Re: [WebMacro] Re: [WebMacro-user] Help about using webmacro with J2ee

[Keats K. <kea...@na...>]

I'm no J2EE expert either but here is my understanding ...

First of all, the Servlet API is part of J2EE, in fact, as I understand
it, it is by far the most popular part of the J2EE.  Presumeably you are
talking about EJBs.

I don't think you'll have much luck calling WebMacro directly from an
EJB.  EJBs have lot's of restrictions that WebMacro violates -- dynamic
class loading, threads, etc.  WM must run outside of the EJB container
-- like inside of a Servlet container.  This is probably about your only
choice from an EJB, since I don't think you're allowed to open a socket
either.

However, you should be able to call EJBs from a WM application without
any problems.

I hope this helps.

Keats

Eric B.Ridge wrote:
 > Hi Jian!   Let me apologize up front.  The WebMacro project is in the
 > process of moving our mailing lists to SourceForge (should be complete
 > in the next few days), and you're the first to post to our new
 > SourceForge list.  Unfortunately, our j2ee experts are not on this list
 > yet.  I'm cc'ing our old list just to see if anyone has any ideas.
 > Hopefully, if they do, they'll make sure to include the new list in
 > their reponse.
 >
 > I know little about j2ee, so bear with me...
 >
 > What I do know about j2ee is that it is supposed to be secure and that
 > the security policies can be configured.  Is this true?
 >
 > Anyways, it looks to me as if the java.lang.ClassLoader class (or even
 > the java.lang.ClassLoader.getSystemClassLoader() method) is something
 > that cannot be accessed by regular code.  WebMacro does all sorts of
 > loading via the classloader.
 >
 > I'm wondering if you can expand your security policy to allow access to
 > (at least) java.lang.ClassLoader.getSystemClassLoader().  Perhaps even
 > all methods of the class.
 >
 > Does this help?  I hope it does
 >
 > eric
 >
 > On Wednesday, October 30, 2002, at 06:19  PM, Jian Liu wrote:
 >
 >> I am a student in UTD. I am trying to use webmacro with j2ee. i just
 >> added the webmacro.jar and webmacro.properties files into the WAR
 >> components. But when I run the servlet, it gave me such an error
 >> message:
 >>
 >> java.lang.ExceptionInInitializerError:
 >> java.security.AccessControlException: access denied
 >> (java.lang.RuntimePermission getClassLoader)
 >> at
 >> java.security.AccessControlContext.checkPermission(AccessControlContext
 >> .java:272)
 >> at
 >> java.security.AccessController.checkPermission(AccessController.java:39
 >> 9)
 >> at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
 >> at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:964)
 >> at org.webmacro.Broker.(Broker.java:58)
 >> at org.webmacro.WM.(WM.java:74)
 >> at MyServlet.init(MyServlet.java:33)
 >> at
 >> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:852)
 >> ......
 >>
 >> What does this mean?  I am using webmacro 1.0.1 and j2sdkee1.3.1,
 >> jdk1.3.1_01.
 >>
 >> Btw, i tested my servlet using apache+tomcat+webmacro, it worked.
 >>
 >>
 >> Thank you very much, with the best regrads.
 >>
 >> Jian Liu
 >
 >
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