Calling java from scripting

Hello,
I would like to integrate some scripting capability in my web application.
The main purpose is to cover the following scenario :
- I develop a web app with JSP technology, packaged in a MyAPP.WAR file containing my application and another file (MyCustomer.RAR?) containing installation specific informations. I want the MyApp.WAR to be the same for all my customers, just having the RAR file specific to each customer (installation).
- In this ressource file, there could be some scripting functions that will be called from my JSP Pages to change the default presentation with some customer particular informations.
Those informations would be extracted from my java data model. The purpose is to enable the customer to code some little script, and to avoid coding those in Java.
The question I have on that are :
1/ is it possible to call java instances from scripting language (I read on apache that the answer was yes for some of them), but I would like to know if javascript can do that.
2/ Can I recover the "result" of the script in JSP ?
An example :
1/ The class containing a marvellous property
class MyClass {
public String myProperty;
2/ The JSP page :
<stlLib:callScript(Customer.RAR, "ScriptToCall",anInstance) />
<stlLib:getResult ???>
3/ A user script (pseudo-code)
Customer 1 :
Function ScriptToCall(object) {
variable iwanttoshowsquareroot;
iwanttoshowsquareroot = squareroot(object.myProperty);
return iwanttoshowsquareroot ;
Customer 2 :
Function ScriptToCall(object) {
variable mychoiceisdifferent;
mychoiceisdifferent= object.myProperty / 2;
return mychoiceisdifferent;
According to what ScriptToCall looks like the result on page would be different
Thanks in advance for your advises
Olivier.

1) The script will be running in the browser, not the server, yes? So in Netscape you can load Java objects via Javascript, but IE doesn't seem to support this. Although in either, you can call methods on an applet in the page. But you can't call a JS function from the Java code in the JSP page, since that is only executed on the server.
2) Only if the "result" is submitted back to the server.

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Hi,
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I am trying to call java from vb via ActiveX Bridge and I am running into problems. I would appreciate any help.
I am using Visual Basic 2010 express, and Java JDK 1.6.0_16. I have used the http://download.oracle.com/javase/1.4.2/docs/guide/beans/axbridge/developerguide/index.html page as a guideline. To try to make it work I took the following steps:
1. Wrote a very simple java class (below):
package xxx;
import java.io.Serializable;
public class axb implements Serializable {
public int get_axb_Handle() {
int Address = 12345678;
return Address;
2. After I compiled, and created the jar file. I built the dll using the following command:
"C:\Program Files\Java\jdk1.6.0_16\bin\packager" -out "C:\Program Files\Java\jdk1.6.0_16\jre\axbridge\bin" E:\axb\dist\axb.jar xxx.axb
3. I then registered using: regsvr32 axb.dll
4. In Visual Basic Express IDE I use Project -> Add Reference to add Iterop.axb (dump below), and axb namespace
5. In my basic code I use the following lines
Dim axb1 As axb.axb
axb1 = New axb.axb <== Crash here with AccessViolationException ( full exception below)
What am I missing? Any help would be greatly appreciated
Thanks
Iterop.axb partial dump
___[MOD] C:\Documents and Settings\Elie A. Cohen.USINC022\My Documents\Visual Studio 2010\Projects\Repo API Example\Repo API Example\obj\x86\Release\Interop.axb.dll
| M A N I F E S T
|___[NSP] axb
| |___[INT] axb.axb
| | | .class interface public abstract auto ansi import /*02000006*/
| | | implements axb.axbDispatch/*02000003*/
| | | implements axb.axbSource_Event/*02000005*/
| | | .custom /*0C000018:0A000001*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.GuidAttribute/*01000002*/::.ctor(string) /* 0A000001 */ = ( 01 00 24 34 45 36 44 30 44 41 38 2D 36 41 45 44 // ..$4E6D0DA8-6AED ...
| | | .custom /*0C000019:0A000007*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.CoClassAttribute/*01000009*/::.ctor(class [mscorlib/*23000001*/]System.Type/*01000007*/) /* 0A000007 */ = ( 01 00 0C 61 78 62 2E 61 78 62 43 6C 61 73 73 00 // ...axb.axbClass. ...
| |
| |___[CLS] axb.axbClass
| | | .class public auto ansi import /*02000004*/
| | | implements axb.axbDispatch/*02000003*/
| | | implements axb.axb/*02000006*/
| | | implements axb.axbSource_Event/*02000005*/
| | | .custom /*0C00000F:0A000008*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.ClassInterfaceAttribute/*0100000A*/::.ctor(int16) /* 0A000008 */ = ( 01 00 00 00 00 00 ) ...
| | | .custom /*0C000010:0A000009*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.ComSourceInterfacesAttribute/*0100000B*/::.ctor(string) /* 0A000009 */ = ( 01 00 0F 61 78 62 2E 61 78 62 53 6F 75 72 63 65 // ...axb.axbSource ...
| | | .custom /*0C000011:0A000001*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.GuidAttribute/*01000002*/::.ctor(string) /* 0A000001 */ = ( 01 00 24 43 44 42 46 36 42 33 33 2D 45 32 33 46 // ..$CDBF6B33-E23F ...
| | | .custom /*0C000012:0A000002*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.TypeLibTypeAttribute/*01000003*/::.ctor(int16) /* 0A000002 */ = ( 01 00 02 00 00 00 ) ...
| | |___[MET] method .ctor : void()
| | |___[MET] method equals : bool(object)
| | |___[MET] method getClass : object()
| | |___[MET] method get_axb_Handle : int32()
| | |___[MET] method hashCode : int32()
| | |___[MET] method notify : void()
| | |___[MET] method notifyAll : void()
| | |___[MET] method toString : string()
| | |___[MET] method wait : object(object,object)
AccessViolationException exception
System.AccessViolationException was unhandled
Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source=mscorlib
StackTrace:
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at WindowsApplication1.Form1.getPatientHandle_Click(Object sender, EventArgs e) in C:\Documents and Settings\Elie A. Cohen.USINC022\my documents\visual studio 2010\Projects\Repo API Example\Repo API Example\Repo API Example.vb:line 13
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at WindowsApplication1.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:

In case you haven't figured it out already... Or if anyone else is curious... Or for myself when I get old and forgetful...
h2. Object Creation
For starters, when you create an ActiveX object from within VB, use:
Set myObject = CreateObject("JavaObject.Bean")When I refer to JavaObject.Bean, I'm meaning the full object name + ".Bean". So, in your case, you should use:
Set myObject = CreateObject("xxx.axb.Bean")h2. Location
The .dll file must be located in the JRE that is used at the time of calling. Meaning, the .dll file must be placed under <jre_home>\axbridge\bin and registered there.
In your case:
DLL:
C:\Program Files\Java\jre6\axbridge\bin
Jar:
C:\Program Files\Java\jre6\axbridge\libh4. A Note:
The only supported JRE is a 32bit version as far as I know with regards to the ActiveX bridge. Just like the packager.exe can only be found in the 32bit JDK.
h2. Methods
h3. Object Types
ActiveX Bridge does not support passing literals or arrays. However, it does support passing java's primitive data types as Objects.
Simply meaning:
h4. Invalid:
public int get_axb_Handle() {
     int Address = 12345678;
     return Address;
}h4. Valid:
public Integer get_axb_Handle() {
     int Address = 12345678;
     return Address;
}On a normal circumstance, there's little difference between the two methods. However, in the second example, the JVM does a typecast from a literal data type to a object data type, resulting in a valid object to pass through to Visual Basic. Now, obviously there are multiple ways to do a proper change, new Integer(int) for example. It doesn't matter to me. At the end of the day, you have to pass an object.
As a side note, the same idea applies when receiving data from Visual Basic.
h4. Invalid:
public void set_axb_Handle(int newHandle) {
     int Address = newHandle;
}h4. Valid:
public void set_axb_Handle(Integer newHandle) {
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ResourceBundle throws MissingResourceException when calling Java from C

All,
Our code calls Java from C application.
The C code create JVM using JNI_CreateJavaVM. Due to internal design issues we don't
create the JVM with a "-classpath" option.
After creating the JVM, we create a ClassLoader (URLClassLoader), with a URL list as it's classpath.
The last step in the C code is to load a Java class using the C reference to URLClassLoader.loadClass
(I will refer to this class as classA), and than call one of it's static methods.
Please notice that classA is not instantiated, we call a static method.
At this point we are moving to the Java code...
In the Java static method we call ResourceBundle.getBundle("resources.messages"),
the result is ResourceBundle throws MissingResourceException.
- The JAR hosting "resources/messeges.properties" (refer as jarA) is include in the
ClassLoader URL paths we used for loading the Java class.
- Using a debugger we can see that ClassLoader.getSystemClassLoader() don't contain
jarA in it's URL list.
- Using the debugger we see that classA.class.getClassLoader() does contain
jarA in it's URL list.
After some investigation we see that ResourceBundle.getBundle calles to ResourceBundle.getLoader:
private static ClassLoader getLoader() {
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        if (cl == null) {
            cl = ClassLoader.getSystemClassLoader();
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I suspect the problem raised in the above code. Since I couldn't get a debug
version of rt.jar for Solaris, I need some help.
Our environment is Solaris 8, Java 1.5.
Please note that the same code works fine on WindowsXP with the same Java version!
Thanks,
Avi

I was thinking JVM should the classpath when it is invoked. But obviously it is not and we need to assign the classpath ourselves when invoking from native side. Thanks for pointing that out. For other people's benefit the following is the code piece I for initializing JVM.
char* str1;
          char* str2;
          char* classpath;
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               exit(1);
          m_VmArgs.version = JNI_VERSION_1_4;
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          m_VmArgs.options = m_options;
          m_VmArgs.nOptions = 1;
          m_VmArgs.ignoreUnrecognized = JNI_TRUE;
          JNI_GetDefaultJavaVMInitArgs(&m_VmArgs);
          /* Create the Java VM */
          m_Res = JNI_CreateJavaVM(&m_Jvm, (void**)&m_Env, &m_VmArgs);
          if (m_Res < 0) {
               printf("Can't create JVM\n");
               exit(1);
thanks,
chancellor

Questions abt. calling Java from C

I have a java class that contains a method I need to make accessable to C functions. It looks something like this:
public class ExportName
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Thanks!

If that is the case, then your starting point is not javah, but to investigate the invocation API, after which you will call java methods from C.
Well, the Invocation API is mostly orthogonal to whether you are calling Java from C or vice versa. The Invocation API is mostly about creating/destroying VMs. You can call Java methods from a flat C application or you can call Java methods from C from within Java native methods.
If you want to call Java from C, you need to use the methods you're using like GetMethodID, CallXXXMethod, etc...
In your particular example, if you wanted to call ExportName.getName(), you would use CallObjectMethod. You would cast the result to a jstring, and then use GetStringUTFChars, ReleaseStringUTFChars, etc...
God bless,
-Toby Reyelts
For a solution to all your JNI woes, check out Jace - http://jace.reyelts.com/jace

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I have recently come across certain projects where Java has being used as an alternative for scripting purposes. What I am trying to say here is that making calls to java programs from csh scripts and these Java programs are merely doing trivial/sql tasks which could have very well been carried out in a scripting language itself. and then Java calling some scripts so ending up with a chain of Java calling scripts which call Java and so on.
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Edited by: kilyas on Mar 25, 2010 2:52 PM

>
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If you're finding it too hard to test scripts, like perhaps there are too many different flows of execution through the script, it's worth considering whether the task-at-hand is really a scripting job at all. The sweet spot for scripts is gluing together the stuff that performs all the complex logic.
What are the best practices recommendations for such a scenario, I am sure there much be something about it or some pattern or anti pattern dealing with it and some review of such an implementation. Don't you think so?I hope so! I've been tasked with documenting a scripting standard written by another developer, finding references to cite and such-like. There do exist coding standards on the web for scripting, shouldn't be too hard to find something useful. As for reviews, I expect simple peer review by someone else who knows scripting is about as good as it's going to get.
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Calling java from python

Hi,
I am trying to call java methods from a python script. Jython is not an option. I have looked at using Jpype. Below is my code thus far:
Jpype.py
from jpype import *
startJVM("C:\Program Files\Java\jdk1.6.0_12\jre\bin\client", "-ea", "-Djava.class.path=%s" % classpath)
com =JPackage("CallJavaFromPython")
jp = com.Jpype1()
jp.printArgument("XXX")
shutdownJVM()
================================================== =
Jpype1.class
package CallJavaFromPython;
public class Jpype1 {
public static void main(String args[]){
System.out.println(args[0]);
public void printArgument(String arg){
System.out.println(arg);
================================================== =
Error message i am getting when I try to run the python script is :
NameError: name 'startJVM' is not defined
has anyone come across this before?
Thanks in advance...

hofsoc wrote:
The most recent release of Jython does not support above Python 2.3. There is a beta version released but it is not possible for me to use this. Otherwise it would be perfect.Ok, that's a drag. Any chance you can use an earlier version of Python?

Calling Java from OMB Plus

I have a number of OMB Scripts which import/export etc.. Within this script I capture the password from the user so that I can connect to the repository. I found a new class in the latest java which will mask this password and I want to use this within my TCL Script. From what I've read you should be able to call Java Classes from a TCL Script however it gives me a java.lang.reflect.InvocationTargetException
error. Any help you would be appreciated. (Error at bottom of post)
Thanks
Sean
I've included the Call and the class below.
Within my tcl script
package require java
set t [ java::new finance.ombpass ]
set owbreppass [$t run]
JAVA ombpass.Java
(The Class file ombpass.class in contained in the folder "finance" located under
oracle\product\owb\10204\owb\bin\admin\)
The TCL Source is being called after performing a cd to that directory.
package finance;
import java.io.Console;
public class ombpass{
          public String run() {
               Console cons = System.console();
               char [] pswd = cons.readPassword("Password: ");
               String s = new String(pswd);
               System.out.println(s);
     return s;
ERROR THROWN...
java.lang.reflect.InvocationTargetException
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:324)
at Launcher.main(Launcher.java:167)
Caused by: java.lang.UnsupportedClassVersionError: finance/ombpass (Unsupported major.minor version 50.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:282)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at tcl.lang.TclClassLoader.loadClass(TclClassLoader.java:148)
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at tcl.lang.Parser.evalObjv(Parser.java:818)
at tcl.lang.Parser.eval2(Parser.java:1221)
at tcl.lang.Parser.evalTokens(Parser.java:1001)
at tcl.lang.Parser.eval2(Parser.java:1208)
at tcl.lang.Procedure.cmdProc(Procedure.java:161)
at tcl.lang.Parser.evalObjv(Parser.java:818)
at tcl.lang.Parser.eval2(Parser.java:1221)
at tcl.lang.Interp.eval(Interp.java:2189)
at tcl.lang.Interp.eval(Interp.java:2273)
at tcl.lang.SwitchCmd.cmdProc(SwitchCmd.java:141)
at tcl.lang.Parser.evalObjv(Parser.java:818)
at tcl.lang.Parser.eval2(Parser.java:1221)
at tcl.lang.Procedure.cmdProc(Procedure.java:161)
at tcl.lang.Parser.evalObjv(Parser.java:818)
at tcl.lang.Parser.eval2(Parser.java:1221)
at tcl.lang.Interp.eval(Interp.java:2189)
at tcl.lang.Interp.evalFile(Interp.java:2368)
at tcl.lang.SourceCmd.cmdProc(SourceCmd.java:75)
at tcl.lang.Parser.evalObjv(Parser.java:818)
at tcl.lang.Parser.eval2(Parser.java:1221)
at tcl.lang.Interp.eval(Interp.java:2189)
at tcl.lang.Interp.eval(Interp.java:2273)
at tcl.lang.Interp.recordAndEval(Interp.java:2328)
at tcl.lang.TclConsoleThread$2.processEvent(TclShell.java:424)
at tcl.lang.Notifier.serviceEvent(Notifier.java:444)
at tcl.lang.Notifier.doOneEvent(Notifier.java:585)
at tcl.lang.TclShell.run(TclShell.java:170)
at tcl.lang.TclShell.run(TclShell.java:68)
at oracle.owb.scripting.OMBShell.main(OMBShell.java:38)
... 5 more
java.lang.reflect.InvocationTargetException

Besides "package require java", you also need to "java import" your class into TCL. For example, this is how I implemented my OMB-SQL package:
package require java
# PVCS Version Information
#/* $Workfile:   omb_sql_library.tcl $ $Revision:   2.3 $ */
#/* $Author:   michael.broughton $
#/* $Date:   16 Dec 2008 10:10:36 $ */
proc oracleConnect { serverName databaseName portNumber username password } {
   # import required classes
   java::import java.sql.Connection
   java::import java.sql.DriverManager
   java::import java.sql.ResultSet
   java::import java.sql.SQLWarning
   java::import java.sql.Statement
   java::import java.sql.CallableStatement
   java::import java.sql.ResultSetMetaData
   java::import java.sql.DatabaseMetaData
   java::import java.sql.Types
   java::import oracle.jdbc.OracleDatabaseMetaData
   # load database driver .
   java::call Class forName oracle.jdbc.OracleDriver
   # set the connection url.
   append url jdbc:oracle:thin
   append url :
   append url $username
   append url /
   append url $password
   append url "@"
   append url $serverName
   append url :
   append url $portNumber
   append url :
   append url $databaseName
   set oraConnection [ java::call DriverManager getConnection $url ]
   set oraDatabaseMetaData [ $oraConnection getMetaData ]
   set oraDatabaseVersion [ $oraDatabaseMetaData getDatabaseProductVersion ]
   puts "Connected to: $url"
   puts "$oraDatabaseVersion"
   return $oraConnection
proc oracleDisconnect { oraConnect } {
$oraConnect close
proc oraJDBCType { oraType } {
#translation of JDBC types as defined in XOPEN interface
set rv "NUMBER"
switch $oraType {
     "0" {set rv "NULL"}
     "1" {set rv "CHAR"}
     "2" {set rv "NUMBER"}
     "3" {set rv "DECIMAL"}
     "4" {set rv "INTEGER"}
     "5" {set rv "SMALLINT"}
     "6" {set rv "FLOAT"}
     "7" {set rv "REAL"}
     "8" {set rv "DOUBLE"}
     "12" {set rv "VARCHAR"}
     "16" {set rv "BOOLEAN"}
     "91" {set rv "DATE"}
     "92" {set rv "TIME"}
     "93" {set rv "TIMESTAMP"}
     default {set rv "OBJECT"}
return $rv
proc oracleQuery { oraConnect oraQuery } {
   set oraStatement [ $oraConnect createStatement ]
   set oraResults [ $oraStatement executeQuery $oraQuery ]
   # The following metadata dump is not required, but will be a helpfull sort of thing
   # if ever want to really build an abstraction layer
   #set oraResultsMetaData [ $oraResults getMetaData ]
   #set columnCount        [ $oraResultsMetaData getColumnCount ]
   #set i 1
   #puts "ResultSet Metadata:"
   #while { $i <= $columnCount} {
   #   set fname [ $oraResultsMetaData getColumnName $i]
   #   set ftype [oraJDBCType [ $oraResultsMetaData getColumnType $i]]
   #   puts "Output Field $i Name: $fname Type: $ftype"
   #   incr i
   # end of metadata dump
   return $oraResults
proc run_exec_template { oraConnect rtOwner locName taskType taskName {custParms ""} {sysParms ""} } {
    #   rt_owner      := e.g. MY_RUNTIME      - Name of the Runtime Repository Owner
    #   location_name :- e.g. MY_WAREHOUSE    - Physical Name of the Location to which this task was deployed
    #                                           (i.e. a DB Location or a Process Location or the Platform Schema)
    #                                           Note: Always use "PlaformSchema" for SQL_LOADER and SAP types.
    #   task_type     :- PLSQLMAP             - OWB PL/SQL Mapping
    #                 | SQLLOADERCONTROLFILE - OWB SQL*Loader Mapping
    #                 | PROCESSFLOW          - OWB ProcessFlow
    #                 | ABAPFILE             - OWB SAP Mapping
    #                 | DATAAUDITOR          - OWB DataAuditor Mapping
    #                 | SCHEDULEDJOB         - OWB Scheduled Job
    #   task_name     :- e.g. MY_MAPPING      - Physical Name of the Deployed Object. This can be optionally qualified
    #                                           by the name of a deployed parent, such as the Processflow Package name
    #                                           of a Processflow. A module name cannot be used here because it is not
    #                                           a deployable object.
    #   system_params :- { , | (name = value [, name = value]...)}
    #                    e.g. ","
    #                    or   MY_PARAM=1,YOUR_PARAM=true
    #   custom_params :- { , | (name = value [, name = value]...)}
    #                    e.g. ","
    #                    or   MY_PARAM=1,YOUR_PARAM=true
    # RETURNS
    #   1 if task reports SUCCESS, 2 if WARNING, 3 if ERROR
    set oraStmt [ $oraConnect createStatement ]
    set tmpRslt [ $oraStmt execute "alter session set current_schema=$rtOwner" ]
    set tmpRslt [ $oraStmt execute "set role owb_o_$rtOwner" ]
    set tmpRslt [ $oraStmt execute "set role owb_d_$rtOwner" ]
    set callString "declare x number; begin x := wb_rt_api_exec.run_task('$rtOwner','$locName','$taskType','$taskName','$custParms','$sysParms'); end;"
    set oraCall [ $oraConnect prepareCall $callString ]
    #$oraCall registerOutParameter { 1 java.lang.Integer int} {4 java:lang:Integer int}
    #$oraCall setString 2 $rtOwner
    #$oraCall setString 3 $locName
    #$oraCall setString 4 $taskType
    #$oraCall setString 5 $taskName
    #$oraCall setString 6 $sysParms
    #$oraCall setString 7 $custParms
    $oraCall execute
    #set retVal [$oraCall getInt 1]
    #set back to the default schema
    set oraDatabaseMetaData [ $oraConnect getMetaData ]
    set oraUser [$oraDatabaseMetaData getUserName]
    set tmpRslt [ oraStmt execute "alter session set current_schema=$oraUser" ]
# SAMPLE CODE to run a quick query and dump the results. #
#set oraConn [ oracleConnect myserver orcl 1555 scott tiger ]
#set oraRs [ oracleQuery $oraConn "select name, count(*) numlines from user_source group by name" ]
#for each row in the result set
#while {[$oraRs next]} {
#grab the field values
# set procName [$oraRs getString name]
# set procCount [$oraRs getInt numlines]
# puts "Program unit $procName comprises $procCount lines"
#$oraRs close
#oracleDisconnect $oraConnI do not know if you will need to play with classpaths or anything to get a successfull import as I never tried to do anything with custom classes. Oracle also has a demo example of integrating java with OMB+ to create modal dialogs which might provide additional guidance. It is available here: http://www.oracle.com/technology/sample_code/products/warehouse/files/owb_params.html
Good luck with it!

How to Call Java from ABAP

Hi all,
I have installed JCO & created the RFC in SAP. i have used below code to test my RFC connection & it's working fine.
But In the below report, where to call the JAVA Program & what code i should use to call java code .
Actually my ABAP requirement is to download a file. Then i need to call JAVA program, inside ABAP, to encrypt the downloaded file. Here, Java program is used to encrypt the file. Now question is, how to call the Java program inside the ABAP code. Please advice with the code sample. Thanks a lot.
REPORT z_jco_test.
PARAMETERS: requtext LIKE sy-lisel.
DATA: echotext LIKE sy-lisel,
      resptext LIKE sy-lisel,
      rfctest TYPE TABLE OF rfctest,
      wa_rfctest TYPE rfctest.
wa_rfctest-rfcdata1 = requtext.
wa_rfctest-rfcdata2 = 'Hello World'.
APPEND wa_rfctest TO rfctest.
CALL FUNCTION 'RFC_PING'
DESTINATION 'JCO'.
CALL FUNCTION 'STFC_CONNECTION'
DESTINATION 'JCO'
EXPORTING
    requtext = requtext
IMPORTING
    echotext = echotext
    resptext = resptext
TABLES
    rfctest = rfctest.
WRITE: 'Echo Text: ', echotext.
WRITE: 'Response Text: ', resptext.
LOOP AT rfctest INTO wa_rfctest.
WRITE: / 'rfcdata1: ', wa_rfctest-rfcdata1.
WRITE: / 'rfcdata2: ', wa_rfctest-rfcdata2.
ENDLOOP.

Hi,
You might accomplish your goal using external operating system commands.
1) Define in SM69 an external command, letu2019s say ZJAVA. This command will execute a script on the operating system, letu2019s call it calljava.sh.
2) In script calljava.sh you just call java, passing some parameters. For example, java $1 $2 $3 $4 $5 $6 $7
3) In your ABAP program you call the ZJAVA external command and pass parameters to it. Of course, one of the parameters must be your Java program name.
CALL FUNCTION 'SXPG_COMMAND_EXECUTE'
    EXPORTING
      commandname                   = l_command
      additional_parameters         = l_param
      trace                         = 'X'
    IMPORTING
      status                        = l_status
      exitcode                      = l_exitcode
    TABLES
      exec_protocol                 = l_exec_protocol_itab
    EXCEPTIONS
      no_permission                 = 1u2026

Calling java from XSLT

Hi All,
I am trying to call java method from XSLT file. It works fine on stand alone when I use Simple Transformation java program for transformation, but the same code is throwing exception in weblogic application server.
Please help me on this issue.
Exception:
ERROR: The first argument to the non-static Java function 'getRev' is not a valid object reference.
FATAL ERROR: 'Could not compile stylesheet'
javax.xml.transform.TransformerConfigurationException: Could not compile stylesheet
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:828)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:617)
     at weblogic.transaction.internal.ServerTransactionImpl.globalRetryCommit(ServerTransactionImpl.java:2737)
at weblogic.transaction.internal.ServerTransactionImpl.globalCommit(ServerTransactionImpl.java:2657)
at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(ServerTransactionImpl.java:285)
at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransactionImpl.java:233)
at weblogic.ejb.container.internal.BaseRemoteObject.postInvoke1(BaseRemoteObject.java:621)
at weblogic.ejb.container.internal.StatelessRemoteObject.postInvoke1(StatelessRemoteObject.java:60)
at weblogic.ejb.container.internal.BaseRemoteObject.postInvokeTxRetry(BaseRemoteObject.java:441)
at com.agile.pc.cmserver.change.ChangeSessionBean_3rbfzs_EOImpl.processWorkflowExtensions(ChangeSessionBean_3rbfzs_EOImpl.java:10838)
at com.agile.pc.cmserver.base.CMRouteSessionBean.changeStatus(CMRouteSessionBean.java:960)
at com.agile.pc.cmserver.base.CMRouteSessionBean.changeStatus(CMRouteSessionBean.java:898)
at com.agile.pc.cmserver.base.CMRouteSessionBean.changeStatus(CMRouteSessionBean.java:888)
at com.agile.pc.cmserver.change.ChangeSessionBean_3rbfzs_EOImpl.changeStatus(ChangeSessionBean_3rbfzs_EOImpl.java:12050)
at com.agile.ipa.pc.CMRoute.changeStatus(CMRoute.java:705)
at com.agile.ui.pcm.common.RouteHandler.changeStatus(RouteHandler.java:1747)
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:597)
at com.agile.ui.web.action.ActionServlet.invokeMethod(ActionServlet.java:1067)
at com.agile.ui.web.action.ActionServlet.handleRequest(ActionServlet.java:672)
at com.agile.ui.web.action.ActionServlet.doPost(ActionServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.agile.ui.pcm.common.filter.RemoteFSRequestFilter.doFilter(RemoteFSRequestFilter.java:148)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.agile.ui.web.filter.LoggingFilter.doFilter(LoggingFilter.java:108)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.agile.ui.pcm.common.filter.WebClientLog.doFilter(WebClientLog.java:78)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.jspbook.GZIPFilter.doFilter(GZIPFilter.java:21)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.agile.ui.pcm.common.filter.SSOTicketFilter.doFilter(SSOTicketFilter.java:89)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3592)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2202)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2108)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1432)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
XSLT sample code:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:pl="com.oracle.test.Sample" version="2.0">
     <xsl:template match="/">
          <xsl:variable name="rev" select="'02'" />
          <xsl:variable name="msg" select="pl:getRev($rev)" />
          <xsl:element name="result">
               <xsl:value-of select="$msg" />
          </xsl:element>
     </xsl:template>
</xsl:stylesheet>
Sample.java :
package com.oracle.test;
import java.io.*;
public class Sample {
     public static String getRev(String rev) {
          // some logic i am going include here
          if (rev.equals("01")) {
               return "valid one";
          return "";
Thanks All,

ERROR: The first argument to the non-static Java function 'getRev' is not a valid object reference.Because it results in this error rather than anything else, you have to verify (apart from typos) the actual files finally deployed to run that your method getRev is declared "static", and that the argument $rev is setup with select="'02'" and not select="02". (What you posted looks fine, just make sure it remains the same in those essential aspect.)

ClassDefNotFound error when calling Java from C++

Hi all,
I have a problem with calling my java from C++ through JNI.
I have set my CLASSPATH environment varible that include path to every libary that I need. My source is as follows:
#include <jni.h>
#include <stdio.h>
int main()
     JNIEnv               *env;
     JavaVM               *jvm;
     JavaVMInitArgs     vm_args;
     jint               res;
     jclass               cls;
     jmethodID          mid;
IMPORTANT: specify vm_args version # if you use JDK 1.1.2 and beyond
     vm_args.version = JNI_VERSION_1_4;
     vm_args.ignoreUnrecognized = JNI_TRUE;
     JNI_GetDefaultJavaVMInitArgs(&vm_args);
     /* Create the Java VM */
     res = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
     if (res < 0) {
          printf("Can't create JVM\n");
          return 1;
     cls = (env)->FindClass ("dds/test/comm/listeners/NACKListenerFrame");
     if (cls == 0)     {
          printf("Can't find NACKListenerFrame Class\n");
          return 1;
mid = (env)->GetStaticMethodID(cls, "start", "()V");
     if (mid == 0)     {
          printf("Can't find NackListnerFrame.start \n");
          return 1;
     (env)->CallStaticVoidMethod((_jclass*)cls, (_jmethodID*)mid, NULL);
     jthrowable e = (env)->ExceptionOccurred();
     if (e)     {
          env->ExceptionDescribe();
          env->ExceptionClear();
     if ((jvm)->DestroyJavaVM() < 0)     {
          printf("Cannot destroy JVM./n");
     return 0;
I deliberately left out the codebelow because I want the JVM I created to load Classes from the system's CLASSPATH variable as I have set path to every classes that I need, in that CLASSPATH variable.
JavaVMOption     options[1];
options[0].optionString=
"-Djava.class.path=.;E:/DDSproject/DDSImplementation/classes";
vm_args.options = options;
vm_args.nOptions = 1;
But it seems like unless I specify CLASSPATH in my C++ source code the JVM could not find any classes.
I tried to put the "jvm.dll" path to the first one in the System's PATH variable. It does not work either...
Gurus Pls help!!!.. I don't know what to do... I don't wanna code my CLASSPATH in my c++ source code as above.
Thanks in advance,
chancellor

I was thinking JVM should the classpath when it is invoked. But obviously it is not and we need to assign the classpath ourselves when invoking from native side. Thanks for pointing that out. For other people's benefit the following is the code piece I for initializing JVM.
char* str1;
          char* str2;
          char* classpath;
          str1 = "-Djava.class.path=";
          str2 = std::getenv("CLASSPATH");
          classpath = (char*)malloc(strlen(str1) + strlen(str2) + 1);
          strcpy(classpath, str1);
          strcat(classpath, str2);
          if (str2 == NULL)     {
               printf("CLASSPATH environment variable is not defined.");
               exit(1);
          m_VmArgs.version = JNI_VERSION_1_4;
          m_options[0].optionString= classpath;
          m_VmArgs.options = m_options;
          m_VmArgs.nOptions = 1;
          m_VmArgs.ignoreUnrecognized = JNI_TRUE;
          JNI_GetDefaultJavaVMInitArgs(&m_VmArgs);
          /* Create the Java VM */
          m_Res = JNI_CreateJavaVM(&m_Jvm, (void**)&m_Env, &m_VmArgs);
          if (m_Res < 0) {
               printf("Can't create JVM\n");
               exit(1);
thanks,
chancellor

Calling Java from BPEL

Hi,
Is WSIF still the best/recommend way to call java code from your BPEL? Or are we moving away from that kind of env. and should put a wrapper around the legacy java code and expose them as services?
Regards,
Muasir

hi,
Java can't call BPEL directly. So you have following steps:
1. Create Web Service from existing java file(Some tools can generate Web Service from java class).
2. Generate the Service Proxy by using Web Service.
3. Invoke the Web Service through proxy.
4. If your application use the struts, you can invoke the process from struts action class, which is called from a web page.
Maybe it is useful for you!

Calling java from scripting

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