Running JCORBA SAMPLE

Question

Hi:
I am trying to get the ServerStack example (the server portion)
and i successfully compiled the source code using
jdeveloper2.0.184 beta, made the Server.jar file and then tried
to add to the application and when i submit the command i get:
java.lang.NullPointerException
at
oracle.oas.beans.tools.descr.EJBJarToDescUtil.instantiateBeanDesc
riptor(EJBJarToDescUtil.java:551)
at
oracle.oas.beans.tools.descr.EJBJarToDescUtil.populateDescUtilFro
mManifest(EJBJarToDescUtil.java:96)
at
oracle.oas.beans.tools.descr.EJBJarToDescUtil.processEJBJar(EJBJa
rToDescUtil.java:89)
at
oracle.oas.beans.tools.descr.EJBJarToDescUtil.(EJBJarToDescUtil.j
ava:55)
at
oracle.oas.beans.tools.descr.JarUtil.processEJBJar(JarUtil.java:1
16)
at oracle.oas.beans.tools.descr.JarUtil.(JarUtil.java:58)
at
oracle.oas.beans.tools.config.Scanner.scan(Scanner.java:170)
at
oracle.oas.beans.tools.config.OASInstaller.generate(OASInstaller.
java:41)
at
oracle.oas.beans.tools.config.OASInstaller.main(OASInstaller.java
:24)
Registration failed!
I added the following jar files to the CLASSPATH:
i:\orant\ows\4.0\classes\cosnam.jar
i:\orant\ows\4.0\classes\wrbjidl.jar
i:\orant\ows\4.0\classes\services.jar
i:\orant\ows\4.0\classes\jcorba.jar
Are there other jar files that must be included in the classpath,
and where can i start debugging. Other than JCORBA my installatio
n is fine, i've gotten PL/SQL, PERL, JWEB running w/o problems.
thanks,
ted
null

Answer 1

Thanks, here is what i have:
using jar xf S1.jar i basically get (piped results):
META-INF/
META-INF/MANIFEST.MF
myStack/ServerStack.class
myStack/ServerStackRemote.class
myStack/StackException.class
META-INF/jco.app
I then exptracted the jco.app file using winzip to make sure
there's something in there in jco.app:
[APPLICATION]
name=myStack
[ServerStack]
className=myStack.ServerStack
remoteInterface=myStack.ServerStackRemote
[ServerStack.ENV]
initialStackSize=20
and in manifest.mf:
Manifest-Version: 1.0
Created-By: 1.2 (Sun Microsystems Inc.)
***** there must be something basic i am not getting
i am going through the documentation trying to figure
out how the jcorba works and so i can step through it manually
and debug. Any suggestions?
ServerStackRemote.java:
package myStack;
public interface ServerStackRemote extends
oracle.oas.jco.JCORemote
public int getStackSize();
public void setStackSize(int size)
throws StackException;
public void push(String value)
throws StackException;
public String pop()
throws StackException;
StackException Java:
package myStack;
public final class StackException extends Exception
public StackException()
ServerStack.java:
package myStack;
import oracle.oas.jco.*;
import java.util.Properties;
public class ServerStack implements Lifecycle
private int stackSize = 0;
private String stackElements[];
private int top = -1;
private ObjectManager mgr = null;
private Logger logger = null;
// Lifecycle method: This method is called by OAS after it
creates the
// JCO and registers it with the runtime. The JCO cannot create
an
// ObjectManager object in its constructor because it's not
registered
// with OAS yet.
public void jcoCreate()
mgr = ObjectManager.getObjectManager(this);
logger = mgr.getLogger();
logger.setSeverity(Logger.LOG_SEVERITY_DEBUG);
try {
Properties env = mgr.getEnvironment();
setStackSize(Integer.parseInt(env.getProperty("initialStackSize")
catch (Exception e) {
// Lifecycle method: This method is called by OAS just before
terminating
// a JCO. This can happen either because the client has invoked
the destroy
// method on an instance or the instance has timed out (in both
cases, the
// JCO must not be reusable or the jcoPassivate method is
called instead).
// Doing nothing special.
public void jcoDestroy() {
// Lifecycle method: This method is called by OAS if the client
has invoked
// the destroy method on an instance or the instance has timed
out, and the
// JCO is reusable.
// Throwing NonReusableException as the JCO is not reusable.
public void jcoPassivate()
throws NonReusableException
throw new NonReusableException();
// Lifecycle method: This method is called by OAS to activate a
JCO in the
// reusable pool for a client.
// JCO is not reusable, so this is not relevant.
public void jcoActivate() {
public int getStackSize()
logger.println(" Getting stack size...");
return stackSize;
public void setStackSize(int size) throws StackException
if (size < 0)
throw new StackException();
logger.println(" Setting stack size to " + size + "...");
top = -1;
stackSize = size;
stackElements = new String[size];
public void push(String value) throws StackException
if (top == stackSize - 1)
throw new StackException();
logger.println(" Pushing \"" + value + "\" onto the
stack...");
stackElements[++top] = value;
public String pop() throws StackException
if (top == -1)
throw new StackException();
logger.println(" Popping the stack (returning element " +
stackElements[top] + ")...");
return stackElements[top--];
JDeveloper Product Management (guest) wrote:
: Ted,
: You need a jco.app file that you can create, it should contain
: - Remote Interface
: - Specification of which CORBA Objects you wish to publish
: Federico
: ted (guest) wrote:
: : Hi:
: : I am trying to get the ServerStack example (the server
portion)
: : and i successfully compiled the source code using
: : jdeveloper2.0.184 beta, made the Server.jar file and then
tried
: : to add to the application and when i submit the command i
get:
: : java.lang.NullPointerException
: : at
oracle.oas.beans.tools.descr.EJBJarToDescUtil.instantiateBeanDesc
: : riptor(EJBJarToDescUtil.java:551)
: : at
oracle.oas.beans.tools.descr.EJBJarToDescUtil.populateDescUtilFro
: : mManifest(EJBJarToDescUtil.java:96)
: : at
: : oracle.oas.beans.tools.descr.EJBJarToDescUtil.processEJBJar
: (EJBJa
: : rToDescUtil.java:89)
: : at
: : oracle.oas.beans.tools.descr.EJBJarToDescUtil.
: (EJBJarToDescUtil.j
: : ava:55)
: : at
: : oracle.oas.beans.tools.descr.JarUtil.processEJBJar
: (JarUtil.java:1
: : 16)
: : at oracle.oas.beans.tools.descr.JarUtil.
: (JarUtil.java:58)
: : at
: : oracle.oas.beans.tools.config.Scanner.scan(Scanner.java:170)
: : at
: : oracle.oas.beans.tools.config.OASInstaller.generate
: (OASInstaller.
: : java:41)
: : at
: : oracle.oas.beans.tools.config.OASInstaller.main
: (OASInstaller.java
: : :24)
: : Registration failed!
: : I added the following jar files to the CLASSPATH:
: : i:\orant\ows\4.0\classes\cosnam.jar
: : i:\orant\ows\4.0\classes\wrbjidl.jar
: : i:\orant\ows\4.0\classes\services.jar
: : i:\orant\ows\4.0\classes\jcorba.jar
: : Are there other jar files that must be included in the
: classpath,
: : and where can i start debugging. Other than JCORBA my
: installatio
: : n is fine, i've gotten PL/SQL, PERL, JWEB running w/o
problems.
: : thanks,
: : ted
null