Asynchronous function calls in Java?

I need to write a class whose functions i could call asynchronously. How do we do this? Is this part of the Java API or do i need something else?
Thank you in advance.

I am actually very surprised that this is not part of
the regular API. I always thought this would be built
into the languageLet's see...
C, Objective-C, C++, C#, Perl, Basic, Pascal, Fortran, Cobol, Forth, Algol, Snobol, Lisp, Smalltalk, SQL, JavaScript, VBScript, PerlScript, Plato(sp?), a number of script languages on different OSes and a number of mini-languages as well...
And not a single one that provides anything for doing asynchronous method calls.
So it doesn't surprise me that Java doesn't have it.
Now there might be some experimental language that does this but main stream languages do not.
Of course most of those languages do provide a way to start a thread and add processing logic to it. Although some of the ones I used did not even do that.

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I'm just starting to learn JNI and my problem is that I don't know if it is possible to call a C function calling a Java Method (or doing anything else with JNI) from another C function.
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Is all that possible ?
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Hard to understand the question, but by most interpretations the answer is going to be yes.
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BAPI function call in Java

Hi,
I am trying to make BAPI function call in JAVA. I am using the following libraries for IBM AIX version and the sapjco.jar
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Hi Jawed,
when I try it as a stand alone java code on IBM AIX version BAPI connection works and it fetches the roles listed for an user from the ACTIVITYGROUP table.
The same piece of code bundled in an ear and when deployed in SAP netweaver portal gives different errors. My sapjco.jar is in application lib folder and it is referred in classpath
first time when i access the application url it gives me
Error Details: java.lang.ExceptionInInitializerError: JCO.classInitialize():
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Application error occurred during request processing.
Details:   java.lang.NoClassDefFoundError: com.sap.mw.jco.JCO (initialization failure)
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package com.mysap.sso;
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import java.util.List;
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Duration of an Abap Function call from Java using Jco3

Hi guys!
I would like to use this discussion to get some refernces of the duration Timespan of an RFC call from Java to SAP. At the moment, i need at last about 200ms to call the Abap function. I'm just using one simple import and export parameter (so no deep structures). I think that the reason for my poor performance is, that the Java Tool and the SAP instance are not in the same network. So, i hope some of you have some data, how fast an RFC call from Java using Jco can be executed.
greetings, Hannes

Hi Hannes,
I think you have already got the answer to your question - the network set-up you have is probably the bottleneck. Whenever I've worked with Java <-> ABAP and they are in the same network, I've had no performance problems at all.
Does your RFC contain any complex logic or business processes? Are you able to try and call something that does nothing, say it just accepts an input string and returns it straight away as an export. Do you have any scope for testing with your Java tool on the same network as the SAP system?
Cheers,
G.

Function calling the java code

I have a java code that returns the size of the file name. I have created a pl/sql function that calls the method in the java class.
The problem I face is , when I try to call the function using the command "CALL f_size('C:\Batch\Query.sql')into :leng " , the error comes reporting that
"No method func in class fSize ".
I have given both the java& pl/sql code. Can anyone help me out?
import java.io.*;
public class fSize {
public static long func(String s)
File file = new File(s);
long length = file.length();
return length;
create or replace function f_size(path varchar2) return number
as language java
name 'fSize.func(String) return java.lang.Long';

What version of the database are you runnning?
If Oracle 9.2 or later, no need for java code. Use UTL_FILE.FGETATTR procedure.
FGETATTR Procedure
This procedure reads and returns the attributes of a disk file.
Syntax
UTL_FILE.FGETATTR(
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Parameters
Table 95-24 FGETATTR Procedure Parameters
Parameters Description
location
Directory location of the source file, a DIRECTORY_NAME from the ALL_DIRECTORIES view (case sensitive)
filename
The name of the source file to be copied
exists
A BOOLEAN for whether or not the file exists
file_length
The length of the file in bytes. NULL if file does not exist.
blocksize
The file system block size in bytes. NULL if the file does not exist.
SQL> create or replace and compile java source named "fSize" as
2 import java.io.*;
3 public class fSize {
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5      {
6          File file = new File(s);
7          long length = file.length();
8          return length;
9      }
10 };
11 /
Java created.
SQL> show errors
No errors.
SQL> create or replace function f_size(path varchar2) return number
2 as language java
3 name 'fSize.func(java.lang.String) return java.lang.Long';
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With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production
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Hi all,
I'm developing a JSP application (powered by Tomcat 4.0.1 in JDK 1.3, in Eclipse 3.3). Among other stuff I have 3 classes interacting with an Oracle database, covering 3 use cases - renaming, adding and deleting an database object. The renaming class simply updates the database with a String variable it receives from the request object, whereas the other two classes perform some calculations with the request data and update the database accordingly.
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java.lang.VerifyError: (class: action/GliederungNewAction, method: insertNewNode signature: (Loracle/jdbc/driver/OracleConnection;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V) Incompatible object argument for function call
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:120)
     at action.ActionMapping.perform(ActionMapping.java:53)
     at ControllerServlet.doResponse(ControllerServlet.java:92)
     at ControllerServlet.doPost(ControllerServlet.java:50)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
...The renaming works fine though. I have checked mailing lists and forums as well as contacted the company's java support but everything I have tried out so far, from exchanging the xerces.jar files found in JDOM and Tomcat to rebuidling the project didn't help.
I just can't explain to myself why this error occurs and I don't see how some additional Java code in the other 2 classes could cause it?
I realize that the Tomcat and JDK versions I'm using are totally out of date, but that's company's current standard and I can't really change that.
Here's the source code. I moved parts of the business logic from Java to Oracle recently but I left the SQL statements that the Oracle stored procedures are executing if it helps someone.
package action;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.StringTokenizer;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import oracle.jdbc.driver.OracleConnection;
* This class enables the creation and insertion of a new catalogue node. A new node
* is always inserted as the last child of the selected parent node.
public class GliederungNewAction implements Action {
     public String perform(ActionMapping mapping, HttpServletRequest request,
               HttpServletResponse response) {
          // fetch the necessary parameters from the JSP site
          // the parent attribute is the selected attribute!
          String parent_attribute = request.getParameter("attr");
          String catalogue = request.getParameter("catalogue");
          int parent_sequenceNr = Integer.parseInt(request.getParameter("sort_sequence"));
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          HttpSession session = request.getSession();
          db.SessionConnection sessConn = (db.SessionConnection) session.getAttribute("connection");
          if (sessConn != null) {
               try {
                    sessConn.setAutoCommit(false);
                    OracleConnection connection = (OracleConnection)sessConn.getConnection();
                    int lastPosition = getLastNodePosition( getLastChildAttribute(connection, catalogue, parent_attribute) );
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                    // calculate the sequence number
                    int precedingSequenceNumber = getPrecedingSequenceNumber(connection, catalogue, parent_attribute);
                    if ( precedingSequenceNumber == -1 ) {
                         precedingSequenceNumber = parent_sequenceNr;
                    int sortSequence = precedingSequenceNumber + 1;
                    setSequenceNumbers(connection, catalogue, sortSequence);
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                    insertNewNode(connection, catalogue, newNodeAttribute, parent_attribute, "Neuer Punkt", sortSequence);
                    connection.commit();
               } catch(SQLException ex) {
                    ex.printStackTrace();
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      * Creates, fills and executes a prepared statement to insert a new entry into the specified table, representing
      * a new node in the catalogue.
     private void insertNewNode(OracleConnection connection, String catalogue, String attribute, String parent_attribute, String description, int sortSequence) {
          try {
               String callAddNode = "{ call fasi_lob.pack_gliederung.addNode(:1, :2, :3, :4, :5) }";
               CallableStatement cst;
               cst = connection.prepareCall(callAddNode);
               cst.setString(1, catalogue);
               cst.setString(2, attribute);
               cst.setString(3, parent_attribute);
               cst.setString(4, description);
               cst.setInt(5, sortSequence);
               cst.execute();
               cst.close();
          } catch (SQLException e1) {
               // TODO Auto-generated catch block
               e1.printStackTrace();
//          String insertNewNode = "INSERT INTO vstd_media_cat_attributes " +
//                    "(catalogue, attribute, parent_attr, description, sort_sequence) VALUES(:1, :2, :3, :4, :5)";
//          PreparedStatement insertStmt;
//          try {
//               insertStmt = connection.prepareStatement(insertNewNode);
//               insertStmt.setString(1, catalogue);
//               insertStmt.setString(2, attribute);
//               insertStmt.setString(3, parent_attribute);
//               insertStmt.setString(4, description);
//               insertStmt.setInt(5, sortSequence);
//               insertStmt.execute();
//               insertStmt.close();
//          } catch (SQLException e) {
//               e.printStackTrace();
      * This method returns the attribute value of the last child of the parent under which
      * we want to insert a new node. The result set is sorted in descending order and only the
      * first result (that is, the last child under this parent) is fetched.
      * If the parent node has no children, "parent_attr.0" is returned.
      * @param connection
      * @param catalogue
      * @param parent_attribute
      * @return attribute of the last child under this parent, or "parent_attr.0" if parent has no children
     private String getLastChildAttribute(OracleConnection connection, String catalogue, String parent_attribute) {
          String queryLastChild = "SELECT attribute FROM vstd_media_cat_attributes " +
                                        "WHERE catalogue=:1 AND parent_attr=:2 ORDER BY sort_sequence DESC";
          String lastChildAttribute;
          PreparedStatement ps;
          try {
               ps = connection.prepareStatement(queryLastChild);
               ps.setString(1, catalogue);
               ps.setString(2, parent_attribute);
               ResultSet rs = ps.executeQuery();
               /* If a result is returned, the selected parent already has children.
                * If not set the lastChildAttribute to parent_attr.0
               if (rs.next()) {
                    lastChildAttribute = rs.getString("attribute");
               } else {
                    lastChildAttribute = parent_attribute.concat(".0");
               rs.close();
               return lastChildAttribute;
          } catch (SQLException e) {
               e.printStackTrace();
               return null;
      * This helper method determines the position of the last node in the attribute.
      * i.e for 3.5.2 it returns 2, for 2.1 it returns 1 etc.
      * @param attribute
      * @return position of last node in this attribute
     private int getLastNodePosition(String attribute) {
          StringTokenizer tokenizer = new StringTokenizer(attribute, ".");
          String lastNodePosition = "0";
          while( tokenizer.hasMoreTokens() ) {
               lastNodePosition = tokenizer.nextToken();
          return Integer.parseInt(lastNodePosition);
      * This method calculates the attribute of a node being inserted
      * by incrementing the last child position by 1 and attaching the
      * incremented position to the parent.
      * @param parent_attr
      * @param lastPosition
      * @return attribute of the new node
     private String createNewNodeAttribute(String parent_attr, int lastPosition) {
          String newPosition = new Integer(lastPosition + 1).toString();
          return parent_attr.concat("." + newPosition);
      * This method checks if the required sequence number for a new node is already in use and
      * handles the sequence numbers accordingly.
      * If the sequence number for a new node is NOT IN USE, the method doesn't do anything.
      * If the sequence number for a new node is IN USE, the method searches for the next free
      * sequence number by incrementing the number by one and repeating the query until no result
      * is found. Then all the sequence numbers between the required number (including, >= relation)
      * and the nearest found free number (not including, < relation) are incremented by 1, as to
      * make space for the new node.
      * @param connection
      * @param catalogue
      * @param newNodeSequenceNumber required sequence number for the new node
     private void setSequenceNumbers(OracleConnection connection, String catalogue, int newNodeSequenceNumber) {
          // 1. check if the new sequence number exists - if no do nothing
          // if yes - increment by one and see if exists
          //           repeat until free sequence number exists
          // when found increment all sequence numbers freeSeqNr > seqNr >= newSeqNr
          String query = "SELECT sort_sequence FROM vstd_media_cat_attributes " +
                    "WHERE catalogue=:1 AND sort_sequence=:2";
          PreparedStatement ps;
          try {
               ps = connection.prepareStatement(query);
               ps.setString(1, catalogue);
               ps.setInt(2, newNodeSequenceNumber);
               ResultSet rs = ps.executeQuery();
               // if no result, the required sequence number is free - nothing to do
               if( rs.next() ) {
                    int freeSequenceNumber = newNodeSequenceNumber;
                    do {
                         ps.setString(1, catalogue);
                         ps.setInt(2, freeSequenceNumber++);
                         rs = ps.executeQuery();
                    } while( rs.next() );
                    // increment sequence numbers - call stored procedure
                    String callUpdateSeqeunceNrs = "{ call fasi_lob.pack_gliederung.updateSeqNumbers(:1, :2, :3) }";
                    CallableStatement cst = connection.prepareCall(callUpdateSeqeunceNrs);
                    cst.setString(1, catalogue);
                    cst.setInt(2, newNodeSequenceNumber);
                    cst.setInt(3, freeSequenceNumber);
                    cst.execute();
                    cst.close();
//                    String query2 = "UPDATE vstd_media_cat_attributes " +
//                                      "SET sort_sequence = (sort_sequence + 1 ) " +
//                                      "WHERE catalogue=:1 sort_sequnce >=:2 AND sort_sequence <:3";
//                    PreparedStatement ps2;
//                    ps2 = connection.prepareStatement(query2);
//                    ps2.setString(1, catalogue);
//                    ps2.setInt(2, newNodeSequenceNumber);
//                    ps2.setInt(3, freeSequenceNumber);
//                    ps.executeUpdate();
//                    ps.close();
               } // end of if block
               rs.close();
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      * @param connection
      * @param catalogue
      * @param parent_attr parent attribute of the new node
      * @return
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          int sequenceNumber = 0;
          String query = "SELECT sort_sequence FROM vstd_media_cat_attributes " +
                            "WHERE catalogue=:1 " +
                            "CONNECT BY PRIOR attribute = parent_attr START WITH parent_attr=:2 " +
                            "ORDER BY sort_sequence DESC";
          try {
               PreparedStatement ps = connection.prepareStatement(query);
               ps.setString(1, catalogue);
               ps.setString(2, parent_attr);
               ResultSet rs = ps.executeQuery();
               if ( rs.next() ) {
                    sequenceNumber = rs.getInt("sort_sequence");
               } else {
                    // TODO: ggf fetch from request!
                    sequenceNumber = -1;
               rs.close();
               ps.close();
          } catch (SQLException e) {
               e.printStackTrace();
          return sequenceNumber;
}

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Illegal use of nonvirtual function call

I'm trying to run this program....
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import java.util.*;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
import sun.net.nntp.*;
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Vector result = new Vector();
NntpClient nc = new NntpClient(NNTP_HOST);
String line;
nc.serverOutput.println(NNTP_COMMAND_LIST_ACTIVE);
BufferedReader br = new BufferedReader(new InputStreamReader(nc.serverInput));
while ((line = br.readLine()) != null) {
if (line.equals("."))
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if (line.startsWith(root)) {
result.add(line.substring(0, line.indexOf(" ")));
nc.closeServer();
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private void init(String root) throws Exception {
Vector forums = getForumNames(root);
for (Enumeration e = forums.elements(); e.hasMoreElements();) {
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public static void main(String args[]) {
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          wns.db = wns.openNotesDB(DOMINO_HOST, DOMINO_USER, DOMINO_PASSWD,
DOMINO_DB);
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          //wns.init("forums.software.");
          wns.init("forums.hardware.");
          //wns.init("forums.services.");
          wns.store.close();
     }catch(Exception e){
          e.printStackTrace();
* Insert the method's description here.
* Creation date: (12/10/2001 9:51:20 AM)
* @param s java.lang.String
public Database openNotesDB(String host, String user, String passwd, String dbName) throws
NotesException {
lotus.domino.Session session =
NotesFactory.createSession(host, user, passwd);
db = session.getDatabase(session.getServerName(), dbName);
if (db == null)
     throw new NotesException();
else
     return db;
public String readWriteNewsgroup(String newsgroup) throws Exception {
// Get folder
Folder folder = store.getFolder(newsgroup);
folder.open(Folder.READ_ONLY);
// Get directory
Message messages[] = folder.getMessages();
for (int i = 0, n = messages.length; i < n; i++) {
//System.out.println( i + ": " + messages.getFrom()[0] + "\t" +
messages[i].getSubject());
Document doc = db.createDocument();
doc.replaceItemValue(MESSAGE_NUMBER,new Integer(messages[i].getMessageNumber()));
doc.replaceItemValue(MESSAGE_ID, messages[i].getHeader(MESSAGE_ID)[0]);
doc.replaceItemValue(DATE, messages[i].getReceivedDate());
doc.replaceItemValue(FROM, messages[i].getFrom()[0].toString());
doc.replaceItemValue(SUBJECT, messages[i].getSubject());
doc.replaceItemValue(NEWSGROUPS, messages[i].getHeader(NEWSGROUPS)[0]);
doc.replaceItemValue(ORGANIZATION, messages[i].getHeader(ORGANIZATION)[0]);
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System.out.println("Did not save the document");
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folder.close(false);
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C:\$user\java>java WriteNewsFile
Exception in thread "main" java.lang.VerifyError: (class: com/ibm/CORBA/iiop/Gen
ericServerSC, method: dispatch signature: (Lcom/ibm/CORBA/iiop/IIOPInputStream;L
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at com.ibm.CORBA.iiop.ORB.registerSubcontracts(ORB.java)
at com.ibm.CORBA.iiop.ORB.<init>(ORB.java)
at java.lang.Class.newInstance0(Native Method)
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at org.omg.CORBA.ORB.create_impl(ORB.java:306)
at org.omg.CORBA.ORB.init(ORB.java:355)
at lotus.domino.cso.Session.OREFtoSession(Session.java:703)
at lotus.domino.cso.Session.<init>(Session.java:57)
at lotus.domino.cso.Session.createSession(Session.java:36)
at lotus.domino.NotesFactory.createSession(NotesFactory.java:67)
at WriteNewsFile.openNotesDB(WriteNewsFile.java:88)
at WriteNewsFile.main(WriteNewsFile.java:66)
and don't understand the nature of the error...... Can anyone help or direct me to some information that might help me understand?
Thanks,
Heather

you have used a method that was implemented in JRE1.2 -- IE's native JVM 1.1.4 or 1.1.5 . You can do one of two things:
1) convert your html file to make it use a new Java plug-in, or
2) change your code to call a comparble method that is available before 1.2
V.V.

Upload and Download file through RFC called by java

We are trying to download/upload file through rfc function called by java(JCO),In the rfc function,we use WS_DOWNLOAD,but it does not work.
Any one know about this,Please help ,thanks very much.
Message was edited by: gw gw

Hi gw,
This question looks a little confusing to me.
WS_DOWNLOAD is used to download files from SAP to the presentation server (your PC). It will not work through RFC.
BUT, also if you want to access a function module via RFC is must be RFC enabled (as Anand pointed out).
AND WS_DOWNLOAD uses a PUSH approach. It pushes a file to the PC from ABAP. So even if the two points above weren't a problem it still would not be suitable for what you are doing.
Perhaps you could explain a little what you are trying to achieve.
Cheers,
Brad

UnsatisfiedLinkError with function call

Hi,
I am using JNI to make native function calls from Java.
I use
System.loadLibrary("myLibName");
to load my library, and that works without a problem.
I can use this library without any problems from a simple test app I wrote. However, I get an UnsatisfiedLinkError when I try and integrate with the rest of my applicaton. I am 100% certain that function is defined correctly in both Java and C++.
The only difference I can think of between my real application (which does not work) and my test application (which does work) is that in my real application, the object that makes use of the class that contains all my native methods is cloned before it makes any calls to my native code.
What can cause an UnsatisfiedLinkError if my System.loadLibrary() is correct, and my function definitions are also correct?
Thanks!
Eliott
Edited by: EliottH on Mar 1, 2010 12:17 PM

In case my post needs any clarification, here is some sample code that demonstrates what I am doing:
//An instance of this class gets cloned before any native function calls are made!
public class SomeClass implements Cloneable {
    JniClass jniclass;
    SomeClass() {
           jniclass = new JniClass();
    //This returns an UnsatisfiedLinkError when called
    public void func() {
            jniclass.nativeFunc1();
    public void clone() {
          //Something....
public class JniClass {
    public native void nativeFunc1();
    static {
         System.loadLibrary("myLibName");
}Edited by: EliottH on Mar 1, 2010 1:00 PM

[Tomcat] Incompatible object argument for function call

Hello,
I've got a jsp which use a DOM parser to read XML. This jsp works good on my station :
Tomcat 4.1.24
JDK 1.3.1_07
Windows XP
I put my webapp on another station :
Tomcat 4.1.24 (the same)
JDK 1.3.1_12
Windows NT
but there, my jsp return an error :
java.lang.VerifyError: (class: org/apache/jsp/doFncaBourse_jsp, method: _jspService signature: (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V) Incompatible object argument for function call
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:232)
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:151)
at org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:440)
at org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:390)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:471)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:479)
I don't understand where it comes from so if somebody can help me, it will be wonderful.
Thanks et good afternoon and sorry for my english.

Is it enough to write
set JAVA_OPT= "-noverify"
before
set EXECJAVA=%RUNJAVA%
set MAINCLASS=org.apache.catalina.startup.Bootstrap
set ACTION=start
set SECURITY_POLICY_FILE=
set DEBUG_OPTS=
set JPDA=
?

"asynchronous method call"

Dear all,
I am writing a program for which I would like to enable parallel processing. As the programm is designed in classes and methods, I thought it would be nice and consistent to use methods calls instead of asynchronous function calls. I found a class for remote method calls but this does not appear asynchronous.
Any idea if it is possible?
Thanks
Christian

Hi,
Perhaps a way to accomplish this is to create an OO transaction in SE93. Take a look at http://help.sap.com/saphelp_nw04/helpdata/en/a8/485d60cf4611d4b2e90050dadfb92b/frameset.htm for further details.
You can then issue the statement CALL TRANSACTION <tcode> UPDATE 'A' (for asynchronous), or as suggested in one of previous discussions, use
CALL FUNCTION 'ABAP4_CALL_TRANSACTION' STARTING NEW TASK 'TEST'
DESTINATION 'NONE'
EXPORTING
      TCODE = <your_oo_tcode>
EXCEPTIONS
    COMMUNICATION_FAILURE = 1 MESSAGE MSG_TEXT
    SYSTEM_FAILURE        = 2 MESSAGE MSG_TEXT.
You can also look at ABAP Object Services, especially Transaction Service, at http://help.sap.com/saphelp_nw04/helpdata/en/ab/9d0a3ad259cd58e10000000a11402f/frameset.htm.
Hope this helps.

Type Mismatch error while calling a Java Function from Visual Basic 6.0...

Hi,
I'm having a problem in calling the Java Applet's Function from Visual Basic. First, I'm getting the handle of the Java Applet and components of it using "Document.Applets(n)" which is a HTML function. I'm calling this function from Visual Basic. My code is something like this...
' // Web1 is IE Browser in my Form.
Dim Ap,Comp
Dim Bol as Boolean
Bol = true
Ap = Web1.Document.Applets(0).getWindow() ' \\ Gets the Parent Window.
Ap.setTitle("My Java Applet") ' \\ Sets the Title of the window.
msgbox Ap.getVisibility() ' \\ This will return a Java boolean ( true or false )
Ap.setVisibility(Bol) ' \\ Function Syntax is : void setVisibility(boolean b)
Here in my code , i'm able to call any function that which accepts Integer or String but not boolean. So, i m facing problem with Ap.setVisibility() function. It gives me a "Type mismatch error" while executing it. Can you please tell me a way to do this from Visual Basic !
I'm using Visual Basic 6.0, Windows 2000 , J2SDK 1.4.2_05.
Please help me Friends.
Thanks and Regards,
Srinivas Annam.

Hi
I am not sure about this solution. try this
Declare a variable as variant and store the boolean value in that variable and then use in ur method.
Post ur reply in this forum.
bye for now
sat

CNTL_ERROR while calling a function module from Java webdynpro

I am calling a RFC function module from javawebdynpro app
which inturn calls a function module performing BDC on CAPP transaction. When I run this from SE37 of the same system or a different system everything works fine. But when called from Java webdynpro app, it raises a CNTL_ERROR exception and creates a short dump.
Any help on this is highly appreciated

Good catch, BI Learner. This was exactly it: when assigning the values from SOURCEFIELDS directly to the import/export parameters, you have to make sure that the types are EXACTLY the same, otherwise it will not work (the routine stops with an error when calling the FM, but there is no dump).
Therefore, to solve my problem, I created the declarations precisely as expected by the FM and assigned the values to these fields:
DATA:
      SOURCEVAL TYPE /BIC/OIINVQTY,
      SOURCEUOM TYPE /BIC/OIUSUOM,
      USITM TYPE /BIC/OIUSITM,
      TARGETUOM TYPE /BIC/OIUSUOM,
      CONVERTED_COST TYPE /BIC/OIINVQTY.
DATA PRODUCTION_UOM TYPE /BIC/OIUSUOM.
" get the Production UOM
    SELECT SINGLE I~/BIC/USPRDUOM
      FROM /BIC/PUSITM AS I
      INTO PRODUCTION_UOM
      WHERE I~/BIC/USITM = SOURCE_FIELDS-/BIC/USITM AND I~OBJVERS = 'A'.
    IF ( SY-SUBRC = 4 ). " no records found
      "RAISE PARTNO_NOT_FOUND.
      RAISE EXCEPTION TYPE CX_RSROUT_SKIP_RECORD.
    ENDIF.
" load the parameters
    SOURCEVAL = SOURCE_FIELDS-/BIC/USFRZMFC.
    SOURCEUOM = SOURCE_FIELDS-BASE_UOM.
    USITM = SOURCE_FIELDS-/BIC/USITM.
" then you can call the FM
    CALL FUNCTION 'Z_CA_CONVERT_US_COST'
      EXPORTING
        PSOURCEVAL                = SOURCEVAL
        PSOURCEUOM                = SOURCEUOM
        PUSITM                    = USITM
        PTARGETUOM                = PRODUCTION_UOM
      IMPORTING
        PTARGETVAL                = CONVERTED_COST
      EXCEPTIONS
        CONVERSION_NOT_MAINTAINED = 1
        PARTNO_NOT_FOUND          = 2
        OTHERS                    = 3.
" ... [do the rest]
Thanks for your help,
Dennis

How to call the java method in java script function in a portal application

Hi Friends,
I am developing one application where i need to fetch the data from KM content and displaying it on the screen in regular interval. I wrote one method in JSPdynpage for fetching data from KM content now I need to call that java method in java script function.
java method(IComponentRequest request)
//Coode for fetching the KM content
function()
<b>//Need to call the java method</b>
setTimeout(function, 5000);//setting the time interval for this function
<<htmlb display code>>
If anybody can help me in calling the java method in java script function that will be very helpful for me.
Thanks in advance,
Sandeep Bonam

Hi,
Pls see if the following links could help.
http://www.rgagnon.com/javadetails/java-0170.html
http://www-128.ibm.com/developerworks/library/wa-resc/?dwzone=web
Regards

Calling a Java Function from PL/SQL

Hi,
I would like to call a Java API from a java class residing on the middle tier ($OA_JAVA)
from the subscription code of a business event. The business event will have a
subscription with java rule function as my Java API. And the business event will be
raised from PL/SQL code using WF_EVENT.RAISE API. I want the Java API to
executed SYNCHRONOUSLY without deferring the event. Can you please provide
pointers to this.
Regards
Ramesh

Documentation here: http://download-uk.oracle.com/docs/cd/B14117_01/java.101/b10983/datamap.htm#sthref185
says JPublisher can publish records too.
But when I change the example given at http://download-uk.oracle.com/docs/cd/B14117_01/java.101/b10983/datamap.htm#sthref190 as following:
PACKAGE "COMPANY" AS
type emp_rec is record (empno number, ename varchar2(10));
type emp_list is varray(5) of emp_rec;
type factory is record (
name varchar(10),
emps emp_list
function get_factory(p_name varchar) return factory;
END;
then I see <unknown type or type not found> at sql or java files generated. Any ideas?

Asynchronous function calls in Java?

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