Calling apps from servlet

Hi. Had a quite challenging issue here. I had a web portal that can be accessed by others just like any other web site, and this portal is done in java servlet. Whenever someone access the portal, it'll call an application to do some checking and validation. But the application is being run 24 hours non stop whereas the portal can be dead or alive depending of the user. How should i be able to pass the information to the application as i cannot recall or restart it everytime?? I can't use socket as well due to some limitation. Is it possible that i can call the application's function within my portal??
Another point is that although i can have many portal being accessed at the same time but there'll only be one validating application running, how should i configure in the portal so that it'll 'recognize' the same application and calls the same application for all the portals??
Really appreciate some advice and information. Thanx!

Questions
Do you have a webapp(portal) running on an application server(i.e. tomcat)?
Sometimes it can be dead or alive, this means the app. server in shutdown sometimes?
You have a validation application, which validates data running outside the app. server?
Is the validatation application a java app or windows/other app?
How do you start/stop the validation app?(i.e. start.exe)
Do you mean have instead of had?

Similar Messages

Calling class from servlet gives 500

I have a servlet that works fine by itself, and another class that works fine by itself. However, when I try to create a new instance of the class using the servlet and access a method in the class such as:
Servlet code
Object a = new Object()
a.method
the server returns 500.
Is there some security aspect to calling classes from servlets that may be causing this?

Thanks for the replies which have tracked the problem down.
The Server log says:
NoClassDefFoundError: oracle/jdbc/driver/OracleDriver
This class is needed by the class being called by the servlet.
The missing class is in a jar file which is put on the classpath when running the class in a standalone environment. I don't know if it's possible to put this jar on the classpath in the Server environment.
However a solution is to explode the jar file and put the exploded classes in the WEB-INF/classes of the Server. The only disadvantage is that they get wiped out every time I re-deploy the application war file.

How to call JSp from Servlet??

Hello,
I want to call JSP page from servlet.I am using Visual Age For java 3.4. What is wrong in my code??
if (userExists) {
f.setErrors("userName","Duplicate User: Try a different username");
getServletConfig().getServletContext().
getRequestDispatcher("/jsp/forms/retry.jsp").
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I am not able to get the o/p. Pls help.

I can't see anything obvious, but did you take any steps towards doing output before this code (like openning an output stream)?
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Calling JBean from Servlet

Have a java bea located at \web-inf\classes\mybeans called UserData.java
And would like to call it from my servlet to pass data located at \web-inf\classesHow would I do that?

If your using webLogic server, then the below link may help you.
http://edocs.bea.com/workshop/docs81/doc/en/core/index.html

Calling ejbs from servlets without using web apps.

i am trying to instantiate and ejb from a servlet but it gives me the
          following error. the configuration and code that generated this error is
          attached below.
          oddly enough the same chunk of code works fine in a stand alone client if
          j2ee.jar;weblogic\classes and weblogicaux.jar are included in the classpath.
          any help would be appreciated.
          peter
          -8787844: in servlet.Webmedx.init
          -8787844: null
          java.lang.ClassCastException
          at
          com.sun.corba.ee.internal.javax.rmi.PortableRemoteObject.narrow(Porta
          bleRemoteObject.java:296)
          at
          javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
          at webmedx.servlet.Webmedx.init(Webmedx.java:23)
          at javax.servlet.GenericServlet.init(GenericServlet.java:258)
          at
          weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubIm
          pl.java:474)
          at
          weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStub
          Impl.java, Compiled Code)
          at
          weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubI
          mpl.java:422)
          at
          weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
          java:187)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          pl.java:118)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:760)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:707)
          at
          weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          ContextManager.java:251)
          at
          weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          a:369)
          at
          weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:269)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled
          Code)
          configuration:
          WebLogic startup settings are presently:
          CLASSPATH Prefix
          \weblogic\lib\weblogic510sp5boot.jar;\j2ee\lib\j2ee.jar;\web
          logic\lib\servlet.jar;\weblogic\lib\jaxp.jar;\weblogic\lib\parser.jar
          CLASSPATH
          \weblogic\lib\weblogic510sp5boot.jar;\j2ee\lib\j2ee.jar;\web
          logic\lib\servlet.jar;\weblogic\lib\jaxp.jar;\weblogic\lib\parser.jar;\weblo
          gic\
          jre1_2\lib\tools.jar;\weblogic\jre1_2\jre\lib\rt.jar;\weblogic\jre1_2\jre\li
          b\i1
          8n.jar;C:\weblogic\license;C:\weblogic\classes\boot;C:\weblogic\classes;C:\w
          eblo
          gic\lib\weblogicaux.jar;C:\weblogic\eval\cloudscape\lib\cloudscape.jar
          JAVA_HOME \weblogic\jre1_2
          WEBLOGIC_LICENSEDIR C:\weblogic\license
          WEBLOGIC_HOME C:\weblogic
          system properties:
          java.security.manager
          java.security.policy=\weblogic\weblogic.policy
          weblogic.system.home=\weblogic
          java.compiler=symcjit
          weblogic.class.path=\weblogic\lib\weblogic510sp5.jar;\weblog
          ic\license;\weblogic\classes;\weblogic\lib\weblogicaux.jar
          INITIAL_HEAP 64 MB
          MAX_HEAP 64 MB
          SERVERCLASSPATH
          \weblogic\lib\weblogic510sp5boot.jar;\j2ee\lib\j2ee.jar;\web
          logic\lib\servlet.jar;\weblogic\lib\jaxp.jar;\weblogic\lib\parser.jar;\weblo
          gic\
          jre1_2\jre\lib\rt.jar;\weblogic\jre1_2\jre\lib\i18n.jar;C:\weblogic\classes\
          boot
          ;C:\weblogic\eval\cloudscape\lib\cloudscape.jar
          Type "wlconfig -help" for program usage.
          code:
          public void init() throws ServletException{
          try{
          Log.debug("in servlet.Webmedx.init");
          Properties h = new Properties();
          h.put(Context.INITIAL_CONTEXT_FACTORY,
          "weblogic.jndi.WLInitialContextFactory");
          h.put(Context.PROVIDER_URL, "t3://localhost:7001");
          Context initial = new InitialContext(h);
          Object objref = initial.lookup("webmedx/pool");
          webmedxpoolhome =
          (WebmedxPoolHome)PortableRemoteObject.narrow(objref,WebmedxPoolHome.class);
          }catch(Exception ex){
          Log.error(ex);


The problem before was that you were trying to load the same class from
          2 different class paths. The ClassCastException is very un-intuitive in this
          case.
          Peter Ghosh wrote:
          > however, when i added it to the classpath prefix (not the
          > weblogic.classpath) it seemed to do the trick. very odd.
          > thanks,
          > peter
          >
          > "Peter Ghosh" <[email protected]> wrote in message
          > news:[email protected]...
          > > i tried that but no luck. any other suggestions?
          > > peter
          > >
          > > "Ohad Shany" <[email protected]> wrote in message
          > > news:[email protected]...
          > > > Is your EJB classes on the servlet classpath?
          > > > (weblogic.httpd.servlet.classpath property)
          > > >
          > > > I had some strange casting problem when my EJB classes was on the
          > servlet
          > > > classpath
          > > > and it was gone when i moved them to the weblogic.class.path . Worth a
          > > try.
          > > >
          > > > OHAD
          > > >
          > > > Peter Ghosh wrote:
          > > >
          > > > > i am trying to instantiate and ejb from a servlet but it gives me the
          > > > > following error. the configuration and code that generated this error
          > is
          > > > > attached below.
          > > > > oddly enough the same chunk of code works fine in a stand alone client
          > > if
          > > > > j2ee.jar;weblogic\classes and weblogicaux.jar are included in the
          > > classpath.
          > > > > any help would be appreciated.
          > > > > peter
          > > > >
          > > > > -8787844: in servlet.Webmedx.init
          > > > > -8787844: null
          > > > > java.lang.ClassCastException
          > > > > at
          > > > > com.sun.corba.ee.internal.javax.rmi.PortableRemoteObject.narrow(Porta
          > > > > bleRemoteObject.java:296)
          > > > > at
          > > > > javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
          > > > > at webmedx.servlet.Webmedx.init(Webmedx.java:23)
          > > > > at javax.servlet.GenericServlet.init(GenericServlet.java:258)
          > > > > at
          > > > > weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubIm
          > > > > pl.java:474)
          > > > > at
          > > > > weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStub
          > > > > Impl.java, Compiled Code)
          > > > > at
          > > > > weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubI
          > > > > mpl.java:422)
          > > > > at
          > > > > weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
          > > > > java:187)
          > > > > at
          > > > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          > > > > pl.java:118)
          > > > > at
          > > > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > > > > textImpl.java:760)
          > > > > at
          > > > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > > > > textImpl.java:707)
          > > > > at
          > > > > weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          > > > > ContextManager.java:251)
          > > > > at
          > > > > weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          > > > > a:369)
          > > > > at
          > > > > weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:269)
          > > > >
          > > > > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled
          > > > > Code)
          > > > >
          > > > > configuration:
          > > > >
          > > > > WebLogic startup settings are presently:
          > > > >
          > > > > CLASSPATH Prefix
          > > > > \weblogic\lib\weblogic510sp5boot.jar;\j2ee\lib\j2ee.jar;\web
          > > > > logic\lib\servlet.jar;\weblogic\lib\jaxp.jar;\weblogic\lib\parser.jar
          > > > > CLASSPATH
          > > > > \weblogic\lib\weblogic510sp5boot.jar;\j2ee\lib\j2ee.jar;\web
          > > > >
          > >
          > logic\lib\servlet.jar;\weblogic\lib\jaxp.jar;\weblogic\lib\parser.jar;\weblo
          > > > > gic\
          > > > >
          > >
          > jre1_2\lib\tools.jar;\weblogic\jre1_2\jre\lib\rt.jar;\weblogic\jre1_2\jre\li
          > > > > b\i1
          > > > >
          > >
          > 8n.jar;C:\weblogic\license;C:\weblogic\classes\boot;C:\weblogic\classes;C:\w
          > > > > eblo
          > > > > gic\lib\weblogicaux.jar;C:\weblogic\eval\cloudscape\lib\cloudscape.jar
          > > > > JAVA_HOME \weblogic\jre1_2
          > > > > WEBLOGIC_LICENSEDIR C:\weblogic\license
          > > > > WEBLOGIC_HOME C:\weblogic
          > > > > system properties:
          > > > > java.security.manager
          > > > > java.security.policy=\weblogic\weblogic.policy
          > > > > weblogic.system.home=\weblogic
          > > > > java.compiler=symcjit
          > > > >
          > > > > weblogic.class.path=\weblogic\lib\weblogic510sp5.jar;\weblog
          > > > > ic\license;\weblogic\classes;\weblogic\lib\weblogicaux.jar
          > > > > INITIAL_HEAP 64 MB
          > > > > MAX_HEAP 64 MB
          > > > > SERVERCLASSPATH
          > > > > \weblogic\lib\weblogic510sp5boot.jar;\j2ee\lib\j2ee.jar;\web
          > > > >
          > >
          > logic\lib\servlet.jar;\weblogic\lib\jaxp.jar;\weblogic\lib\parser.jar;\weblo
          > > > > gic\
          > > > >
          > >
          > jre1_2\jre\lib\rt.jar;\weblogic\jre1_2\jre\lib\i18n.jar;C:\weblogic\classes\
          > > > > boot
          > > > > ;C:\weblogic\eval\cloudscape\lib\cloudscape.jar
          > > > >
          > > > > Type "wlconfig -help" for program usage.
          > > > >
          > > > > code:
          > > > >
          > > > > public void init() throws ServletException{
          > > > > try{
          > > > > Log.debug("in servlet.Webmedx.init");
          > > > > Properties h = new Properties();
          > > > > h.put(Context.INITIAL_CONTEXT_FACTORY,
          > > > > "weblogic.jndi.WLInitialContextFactory");
          > > > > h.put(Context.PROVIDER_URL, "t3://localhost:7001");
          > > > > Context initial = new InitialContext(h);
          > > > > Object objref = initial.lookup("webmedx/pool");
          > > > > webmedxpoolhome =
          > > > >
          > > > >
          > >
          > (WebmedxPoolHome)PortableRemoteObject.narrow(objref,WebmedxPoolHome.class);
          > > > > }catch(Exception ex){
          > > > > Log.error(ex);
          > > > > }
          > > > > }
          > > >
          > >
          > >

Calling method from servlet

hi,
I want to call a method of an object that is available in a program already running, with parameters passed from the servlet.
How to do it .
Thanks.

Pls be patient with me. I tried my best and couldn't achieve what I want.
I provide the skeleton of what I have done and what I want to do.
I have my core part in /home/raja/Service/Core.java, the only java file in Service folder. When I compile it I get some four class files(which are used in Core.java file internally). I don't compile it as a package but as a single file.
I run the program in the same folder and in main method I use an infinite loop to keep the program running infinitely.
And I have a html as, usr/local/jakartaTomcat../webapps/servlets-examples/input.html. which simply gets an input string and submits to /servlet/Insert servlet class which is in ../servlets-examples/classes/Insert.class.
It put the string in DB which works fine. Also I made a package in ...servlet-examples/classes/Service in which I uploaded Core.java and compiled it and got the class files in it as a package.
In Insert class file I imported Service.*. In Insert class file I put a line like this. Core.putInPool(submittedString) which is a static method.
When I submit input.html , the string is put in DB, but it is not submitting to the program already running.
What I want to do is, I want to submit the string to the program that is running in /home/raja/Service/.
This is the program running in /home/raja/Service.
public class Core {
     static ThreadPool bc= new ThreadPool(10);
     public static void putString(String someStr) {
          bc.putInPool(someStr);
     public static void main(String args[]) throws InterruptedException {
          BufferedReader dataIn = new BufferedReader(new InputStreamReader( System.in) );
          while(true) {
               System.out.println("\f 1.Insert\n2.option2Enter Ur choice:");
               try{
                    ch = Integer.parseInt(dataIn.readLine());
                               String string="";
                    switch(ch) {
                         case 1: System.out.println("\nEnter the String:");
                              string = dataIn.readLine();
                              bc.putInPool(string);
                             .....In Insert.class servlet,
                                string = req.getParameter("userInputString");
                                out.println("Submitted");
                    Core.putInPool(string);

Calling SessionBean from Servlet

Hi ,
I am using Weblogic11g server .
In my application I am calling SessionBean (EJB3.0) from my servlet using MappedName#PackageName.RemoteBean Name , its working fine .
But Can you please tell me if i can use @EJB in servlets for this purpose .
Thanks in advance

for now that is server specific. I believe in the EJB 3.1 standard it is specified that you should be able to inject EJBs into servlets, but for now it is not mandatory. If any application server is able to do it, it would be Glassfish.

Calling Exe from Servlet

I need to call 1 exe from a servlet. I tried giving <FORM ACTION="Path for that Exe">
But its not working. Can't I call exe or any other file other than .class file ?
Help me out.

I need to call 1 exe from a servlet. I tried giving
<FORM ACTION="Path for that Exe">
But its not working. Can't I call exe or any other
file other than .class file ?
Help me out.Here goes my Code
import java.io.*;
import java.util.Hashtable;
import java.util.Date.*;
import javax.servlet.*;
import javax.servlet.http.*;
* Date Servlet
* This is a simple servlet to demonstrate server-side include
* It returns a string representation of the current time. And also client IP and Name
* @author
* 16 Oct. 2003
public class PrintDate extends HttpServlet{
     public void doGet(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException{
          response.setContentType("text/plain");
          PrintWriter out = response.getWriter();
          //ServletOutputStream out = response.getOutputStream();
          String host = request.getRemoteAddr();
          //out.println("I am printing the host:" + host);
          out.println("<HTML>");
          out.println("<HEAD></HEAD>");
          out.println("<BODY>");
          out.println("<FORM METHOD=get ACTION=/servlet/Kudremukh_pan>");
          out.println("<INPUT TYPE=text SIZE=15>");
          out.println("<INPUT TYPE=submit VALUE=submit>");
          out.println("</FORM></BODY></HTML>");

Calling URL from servlet

Hi!
I am trying to find a solution to this scenario:
1) A cron job will call a servlet.
2) Servlet calls a URL on remote server.
3) Remote server returns an XML document.
4) Servlet processes/parses the XML document.
5) Servlet stores XML fields into DB.
6) Servlet response (entry to log file) indicates status of transaction.
I'm stuck @ #2. What mechanism can I use to make a call to remote URL? I do not want the returning XML document to display on the client's browser; I want to process it on the back-end.
Thx!

http://java.sun.com/docs/books/tutorial/networking/urls/readingURL.html

Error in calling EJB from servlet

I've create a servlet as a client bean to call EJB
          I deploy the EJB, copy the servlet class (in .class format)
          (\config\<domain>\serverclass) and
          jsp to Weblogic 6.0
          When I run the JSP, It said that the EJB class not found.
          Please help
          Fannie


Additional information :
          I added the path where ejb jar file located to the calsspath in
          startWebLogic.sh
          Thanks!!
          Fannie
          Fannie <[email protected]> wrote in message
          news:3ac84447$[email protected]..
          > I've create a servlet as a client bean to call EJB
          > I deploy the EJB, copy the servlet class (in .class format)
          > (\config\<domain>\serverclass) and
          > jsp to Weblogic 6.0
          > When I run the JSP, It said that the EJB class not found.
          >
          > Please help
          >
          > Fannie
          >
          >
          >
          >

Unable to call EJB from servlet

Fillowing is my ejb module
package univesity;
import java.rmi.RemoteException;
import javax.ejb.*;
public interface EnrollmentCartHome extends javax.ejb.EJBHome
     EnrollementCartObject create() throws CreateException,RemoteException;
package univesity;
import java.rmi.RemoteException;
public interface EnrollementCartObject extends javax.ejb.EJBObject
     public void addCourse(int courseID) throws RemoteException;
package univesity;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
public class EnrollementCartEJBBean implements SessionBean
     int courseID;
     public void ejbActivate() throws EJBException, RemoteException {
          // TODO Auto-generated method stub
     public void ejbPassivate() throws EJBException, RemoteException {
          // TODO Auto-generated method stub
     public void ejbRemove() throws EJBException, RemoteException {
          // TODO Auto-generated method stub
     public void setSessionContext(SessionContext arg0) throws EJBException,
               RemoteException {
          // TODO Auto-generated method stub
     public void addCourse(int courseID)
          System.out.println("i am in add course");
          System.out.println("i am in add course--->"+courseID);
     public void ejbCreate() throws CreateException
          System.out.println("i am in ejbCreate");
          courseID=0;
}ejb-jar.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN"
          "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
          <jndi-name>ejb/EnrollmentCartHome</jndi-name>
<ejb-jar>
     <description>Simplest Statefull Session Bean</description>
     <display-name>University EJB</display-name>
     <enterprise-beans>
       <session>
         <ejb-name>Enrollement</ejb-name>
         <home>university.EnrollementCartHome</home>
         <remote>university.EnrollementCartObject</remote>
         <ejb-class>university.EnrollementCartEJBBean</ejb-class>
         <session-type>Statefull</session-type>
         <transaction-type>Bean</transaction-type>
       </session>
     </enterprise-beans>
</ejb-jar>here is my servlet
package university;
import javax.naming.InitialContext;
import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class EnrollCourse extends javax.servlet.http. HttpServlet
     public void doGet(HttpServletRequest req,HttpServletResponse res)
     public void doPost(HttpServletRequest req,HttpServletResponse res)
          try {
                    InitialContext ic = new InitialContext();
                    Object objRef = ic.lookup("ejb/EnrollmentCartHome");
                    university.EnrollementCartHome home=(university.EnrollementCartHome)javax.rmi.PortableRemoteObject.narrow(objref, university.EnrollementCartHome.class);
                    university.EnrollementCartObject obj=(university.EnrollementCartObject)home.create();
                    obj.addCourse(5);
          catch (Exception ex)
          { ex.printStackTrace(); }
}i am getting following error
java.lang.Error: Unresolved compilation problems:
     university.EnrollementCartHome cannot be resolved to a type
     university.EnrollementCartHome cannot be resolved to a type
     objref cannot be resolved
     university.EnrollementCartHome cannot be resolved to a type
     university.EnrollementCartObject cannot be resolved to a type
     university.EnrollementCartObject cannot be resolved to a type
     university.EnrollCourse.doPost(EnrollCourse.java:24)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

Thanks for your continuous reply
i solved all problems i have posted but now i am facing new problem that "EJB is already registerd"
giving you stack trace
15:21:22,109 WARN [ServiceController] Problem creating service jboss.j2ee:module=UniversityProjectEJBModule.jar,uid=22223562,service=EjbModule
javax.management.InstanceAlreadyExistsException: jboss.j2ee:jndiName=ejb/EnrollmentCartHome,service=EJB already registered.
     at org.jboss.mx.server.registry.BasicMBeanRegistry.add(BasicMBeanRegistry.java:761)
     at org.jboss.mx.server.registry.BasicMBeanRegistry.registerMBean(BasicMBeanRegistry.java:225)
     at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
     at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
     at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
     at org.jboss.mx.server.MBeanServerImpl$3.run(MBeanServerImpl.java:1422)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:1417)
     at org.jboss.mx.server.MBeanServerImpl.registerMBean(MBeanServerImpl.java:376)
     at org.jboss.ejb.EjbModule.createService(EjbModule.java:373)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:243)
     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)

Calling an applet from servlet

Hi
I'm devoloping a server side java software(on netbeans 6) and I want my gui classes(Designed as swing japplet application) to be executed on server side.
I mean I have database operations on my applet and some logging functions and I want them to execute on server side not client side
Is it possible to call applets from servlet and so its executed on server if it is possible how can i do that is there a tutorial for that ?
If it is not is there any other solution? Its really urgent for me
Thanks

tolgatanriverdi wrote:
I'm devoloping a server side java software(on netbeans 6) and I want my gui classes(Designed as swing japplet application) to be executed on server side.Call a company named Citrix, they do stuff like that using a special client.
I mean I have database operations on my applet and some logging functions and I want them to execute on server side not client sideSo it's not the GUI classes but the rest of the business logic.
Is it possible to call applets from servlet and so its executed on server if it is possible how can i do that is there a tutorial for that ?It's possible for a servlet to call any class. It's not easily possible for a servlet to connect to a certain applet instance running on a certain client, and neither should it. Hello - it's the server. It's supposed to answer to requests. It's not supposed to issue requests to the client. And considering your set-up as I understood it, you don't ned that anyway. Let the applet just tell the servlet to do action X or Y or Z.
Its really urgent for meGood Thing that you wrote it here. If you had written it at the beginning of your post, I wouldn't have bothered to answer.

Accessing an IFRAME tag after page being called from Servlet

Hi there, can anyone help me please.
I have two JSP pages, JSP1a and JSP2. When I call JSP1a from my browser, it runs some alert messages and then calls JSP2, which does a check on my database and then returns control to JSP1a and reloads the page. This all works fine.
I am now trying to integrate these two pages into my main app, but I get a problem. I am now calling JSP1a, from a controlling Java Servlet (my app is based around a Model 2 architecture) which fires fine, but the reference to the line
"window.frames.hidFrame.location.href=jsp2.jsp"
doesnt seem to work. "hidFrame" is an IFRAME in the body tag of my JSP1a page.
Can anyone help ? why does this line not fire, when the page has been loaded from a Java Servlet ? but it fires fine when I load the page directly ? and what is the solution to get around this problem please.
Thanks
Robert
JSP1a.jsp
<HTML>
<HEAD>
<SCRIPT language="JavaScript" type="text/javascript">
     function checkFunction(){
          var seconds = new Date();
          alert("inside function 1c ");
          window.frames.hidFrame.location.href = "jsp2.jsp";
     function retMessage(){
          alert("inside return function");
          window.location.reload(true);
</SCRIPT>
</HEAD>
<BODY onload="setTimeout('checkFunction()',5000);">
<p>this is JSP1a</p>
<SCRIPT language="JavaScript">
alert("inside main body");
</SCRIPT>
<IFRAME frameborder="0" id="hidFrame" style="display:none"></iframe>
</BODY>
</HTML>
JSP2.jsp
<%@ page import="java.util.*" %>
<jsp:useBean id="dbBean" scope="application" class="myApp.DbBean"/>
<HTML>

<%
boolean flag = false;
int i=1;
flag = dbBean.checkForUpdates();
System.out.println("flag = " + flag);
//if(flag == false) {
if (i == 1){
%>
     <BODY onload="parent.retMessage()">
<%} else {%>
     <BODY onload="parent.setTimeout('checkFunction()', 5000)">
<%}%>
</BODY>
</HTML>

its ok, I have found the problem. Someone recommended to me to change the IFRAME tag to make it visible just while I was debugging and low-and-behold there was a 404 error message being displayed which I had no idea about. It couldnt find my JSP2.jsp page. Because I am calling JSP1a from a servlet now, I needed to add a full path to my reference so that the servlet would know where to look. I did this and it works ok. I know its probably not best practice to hard code the full path to JSP2.jsp, I guess I should go back to the servlet and call JSP2 from there ?
Regards
Robert

I cannot log onto the App Store, the page appears when I call it from the dock or the Apple menu. I can call the log-in box from the menu bar, but on signing in the spinning icon just keeps spinning,(not the beachball). Any suggestions? Using 10.6.7 and u

I cannot log onto the App Store, the page appears when I call it from the dock or the Apple menu and I can call the log-in box from the menu bar, but on signing in the spinning icon just keeps spinning,(not the beachball). Using 10.6.7 and up-to-date on all software. Any suggestions?

Could be a third party app preventing you from being able to login.
Mac App Store: Sign in sheet does not appear, or does not accept typed text
If it's not a third party issue, follow the instructions here.
Quit the MAS if it's open.
Open a Finder window. Select your Home folder in the Sidebar on the left then open the Library folder then the Caches folder.
Move the com.apple.appstore and the com.apple.storeagent files from the Caches folder to the Trash
From the same Library folder open the Preferences folder.
Move these files Preferences folder to the Trash: com.apple.appstore.plist and com.apple.storeagent.plist
Same Library folder open the Cookies folder. Move the com.apple.appstore.plist file from the Cookies folder to the Trash.
Relaunch the MAS.

How can I display the HTML page from servlet which is called by an applet

How can I display the HTML page from servlet which is called by an
applet using the doPost method. If I print the response i can able to see the html document. How I can display it in the browser.
I am calling my struts action class from the applet. I want to show the response in the same browser.
Code samples will be appreciated.

hi
I got one way for this .
call a javascript in showDocument() to submit the form

Calling apps from servlet

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