Integrating two Java application

I need to integrate two Java applications.
Can you recommend any articles or share your experience in this field.
Thanks.

Thanks for the response.
Unfortunately database solution is not acceptable, that's why I am looking for Java solution, I was thinking about SOAP or other XML based solutions, but I need more info or maybe a comparison of different solutions, their pros and cons.

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Crystal Report Server 2008 integration with java application

Hi All,
Any of you having complete document about Crystal Report Server 2008 integration with java application....like source code and what are all the jar files needed? Or tell me that the implementation is same as Crystal Report Server XI R2?
Thanks

Have you looked at the BusinessObjects Enterprise XI 3.x Java Developer Guide?
[http://www.sdn.sap.com/irj/boc/sdklibrary]
Sincerely,
Ted Ueda

APEX application integration into Java application

Hello,
I'm working on a new APEX application and I would like to integrate that application into an existing Java application.
The integration should be invisible for the end-users. Our application will have the same look and feel as the Java application.
The existing menu of the Java app will be extended with a new link. This link will then call our application.
Visually I was thinking about using an Iframe to display the content of the APEX application inside the Java generated xHTML.
This is however not the biggest issue.
We are working in a secure context and we thus need to make sure that our APEX application doesn't create a backdoor on the
security mechanism provided by the Java app.
Some options have come to mind, but the one that look best is this:
We keep the java application as the single point of entry for our end-users and make sure that the apex application is "hidden".
We could do this by means of some re-routing code in the java application so that the incomming requests there are send to the correct server (java or apex).
Then we will need to capture the response of the APEX application and place it inside the Java generated xHTML. The combined content is then send to the client.
Or we could place a reverse proxy server that does this for us.
The goal is thus that we can rely on the existing java application to cover the security and the navigation structure.
Any ideas on this ?
How-to's or other options ?
thanks & regards
Karel

In a project I am currently working on we do it using iframes and passsing parameters over a http link.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
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Drag and Drop between two java applications

Hi,
I am trying to implement drag and drop between two instances of our java application. When i drop the content on the target, the data flavors are transmitted properly, but i get the exception :
java.awt.dnd.InvalidDnDOperationException: No drop current
     at sun.awt.dnd.SunDropTargetContextPeer.getTransferData(SunDropTargetContextPeer.java:201)
     at sun.awt.datatransfer.TransferableProxy.getTransferData(TransferableProxy.java:45)
     at java.awt.dnd.DropTargetContext$TransferableProxy.getTransferData(DropTargetContext.java:359)
     at com.ditechcom.consulbeans.TDNDTree.drop(TDNDTree.java:163)
     at java.awt.dnd.DropTarget.drop(DropTarget.java:404)
     at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(SunDropTargetContextPeer.java:547)
How can i fix this ?
Thanks a lot,
Karthik

Play with this;-import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
// Credit to bbritna who I stole it from in the 'New To ..' Forum
public class DragComps implements DragGestureListener, DragSourceListener,
                                     DropTargetListener, Transferable{
    static final DataFlavor[] supportedFlavors = { null };
    static{
          try {
              supportedFlavors[0] = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType);
          catch (Exception ex) { ex.printStackTrace(); }
    Object object;
    // Transferable methods.
    public Object getTransferData(DataFlavor flavor) {
           if (flavor.isMimeTypeEqual(DataFlavor.javaJVMLocalObjectMimeType))
         return object;
           else return null;
    public DataFlavor[] getTransferDataFlavors() {
           return supportedFlavors;
    public boolean isDataFlavorSupported(DataFlavor flavor) {
           return flavor.isMimeTypeEqual(DataFlavor.javaJVMLocalObjectMimeType);
    // DragGestureListener method.
    public void dragGestureRecognized(DragGestureEvent ev)    {
           ev.startDrag(null, this, this);
    // DragSourceListener methods.
    public void dragDropEnd(DragSourceDropEvent ev) { }
    public void dragEnter(DragSourceDragEvent ev)   { }
    public void dragExit(DragSourceEvent ev)        { }
    public void dragOver(DragSourceDragEvent ev) {
           object = ev.getSource(); }
    public void dropActionChanged(DragSourceDragEvent ev) { }
    // DropTargetListener methods.
    public void dragEnter(DropTargetDragEvent ev) { }
    public void dragExit(DropTargetEvent ev)      { }
    public void dragOver(DropTargetDragEvent ev) {
           dropTargetDrag(ev); }
    public void dropActionChanged(DropTargetDragEvent ev) {
       dropTargetDrag(ev); }
    void dropTargetDrag(DropTargetDragEvent ev) {
           ev.acceptDrag(ev.getDropAction()); }
    public void drop(DropTargetDropEvent ev)    {
           ev.acceptDrop(ev.getDropAction());
               try {
                   Object target = ev.getSource();
                  Object source = ev.getTransferable().getTransferData(supportedFlavors[0]);
                   Component component = ((DragSourceContext) source).getComponent();
                   Container oldContainer = component.getParent();
                   Container container = (Container) ((DropTarget) target).getComponent();
                   container.add(component);
                   oldContainer.validate();
                   oldContainer.repaint();
                   container.validate();
                   container.repaint();
               catch (Exception ex) { ex.printStackTrace(); }
               ev.dropComplete(true);
    public static void main(String[] arg)    {
          JButton button = new JButton("Drag this button");
          JLabel label = new JLabel("Drag this label");
          JCheckBox checkbox = new JCheckBox("Drag this check box");
          JFrame source = new JFrame("Source Frame");
          Container source_content = source.getContentPane();
          source.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          source_content.setLayout(new FlowLayout());
          source_content.add(button);
          source_content.add(label);
          JFrame target = new JFrame("Target Frame");
          Container target_content = target.getContentPane();
          target.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          target_content.setLayout(new FlowLayout());
          target_content.add(checkbox);
          DragComps dndListener = new DragComps();
          DragSource dragSource = new DragSource();
          DropTarget dropTarget1 = new DropTarget(source_content,
          DnDConstants.ACTION_MOVE, dndListener);
          DropTarget dropTarget2 = new DropTarget(target_content,
          DnDConstants.ACTION_MOVE, dndListener);
          DragGestureRecognizer dragRecognizer1 =
          dragSource.createDefaultDragGestureRecognizer(button,
          DnDConstants.ACTION_MOVE, dndListener);
          DragGestureRecognizer dragRecognizer2 =
          dragSource.createDefaultDragGestureRecognizer(label,
          DnDConstants.ACTION_MOVE, dndListener);
          DragGestureRecognizer dragRecognizer3 =
          dragSource.createDefaultDragGestureRecognizer(checkbox,
          DnDConstants.ACTION_MOVE, dndListener);
          source.setBounds(0, 200, 200, 200);
          target.setBounds(220, 200, 200, 200);
          source.show();
          target.show();
}[/code

Integrating two web applications in JDev 9i

Hi all,
what is the best way to integrate two web applications developed independently, on JDeveloper 9.0.3.4?
I tried with one project for each application but no success. I then tried as one project by tweaking another application that my application depends on. The other application handles user management, login etc. The problem is after logon I get the link to the services of my application, but the root context to which I am directed is not recognized because it is set as the root of that user management application. If I enter correct URL, then the session is not preserved and I am redirected to login page again, i.e. I cannot switch smoothly between application contexts and test how it works together.
Many thanks,
mile

Hi Suman,
For enabling SSO for web apps we need have 3 options in hand.
Please check the below link for the three methods.
http://help.sap.com/saphelp_nw04/helpdata/en/12/9f244183bb8639e10000000a1550b0/frameset.htm
This also depends on the Portal version we are using, If the Portal is EP 6 APP integrator as you mentioned works but if its EP 7 pls use the below link for enabling SSO for web apps
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/f05ae0f0-bf93-2b10-ed9e-a7320c012841
Hope this helps solve your problems.
Good Luck!
Regards,
Shaila
Edited by: Shaila kasha on May 26, 2009 11:51 AM

Integrating a Java application in Forms

Hello,
I've developped a 3-tier Java application and i'd like to make it plugable with a Forms Application.
I searched and read a lot of docs about the iView Interface but I'm asking myself some questions :
What I am supposed to do with my java code ? put it in a jar ? import in Forms ?
I'm using eclipse and isn't used to javaBeans, J2EE, war and so on... I don't know how to get started
thanks for any help

Hello,
What do you mean by "plugable" ?
Do you want to handle its methods from the Forms module ?
Look at the Forms FBean internal package that provides built-ins to invoke the public methods stored in your Java program.
All you have to do is to copy the jar file in the /forms/java directory and add the name of this jar file to your archive or jinit_archive tag of the /forms/server/formsweb.cfg file.
Francois

How to merge two java files with InputDialog to select?Please help me!?

//Addition Java application
import javax.swing.JOptionPane; // import the class
public class Addition {
// main method
public static void main(String[] args)
String firstNumber, secondNumber;
int number1, number2, sum;
// read the first number
firstNumber = JOptionPane.showInputDialog("Please enter a integer: ");
// read the second number
secondNumber = JOptionPane.showInputDialog("Please enter another integer: ");
// data type conversion
number1 = Integer.parseInt(firstNumber);
number2 = Integer.parseInt(secondNumber);
sum = number1 + number2;
// display the result
JOptionPane.showMessageDialog(null, "The sum is " + sum + ".", "Results", JOptionPane.PLAIN_MESSAGE);
System.exit(0);
//Multiplication Java Application
import javax.swing.JOptionPane;
public class Multiplication5
public static void main(String args[])
int number1, number2, number3, number4, number5, product;
String firstNumber, secondNumber, thirdNumber, forthNumber, fifthNumber ;
firstNumber =
JOptionPane.showInputDialog("Please input an integer");
secondNumber =
JOptionPane.showInputDialog("Please input another integer");
thirdNumber =
JOptionPane.showInputDialog("Please input the third integer");
forthNumber =
JOptionPane.showInputDialog("Please input the forth integer");
fifthNumber =
JOptionPane.showInputDialog("Please input the fifth integer");
number1 = Integer.parseInt(firstNumber);
number2 = Integer.parseInt(secondNumber);
number3 = Integer.parseInt(thirdNumber);
number4 = Integer.parseInt(forthNumber);
number5 = Integer.parseInt(fifthNumber);
product = number1 * number2 * number3 * number4 * number5;
JOptionPane.showMessageDialog(null, "The product is " + product, "Results", JOptionPane.PLAIN_MESSAGE);
System.exit(0);
I seek for help to merge above two java application files.
I need to call JoptionPane.showInputDialog to prompt the user to input the operation, 1 for addition, 2 for multiplication. In this dialog, the user is expected to enter the integer of 1 or 2 for the calculation.
Please help me ! Thank you!

Hi CRay,
You just need to call the main methods of the 2 classes according to "1" or "2" entered.
It is better if the "multiplication" and "addition" are declared as methods rather than in main methods.
Example:-
public static void Addition()
Then call
Addition.addition();
than
Addition.main(new String[]{});
as shown below.
import javax.swing.JOptionPane; // import the class
public class Test{
    public static void main(String[] args){
        // read which operation to perform
        String operation = JOptionPane.showInputDialog("Please enter which operation : ");
        if(operation.equals("1")){
            Addition.main(new String[]{});
        else{
            Multiplication5.main(new String[]{});
}Rose

What ways of communication between two java apps you know?

Hi all
Lame (but not for me) question.
I have two java applications (first is web-app unning on server (tomcat or JBoss) and second is a standalone java app). Both are running on different JVM and both have to communicate with each other quite often - but mainly: the second one is going to pass results of its work to the first one.
What way of communication would you suggest?
Ps. I'm free to choose frameworks and overall architecture.
Regards
Grzesiek

YoungWinston wrote:
Blimey. That's a question and a half; and the answer will likely depend on what you need to do/send.
For straight messaging, there's JMS, but for more esoteric stuff you might want to involve a database, so you may want to look at JDBC (or even something like Hibernate). EJBs generally use servlets, or there's also straight HTTP, even raw sockets.
I suspect to need to rein in your question a bit and come up with some specifics.
Winston
Edited by: YoungWinston on Jan 13, 2011 5:26 PM
Too slow, as usual :-)So:
Blimey. That's a question and a half; and the answer will likely depend on what you need to do/send.Plain text, just statements ;)
For straight messaging, there's JMS, but for more esoteric stuff you might want to involve a database, so you may want to look at JDBC (or even something like Hibernate).Yes, JMS is what might solve my problem. Even if there will be any database(?), the only ones I would be considering are H2, Derby, HSQLDB.
I suspect to need to rein in your question a bit and come up with some specificsA little more details? Ok....
Firstly, ordinary user via web app creates text file, and when it's ready - starts second app in separate JVM (separate JVM is needed due to risk of OutOfMemoryError or any other crashes).
Second app (standalone) is going to process this file (it might take hours/days/weeks) and inform web-app about his progress (about 5 messages per minute).
Of course all those messages are going to be saved in log file/ database (log file should be easier way to go).
Note that many standalone instances of second app are going to be run simultaneously (I think that this is the place to use some database - to store info about all instances: whether they finished successfully or not: eg. due to some crashes)
Thanks for you time and effort
All of You helped me already ;)

Calling a java application from within another class

I have written a working java application that accepts command line parameters through public static void main(String[] args) {} method.
I'm using webMethods and I need to call myapplication from within a java class created in webMethods.
I know I have to extend my application class within the webMethods class but I do not understand how to pass the parameters.
What would the syntax look like?
Thanks in advance!

why do you want to call the second class by its main method ??
Why not have another static method with a meaningfull name and well defined parameters ?
main is used by the jvm as an entry point in your app. it is not really meant for two java applications to communicate with each other but main and the code is not really readable.
Have a look at his sample
double myBalance = Account.getBalance(myAccountId);
here Account is a class with a static method getBalance which return the balance of the account id you passed.
and now see this one, here Account has a main method which is implemented to call getBalance.
String[] args = new String[1];
args[0] = myAccountId;
Account.main(args);
the problem with the code above is
main doesn't return anything so calling it does do much good. two the code is highly unreadable because no one know what does the main do... unlike the sample before this one where the function name getBalance clearly told what is the function doing without any additional comments.
hope this helps.... let me know if you need any additional help.
regards,
Abhishek.

HTTP connection between two java programs(classes)

Hello everyone,
here's my question:
I need to create two java applications(just two console apps) that can exchange data with each other only via the HTTP protocol. I guess I have to use the URLConnection class. How can I do that? Basically I need to make one app work as a server and the other one just as a simple client.
thanks in advance

URLConnection.
As for the server, you could use a Servlet. There are Java libraries that act as a servlet container without requiring installation. Jetty comes to mind.

Two java edition at the same pc

Hello
I have two java applications one of them running on java 1.5 and the other one running on java 1.4 and i have set the java home to java 1.5 .
My question is how can i run my application on java 1.4 without changing the java home class path i.e( let the application read from 1.4 jdk)
Regards
Mohd.Weshah

Simply start it with the right "java" command and it should automatically pull the proper libraries and jars. I would suggest not having JAVA_HOME (or any of the other Java related variables) set on the System level.

Could I call another java application?????

I wanna to exec another java application in my current Java Application.Could I?????
can U tell me how to do this????
thanx.

yes u can do it in two ways !
1) if ur problem is associated with execution of different application just like running two java application simultaneously .
then u can use this
call runtime environment by
Runtime run= Runtime.getRuntime();
then execute any process using exec() method
run.exec(command);
here command is a simple string which is the command syntax to run java application
e.g.
String command="java program1" to running program1.class
2)but if ur problem is just execute a class file which being called by another class file.
then its so simple.
when u click button or select any item from list an event will be generated and in event hanling u just call the constructor of ur class file or main() method.
public void itemStateChanged(itemEvent ie)
if(list.getSelectedItem().equals("file1.class")
file1 f=new file1();
or
file1.main("xxx","yyy");
}

Two related questions: ColdFusion 10/Java applications and J2EE supported servers

I have two related questions:
1. CF10 and integration with Java Web applications
We have a couple of Java applications running on JRun and interfacing with CF9 applications. The JRun clusters were created through the JRun Admin and, apart from lack of Axis 2.0 support, have served us well for years now. And, as would be the case, the ColdFusion9/Java/Flash application is a critical public-facing application that the business uses for bidding on projects.
It appears that with ColdFusion 10 on Tomcat, we will not be able to run those Java applications on a Tomcat-CF10 JVM cluster. Is this correct? IF so, what are our options?
2. J2EE Application Servers supported by Adobe for CF10
Which of these is correct?
A. This URL (http://www.adobe.com/products/coldfusion-enterprise/faq.html) states "ColdFusion 10 supports IBM® WebSphere, Oracle® WebLogic, Adobe JRun, Apache Tomcat, and JBoss."
B. This URL (http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/coldfusion/pdfs/cf1 0/coldfusion10-support-matrix.pdf) states:
"J2EE application servers: WebLogic Server 10.3, 11.1, WebSphere Application Server 7, ND 7 JBoss 5.1, 6.0, 7.1.0"
I *think* "A" above is wrong re. support for Adobe JRun. It does not specify a version of Apache Tomcat unless it is simply referring to the custom version the comes with CF10.
Option "B" above shows no support of Adobe JRun or 'standard' Apache Tomcat.
Thanks,
Scott

Question 1 above was answered: "No support for Java web applications under CF10's custom version of Tomcat"
Question 2: No answer yet: Is Apache Tomcat (NOT Adobe's customized version) supported for CF10 J2EE deployment? I do not see any installation instructions on how to install CF10 on Apache Tomcat 6 or 7.
Is anybody using Apache Tomcat as their J2EE app servers and, again, NOT Adobe's customized/limited version?
Thanks,
Scott

Integrating java application running on OC4J server with EP Iview

Hi,
I Want to Integrate Java Application running on OC4J server with my Enterprise portal
Can any one please help me out in this??
Regards
Padma N

Hi Padma
Its possible to integrate a java application running in the other server with enterprise portal.In portal i think there is a IView template call Java application template.Using this generally we can do this.But in you case what type of a java application is it?Just a class or webapplication or a server side application.This you can also acheive using a webdynpro applications as these are very flexible with integration into EP.In webdynpro you can use suspend and resume plugs to navigate from one application to other application.I have given my ideas how to implement.But integration mainly depends upon your landscape and version compatibilities and type of the application you need to integrate.
Hope this answer helps you in implementation.
Regards
Kalyan

Integrating a Java web application into the SAP NetWeaver Portal

Hello experts,
We have a requirement to integrate a Java based web application into the SAP NetWeaver Portal using iView/iFrame technology. The Java based web application is completely independent from the SAP environment but should be displayed as part of the SAP Portal environment. The other requirement is the main navigation menu for the Java based web application should be configured and provided in the SAP Portal.
Any pointers on how exactly this can be done would be of great help.
Also how can the SSO (Single-Sign-On) to the Java application be implemented so that the user can logon to the java application through the portal without providing the user credentials again.
Thanks in advance.

Hi,
I think you can use URL iviews to integrate your java web application with EP. you have the option of doing SSO with the application as well.
Have a look at the sap help material
http://help.sap.com/saphelp_nw04/helpdata/en/f5/eb51730e6a11d7b84900047582c9f7/frameset.htm
http://wiki.sdn.sap.com/wiki/display/BOBJ/CreateURLiviewintotheSAPEP+portal
Regards,
Ganesh N

Integrating two Java application

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