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/SocketContainer;+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/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+195

(AuthoritiesServlet.java:38)

javax/servlet/http/HttpServlet.service(Ljavax/servlet/http/HttpServletRequest;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/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+81

(ServletManager.java:1305)

com/ibm/servlet/service/SEServletManager.callServletService(Ljava/lang/String;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+12

 (SEServletManager.java:84)

com/sun/server/http/InvokerServlet.service(Ljavax/servlet/http/HttpServletRequest;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/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+81

(ServletManager.java:1305)

com/ibm/servlet/service/SEServletManager.callServletService(Ljava/lang/String;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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