Security Manager, Embedded and Class Loading

[Nick Betteridge <n....@syntactics.com>]

I've a problem that I don't really understand.

I'm in the process of getting the security manager to work with an
Embedded setup and the bootstrap is virtually the same as Catalina's.

If I create, for example, a (Standard)Server and (Standard)Service, I
get objects generated. If I attempt to create an engine, the classloader
(catalinaLoader) finds the (Standard)Engine class, but is unable to
create a newInstance.

ie ...



    /**
     * Create a new server instance.
     */
    public void serverCreate() {
        try {
            Class serverClass =
catalinaClassLoader.loadClass("org.apache.catalina.core.StandardServer");
            Object server = serverClass.newInstance();
        } catch (Exception ex) {
        }
    }

... will create a : org.apache.catalina.core.StandardServer@5d56d5


but a 



    public void engineCreate() {
        try {
            Class engineClass =
catalinaClassLoader.loadClass("org.apache.catalina.core.StandardEngine");
            Object engine = engineClass.newInstance();
        } catch (Exception ex) {
        }
    }


will give a : StandardEngine[null]


..... note that the full package name is missing and that engineClass is
found.


If anybody can shed any light on this, I'd be very grateful for comment

nick

Re: Security Manager, Embedded and Class Loading

["Craig R. McClanahan" <cr...@apache.org>]

This is actually pretty easy to understand.

When you do something like

  StandardEngine engine = ...;
  System.out.println("My engine is " + engine);

Java automatically calls engine.toString() for you.  Most (but not quite
all, obviously) of the core Catalina components override toString() to
print out something reasonable.  If you get

  StandardEngine[null]

that just means you have not called engine.getName() yet -- afterwards, it
will print whatever name you've assigned it inside the square brackets.

Craig


On Tue, 4 Sep 2001, Nick Betteridge wrote:

> Date: Tue, 04 Sep 2001 18:27:10 +0100
> From: Nick Betteridge <n....@syntactics.com>
> Reply-To: tomcat-dev@jakarta.apache.org
> To: tomcat-dev@jakarta.apache.org
> Subject: Security Manager, Embedded and Class Loading
>
> I've a problem that I don't really understand.
>
> I'm in the process of getting the security manager to work with an
> Embedded setup and the bootstrap is virtually the same as Catalina's.
>
> If I create, for example, a (Standard)Server and (Standard)Service, I
> get objects generated. If I attempt to create an engine, the classloader
> (catalinaLoader) finds the (Standard)Engine class, but is unable to
> create a newInstance.
>
> ie ...
>
>
>
>     /**
>      * Create a new server instance.
>      */
>     public void serverCreate() {
>         try {
>             Class serverClass =
> catalinaClassLoader.loadClass("org.apache.catalina.core.StandardServer");
>             Object server = serverClass.newInstance();
>         } catch (Exception ex) {
>         }
>     }
>
> ... will create a : org.apache.catalina.core.StandardServer@5d56d5
>
>
> but a
>
>
>
>     public void engineCreate() {
>         try {
>             Class engineClass =
> catalinaClassLoader.loadClass("org.apache.catalina.core.StandardEngine");
>             Object engine = engineClass.newInstance();
>         } catch (Exception ex) {
>         }
>     }
>
>
> will give a : StandardEngine[null]
>
>
> ..... note that the full package name is missing and that engineClass is
> found.
>
>
> If anybody can shed any light on this, I'd be very grateful for comment
>
> nick
>