public  void create() throws Exception 
{
      super.start();
      BeanMetaData md = getContainer().getBeanMetaData();
      ejbName = md.getEjbName();
      // Should we log call details
      callLogging = md.getContainerConfiguration().getCallLogging();
}

 public Object invoke(Invocation invocation) throws Exception 
{
      String methodName;
      if (invocation.getMethod() != null)
      {
         methodName = invocation.getMethod().getName();
      }
      else
      {
         methodName = "< no method >";
      }
      boolean trace = log.isTraceEnabled();
      if (trace)
      {
         log.trace("Start method=" + methodName);
      }
      // Log call details
      if (callLogging)
      {
         StringBuffer str = new StringBuffer("Invoke: ");
         if (invocation.getId() != null)
         {
            str.append("[");
            str.append(invocation.getId().toString());
            str.append("] ");
         }
         str.append(methodName);
         str.append("(");
         Object[] args = invocation.getArguments();
         if (args != null)
         {
            for (int i = 0; i <  args.length; i++)
            {
               if (i  > 0)
               {
                  str.append(",");
               }
               str.append(args[i]);
            }
         }
         str.append(")");
         log.debug(str.toString());
      }
      try
      {
         return getNext().invoke(invocation);
      }
      catch(Throwable e)
      {
         throw handleException(e, invocation);
      }
      finally
      {
         if (trace)
         {
            log.trace("End method=" + methodName);
         }
      }
}

This method logs the method, calls the next invoker, and handles any exception.

 public Object invokeHome(Invocation invocation) throws Exception 
{
      String methodName;
      if (invocation.getMethod() != null)
      {
         methodName = invocation.getMethod().getName();
      }
      else
      {
         methodName = "< no method >";
      }
      boolean trace = log.isTraceEnabled();
      if (trace)
      {
         log.trace("Start method=" + methodName);
      }
      // Log call details
      if (callLogging)
      {
         StringBuffer str = new StringBuffer("InvokeHome: ");
         str.append(methodName);
         str.append("(");
         Object[] args = invocation.getArguments();
         if (args != null)
         {
            for (int i = 0; i <  args.length; i++)
            {
               if (i  > 0)
               {
                  str.append(",");
               }
               str.append(args[i]);
            }
         }
         str.append(")");
         log.debug(str.toString());
      }
      try
      {
         return getNext().invokeHome(invocation);
      }
      catch(Throwable e)
      {
         throw handleException(e, invocation);
      }
      finally
      {
         if (trace)
         {
            log.trace("End method=" + methodName);
         }
      }
}

This method logs the method, calls the next invoker, and handles any exception.