On 20/12/2011 11:46, S B wrote:
> Code Sample that fails with exception(I am invoking reload() from jconsole
> ):
>
> class MBeanImpl implements MBeanInterface{
>
> public MBeanImpl{
> // code to register this bean.
> }
>
>
> @Override
> public void reload() {
>
> DBManager.loadFromDB();
>
> }
> }
>
>
> class DBManager{
>
> public static void loadFromDB(){
>
> InitialContext initContext = new
> InitialContext(); // here it fails with exception
> avax.naming.NoInitialContextException: Cannot instantiate class:
> org.apache.naming.java.javaURLContextFactory [Root
>
> // exception is java.lang.ClassNotFoundException:
> org.apache.naming.java.javaURLContextFactory]
> Context context = (Context)
> initContext.lookup("java:comp/env");
> logger.info("context found " + context);
> BasicDataSource ds = (BasicDataSource)
> context.lookup("jdbc/" + dataSourceName);
> ...............
> ...............
> }
>
> }
>
>
> ---------------------------------------------
>
> Code Sample that works:
>
> class MBeanImpl implements MBeanInterface{
> private Context envContext = null;
>
> public MBeanImpl{
> InitialContext initialContext = new InitialContext();
> envContext = (Context) initialContext.lookup("java:/comp/env");
> // code to register this bean.
> }
>
>
> @Override
> public void reload() {
>
> DBManager.loadFromDB(envContext); // passed context object
> obtained in constructor
>
> }
> }
>
>
> class DBManager{
>
> public static void loadFromDB(Context context){
>
> BasicDataSource ds = (BasicDataSource)
> context.lookup("jdbc/" + dataSourceName); // works fine as I am not
> creating new InitialContext here.
> ...............
> ...............
> }
>
> }Where does the MBeanImpl code run? In a ServletContextListener, or somewhere else? p > On Tue, Dec 20, 2011 at 4:59 PM, S B <sbl...@gmail.com> wrote: > >> Hi, >> I am using : >> >> Server version: Apache Tomcat/6.0.32 >> OS Name: Mac OS X >> OS Version: 10.6.8 >> Architecture: x86_64 >> JVM Version: 1.6.0_29-b11-402-10M3527 >> >> Thanks, >> Ravi >> >> >> On Tue, Dec 20, 2011 at 4:52 PM, Pid * <p...@pidster.com> wrote: >> >>> On 20 Dec 2011, at 11:02, S B <sbl...@gmail.com> wrote: >>> >>>> Hi, >>>> >>>> I created and deployed an MBean in my tomcat. It uses datasource to >>> connect >>>> to DB. >>> >>> Which version of Java? Tomcat? >>> >>> >>>> My questions is: >>>> >>>> When I create InitialContext() inside MBean's constructor and pass the >>>> envContext to DBManager class to lookup datasource it works fine. >>> However >>>> when I create InitialContext() in DBManager class, it fails. >>>> >>>> Is it necessary to create InitialContext() during loading of MBean >>> (either >>>> in ContextListener class or inside MBean constructor). >>> >>> It depends on where you run the code. You haven't told us this. >>> >>> Can you post a code example. >>> >>> >>> p >>> >>> >>>> When I did new InitialContext() in my DBManager class which is called >>> from >>>> hello method of MBean it failed with below exception: >>>> >>>> avax.naming.NoInitialContextException: Cannot instantiate class: >>>> org.apache.naming.java.javaURLContextFactory [Root exception is >>>> java.lang.ClassNotFoundException: >>>> org.apache.naming.java.javaURLContextFactory] >>>> >>>> I invoked hello method of MBean from JConsole. >>>> >>>> >>>> Please let me know is it Tomcat specific? or same behavior is seen >>> across >>>> all app servers. Also, What difference does it make if I create >>>> InitialContext inside MBean's constructor or in some other class at a >>> later >>>> point of time. >>>> >>>> Thanks >>>> Ravi >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >>> For additional commands, e-mail: users-h...@tomcat.apache.org >>> >>> >> > -- [key:62590808]
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