below end up calling the Function A from above */
function(param);
function(stringParam);PS...in case you're not familiar with Rhino,
It is a mozilla package that embeds a JavaScript interpreter within a Java application...
http://www.mozilla.org/rhino/haha...I can't even find my other thread :(
Sorry about the double post...I'll go look for my other thread now -
hi
i want to exicute a small java script code in to labview, so please help me for thisYou can do this through .NET interface, it is very complicated.
Google : .NET DLR javascript
You can call .NET methods from labview and there is an existing DLR implementation of javascript. The least to vapour is IronJS.
Download the libraries, force labview use the .NET 4.0 or higher and try to use it.
Since you mentioned "small javascript", much less painfull would be to rewrite it in labview. If you are trying to mimic some javascript code online you didnt develop, you can use tools to breakpoint and probe it by tools in browsers. Firefox has firebug. I used it when I was converting a very difficult mathematic conversion between C and javascript. -
hello, I hope you can help me.
In the moment I am trying to use Global Hotkeys.
I am able to register global Hotkeys from Java in C++. My problem: I can't invoke an other java method as result of pressing my hotkey.
void OnHotKey(void *)
printf("invoke my java method");
so I want to do a backcall to java in a c++ method. At Beginning Java registers my global Hotkeys in an c++ native method.(My JNI is rusty, and the tutorial is gone),
Something like (Pusdo code, see JNI Spec: Accessing Fields and Methods ):
JNIEnv * g_env, jobject g_obj;
void OnHotKey(void *)
// cut from the example posted above
jclass cls;
jmethodID mid;
cls = (*env)->FindClass(env,"my.Class");
if( cls == NULL ) {
return;
mid=(*env)->GetMethodID(env, cls, "onHotKey", "()V");
(*env)->CallVoidMethod( obj, mid );
CHotkeyHandler hk;
JNIEXPORT void JNICALL Java_gui_Gui_activateGlobalHotkeys
(JNIEnv * env, jobject obj) {
int err, id;
hk.RemoveHandler(id = 0);
hk.InsertHandler(MOD_CONTROL | MOD_ALT, 'A', OnHotKey, id);
// We need this in OnHotKey
g_env = env;
g_obj = obj;
err = hk.Start("calc.exe");
if (err != CHotkeyHandler::hkheOk)
printf("Error %d on Start()\n", err);
JNIEXPORT void JNICALL Java_gui_Gui_deactivateGlobalHotkeys
(JNIEnv * env, jobject obj) {
int err = hk.Stop();
} -
How to invoke Java method from C++
Hi
My requirement is In C++ we are having three different structures, like
struct one{
int accontno;
char * accountholdername;
long balance;
struct two{
int startdate;
int enddate;
struct three{
char* userid;
char* userpassword;
from c++ how to pass these structures, these structures I have to read in Java class, and in java how receive these structures.
And the sample methods will be like: getCarsData(Input, output, Error);
How do i call the method in JNI, if it is static int method we can call like
getStaticIntMethodID(), instead of int if i have to pass the above mentioned structures how do i do? Should i create an object array in JNI for accessing these three structures?
Suggestions/Samples welcome
Thanks,Why did you start another thread for this?
I was answering you in the [url http://forum.java.sun.com/thread.jspa?threadID=712137&messageID=4119725#4119725]old thread and you didn't even bother to answer back my (basic) questions.
I told you to use the code tags when pasting code. Got ignored. I also gave you a starting example on how to achieve your goal. Flushed.
Oh well, I'm getting used to it.
Again.
Before starting, allways keep near you the [url http://java.sun.com/j2se/1.5.0/docs/guide/jni/spec/jniTOC.html]JNI reference. All the JNI functions are documented in it.
First you need to create custom Java classes that will match the C++ stucts (remember?).
There is no magic wand in JNI that will transform the C++ structs into the custom Java classes and vice versa.
You'll have to code it by hand, one field at a time. It's a pain.
So for the one, two, three C++ structs (why not posting some real names instead of this crap?),
there will be JOne, JTwo and JThree Java classes.
There is also that other Java class already existing with getCarsData() static method that will fetch the data.
And finally the DLL function wich will call this Java static method, doing the bridge between the C++ structs and the custom Java classes, finally return the data.
Due to the lack of explanation from your posts, I will say that the getCarsData() static method receives a parameter of type JOne
and returns an array of JTwo objects.
So the get_cars_data() DLL function receives a parameter which is a struct one and
returns a pointer to an array of struct two elements.
// C++ structs
struct one {
int accontno;
char * accountholdername;
long balance;
struct two {
int startdate;
int enddate;
struct three {
char * userid;
char * userpassword;
// custom Java classes
class JOne {
int accontno;
String accountholdername;
int balance;
class JTwo {
int startdate;
int enddate;
class JThree {
String userid;
String userpassword;
// Java class with static method that gets the data
class DataFetcher {
static JTwo[] getCarsData(JOne one) {
// DLL function
// struct 'one' parameter is already filled with values.
// Returns an array of 'two' C++ struct obtained from a Java static method
two * get_cars_data(one o) {
JNIEnv * env;
/** not show here is the code to either
create the JVM or
attach it to the current thread **/
// get the data from 'one' C++ struct and put it in a new instance of JOne Java class
jclass oneCls = env->FindClass("JOne");
jmethodID oneCtorID = env->GetMethodID(oneCls, "<init>", "()V");
jfieldID accontnoID = env->GetFieldID(oneCls, "accontno", "I");
jfieldID accountholdernameID = env->GetFieldID(oneCls, "accountholdername", "Ljava/lang/String;");
jfieldID balanceID = env->GetFieldID(oneCls, "balance", "I");
jobject oneObj = env->NewObject(oneCls, oneCtorID);
env->SetIntField(oneObj, accontnoID, o.accontno);
env->SetObjectField(oneObj, accountholdernameID, env->NewStringUTF((const char *)o.accountholdername));
env->SetIntField(oneObj, balanceID, o.balanceo);
// call the Java static method
jclass dfCls = env->FindClass("DataFetcher");
jmethodID getCarsDataID = env->GetStaticMethodID(dfCls, "getCarsData", "(LJOne;)[LJTwo;");
jobjectarray twoArray = (jobjectarray)env->CallStaticObjectMethod(dfCls, getCarsDataID, oneObj);
// create the 'two' C++ struct array from the Java array of JTwo objects
jclass twoCls = env->FindClass("JTwo");
jfieldID startdateID = env->GetFieldID(twoCls, "startdate", "I");
jfieldID enddateID = env->GetFieldID(twoCls, "enddate", "I");
jint len = env->GetArrayLength(twoArray);
two * pt = new two[len];
for (int i = 0; i < len; i++) {
jobject twoObj = env->GetObjectArrayElement(twoArray, i);
pt.startdate = env->GetIntField(twoObj, startdateID);
pt[i].enddate = env->GetIntField(twoObj, enddateID);
// return the resulting 'two' C++ struct array
return pt;
Regards -
Invoking Java Methods from outside ODI
Is there a good blog on how to do this, I assume a procedure is the best way?
Bos that makes sense and seems to work, I put this into my text variable:
SELECT
CAST(COLLECT(to_char(trade_id)) AS oditmp.t_varchar_tab) AS trade_id
FROM oditmp.trade_ids
Validated and returned this when I checked the history :
Date Value Context
2011-07-01 08:33:01.0 oracle.sql.ARRAY@294d7bc DEVELOPMENT
I assume the values are loaded in here and I can modify my Java Code as below?
In SQL Developer the same query returns:
ODITMP.T_VARCHAR_TAB(1,2,3,4,5,6)
-- Change to Java:
// Declare variables
import jar_jcmf;
trade_ids String;
String [] str_arr;
jar_jcmf t = new jar_jcmf();
int n;
// Load string array of table values, NOT SURE ABOUT THIS STEP
trade_ids = #PRJCT.TRADE_IDS;
// Split String
str_arr = trade_ids.split(",");
// Loop over array and execute GetTrade method from JCMF Class
for (String rec : str_arr) {
n = Integer.parseInt(rec)
t.getTrade(n);
}; -
Trouble invoking Axis service with multiple parameters
Hallo Java experts,
I have a problem with Axis 1.2RC2 (and Tomcat 5.0.19, JDK 1.5, Win XP) that might be quite simple, but I'm not so experienced and running out of ideas.
Everything works fine as long as I use a single Parameter. But I can't invoke service methods with more parameters, independent of the parameters' (simple) types! Different exceptions are thrown, depending on the way I invoke the service. It's either ...
- a java.lang.IllegalArgumentException (case 1)
"Tried to invoke method public java.lang.String test.server.TestSoapBindingImpl.printLongs(long,long) with arguments java.lang.Long,null. The arguments do not match the signature."
- or an org.xml.sax.SAXException (case 2)
"SimpleDeserializer encountered a child element, which is NOT expected, in something it was trying to deserialize."
Here's an example of a simple web service, that takes two longs and should return a string. In case 1 the service is invoked using a service locator in case 2 with a 'Call' object and explicitly set parameter types.
Thanks in advance for your help!
Dave
service[b]
public class TestSoapBindingImpl implements test.server.Test{
public String printLongs(long long_1, long long_2){
return "long_1 = " +long_1 +", long_2 = " +long_2;
[b]case 1
client
public class TestClient {
public static void main (String[] args) throws Exception {
TestService service = new TestServiceLocator();
Test testProxy = service.gettest();
long longVal = 1L;
response = testProxy.printLongs(longVal, longVal);
System.out.println(response);
SOAP messsage
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<in6 xmlns="urn:TestNS">1</in6>
<in7 xmlns="urn:TestNS">1</in7>
</soapenv:Body>
</soapenv:Envelope>
Axis' log file
Part of the log, where only the first argument of 'printLongs' is properly converted before the exception is thrown.
17886 org.apache.axis.utils.JavaUtils
- Trying to convert java.lang.Long to long
17886 org.apache.axis.i18n.ProjectResourceBundle
- org.apache.axis.i18n.resource::handleGetObject(value00)
17886 org.apache.axis.providers.java.RPCProvider
- value: 1
17886 org.apache.axis.i18n.ProjectResourceBundle
- org.apache.axis.i18n.resource::handleGetObject(dispatchIAE00)
17986 org.apache.axis.providers.java.RPCProvider
- Tried to invoke method public java.lang.String test.server.TestSoapBindingImpl.printLongs(long,long) with arguments java.lang.Long,null. The arguments do not match the signature.
java.lang.IllegalArgumentException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:384)
at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:281)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:319)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:450)
at org.apache.axis.server.AxisServer.invoke(AxisServer.java:285)
at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:653)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:301)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
case 2
client
public class TestClient2
public static void main(String [] args) {
try {
String endpoint =
"http://localhost:1234/axis1.2rc2/services/test";
Service service = new Service();
Call call = (Call) service.createCall();
call.setTargetEndpointAddress( new java.net.URL(endpoint) );
call.setOperationName(new QName("urn:TestNS", "printLongs") );
call.addParameter("in6",
org.apache.axis.Constants.XSD_LONG,
javax.xml.rpc.ParameterMode.IN);
call.addParameter("in7",
org.apache.axis.Constants.XSD_LONG,
javax.xml.rpc.ParameterMode.IN);
call.setReturnType(org.apache.axis.Constants.XSD_STRING);
String response = (String) call.invoke( new Object[] { 1L, 1L } );
System.out.println(response);
} catch (Exception e) {
System.err.println(e.toString());
SOAP messsage
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<ns1:printLongs soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="urn:TestNS">
<in6 href="#id0"/>
<in7 href="#id0"/>
</ns1:printLongs>
<multiRef id="id0" soapenc:root="0" soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xsi:type="xsd:long" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/">1</multiRef>
</soapenv:Body>
</soapenv:Envelope>
Exception
AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: org.xml.sax.SAXException: SimpleDeserializer encountered a child element, which is NOT expected, in something it was trying to deserialize.
faultActor:
faultNode:
faultDetail:
{http://xml.apache.org/axis/}stackTrace:org.xml.sax.SAXException: SimpleDeserializer encountered a child element, which is NOT expected, in something it was trying to deserialize.
at org.apache.axis.encoding.ser.SimpleDeserializer.onStartChild(SimpleDeserializer.java:143)
at org.apache.axis.encoding.DeserializationContext.startElement(DeserializationContext.java:1031)
at org.apache.axis.message.SAX2EventRecorder.replay(SAX2EventRecorder.java:165)
at org.apache.axis.message.MessageElement.publishToHandler(MessageElement.java:1140)
at org.apache.axis.message.RPCElement.deserialize(RPCElement.java:238)
at org.apache.axis.message.RPCElement.getParams(RPCElement.java:386)
at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:148)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:319)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:450)
at org.apache.axis.server.AxisServer.invoke(AxisServer.java:285)
at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:653)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:301)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
....Dave, not sure if you still are looking for an answer but i hate seeing unreplied posts so i felt i needed to post something. I'm just beginning with this stuff as well so take my suggestions with a grain of salt....or a beer. Anyways, case 2 would show that you are getting your parameters through properly because the "deserialization" errror is targetted towards the soap reply. Most likely you are trying to receive back a none primitive type. :-D i.e. such as the problem that i'm having.
hope that helps somewhat.
graeme. -
How to pass a JavaScript variable into a java method
I would like to know how to pass a JavaScript variable into a java method with in a <% %> tag inside a JSP file like so:
<%@ page contentType="text/html;charset=windows-1252"%>
<html>
<head>
<script LANGUAGE="JavaScript">
myValue = someDynamicValue;
<% System.out.println(myValue)%>
</script>
</head>
<body>
</body>
</html>
obviously "System.out.println(myValue)" will not work because myValue is seen as a java variable and not a JavaScript variable.
I would like to know how to let the jsp file, that I wrote in the above code, see myValue as a JavaScript variable and not a java variable so that I can pass it to a java method.
NOTE: the java method does not have to be a println() method, it can be any method of my choice.
NOTE: someDynamicValue is a JavaScript value that can dynamically changeI don't believe you can. JSPs are really just elaborate templates that an engine such as Tomcat parses and generates an HTML page based on. That page is then displayed to the user. By the time you want to use some function in Javascript, the JSP has already been parsed and generated.
Basically, Javascript and JSPs can't talk to each other. One's server-side and the other is client-side. -
Java method call from c passing string more info
I am trying to call a java method from c passing a String as an argument.
my C code is as follows.
//Initalise jstring and class (to recieve String)
jstring textp;
jclass texts = (*env)->GetObjectClass(env, obj);
jmethodID text = (*env)->GetMethodID(env, texts, "texture", "([Ljava/lang/String;)V");
//Create a new jstring from the char* texturePath (in textures)
//call the java method with the jstring
textp = (*env)->NewStringUTF(env,ret.textures->texturePath);
(*env)->CallVoidMethod(env, obj, text,textp);
//java code
// texture which recieves a string
public void texture(String texturePath){
The error I get is as follows:
SIGSEGV 11 segmentation violation
si_signo [11]: SEGV
si_errno [0]:
si_code [1]: SEGV_MAPERR [addr: 0xc]
stackpointer=FFBED790
"Screen Updater" (TID:0x4f9060, sys_thread_t:0x4f8f98, state:CW, thread_t: t@11, threadID:0xf2d31d78, stack_bottom:0xf2d32000, stack_size:0x20000) prio=4
[1] java.lang.Object.wait(Object.java:424)
[2] sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java:78)
[3] sun.awt.ScreenUpdater.run(ScreenUpdater.java:98)
"AWT-Motif" (TID:0x40be50, sys_thread_t:0x40bd88, state:R, thread_t: t@10, threadID:0xf2d71d78, stack_bottom:0xf2d72000, stack_size:0x20000) prio=5
[1] sun.awt.motif.MToolkit.run(Native Method)
[2] java.lang.Thread.run(Thread.java:479)
"SunToolkit.PostEventQueue-0" (TID:0x431950, sys_thread_t:0x431888, state:CW, thread_t: t@9, threadID:0xf2e71d78, stack_bottom:0xf2e72000, stack_size:0x20000) prio=5
[1] java.lang.Object.wait(Object.java:424)
[2] sun.awt.PostEventQueue.run(SunToolkit.java:407)
"AWT-EventQueue-0" (TID:0x430ea8, sys_thread_t:0x430de0, state:CW, thread_t: t@8, threadID:0xf3071d78, stack_bottom:0xf3072000, stack_size:0x20000) prio=6
[1] java.lang.Object.wait(Object.java:424)
[2] java.awt.EventQueue.getNextEvent(EventQueue.java:212)
[3] java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:100)
[4] java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:91)
[5] java.awt.EventDispatchThread.run(EventDispatchThread.java:83)
Exiting Thread (sys_thread_t:0xff343db0) : no stack
"Finalizer" (TID:0x154e98, sys_thread_t:0x154dd0, state:CW, thread_t: t@6, threadID:0xfe391d78, stack_bottom:0xfe392000, stack_size:0x20000) prio=8
[1] java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:146)
[2] java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:168)
[3] java.lang.ref.Finalizer$FinalizerWorker$FinalizerThread.run(Finalizer.java:124)
"Reference Handler" (TID:0x1506a0, sys_thread_t:0x1505d8, state:CW, thread_t: t@5, threadID:0xfe3c1d78, stack_bottom:0xfe3c2000, stack_size:0x20000) prio=10
[1] java.lang.Object.wait(Object.java:424)
[2] java.lang.ref.Reference$ReferenceHandler.run(Reference.java:130)
"Signal dispatcher" (TID:0x13d180, sys_thread_t:0x13d0b8, state:MW, thread_t: t@4, threadID:0xfe3f1d78, stack_bottom:0xfe3f2000, stack_size:0x20000) prio=10
"main" (TID:0x38918, sys_thread_t:0x38850, state:R, thread_t: t@1, threadID:0x25228, stack_bottom:0xffbf0000, stack_size:0x800000) prio=5 *current thread*
[1] loader.Callbacks.nativeMethod(Native Method)
[2] loader.Callbacks.main(Callbacks.java:184)
[3] graphics.GR_MakeTrack.init(GR_MakeTrack.java:60)
[4] graphics.GR_MakeTrack.main2(GR_MakeTrack.java:49)
[5] graphics.GR_MakeTrack.main(GR_MakeTrack.java:41)
[6] control.GE_main.GE_main1(GE_main.java:87)
[7] control.GE_main.main(GE_main.java:66)
gmake: *** [run] Abort (core dumped)I am trying to call a java method from c passing a
String as an argument.
my C code is as follows.
//Initalise jstring and class (to recieve String)
jstring textp;
jclass texts = (*env)->GetObjectClass(env, obj);
jmethodID text = (*env)->GetMethodID(env, texts,
"texture", "([Ljava/lang/String;)V");
Hi Pete,
your problem is that the method texture you are trying to find does not exist. If you look carefully at your declaration of the method signature in the GetMethodID call you will see "([Ljava/lang/String;)V" which is trying to find a method that accepts a String array as its parameter. Remove the [ from the method signature and it should work ok. You might want to test text (jmethodID) for NULL or 0 before trying to call it as well.
Maybe you are looking for
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