Re: Accessing the Toolbox from a Servlet

That's interesting. I've never heard of a JVM optimization that loads all
classes. Do you know what level 10 and level 20 optimization does?

Brad Grier
grier@tconl.com

----- Original Message -----
From: <dawall@us.ibm.com>
To: <JAVA400-L@midrange.com>
Sent: Thursday, April 27, 2000 1:48 PM
Subject: Re: Accessing the Toolbox from a Servlet


> What JVM are you running?  If an AS/400, what release of OS/400 and at
what
> is the optimization level of jt400.jar?
>
> V4R2 and V4R3 AS/400s will throw a similar exception when jt400.jar is
> optimized at level 40.  At 40, the JVM loads all classes possibly used by
a
> class when a class is loaded.  It loads the classes even if they aren't
> used.  At 30, the dependent classes are not loaded until they are needed
> (when they are first referenced).  The Toolbox should be optimized at 30
on
> v4r2 and v4r3.  The Toolbox uses some browser specific classes when it
> detects it is running in a browser.  This works at 30 since the Toolbox
> does not go down the browser-specific leg of the code path when on the
> AS/400.  It doesn't work at 40 since the AS/400 loads up everything, even
> the browser-specific classes that aren't used.
>
> If you are not on the AS/400's JVM make sure your JVM is not running in
> 'verify' mode.  From a class loading point of view, verify mode is just
> like level 40.
>
> David Wall
> 553-5329
> AS/400 Toolbox for Java
>
>
> Nick_Vrtis@amway.com on 04/26/2000 11:41:37 AM
>
> Please respond to JAVA400-L@midrange.com
>
> To:   JAVA400-L@midrange.com
> cc:
> Subject:  Accessing the Toolbox from a Servlet
>
>
>
>
> I'm trying to create a Servlet which collects information from a number of
> AS/400's and returns it to an applet in a Web browser.  I started with a
> small servlet which just got the information from the applet, and just
> echoed it back.  This works OK.  Then I created another class that the
> Servlet calls.  Initially, all I am trying to do is log on to an AS/400
> with the Toolbox AS400 class.  I feed it the System name, User ID, and
> Password.  Then try to create an AS400Text object.  The whole thing
appears
> to terminate.... I create the AS400 class and the text object in a
> try/catch (Exception e) group.  The catch apparently doesn't handle the
> exception for some reason.
>
> I looked in the Error log from the Servet, and I see:
>
> com.ibm.servlet.service.SEInvokerException:
> ViewAuthorities.AuthoritiesServlet: com/ms/security/PolicyEngine
> java.lang.NoClassDefFoundError: com/ms/security/PolicyEngine
>
>
com/ibm/as400/access/Security400.connect(Z)Lcom/ibm/as400/access/SocketConta
iner;+4
>
> (Security400.java:693)
>       com/ibm/as400/access/Security400.startSignon(ZZZ)I+9
> (Security400.java:331)
>       com/ibm/as400/access/Security400.signon(ZZZ)I+382
> (Security400.java:315)
>
>
com/ibm/as400/access/SecurityManager400.signon(Ljava/lang/String;Ljava/lang/
String;Ljava/lang/String;ZZZ)Lcom/ibm/as400/access/Security400;+20
>
> (SecurityManager400.java:266)
>       com/ibm/as400/access/AS400.getSecurity400()V+126 (AS400.java:1266)
>       com/ibm/as400/access/AS400.signOn()V+41 (AS400.java:2077)
>
>
com/ibm/as400/access/AS400.connect(Ljava/lang/String;)Lcom/ibm/as400/access/
AS400Server;+52
>
> (AS400.java:517)
>       com/ibm/as400/access/NLSImplRemote.connect()V+12
> (NLSImplRemote.java:62)
>       com/ibm/as400/access/AS400.getCcsidFromServer()I+17 (AS400.java:999)
>       com/ibm/as400/access/AS400.getCcsid()I+13 (AS400.java:980)
>
> com/ibm/as400/access/AS400Text.<init>(IILcom/ibm/as400/access/AS400;)V+66
> (AS400Text.java:141)
>
>
ViewAuthorities/AuthoritiesConnection.login(Ljava/io/PrintWriter;Ljava/lang/
String;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Exception;+47
>
>  (AuthoritiesConnection.java:29)
>
>
ViewAuthorities/AuthoritiesServlet.doPost(Ljavax/servlet/http/HttpServletReq
uest;Ljavax/servlet/http/HttpServletResponse;)V+195
>
> (AuthoritiesServlet.java:38)
>
>
javax/servlet/http/HttpServlet.service(Ljavax/servlet/http/HttpServletReques
t;Ljavax/servlet/http/HttpServletResponse;)V+142
>
> (HttpServlet.java:521)
>
>
javax/servlet/http/HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/
servlet/ServletResponse;)V+25
>
> (HttpServlet.java:588)
>
>
com/sun/server/ServletState.callService(Ljavax/servlet/ServletRequest;Ljavax
/servlet/ServletResponse;)V+50
>
> (ServletState.java:313)
>
>
com/sun/server/ServletManager.callServletService(Ljava/lang/String;Ljavax/se
rvlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+81
>
> (ServletManager.java:1305)
>
>
com/ibm/servlet/service/SEServletManager.callServletService(Ljava/lang/Strin
g;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+12
>
>  (SEServletManager.java:84)
>
>
com/sun/server/http/InvokerServlet.service(Ljavax/servlet/http/HttpServletRe
quest;Ljavax/servlet/http/HttpServletResponse;)V+131
>
> (InvokerServlet.java:104)
>
>
javax/servlet/http/HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/
servlet/ServletResponse;)V+25
>
> (HttpServlet.java:588)
>
>
com/sun/server/ServletState.callService(Ljavax/servlet/ServletRequest;Ljavax
/servlet/ServletResponse;)V+50
>
> (ServletState.java:313)
>
>
com/sun/server/ServletManager.callServletService(Ljava/lang/String;Ljavax/se
rvlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+81
>
> (ServletManager.java:1305)
>
>
com/ibm/servlet/service/SEServletManager.callServletService(Ljava/lang/Strin
g;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+12
>
>  (SEServletManager.java[April 26, 2000 12:24:49 PM GMT+00:00] Exception
> raised in servlet invoker.
> [April 26, 2000 12:24:49 PM GMT+00:00]
> com.ibm.servlet.service.SEInvokerException:
> ViewAuthorities.AuthoritiesServlet: com/ms/security/PolicyEngine
>
> Does anybody have any ideas what is happening?  Is there some other place
I
> can look for more information?
>
> Thanks.  Nick
>
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