Unable to access EJB with servlet as client

Hi,
I am Naga, a java developer trying to work with Weblogic6.1 at present.
When i try to use Servlet as a client to my EJB, I am getting an error
saying that Home class not found.
i have kept the Servlet class file under
E:\bea\wlserver6.1\config\mydomain\applications\DefaultWebApp\WEB-INF\classe
s
folder.
i mentioned the EJB-ref tags in web.xml too, But it is not working.
How to make the EJB home and remote interfaces visible to Servlet with
weblogic6.1 ?
If i put the EJB.jar file under
E:\bea\wlserver6.1\config\mydomain\applications\DefaultWebApp\WEB-INF\lib
directory the application is working. Is this is the only way to do ?
After reading the article "EJB 2 and J2EE Packaging, Part II" at http://www.onjava.com/pub/a/onjava/2001/07/25/ejb.html,
i came to know that their is another way to do this, but i could not get it properly.
If any one could explain about the series of steps involved, that would be
really great and appreciated.
Thanks in advance
Naga.

Hi Naga,
If webApp and EJB are deployed as separate components,then you need to have EJB
classes in WEB-INF/classes of your webApp.
If the app is in EAR format then the servlet can see the EJb classes directly.
Thanks,
Vijay
"Nagamahesh" <[email protected]> wrote:
>
Hi,
I am Naga, a java developer trying to work with Weblogic6.1 at present.
When i try to use Servlet as a client to my EJB, I am getting an error
saying that Home class not found.
i have kept the Servlet class file under
E:\bea\wlserver6.1\config\mydomain\applications\DefaultWebApp\WEB-INF\classe
s
folder.
i mentioned the EJB-ref tags in web.xml too, But it is not working.
How to make the EJB home and remote interfaces visible to Servlet with
weblogic6.1 ?
If i put the EJB.jar file under
E:\bea\wlserver6.1\config\mydomain\applications\DefaultWebApp\WEB-INF\lib
directory the application is working. Is this is the only way to do ?
After reading the article "EJB 2 and J2EE Packaging, Part II" at http://www.onjava.com/pub/a/onjava/2001/07/25/ejb.html,
i came to know that their is another way to do this, but i could not
get it properly.
If any one could explain about the series of steps involved, that would
be
really great and appreciated.
Thanks in advance
Naga.

Similar Messages

Unable to access EJB from servlet

Hi,
I have in service method my servlet code.
Hashtable env = new Hashtable();
 env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.ApplicationInitialContextFactory");
 env.put(Context.PROVIDER_URL, "ormi://localhost/hello");
 env.put(Context.SECURITY_PRINCIPAL, "admin");
 env.put(Context.SECURITY_CREDENTIALS, "mypwd");
 Context ctx = new InitialContext(env);
 Object obj = ctx.lookup("HelloName");
 HelloHome home = (HelloHome) javax.rmi.PortableRemoteObject.narrow(obj, HelloHome.class);
 Hello hello = home.create();
this is how i have orion-ejb-jar.xml
 <enterprise-beans>
 <session-deployment name="Hello" location="HelloName" >
 </session-deployment>
 </enterprise-beans>
 ejb-jar.xml
 <session>
 <ejb-name>Hello</ejb-name>
 <home>examples.HelloHome</home>
 <remote>examples.Hello</remote>
 <local-home>examples.HelloLocalHome</local-home>
 <local>examples.HelloLocal</local>
 <ejb-class>examples.HelloBean</ejb-class>
 <session-type>Stateless</session-type>
 <transaction-type>Container</transaction-type>
 </session>
When i access the servlet i get this error.
javax.naming.NameNotFoundException: HelloName not found
 at com.evermind.server.rmi.RMIContext.lookup(RMIContext.java:149)
 at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:217)
 at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:88)
 at javax.naming.InitialContext.lookup(InitialContext.java:345)
 at examples.HelloServlet.service(Unknown Source)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:772)
 at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:317)
 at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:782)
 at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)
 at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
 at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
 at java.lang.Thread.run(Thread.java:479)
Is location attribute in orion-ejb-jar.xml used to specify JNDI name? Can i get the JNDI tree showing the name mappings in oc4j? How do i correct this error?
Ravi

Ravi --
The most portable and standards oriented solution is to define an ejb-ref in the web.xml for the servlet, and then look up the name using the formal EJB UNC model.
web.xml:
<ejb-ref>
<ejb-ref-name>ejb/AppSessionFacadeHome</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<home>faqapp.ejb.AppSessionFacadeHome</home>
<remote>faqapp.ejb.AppSessionFacade</remote>
</ejb-ref>
servlet lookup
InitialContext ctx = new InitialContext();
Object homeObject = ctx.lookup("java:comp/env/ejb/AppSessionFacadeHome");
EJBHome ejbHome = (EJBHome)
portableRemoteObject.narrow (homeObject, AppSessionFacadeHome.class);
cheers
-steve-

Access EJB from Servlet that in different archive?

package kyro.ejb.session;
import javax.ejb.*;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless(name="StandAlone")
@Remote(StandAlone.class)
public class StandAloneBean
implements StandAlone, StandAloneLocal
public StandAloneBean() {
public String sayHello() {
return "sayHello";
I want to access ejb from servlet that .war and .jar not in single .ear. I want to try that just with annotation not xml descriptor cause is easy to understand for me. I use Glassfish. But i can't lookup that ejb. How can i lookup that ejb with jndi? Can't you give me example of servlet to access that? I not use JNDI.properties, are that caused i can't access my ejb? I just thing .war and.jar in one server, are i have to used JNDI.properties. can you explain how to use JNDI.properties in servlet or separate file?


But i can't lookup that ejb. How are you trying and what exception is occurring?
How can i lookup that ejb with jndi? [https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html|https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html]
m

Accessing EJB's from CORBA clients

Hi!
Can someone answer one badly important question?
Is it possible to access EJB's from CORBA clients directly, as if the
beans were ordinary CORBA objects? I mean DIRECT access - WIDHOUT
CORBA/Java server application as a liason between CORBA client and EJB
server!
I'm using WebLogic Enterprise 5.0.1.
Thanks in advance.
Aleksey.

Please reference a later posting on this very same question.
-- Lou Caraballo
Sr. Systems Engineer
BEA Systems Inc., Denver Telco Group
719-332-0818 (cell)
720-528-6073 (denver)
Aleksey Bukavnev <[email protected]> wrote in message
news:[email protected]..
Thank you!
Aleksey.
Bill Lloyd wrote:
There is a java to IDL mapping, which is quite complex. To use it, you
must
have an ORB which supports, at minimum, CORBA 2.3. ORBs I know of which
support this include Orbix 2000 for Java, Visibroker 4.0 for Java, and
Orbacus 4.0 for Java.
Also, check out the June 2000 "Java Report" which has an article onthis.
>>
To be perfectly honest, though, the best solution is to write a bridge,in
Java. One side is IDL, which CORBA clients use. The implementation ofthat
IDL makes RMI requests to get the necessary info. This solution willwork,
guaranteed. The portion of the spec for the java to IDL mapping isstill
quite new, and I would expect some, uh, "unexpected features" at thistime.
>>
-B
"Aleksey Bukavnev" <[email protected]> wrote in message
news:[email protected]..
Hi!
Can someone answer one badly important question?
Is it possible to access EJB's from CORBA clients directly, as if the
beans were ordinary CORBA objects? I mean DIRECT access - WIDHOUT
CORBA/Java server application as a liason between CORBA client and EJB
server!
I'm using WebLogic Enterprise 5.0.1.
Thanks in advance.
Aleksey.

I unable to run ejb with application client using oc4j j2ee container

Hi,
I have installe oracle9i (1.0.2.2) oc4j j2ee container.
I unable to run the ejbs . please help me how to run ejbs with application client and which files are shall configure.
See the client application is :
public static void main (String []args)
try {
//Hashtable env = new Hashtable();
//env.put("java.naming.provider.url", "ormi://localhost/Demo");
//env.put("java.naming.factory.initial", "com.evermind.server.ApplicationClientInitialContextFactory");
//env.put(Context.SECURITY_PRINCIPAL, "guest");
//env.put(Context.SECURITY_CREDENTIALS, "welcome");
//Context ic = new InitialContext (env);
System.out.println("\nBegin statelesssession DemoClient.\n");
Context context = new InitialContext();
Object homeObject = context.lookup("java:comp/env/DemoApplication");
DemoHome home= (DemoHome)PortableRemoteObject.narrow(homeObject, DemoHome.class);
System.out.println("Creating Demo\n");
Demo demo = home.create();
System.out.println("The result of demoSelect() is.. " +demo.sayHello());
}catch ( Exception e )
System.out.println("::::::Error:::::: ");
e.printStackTrace();
System.out.println("End DemoClient....\n");
When I am running client application I got this type of Exception
java.lang.SecurityException : No such domain/application: sampledemo
at com.evermind.server.rmi.RMIConnection.connect(RMIConnection.java : 2040)
at com.evermind.server.rmi.RMIConnection.connect(RMIConnection.java : 1884)
at com.evermind.server.rmi.RMIConnection.lookup(RMIConnection.java : 1491)
at com.evermind.server.rmi.RMIServer.lookup(RMIServer.java : 323)
at com.evermind.server.rmi.RMIContext.lookup(RMIConext.java : 106)
at com.evermind.server.administration.LazyResourceFinder.lookup(LazyResourceFinder.java : 59)
at com.evermind.server.administration.LazyResourceFinder.getEJBHome(LazyResourceFinder.java : 26)
at com.evermind.server.Application.createContext(Application.java: 653)
at com.evermind.server.ApplicationClientInitialContext.getInitialContext(ApplicationClientInitialContextFactory.java :179 )
at javax.naming.spi.NamingManager.getInitialContext(NamingManger.java : 246)
at javax.naming.InitialContext.getDefaultInitialCtx(InitialContext.java : 246)
at javax.naming.InitialContext.init(InitialContext.java : 222)
at javax.naming.InitialContext.<init>(InitialContext.java : 178)
at DemoClient.main(DemoClient.java : 23)
.ear file is copied into applications directory.
I have configured server.xml file like this
<application name="sampledemo" path="../applications/demos.ear" />
demos.ear file Contains following files
application.xml
demobean.jar
Manifest.mf
demobean.jar file contains following files
application-client.xml
Demo.class
DemoBean.class
DemoHome.class
ejb-jar.xml
jndi.properties
Mainifest.mf
Please give me your valuable suggestions. Which are shall i configure .
Thanks & Regards,
Badri

Hi Badri,
ApplicationClientInitialContextFactory is for clients which got deployed inside OC4J container..
For looking up EJB from a stand alone java client please use RMIInitialContextFactory..So please change ur code....
Also please check ur server.xml
Since you have specified your ejb domain as "sampledemo"
you have to use that domian only for look up..But it seems that you are looking up for "Demo" domain instead of "sampledemo" domain...So change your code to reflect that..
Code snippet for the same is :
Hashtable env = new Hashtable();
env.put("java.naming.provider.url", "ormi://localhost/sampledemo");
env.put("java.naming.factory.initial", "om.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "guest");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
Context ic = new InitialContext (env);
Hope this helps
--Venky

Security exception while trying to access EJB from stand alone client

Hi!, I am trying a sample EJB application to R&D some security related issues. I want to access EJB through a web application as well as a stand-alone client. I have set approriate <method-permission> in EJB deployment descriptor. I am using users.properties/roles.properties file for authentication mechanism. I am using JBoss 3.2.
- On the web application side I am using BASIC authentication and the servlet is able to access the EJB OK, as long as I am using a login/password that has access to the EJB.
- Now I am trying to access the EJB using a stand alone Java class. These are the things I have tried till now:
=>Created a InitialContext with appropriate principal, credentials and tried getting a reference to EJB home interface. That resulted in security exception.
=>Logged into a LoginContext by using appropriate JBossSX classes and then tried getting a EJB home interface. Again security exception.
Now I am not sure what to do. I read at some places about client side container but not sure what that is. Does anyone has any ideas to try? Is there any other way I can make a swing application and a web application authenticate to EJB container?
Also can anyone point me to any documentation that gives some idea about how the security credentials gets propagated from web application/standalone client to EJB container?

It would be better if you can post your code...and DD that way we can help you better

Shutdown class; unable to access EJBs/JDBC

I have a fundamental question here, and for which I have not found any documentation
on BEA's own documentation center.
Can I, or can I not invoke operations on EJBs/JDBC/JNDI etc from my implementation
of weblogic.common.T3ShutdownDef??
Startup classes can in general access all resources, and they can also invoke
services on EJBs if LoadBeforeAppDeployments is false (the default) in config.xml.
However, the same does not seem to be true for shutdown classes. I am unable to
access services from a shutdown class.
As soon as I invoke weblogic.Admin with SHUTDOWN as the command, the server transitions
to STANDBY state and then the shutdown class is invoked.
The session bean is found and available, but when a transaction is sought to be
created to execute a finder on an EntityBean within the SessionBean, I get an
exception that transactions cannot be created in the Standby state of the server.
To get around this, I thought I will get a reference to the DataSource from JNDI
and execute a query on the JDBC connection, and that failed as well, saying that
JDBC connections are also not available.
Am I doing something wrong here? Or is this a bug.
I am developing on WLS 7.0.
Thanks!
Vivek.

quote:
Please help me understand why. I have the easeToLoc setup to
received input variables:
The syntax of ActionScript dictates that you refer to the
callback function in the way that I pointed out. The only argument
that is passed to that listener function is an event object. This
is what it expects, nothing more. Take a look at the
docs
for more info, specifically the categories under Programming
ActionScript 3.0 -> Handling Events.
Looking at navPanelClose() and navPanelOpen(), the values
you're trying to pass seem more like constants to me, not
variables. So why not declare them as constants within this class
and refer to them as such within easeToLoc()? If you truly want to
use variables, perhaps creating a separate utility class to handle
this logic will work better.
When trying to access a method within one class from another
...let's say you want to access myMethod() within class MyAClass
from class MyBClass. You could:
1. Declare myMethod() as static and then refer to it from
anywhere after importing MyAClass. So you can call
MyAClass.myMethod() without having to instantiate MyAClass. This is
what you're trying to do here, I think.
2. Have class MyBClass extend MyAClass where myMethod() is
public or protected and MyBClass is in the same package as MyAClass
when it's declared as protected. For this to work you'd have to
instantiate MyBClass.
TS

How to run EJB with JSP as client on TOMCAT - JBOSS server

Hi all,
I am having my EJB component successfully deployed on JBOSS server. My core-java client is able to access the same. But when I use the JSP page which is on Tomcat server, I am getting following exception. Please help me out.
Exception Report:
org.apache.jasper.JasperException: sealing violation
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.load(JspServlet.java:125)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:161)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:171)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:328)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:407)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:251)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:196)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2041)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
     at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:414)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:818)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:897)
     at java.lang.Thread.run(Thread.java:484)
Root Cause:
java.lang.SecurityException: sealing violation
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:234)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at org.apache.catalina.loader.StandardClassLoader.findClass(StandardClassLoader.java:648)
     at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:987)
     at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:906)
     at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:136)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
     at java.lang.Class.newInstance0(Native Method)
     at java.lang.Class.newInstance(Class.java:237)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.load(JspServlet.java:123)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:161)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:171)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:328)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:407)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:251)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:196)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2041)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
     at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:414)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:818)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:897)
     at java.lang.Thread.run(Thread.java:484)
Please let me know what the problem is as I am new to EJB.
Thanx a lot
Unmesh

Hi
Even i have the same problem...
i have deployed the ejb in jboss..
but i cannot even run the core-java client program
can u pls mail me the code...
and the directory path
thanks a lot
cheers
simreen

Problem accessing ejb from servlet

Hi,
I'm aving a problem accessing a stateful session bean from a servlet. I'm using a jndi lookup to do it because I need that a client has its own bean reference...
My code into the service method is:
InitialContext ctx;
try {
ctx = new InitialContext();
carrelloService = (CarrelloLocal)ctx.lookup("java:comp/env/ejb/Carrello");
and I have a reference to EJB into web.xml:
<ejb-local-ref>
<ejb-ref-name>ejb/Carrello</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<local-home></local-home>
<local>carrello.model.CarrelloLocal</local>
</ejb-local-ref>
If I use @EJB annotation to inject the servlet, it works fine.
Instead using jndi lookup throws a NamingException because it doesn't find java:comp/env/ejb/Carrello entry.
Any idea about the problem?

Here's something simple that I have that works:
 
SimpleBean
 
@Stateless(name="SimpleBean")
public class SimpleBeanBean implements SimpleBeanLocal {
 
web.xml; -- note I use a whacko ejb-ref-name just to make it obvious where I'm using it.
 
 <ejb-local-ref>
 <ejb-ref-name>ejb_mapping_doodad/SimpleBean</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <local>sab.otn681398.ejb.SimpleBeanLocal</local>
 </ejb-local-ref> 
servlet:
 
package sab.otn681398.web;
import java.io.IOException;
import java.io.PrintWriter;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.*;
import javax.servlet.http.*;
import sab.otn681398.ejb.SimpleBeanLocal;
public class TestServlet extends HttpServlet {
 private static final String CONTENT_TYPE = "text/html; charset=windows-1252";
 private static final String SIMPLE_BEAN_JNDI = "ejb_mapping_doodad/ASimpleBean";
 private final boolean USEENC = true;
 private SimpleBeanLocal simple = null;
 public void init(ServletConfig config) throws ServletException {
 super.init(config);
 public void doGet(HttpServletRequest request,
 HttpServletResponse response) throws ServletException, IOException {
 response.setContentType(CONTENT_TYPE);
 PrintWriter out = response.getWriter();
 try {
 if(simple==null) {
 simple = createSimple();
 } catch(NamingException ne) {
 throw new ServletException("Error in looking up the EJB", ne);
 out.println("<html>");
 out.println("<head><title>TestServlet</title></head>");
 out.println("<body>");
 out.printf("The %s bean has been hit: %s times", simple, simple.getHitCount());
 out.println("</body></html>");
 out.close();
 private SimpleBeanLocal createSimple() throws NamingException {
 return (USEENC==true? createSimpleViaENC(): createSimpleViaName());
 private SimpleBeanLocal createSimpleViaENC() throws NamingException {
 InitialContext ic = new InitialContext();
 SimpleBeanLocal simple = (SimpleBeanLocal)ic.lookup("java:comp/env/" + SIMPLE_BEAN_JNDI);
 return simple;
 private SimpleBeanLocal createSimpleViaName() throws NamingException {
 InitialContext ic = new InitialContext();
 SimpleBeanLocal simple = (SimpleBeanLocal)ic.lookup(SIMPLE_BEAN_JNDI);
 return simple;
} 
-steve-

Can't access ejb with more than 1 person at the same time?

I am using the ejb to access the database using DBConnection Pool that I find in book. The code is as follow:
The problem is when more than one user access almost at the same time, the one who enter frst can access, but the other one can't and return context lookup error in creating EJB.
What's the problem of it, is it the ejb concurrent access problem or database concurrent access problem?
package login.database;
import java.io.*;
import java.sql.*;
import java.util.*;
import java.util.Date;
public class DBConnectionManager {
static private DBConnectionManager instance;
static private int clients;
private Vector drivers = new Vector();
private PrintWriter log;
private Hashtable pools = new Hashtable();
static synchronized public DBConnectionManager getInstance() {
if (instance == null) {
instance = new DBConnectionManager();
clients++;
return instance;
private DBConnectionManager() {
init();
public void freeConnection(String name, Connection con) {
DBConnectionPool pool = (DBConnectionPool) pools.get(name);
if (pool != null){
pool.freeConnection(con);
public Connection getConnection(String name) {
DBConnectionPool pool = (DBConnectionPool) pools.get(name);
if (pool != null) {
return pool.getConnection();
return null;
public Connection getConnection(String name, long time) {
DBConnectionPool pool = (DBConnectionPool) pools.get(name);
if (pool != null) {
return pool.getConnection(time);
return null;
public synchronized void release() {
if (--clients != 0) {
return;
Enumeration allPools = pools.elements();
while (allPools.hasMoreElements()) {
DBConnectionPool pool = (DBConnectionPool) allPools.nextElement();
pool.release();
Enumeration allDrivers = drivers.elements();
while (allDrivers.hasMoreElements()) {
Driver driver = (Driver) allDrivers.nextElement();
try {
DriverManager.deregisterDriver(driver);
log("Deregistered JDBC driver " + driver.getClass().getName());
} catch (SQLException e) {
log(e, "Can't deregister JDBC driver: " + driver.getClass().getName());
private void createPools(Properties props) {
Enumeration propNames = props.propertyNames();
while (propNames.hasMoreElements()) {
String name = (String) propNames.nextElement();
if (name.endsWith(".url")) {
String poolName = name.substring(0, name.lastIndexOf("."));
String url = props.getProperty(poolName + ".url");
if (url == null) {
log("No URL specified for " + poolName);
continue;
String user = props.getProperty(poolName + ".user");
String password = props.getProperty(poolName + ".password");
String maxconn = props.getProperty(poolName + ".maxconn", "0");
int max;
try {
max = Integer.valueOf(maxconn).intValue();
} catch (NumberFormatException e) {
log("Invalid maxconn value " + maxconn + "for " + poolName);
max = 0;
DBConnectionPool pool = new DBConnectionPool(poolName, url, user, password, max);
pools.put(poolName, pool);
log("Initialized pool " + poolName);
private void init(){
InputStream is = getClass().getResourceAsStream("db.properties");
Properties dbProps = new Properties();
try {
dbProps.load(is);
} catch (Exception e) {
System.err.println("Can't read the properties file. " +
"Make sure db.properties is in the CLASSPATH");
return;
String logFile = dbProps.getProperty("logfile","DBConnectionManager.log");
try {
log = new PrintWriter(new FileWriter(logFile, true), true);
} catch (IOException e) {
System.err.println("Can't open the log file: " + logFile);
log = new PrintWriter(System.err);
loadDrivers(dbProps);
createPools(dbProps);
private void loadDrivers(Properties props) {
String driverClasses = props.getProperty("drivers");
StringTokenizer st = new StringTokenizer(driverClasses);
while (st.hasMoreElements()) {
String driverClassName = st.nextToken().trim();
try {
Driver driver = (Driver) Class.forName(driverClassName).newInstance();
DriverManager.registerDriver(driver);
drivers.addElement(driver);
log("Registered JDBC driver " + driverClassName);
} catch (Exception e) {
log("Can't register JDBC driver: " + driverClassName + ", Exception: " + e);
private void log(String msg) {
log.println(new Date() + ": " + msg);
private void log(Throwable e, String msg) {
log.println(new Date() + ": " + msg);
e.printStackTrace(log);
class DBConnectionPool {
private int checkedOut;
private Vector freeConnections = new Vector();
private int maxConn;
private String name;
private String password;
private String URL;
private String user;
public DBConnectionPool(String name, String URL, String user, String password, int maxConn) {
this.name = name;
this.URL = URL;
this.user = user;
this.password = password;
this.maxConn = maxConn;
public synchronized void freeConnection(Connection con) {
freeConnections.addElement(con);
checkedOut--;
notifyAll();
public synchronized Connection getConnection() {
Connection con = null;
if (freeConnections.size() > 0) {
con = (Connection) freeConnections.firstElement();
freeConnections.removeElementAt(0);
try {
if (con.isClosed()) {
log("Removed bad connection from " + name);
con = getConnection();
} catch (SQLException e) {
log("Removed bad connection from " + name);
con = getConnection();
else if (maxConn == 0 || checkedOut < maxConn) {
con = newConnection();
if (con != null) {
checkedOut++;
return con;
public synchronized Connection getConnection(long timeout) {
long startTime = new Date().getTime();
Connection con;
while ((con = getConnection()) == null) {
try {
wait(timeout);
} catch (InterruptedException e) {}
if ((new Date().getTime() - startTime) >= timeout) {
return null;
return con;
public synchronized void release() {
Enumeration allConnections = freeConnections.elements();
while (allConnections.hasMoreElements()) {
Connection con = (Connection) allConnections.nextElement();
try {
con.close();
log("Closed connection for pool " + name);
} catch (SQLException e) {
log(e, "Can't close connection for pool " + name);
freeConnections.removeAllElements();
private Connection newConnection() {
Connection con = null;
try {
if (user == null) {
con = DriverManager.getConnection(URL);
else {
con = DriverManager.getConnection(URL, user, password);
log("Created a new connection in pool " + name);
} catch (SQLException e) {
log(e, "Can't create a new connection for " + URL);
return null;
return con;

Hi,
static synchronized public DBConnectionManager getInstance() {
The word "synchronized" will allow only one user at a time to access the getInstance() method which returns DBConnectionManager. Suggest u read some stuff on the same
As I am not sure which App server ur using, u cld do the following
1. Create a Conection Pool in ur App Server itself (Weblogic/Websphere/Jboss way)
2. Create a DataSource which maps to this Connection Pool.
3. Use the DataSource object which handles poolong of Connections to access the database
4. As mentioned above, Read notes/documents on "Synchronized" and "Vector" before you use this word in any code of EJB. This will solve ur problem. Read topic called "Collection Framework".
Seetesh

Unable to access secondary subnet from VPN client

Please can someone help with the following; I have an ASA 5510 running v8.4(3)9 and have setup a remote user VPN using the Cisco VPN client v5.0.07.0410 which is working appart from the fact that I cannot access resources on a secondary subnet.
The setup is as follows:
ASA inside interface on 192.168.10.240
VPN clients on 192.168.254.x
I can access reources on the 192.168.10 subnet but not any other subnets internally, I need to specifically allow access to the 192.168.20 subnet, but I cannot figure out how to do this please advise, the config is below: -
Result of the command: "show startup-config"
ASA Version 8.4(3)9
hostname blank
domain-name
enable password encrypted
passwd encrypted
names
dns-guard
interface Ethernet0/0
nameif outside
security-level 0
ip address 255.255.255.224
interface Ethernet0/1
nameif inside
security-level 100
ip address 192.168.10.240 255.255.255.0
interface Ethernet0/2
nameif DMZ
security-level 50
ip address 10.10.10.253 255.255.255.0
interface Ethernet0/3
shutdown
no nameif
no security-level
no ip address
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
management-only
boot system disk0:/asa843-9-k8.bin
boot system disk0:/asa823-k8.bin
ftp mode passive
clock timezone GMT/BST 0
clock summer-time GMT/BDT recurring last Sun Mar 1:00 last Sun Oct 2:00
dns domain-lookup outside
dns domain-lookup inside
dns server-group DefaultDNS
name-server 194.168.4.123
name-server 194.168.8.123
domain-name nifcoeu.com
object network obj-192.168.0.0
subnet 192.168.0.0 255.255.255.0
object network obj-192.168.5.0
subnet 192.168.5.0 255.255.255.0
object network obj-192.168.10.0
subnet 192.168.10.0 255.255.255.0
object network obj-192.168.100.0
subnet 192.168.100.0 255.255.255.0
object network obj-192.168.254.0
subnet 192.168.254.0 255.255.255.0
object network obj-192.168.20.1
host 192.168.20.1
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network obj_any-01
subnet 0.0.0.0 0.0.0.0
object network obj-0.0.0.0
host 0.0.0.0
object network obj_any-02
subnet 0.0.0.0 0.0.0.0
object network obj-10.10.10.1
host 10.10.10.1
object network obj_any-03
subnet 0.0.0.0 0.0.0.0
object network obj_any-04
subnet 0.0.0.0 0.0.0.0
object network obj_any-05
subnet 0.0.0.0 0.0.0.0
object network NS1000_EXT
host 80.4.146.133
object network NS1000_INT
host 192.168.20.1
object network SIP_REGISTRAR
host 83.245.6.81
object service SIP_INIT_TCP
service tcp destination eq sip
object service SIP_INIT_UDP
service udp destination eq sip
object network NS1000_DSP
host 192.168.20.2
object network SIP_VOICE_CHANNEL
host 83.245.6.82
object service DSP_UDP
service udp destination range 6000 40000
object service DSP_TCP
service tcp destination range 6000 40000
object network 20_range_subnet
subnet 192.168.20.0 255.255.255.0
description Voice subnet
object network 25_range_Subnet
subnet 192.168.25.0 255.255.255.0
description VLAN 25 client PC devices
object-group network ISP_NAT
object-group protocol TCPUDP
protocol-object udp
protocol-object tcp
object-group service SIP_INIT tcp-udp
port-object eq sip
object-group service DSP_TCP_UDP tcp-udp
port-object range 6000 40000
access-list inside_nat0_outbound extended permit ip 192.168.10.0 255.255.255.0 192.168.254.0 255.255.255.0
access-list inside_nat0_outbound extended permit ip object 20_range_subnet 192.168.254.0 255.255.255.0
access-list Remote-VPN_splitTunnelAcl standard permit 192.168.10.0 255.255.255.0
access-list Remote-VPN_splitTunnelAcl standard permit 192.168.20.0 255.255.255.0
access-list 100 extended permit object-group TCPUDP object SIP_REGISTRAR object NS1000_INT object-group SIP_INIT
access-list 100 extended permit object-group TCPUDP object SIP_VOICE_CHANNEL object NS1000_DSP object-group DSP_TCP_UDP
access-list 100 extended permit ip 62.255.171.0 255.255.255.224 any
access-list 100 extended permit icmp any any echo-reply inactive
access-list 100 extended permit icmp any any time-exceeded inactive
access-list 100 extended permit icmp any any unreachable inactive
access-list 100 extended permit tcp any host 10.10.10.1 eq ftp
access-list 100 extended permit tcp any host 10.10.10.1 eq ftp-data
pager lines 24
logging enable
logging asdm informational
mtu outside 1500
mtu inside 1500
mtu DMZ 1500
mtu management 1500
ip local pool VPN-Pool 192.168.254.1-192.168.254.254 mask 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-647.bin
asdm history enable
arp timeout 14400
nat (inside,any) source static obj-192.168.0.0 obj-192.168.0.0 destination static obj-192.168.5.0 obj-192.168.5.0 no-proxy-arp route-lookup
nat (inside,any) source static obj-192.168.10.0 obj-192.168.10.0 destination static obj-192.168.100.0 obj-192.168.100.0 no-proxy-arp route-lookup
nat (inside,any) source static obj-192.168.10.0 obj-192.168.10.0 destination static obj-192.168.254.0 obj-192.168.254.0 no-proxy-arp route-lookup
nat (outside,inside) source static SIP_REGISTRAR SIP_REGISTRAR destination static interface NS1000_INT service SIP_INIT_TCP SIP_INIT_TCP
nat (outside,inside) source static SIP_REGISTRAR SIP_REGISTRAR destination static interface NS1000_INT service SIP_INIT_UDP SIP_INIT_UDP
object network obj_any
nat (inside,outside) dynamic interface
object network obj_any-01
nat (inside,outside) dynamic obj-0.0.0.0
object network obj_any-02
nat (inside,DMZ) dynamic obj-0.0.0.0
object network obj-10.10.10.1
nat (DMZ,outside) static 80.4.146.134
object network obj_any-03
nat (DMZ,outside) dynamic obj-0.0.0.0
object network obj_any-04
nat (management,outside) dynamic obj-0.0.0.0
object network obj_any-05
nat (management,DMZ) dynamic obj-0.0.0.0
access-group 100 in interface outside
route outside 0.0.0.0 0.0.0.0 80.4.146.129 1
route inside 192.168.20.0 255.255.255.0 192.168.10.254 1
route inside 192.168.25.0 255.255.255.0 192.168.10.254 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
aaa authentication ssh console LOCAL
http server enable
http 192.168.1.0 255.255.255.0 management
http 192.168.10.0 255.255.255.0 inside
http 192.168.25.0 255.255.255.0 inside
http 62.255.171.0 255.255.255.224 outside
http 192.168.254.0 255.255.255.0 outside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec ikev1 transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set ikev1 transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map interface outside
crypto ca trustpoint ASDM_TrustPoint0
enrollment self
subject-name CN=
crl configure
crypto ca trustpoint _SmartCallHome_ServerCA
crl configure
crypto ca certificate chain ASDM_TrustPoint0
certificate 2f0e024d
quit
crypto ca certificate chain _SmartCallHome_ServerCA
certificate ca 6ecc7aa5a7032009b8cebcf4e952d491
quit
crypto isakmp identity address
crypto ikev1 enable outside
crypto ikev1 policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
telnet 192.168.1.0 255.255.255.0 management
telnet timeout 5
ssh 62.255.171.0 255.255.255.224 outside
ssh 192.168.254.0 255.255.255.0 outside
ssh 192.168.10.0 255.255.255.0 inside
ssh 192.168.25.0 255.255.255.0 inside
ssh timeout 5
ssh version 2
console timeout 0
vpn-sessiondb max-other-vpn-limit 250
vpn-sessiondb max-anyconnect-premium-or-essentials-limit 2
dhcpd address 192.168.1.2-192.168.1.254 management
dhcpd enable management
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 192.168.10.6 source inside prefer
webvpn
group-policy Remote-VPN internal
group-policy Remote-VPN attributes
wins-server value 192.168.10.21 192.168.10.22
dns-server value 192.168.10.21 192.168.10.22
vpn-tunnel-protocol ikev1
split-tunnel-policy tunnelspecified
split-tunnel-network-list value Remote-VPN_splitTunnelAcl
default-domain value
username blank password blank encrypted privilege 0
username blank attributes
vpn-group-policy Remote-VPN
username blank password encrypted privilege 0
username blank attributes
vpn-group-policy Remote-VPN
tunnel-group Remote-VPN type remote-access
tunnel-group Remote-VPN general-attributes
address-pool VPN-Pool
default-group-policy Remote-VPN
tunnel-group Remote-VPN ipsec-attributes
ikev1 pre-shared-key *****
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect netbios
inspect tftp
inspect ip-options
inspect sip
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
call-home
contact-email-addr
profile CiscoTAC-1
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email [email protected]
destination transport-method http
subscribe-to-alert-group diagnostic
subscribe-to-alert-group environment
subscribe-to-alert-group inventory periodic monthly
subscribe-to-alert-group configuration periodic monthly
subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:b8263c5aa7a6a4d9cb08368c042ea236

Your config was missing a no-nat between your "192.168.20.0" and "obj-192.168.254.0"
So, if you look at your config there is a no-nat for inside subnet "obj-192.168.10.0" as shown below.
nat (inside,any) source static obj-192.168.10.0 obj-192.168.10.0 destination static obj-192.168.254.0 obj-192.168.254.0
So all you have to do is create a no-nat for your second subnet, like I showed you before, the solution was already there on your config but I guess you over looked at it.
I hope that helps.
Thanks
Rizwan Rafeek

Problems in accessing EJB from stand-alone client

Hi,
I am trying to access a EJB deployed in RI from a stand-alone client. When I run it, I got this exception:
Exception in thread "main" java.rmi.AccessException: CORBA NO_PERMISSION 9998 Ma
ybe; nested exception is:
org.omg.CORBA.NO_PERMISSION: minor code: 9998 completed: Maybe
org.omg.CORBA.NO_PERMISSION: minor code: 9998 completed: Maybe
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Unknown Source)
at com.sun.corba.ee.internal.iiop.messages.ReplyMessage_1_2.getSystemExc
eption(ReplyMessage_1_2.java:93)
at com.sun.corba.ee.internal.iiop.ClientResponseImpl.getSystemException(
ClientResponseImpl.java:108)
at com.sun.corba.ee.internal.POA.GenericPOAClientSC.invoke(GenericPOACli
entSC.java:136)
at org.omg.CORBA.portable.ObjectImpl._invoke(Unknown Source)
at TheBeanRemoteStub.test(Unknown Source)
at Client.main(Client.java:19)
The following is the code of the client:
System.setProperty(Context.SECURITY_PRINCIPAL, "achong");
System.setProperty(Context.SECURITY_CREDENTIALS, "achong");
Context context = new InitialContext(System.getProperties());
Object object = PortableRemoteObject.narrow(context.lookup("MyBean"), TheBeanHome.class);
TheBeanHome home = (TheBeanHome) object;
I have set "support client choice" while deploying the bean, and set which roles can access which methods. Any idea? Is my code is incorrect?

I have the same problem like you.
If you solve it, please give me a hint.
Thank you very much!
[email protected]

HT5577 Devices and Recovery ID stolen. Unable to access account with two-step verification. Apple does not care. What can I do?

Last year, my backpack containing my laptop and phone were stolen. My Recovery Key was saved as a screenshot on the laptop and on the phone and I have no other copy. I remotely wiped both devices. I had no insurance for such circumstances and replaced them at my own expense but I cannot access my AppleID account because Two-Step Verification is active and my old telephone number was replaced and I no longer have access to it. I can live with losing the devices as a result of my own stupidity, but Apple claims they are unable to restore my access to my old account in spite of the special circumstances. Apple can confirm my identity via my bank details and my email address but they do not seem to care. I've lost access to my music, software, calendars etc. I have a new AppleID - I had no other option but to set one up - but it irks me that Apple is unwilling to transfer purchases made on my old AppleID to my new one. I am considering taking legal action to regain my purchases and wonder if anybody else has found themselves in a similar situation.

If apple tracked deviced they sold they would be violating a great number of privicy laws and would face class action and criminal lawsuits in most of the western countries

Unable to access folders with RV082 QuickVPN

I have an office peer-to-peer network (win 7) connected with a QNAP NAS and a RV082 router. There is no proper naming (I don't know how to implement it) so everything is access via IP.
I managed to configure my RV082 to accept VPN connection from home via QuickVPN with cert etc and managed to ping all the running devices in the office, i.e. printers, nas, etc after connected with the office network.
However, when I try to browse the NAS say run "\\192.168.1.5\", it says "The network path was not found". But I could ping the IP just fine but not the name, I'm not sure if adding it into my lmhost will help.
I'm wondering if any of these has anything to do with my VPN settings? or is it my horrible network setup that is giving me the trouble. I also noticed that if i'm not on the same workgroup, when I try to browse office workgroup from Explorer/ Entire Network it will say "workgroup not accessible. You might not have permission to use this network resource..................."
Is this more of a Windows than my VPN issue? do I need other protocols besides TCP/IP such as NWlink netbios. I only have client for microsoft network, file sharing and tcp/ip running.

Hi Yee,
Thank you for posting. Are you able to access shares on \\192.168.1.5 locally? If you can access the shares when you are onsite you should be able to access them using QuickVPN as well. You are correct that if you add the hostnames to the LMHosts file you will be able to access by name.
This sounds like an issue with the NAS itself. You can check this by trying to access a shared folder on a PC. You may need to disable any antivirus or firewall software on that PC before you can access shared folders.
Please keep us updated.

Puzzler... Cant access RRAS with VPN connected client

I have a series of 4 VMs running server 2012 r2;
dc- my domain and wsus server
rds- my remote desktop server for remoteapps, RRAS for connecting to VPN
sql- sql server for database needed for one of the apps published
av- hosts kaspersky and manages backups
So, I have a VPN set up through RRAS and am connecting with it and all is well. I can ping every computer on the network EXCEPT the rds server. I can ping from the rds server to the vpn client.
I am trying to use a remote app over the vpn but the remote app is unable to reach the rds server.
Does something have to be setup manually to loopback traffic to the rds server when it is coming in on the same server through RRAS?
Any insight would be appreciated!
Matt

Hi,
According to your description, my understanding is that rds installed RRAS and configured it as VPN server, VPN client successfully ping internal clients, but failed to ping the VPN server.
Are there 2 NICs on the VPN server? One connects to internal and another connects to external?
In general, a ping packet is sent by the client from its own IP address to the external IP address of VPN server, it will be unpacked once the VPN server receives it, and the VPN server will dispatch this pack due to the internal IP address. So, if this
packet is sent to the VPN server, when it unpack the packet and find it is sent to itself, the VPN server should reply to this packet.
You may try to turn off firewall/anti-virus software temporally, and then check to see if it can successfully ping. Besides, use a monitoring tool(Network Monitor, Wireshark ) to
capture packets on both client and VPN server, check to see if the packets are sent/answered to the correctly destination.
Best Regards,
Eve Wang
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

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