Execute Java class on startup of OC4J

So this might not even be possible in OC4J. But is there any way I can specify a Default Run Target for an OC4J container on an application server, similar to how you can specify a Default Run Target on JDeveloper. I want to execute a java class every time the OC4J server starts up.
But here's the basic issue:
1) I have a multi-threaded application that runs on an Oracle 10gR2 application server (in OC4J).
2) The program has an automated portion of it that runs in its own thread in the background - right now I manually launch this thread with a request to a servlet
3) When OC4J restarts (say for the monthly server reboot, etc) is there any way I can have OC4J launch that thread for me
Basically its encapsulated in a runner.class's main() which does all work of setting up the application. This way we don't have to manually do it. I've tried modifying the command line arguments in the IAS Console so that it does something like:
$ORACLEHOME/jdk/bin/java -classpath $ORACLE_HOME/j2ee/MyApp1/applications/MyApp1/webapp1/WEB-INF/classes:$ORACLE_HOME/jlib/MyStandard.jar -Djava.security.policy=/a0111/oracle/oraBI1/j2ee/MyApp1/config/java2.policy -Djava.awt.headless=true MyApp1.runner
However that leads me down class path hell of having to declare every class used by the OC4J container.
Thanks for all the help.

You can use a LifeCycle listener, which can be loaded using the configuration file. I forget the exact XML element, but it's available in virtually every level of the configuration.
However with a stub for native code the usual trick is to load the library in a static initializer, which will cause it to be loaded the first time the class is actively used. That's less hastle.

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Problem while trying to execute Java class in JSP using RunTime Class

Hi,
I want to execute a JAVA class through a JSP. For this I am using following code ....
JSP (AAA.jsp) CODE ............
try
String[] cmd = new String[3];
cmd[0] = "cmd.exe" ;
cmd[1] = "/C" ;
cmd[2] = "java -DPeBS_CONFIG_HOME=D:/CASLIntegration/PeBS/srcvob/PeBS/config Service_Statement_Application 22/May/2001 22/May/2003";
Runtime rt = Runtime.getRuntime();
System.out.println("Execing " + cmd[0] + " " + cmd[1] + " " + cmd[2]);
Process proc = rt.exec(cmd);
// any error message?
StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
// any output?
StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
// kick them off
errorGobbler.start();
outputGobbler.start();
// any error???
int exitVal = proc.waitFor();
System.out.println("ExitValue: " + exitVal);
catch (Throwable t)
t.printStackTrace();
StreamGobbler THread class Code ..........
import java.util.*;
import java.io.*;
public class StreamGobbler extends Thread
InputStream is;
String type;
StreamGobbler(InputStream is, String type)
this.is = is;
this.type = type;
public void run()
try
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line=null;
while ( (line = br.readLine()) != null)
System.out.println(type + ">" + line);
} catch (IOException ioe)
ioe.printStackTrace();
I have successfully compiled and placed the class file for the above class in JSP's servlet engine. However, when I execute the JSP through explorer Web Browser, I get following compile time error:
An error occurred between lines: 36 and 86 in the jsp file: /casl/LocalApp/VehicleServiceStmt/AAA.jsp
Generated servlet error:
D:\Tomcat\work\localhost\_\casl\LocalApp\VehicleServiceStmt\AAA$jsp.java:118: No constructor matching StreamGobbler(java.io.InputStream, java.lang.String) found in class StreamGobbler.
StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
^
An error occurred between lines: 36 and 86 in the jsp file: /casl/LocalApp/VehicleServiceStmt/AAA.jsp
Generated servlet error:
D:\Tomcat\work\localhost\_\casl\LocalApp\VehicleServiceStmt\AAA$jsp.java:121: No constructor matching StreamGobbler(java.io.InputStream, java.lang.String) found in class StreamGobbler.
StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
I am unable to determine the reason of why the constructor which exists in the StreamGobbler Class is not recevied in JSP. If I try to write the same code in JSP as a JAVA class, keeping StreamGobler class same, the programme executes successfully.
Please help me find solution to this at the earliest. Thanks in advance,
Prachi

Thanks,
I got it working by making the constructor Public.
-Prachi

Unable to execute java class.

HI !
I have got a very weird problem .I have wrritten a simple java program Hello world using Weblogic workshop.As required I'm saving this file in the package folder and executing it .I have set the home directories properly .My code is :
package java1;
public class hello
public static void main(String[] args)
System.out.println("Hello World");
After I compile I get the foolowing in the o/p window :
Trying to attach to 3218...
Starting process in C:\bea\myprojects
C:\bea\jdk141_02\bin\javaw.exe -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=3218,suspend=y,server=y -classpath myprojects.proj1.java1.hello
Usage: javaw [-options] class [args...]
(to execute a class)
or javaw -jar [-options] jarfile [args...]
(to execute a jar file)
where options include:
-client     to select the "client" VM
-server     to select the "server" VM
-hotspot     is a synonym for the "client" VM [deprecated]
The default VM is client.
-cp -classpath <directories and zip/jar files separated by ;>
set search path for application classes and resources
-D<name>=<value>
set a system property
-verbose[:class|gc|jni]
enable verbose output
-version print product version and exit
-showversion print product version and continue
-? -help print this help message
-X print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
enable assertions
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
disable assertions
-esa | -enablesystemassertions
enable system assertions
-dsa | -disablesystemassertions
disable system assertions
I dont know what to do ? Do I have to set any paths or any thing ? It is not required to set the class path here.
Please Help.
Thanks in advance.

try to compile your programm from command prompt
change dir to hello.java directory
to compile programm type:
javac hello.java
if it will compile successfully run it by typing
java hello
if it will not be helpfull uninstall JDK 1.4 and instal JDK again. I'd recomend JDK 1.5.

Can i give a process name of executing java class

hi all,
what i need is when i execute the class file using java at the command prompt i want to create a separate process of that class. that means when i execute this class i want 2 processes running one is "java" and the other is "The Class To be executed".
is it possible????
actually my requirement is that i want only one instance of my class can run at a time.
please help me
thanks
bye

hi
actually i can not use the file lock because my application is going to run on Solaris machine and since its a mutiuser platform and every user has a limited access to his data.and any user can run my application so the problem is where one user will write into a file so that other user can also read from the same file.
can i do it other way using native methods if yes can u elaborate please
thanks
bye

Executing java.class files

From julesh1
To whom may help me:
I'm new to java.
I'm currently using jdk1.4.
I can compile File.java just fine.
But when i try to execute File.class i get an error message saying
java.lang.noclassDefFoundError.
This did not happen before.
any help would greatly be appreciated.

when you receive that error it usually indicates that the CLASSPATH does not include the directory where you are saving your .class files. If you are using Windows 2000, you need to:
1. Right click on My Computer
2. Go to properties
3. Click on the Advance tab
4. Click on Environment Variables
5. Edit or create a new variable named ClassPath and type in something similar to this:
.;C:\java;C:\jdk1.3.1;
If you have Windows 95 or 98,
Click on Start, then Run and type in sysedit, then click OK.
Go to the AUTOEXEC.BAT file which usually is the first file to pop up. Type:
SET CLASSPATH=.;C:\jdk1.3.1\classes;c:\java
In the above . is the current directory; c:\jdk1.3.1\classes is a place where you can store your class files; c:\java is a directory I created on my hard drive where I store my class files..
I hope this helps,
Kent

Executing java class through servlet

Hi,
I am facing one problem and would be glad if I could get an input.
I'm working on admin module and want to execute some java program which may take 10mins. for execution through either JSP or Servlet. DO any of you know how this could be done ?
thanks
Amit.

Do you mean that you want to run a Java class from a servlet and wait till that class finishes off?

Scheduled job throws Class Not Found error when executing Java class

Hi,
I have written a java class to carry out a file upload to an external site and put the class on our server.
I also wrote a script to call this java class, passing inthe relevant parameters.
If i call the script using the ./ syntax from SSH it runs file logged in as Root and Oracle.
I the setup a scheduled job to call this script but the job fails with the error...
STANDARD_ERROR="Exception in thread "main" java.lang.NoClassDefFoundError: HttpsFileUpload Caused by: java.lang.ClassNotFoundException: HttpsFileUpload at java.net.URLClassLoader$1.run(URLClassLoader.java:"I cannot understand why it is raising the error if it runs from SSH.
O/S = Red Hat Enterprise Linux ES, oracle version = 10.2.0.1.0
Any help or guidance would be appreciated
Thank you in advance
Graham.
Edited by: gpc on Feb 4, 2009 12:46 PM

Hi,
See this link for some tips if you haven't yet :
Guide to External Jobs on 10g with dbms_scheduler e.g. scripts,batch files
I can think of two things. Your script may not be able to run as the nobody user (by default external jobs run as the nobody user). Or your script might require that some environment variable be set (by default environment variables are not set in external jobs).
Maybe you need to set the CLASSPATH variable in your script before calling java ?
Hope this helps,
Ravi.

Execute java class from a batch file called from runtime.exec

Hi.
I don´t know if this question fits here.
I wan´t to execute a batch file (on Win XP) with runtime.exec. That batch file will execute another java program.
I have the following code:
Resolutor.java
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Resolutor {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          Runtime r = Runtime.getRuntime();
          //String[] command = { "cmd.exe", "/C",".\\lanzar.bat .\\ .\\ 001.res:001.dtt" };
          String[] command = { "cmd.exe", "/C",".\\tarea\\lanzar.bat " + args[0] + " " + args[1] + " " + args[2]};
          try {
               //Process proceso = Runtime.getRuntime().exec("lanzar.bat");
               Process proceso = Runtime.getRuntime().exec(command);
               InputStream stderr = proceso.getErrorStream();
            InputStreamReader isr = new InputStreamReader(stderr);
            BufferedReader br = new BufferedReader(isr);
            String line = null;
            System.out.println("<ERROR>");
            while ( (line = br.readLine()) != null)
                System.out.println(line);
            System.out.println("</ERROR>");
               int exitVal = proceso.waitFor();
               System.out.println("EXITVAL: " + exitVal);
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (InterruptedException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
}lanzar.bat
java Lanzador %1 %2 %3Lanzador.java
import java.util.Vector;
public class Lanzador {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          Repetitiva rpt=new Repetitiva();
          String rutaFicheros=args[0];
          String rutaResultado=args[1];
          String[] ficheros=args[2].split(":");
          Vector<String> ficheroDatos=new Vector<String>();
          for(int i=0;i<ficheros.length;i++){
               ficheroDatos.add(ficheros);
               System.out.println(ficheros[i]);
          System.out.println("RUTA DE FICHEROS: " + rutaFicheros);
          System.out.println("RUTA DE RESULTADOS: " + rutaResultado);
          System.out.println("CALCULAR");
          rpt.setRepetitiva(ficheroDatos, rutaFicheros, rutaResultado);
          rpt.calcular();
}I´ve got Resolutor.class in /res and the other two files (and the rest of the files for running) in /res/tarea.
If I execute /res/tarea/lanzar.bat from the command line everything works fine, it calls java and runs lanzador without problem.
The problem comes when I try to execute the batch file via Resolutor.class. It executes the batch file without problem, but it throws a *java.lang.NoClassDefFoundError: Lanzador* when launching the new java application.
Any ideas of how can I solve that problem. (It must do it via batch file).

Well, I tried putting in the bat file java -classpath .\tarea Lanzador %1 %2 %3 and didn´t work.
I ve tried the bat modification, and the directory in x.txt is k:\res instead of k:\res\tarea.
I´ve tried to modifiy it to java .\tarea\Lanzador and didn´t work so I have put a cd like the following and it appears to work.
cd tarea
java Lanzador %1 %2 %3Thanks for the replies.

Java class call from form

Hi
I'm doing single sign on via cookie and I able to get the cookie value and for decrypting I loaded java classes on the back end, When I called via form the jvm is crashing with some frm-92101 error.
First I want if anybody can help if I have to run any packages to execute java class from forms, I already created pl/sql wrapper class.
When I execute the function on the backend and got the decrypted value via pl/sql wrapper package but from forms the web servver is crashing, Can any body help.
Also where do I see the log file location.
Thanks in advance for the pro's for helping me
Thanks
Murthy

Dump from the application file.
08/06/23 14:21:58 formsweb: Forms session <10> exception stack trace:
java.io.IOException: FRM-93000: Unexpected internal error.
Details : No HTTP headers received from runform
     at oracle.forms.servlet.ListenerServlet.forwardResponseFromRunform(Unknown Source)
     at oracle.forms.servlet.ListenerServlet.doPost(Unknown Source)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:285)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:126)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
08/06/23 14:52:17 formsweb: Forms session <11> aborted: unable to communicate with runtime process.
08/06/23 14:52:17 formsweb: Forms session <11> exception stack trace:
java.io.IOException: FRM-93000: Unexpected internal error.
Details : No HTTP headers received from runform
     at oracle.forms.servlet.ListenerServlet.forwardResponseFromRunform(Unknown Source)
     at oracle.forms.servlet.ListenerServlet.doPost(Unknown Source)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:285)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:126)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
08/06/23 15:03:21 formsweb: Forms session <12> aborted: unable to communicate with runtime process.
08/06/23 15:03:21 formsweb: Forms session <12> exception stack trace:
java.io.IOException: FRM-93000: Unexpected internal error.
Details : No HTTP headers received from runform
     at oracle.forms.servlet.ListenerServlet.forwardResponseFromRunform(Unknown Source)
     at oracle.forms.servlet.ListenerServlet.doPost(Unknown Source)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:285)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:126)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
08/06/23 15:08:21 formsweb: lservlet: destroy
08/06/23 15:08:21 formsweb: Stopped
08/06/23 15:08:21 Stopped (Shutdown executed by jazn.com/admin from 127.0.0.1 (localhost))

How to call Java class from Forms 6i?

Hi friends,
I need to call a Java class from my Forms 6i application.
(It runs under WIndows XP. It's a client/server application and I have only the client and the Form builder installed on my PC)
I don't know almost anything about Java's world so your help would be very useful for me.
Could you tell me exactly what i have to do?
I've read in metalink several Notes, but they supposed that the Java architecture is already installed in the computer.... I only have the default installation of Developer 6i... so I would need to know:
- How to install/configure the neccesary to execute Java classes without problem
- How to invoke the .class from Forms 6i.
Thanks a lot
Jose.

And also this one:
Problem Description
Installed Forms 6i Rel 2 on a MS Windows machine. When trying to Import the Java
Classes getting the errors
PDE-UJI0001 Failed to create the JVM
Solution Description
You need to to install JDK 1.2.2 to run the Java Importer. And set the PATH's
and classpath's correctly.
Explanation
1. Download and install the JDK 1.2.2.
Possibly available at: http://java.sun.com/products/archive/
2. Assuming the JDK 1.2.2 is installed in c:\jdk1.2.2 directory and the JRE in
C:\PROGRA~1\JAVASOFT\JRE\1.2 directory; ORACLE_HOME=C:\Dev6iR2.
Set the PATH to
set PATH=c:\jdk1.2.2\bin;C:\PROGRA~1\JAVASOFT\JRE\1.2\bin;C:\PROGRA~1\JAVASOFT\JRE\1.2\bin\classic;%PATH%
( If you are using ias9i then the JDK 1.2.2 comes with the ias installtion ,
in this case please set the PATH to
D:\ias9i\Apache\jdk\bin;D:\ias9i\Apache\jdk\jre\bin;D:\ias9i\Apache\jdk\jre\bin\classic;%PATH% )
3. Set the CLASSPATH to set CLASSPATH=%CLASSPATH%;C:\Dev6iR2\TOOLS\COMMON60\JAVA\IMPORTER.JAR;.
(If you do not set the CLASSPATH correctly you will get the error
PDE-UJI002 Unable to find the required java importer classes)
4. Now run the Forms Builder by using the command.
C:\Dev6iR2\bin\ifbld60.exe
Now the Java Importer Should Run fine.
Francois

Why Java class on 1.4.0 don't work with javascript?

Why when I recompile my Java class on 1.4.0 version, I can't use javascript for execute java class methods or fields?
Thanks

This is a ultimate stable version. Beta version are 1.4.1.
About applet malfunction, refine the problem, recompile with "target -1.1" and check if it runs fine. I believe this is the root of problem.
(I speak in portuguese and japanese...LOL)

Executing a java application during startup

{color:#0000ff}Hi
Can anybody help me how to execute a java program during startup?
Is there any java inbuilt codes to execute the program in startup?{color}

hi,
just create the java file and compile it in to .class file.
create a batch file (open notepad write these commands.
cd directory name where your java class is
java classname
then go to control panel and click on schedule tasks and schedule this .bat file at system startup.
it will run......

How to invoke a java class during UCM 10gR3 startup ?

I am integrating AD4J (Application Diagnostic for Java) with UCM (Universal Content Management , earlier stellent) to monitor my UCM's JVM.
This is very simple configuration where I have to add java class (jamagent.jamrun) in my UCM's startup program. This class (jamagent.jamrun) is in zip file ad4jagent.zip which I have added in classpath via intradoc.cfg
JAVA_CLASSPATH_ad4j=$SHAREDDIR/classes/jamagent.zip
Issue now is that I am unable to find java [content_server_startup_class] so can't add class jamagent.jamrun .
As per my understanding : idcserver_start -> idcserver_ctr -> Launcher.sh -> Launcher (This launcher is executable)
I am unable to understand where or how can I invoke jamagent.jamrun class with my UCM startup ?

Java-code in a custom component could be triggering on a filter event that occurs during the startup of UCM, like extraAfterConfigInit. Would that be sufficient for loading yourAD4J?
Other than that, it is my understanding that every jar that you put in the classes folder of UCM is loaded on startup.
I hope this helps.
Regards,
Wim

How can I execute a java class with arguments from an air application built from mxml?

I have an mxml application. It has a button, and when that button select event occurs, I want my mxml air app to pass arguments to a java class I have built, which resides in a package path on my system. I need to be able to pass several arguments to my java method from my mxml call. How do I do this, and what config files are necessary? For the simple task I want to engineer, can you show me an example of a properly configured config file? My java class has been executed at the command line in the past as follows:
java -cp %CP% com.abc.prism.queue.EmitMessage XYZ "my message text" 192.12.13.14 5672
where %CP% is an env variable that tells my class the classpath it runs with, and XYZ, "my message text", the IP address, and the port are the arguments I must pass from mxml to my java class. How do I accomplish this?
How do I make known to the java class I call from mxml the %CP% class path? It tells my java class where to find various rabbitMQ jars.

Hi,
You need to use Integration technology like BlazeDS or LCDS.

Executing a java class in Integrator

I have to execute a java class in Endeca Integrator. How must I go about doing this? Can i use the JavaExecute component? If yes, are there any examples of the syntax of this java class. The document states that the transformation attributes must implement a JavaRunnable interface. Can someone provide me examples of such a java class. Please help
Thanks

Take a look at this page in the Clover documentation: Help - Eclipse . It has some details on the API methods of JavaExecute.

Execute Java class on startup of OC4J

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