out of ideas on an error
I am attempting to set up a servlet which acts as and rmi client. I am getting an error which I don't understand. Are their additional securitys I have to set or something?? Here's the error Internal Servlet Error:java.lang.NullPointerException at java.lang.ClassLoader.resolveClass0(Native Method) at java.lang.ClassLoader.resolveClass(ClassLoader.java:588) at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.java:518) at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174) at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265) at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289) at org.apache.tomcat.core.Handler.service(Handler.java:254) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484)
perplexing multiple servlet output question..
I wanted a web page to display the results of mutiple servlets (maybe even as many as30 servlets) in rows on a web page. At first I was going to try to do it with frames where each frame would load a servlet. I then ran into a problem. I forgot that frames bind to a window and that you can't scroll through a single pagecontaining multiple frames (at least not that I know of). Anybodyhave any opinion on how they might try to do this? Example of a single Web page... ++ + servlet 1+ ++ + servlet 2+ ++ + servlet 3 + ++ + ect...+ ++ The user would then scroll through the page containing mutiple servlet output. Thanks, Kevin
perplexing multiple servlet output question..
I wanted a web page to display the results of mutiple servlets (maybe even as many as30 servlets) in rows on a web page. At first I was going to try to do it with frames where each frame would load a servlet. I then ran into a problem. I forgot that frames bind to a window and that you can't scroll through a single pagecontaining multiple frames (at least not that I know of). Anybodyhave any opinion on how they might try to do this? Example of a single Web page... ++ + servlet 1+ ++ + servlet 2+ ++ + servlet 3 + ++ + ect...+ ++ The user would then scroll through the page containing mutiple servlet output. Thanks, Kevin
Re: perplexing multiple servlet output question..
Yep, I tried that to. Frameset tags don't seem to have scrolling property. - Original Message - From: Jan Labanowski [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: Jan Labanowski [EMAIL PROTECTED] Sent: Tuesday, May 15, 2001 7:53 PM Subject: Re: perplexing multiple servlet output question.. Try to see if putting a frameset into a frame will help Jan On Tue, 15 May 2001, Kevin Fonner wrote: I wanted a web page to display the results of mutiple servlets (maybe even as many as 30 servlets) in rows on a web page. At first I was going to try to do it with frames where each frame would load a servlet. I then ran into a problem. I forgot that frames bind to a window and that you can't scroll through a single page containing multiple frames (at least not that I know of). Anybody have any opinion on how they might try to do this? Example of a single Web page... ++ + servlet 1 + ++ + servlet 2 + ++ + servlet 3 + ++ +ect...+ ++ The user would then scroll through the page containing mutiple servlet output. Thanks, Kevin Jan K. Labanowski|phone: 614-292-9279, FAX: 614-292-7168 Ohio Supercomputer Center|Internet: [EMAIL PROTECTED] 1224 Kinnear Rd, |http://www.ccl.net/'NA'istry.html Columbus, OH 43212-1163 |http://www.osc.edu/
Re: perplexing multiple servlet output question..
include()?? Could you please elaborate a little more? I am unfamiliar with that. Thanks, Kevin - Original Message - From: John Clark L. Naldoza [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, May 15, 2001 9:11 PM Subject: Re: perplexing multiple servlet output question.. Kevin Fonner wrote: I wanted a web page to display the results of mutiple servlets (maybe even as many as 30 servlets) in rows on a web page. At first I was going to try to do it with frames where each frame would load a servlet. I then ran into a problem. I forgot that frames bind to a window and that you can't scroll through a single page containing multiple frames (at least not that I know of). Anybody have any opinion on how they might try to do this? Example of a single Web page... ++ + servlet 1 + ++ + servlet 2 + ++ + servlet 3 + ++ +ect...+ ++ The user would then scroll through the page containing mutiple servlet output. Thanks, Kevin Why not try to use the include() directive? And use table rows to display the results...;-) Cheers, John Clark -- /) John Clark Naldoza y Lopez (\ / )Software Design Engineer II ( \ _( (__ Web-Application Development_) )_ (((\ \ /_Cable Modem Network Management System _\ / /))) ( \_/ / NEC Telecom Software Phils., Inc. \ \_/ ) \ / \ / \_/ phone: (+63 32) 233-9142 loc. 3112\_/ / / cellphone: (+63 919) 399-4742 \ \ / / email: [EMAIL PROTECTED]\ \
resultset Question
I want to grab just the first record in a Query of
my database. I thought that this would be pretty simple???
Acording to my books they said that after
executing...
resultSet = statement.executeQuery("SELECT *
FROM userfolders WHERE username=\'" + userName + "\'");
That resultset would contain the first
record. But I can't seem to grab the data. Below is a sample of my code
that I think pertains to my problem. If anybody has any ideas I would
appreciate them
resultSet = statement.executeQuery("SELECT * FROM
userfolders WHERE username=\'" + userName + "\'");dFolder
= resultSet.getString("folder");dModule =
resultSet.getString("dmod");dModulePath =
resultSet.getString("dmod_path");
Thanks,
Kevin
Re: resultset Question
Duck,
My apoligies. I have been spending the last
couple weeks learning tomcat and servlet type stuff and have been asking about
any confusing things I come across with this on this list. Even though I'm
working on a servlet I suppose that question could have been better directed at
a java database kind of list.
Thanks for the tip,
Kevin
- Original Message -
From:
Duck-Jin
Chun
To: '[EMAIL PROTECTED]'
Sent: Monday, May 14, 2001 5:54 PM
Subject: RE: resultset Question
Kevin,
There are 2 problems with your message. First,
this question is extremely off topic for this mailing list. Second, you
do not say what kind of errors and/or results you get by executing your
current code. You simply say you "can't seem to grab the data".
Not very helpful.
But
since I hate it when people just scream "off topic"... Take a look at the api
documentation for java.sql.ResultSet.next().
The next() method needs to be called
before you start calling the get*()
methods.
-Duck
-Original Message-----From: Kevin Fonner
[mailto:[EMAIL PROTECTED]]Sent: Monday, May 14, 2001 5:16
PMTo: [EMAIL PROTECTED]Subject: resultset
Question
I want to grab just the first record in a Query
of my database. I thought that this would be pretty
simple???
Acording to my books they said that after
executing...
resultSet = statement.executeQuery("SELECT
* FROM userfolders WHERE username=\'" + userName + "\'");
That resultset would contain the first
record. But I can't seem to grab the data. Below is a sample of my
code that I think pertains to my problem. If anybody has any ideas I
would appreciate them
resultSet = statement.executeQuery("SELECT *
FROM userfolders WHERE username=\'" + userName +
"\'");dFolder =
resultSet.getString("folder");dModule =
resultSet.getString("dmod");dModulePath =
resultSet.getString("dmod_path");
Thanks,
Kevin
java database
Do any good 100% pure java databases exist? Open Source java databases?
Re: java database
Everyone thanks for the tips. InstDM looks pretty good. Under their license agreement it says... The InstantDB binary releases are free for evaluation and development. Until InstantDB is Open Sourced please contact Lutris Technologies for full license details. Has anybody heard anything on if or when it is going to become open source? - Original Message - From: Tim O'Neil [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, May 10, 2001 5:38 PM Subject: Re: java database At 05:09 AM 5/11/2001 +0800, Noel E. Lecaros wrote: InstantDB. For more info, look at www.enhydra.org. InstDB is pretty cool, I played around with it before the developer joined up with enhydra. If I remember correctly its one (large, but not too large) jar, you just drop it in your classpath and you're good to go with sql-style persistence.
Re: use index.class instead of index.html?
Thanks, for you help but I couldn't seem to get
that to work. In case anybody is wondering I managed to accomplish this my
putting somthing in my web apps web.xml
servlet-mappingservlet-nameHelloWorld
/servlet-nameurl-pattern*.html/url-pattern/servlet-mapping
This intercepts the index.html file. I don't
think I will need to have any static files in my app but if I did I could use
.htm on them.
I'm just an amature at this so I probably shouldn't
be giving out advice. If anyone knows a better way(or the "proper" way)
please don't hesitate to let me know.
Thanks,
Kevin
- Original Message -
From:
Michael Zolotarev
To: Kevin Fonner
Cc: Xme (E-mail)
Sent: Wednesday, May 09, 2001 2:47
AM
Subject: RE: use index.class instead of
index.html?
I'm
a bit confused myself now, but I'll try to explain what I think the Tomcat's
logic is.
In
Server.xml you must've defined your Home directory, and a number of
contexts.
Tomcat processes all specified contexts and adds them to its
list.
Tomcat looks under your home directory, and add all
subdirectories and all files to the "automatic context load" list. If you
start tomcat from the console window, you'll see it reports about it. First go
the contexts you've specified explicitely, and then "automatic" contexts -
whatever Tomcat found in your home folder.
When
you type http://localhost:8080, Tomcat
searches all automatic(!) contexts. It looks for any of the files defined in
the welcome-file-list.
Whichever the first, the file is returned to the
browser.
Consequently, if you want to define your .class to be executed by
default, you must modify the welcome-file-list, and make sure that the
.class can be found in one of the "automatic" contexts.
I
guess you need to make sure that yourWeb-infbecomes one of the
automatic contexts, by placing it under your home.
Hope
it helps. Would like you to let me know if I was right in my
assumptions.
M
-Original Message-From: Kevin Fonner
[mailto:[EMAIL PROTECTED]]Sent: Wednesday, 9 May 2001
13:52To: Michael ZolotarevSubject: Re: use index.class
instead of index.html?
I've looked at the welcome file list element
and it seems to work for jsp's and html files but not servlets. I
thought servlets had to go in the /web-inf/classes directory? I tried
it anyways and put the class file in root and made the adjustment in the
/conf/web.xml it didn't seem to work.
Thanks,
Kevin
- Original Message -
From:
Michael Zolotarev
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Tuesday, May 08, 2001 11:19
PM
Subject: RE: use index.class instead
of index.html?
have a look at /conf/web.xml. Check our welcome-file-list
element.
-Original Message-From: Kevin Fonner
[mailto:[EMAIL PROTECTED]]Sent: Wednesday, 9 May 2001
13:14To: [EMAIL PROTECTED]Subject:
Re: use index.class instead of index.html?
just the tomcat server.
- Original Message -
From:
Michael Zolotarev
To: [EMAIL PROTECTED]
Sent: Tuesday, May 08, 2001 11:10
PM
Subject: RE: use index.class
instead of index.html?
Which server?
-Original Message-From: Kevin Fonner
[mailto:[EMAIL PROTECTED]]Sent: Wednesday, 9 May 2001
13:12To: [EMAIL PROTECTED]Subject:
use index.class instead of index.html?
How do I get the web server to start
with a servlet instead of an html file?This footnote confirms that this email message has
been swept byMIMEsweeper for the presence of computer
viruses.-The
information contained in this message is confidential and is intended
for the addressee(s) only. If you have received this message in
error or there are any problems please notify the originator
immediately. The unauthorized use, disclosure, copying or
alteration of this message is strictly forbidden. Baltimore
Technologies plc will not be liable for direct, special, indirect
or consequential damages arising from alteration of the contents
of this message by a third party or as a result of any virus being
passed on.In addition, certain Marketing collateral may be
added from time to time to promote Baltimore Technologies
products, services, Global e-Security or appearance at trade shows
and conferences.This footnote confirms tha
another database question
I want to be able to pass the authentication from the web application to the database system. I know I can use the req.getRemoteUser( ) to grab the authenticated user. How can I grab the password. Or is their a better way to handle this?
multiple servlet to 1 html page? Is it possible.
Would it be possible for Servlet X to begin spitting out html data and then make various calls to other servlets (such as Servlet A, B, and C) so what you would actually end up with is a single web page compiled by more then 1 servlet. Thanks in advance.. Kevin
use index.class instead of index.html?
How do I get the web server to start with a servlet instead of an html file?
Re: use index.class instead of index.html?
just the tomcat server. - Original Message - From: Michael Zolotarev To: [EMAIL PROTECTED] Sent: Tuesday, May 08, 2001 11:10 PM Subject: RE: use index.class instead of index.html? Which server? -Original Message-From: Kevin Fonner [mailto:[EMAIL PROTECTED]]Sent: Wednesday, 9 May 2001 13:12To: [EMAIL PROTECTED]Subject: use index.class instead of index.html? How do I get the web server to start with a servlet instead of an html file?This footnote confirms that this email message has been swept byMIMEsweeper for the presence of computer viruses.-The information contained in this message is confidential and is intended for the addressee(s) only. If you have received this message in error or there are any problems please notify the originator immediately. The unauthorized use, disclosure, copying or alteration of this message is strictly forbidden. Baltimore Technologies plc will not be liable for direct, special, indirect or consequential damages arising from alteration of the contents of this message by a third party or as a result of any virus being passed on.In addition, certain Marketing collateral may be added from time to time to promote Baltimore Technologies products, services, Global e-Security or appearance at trade shows and conferences.This footnote confirms that this email message has been swept by Baltimore MIMEsweeper for Content Security threats, includingcomputer viruses.
Re: win32 apache support Log to pipe??
I agree, this list is for questions and answers. Anything outside of that is just wasted typing. That's my 2 cents. I apoligize for the extra key stokes. - Original Message - From: MacCormac Rinehart [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, May 08, 2001 6:04 PM Subject: RE: win32 apache support Log to pipe?? I think the most annoying thing of all is poking fun as someone on a public forum when all they want is a little guidance. Everyone here has the beautify key on their keyboard called delete, don't get annoyed at someone who needs help. Just offer what you can or delete. And in case you haven't noticed, this list is billed as the support list for Tomcat, going to it when you have a problem and need help solving it seems reasonable to me, regardless of how much money you get paid. - Mac -Original Message- From: Tim O'Neil [mailto:[EMAIL PROTECTED]] Sent: Tuesday, May 08, 2001 2:49 PM To: [EMAIL PROTECTED] Subject: Re: win32 apache support Log to pipe?? At 04:33 PM 5/8/2001 -0500, you wrote: Personally I find it very annoying that you post the same message over and over again, throwing in a please help. It certainly does *not* make me want to help. It's even more of a problem for me when I think, rightly or wrongly, I dunno, that this person is probably being paid a salary or a consultant's fee of perhaps $200 a day or more to complete a task for his/her company and must resort to a mail list to complete that task. I think things like I'm glad I'm not involved and sorry for that company and stuff like that.
JDBCRealm
Of so I have been experimenting with this JDBCRealm stuff and can't seem to make it ask me for a user name and password. in the server.xml is.. RequestInterceptor className="org.apache.tomcat.request.JDBCRealm" debug="99"driverName="org.gjt.mm.mysql.Driver"connectionURL="jdbc:mysql://localhost/authority?user=authcheck;password=passcheck"userTable="Users" userNameCol="UserName" userCredCol="PassWord"userRoleTable="UserRoles" roleNameCol="RoleName" / in the examples web.xml is... security-constraint web-resource-collection web-resource-nameProtected Area/web-resource-name !-- Define the context-relative URL(s) to be protected -- url-pattern/examples/servlets/*/url-pattern !-- If you list http methods, only those methods are protected -- http-methodDELETE/http-method http-methodGET/http-method http-methodPOST/http-method http-methodPUT/http-method /web-resource-collection auth-constraint !-- Anyone with one of the listed roles may access this area -- role-nametomcat/role-name role-namerole1/role-name /auth-constraint /security-constraint !-- Default login configuration uses BASIC authentication --login-config auth-methodBASIC/auth-method realm-nameExample Basic Authentication Area/realm-name /login-config Shouldn't all this require the server to ask me for a password before I can use any of my servlets or am I missing something here?
JDBC Realm
So I have been experimenting with this JDBCRealm stuff and can't seem to make it ask me for a user name and password. in the server.xml is.. RequestInterceptor className="org.apache.tomcat.request.JDBCRealm" debug="99"driverName="org.gjt.mm.mysql.Driver"connectionURL="jdbc:mysql://localhost/authority?user=authcheck;password=passcheck"userTable="Users" userNameCol="UserName" userCredCol="PassWord"userRoleTable="UserRoles" roleNameCol="RoleName" / in the examples web.xml is... security-constraint web-resource-collection web-resource-nameProtected Area/web-resource-name !-- Define the context-relative URL(s) to be protected -- url-pattern/examples/servlets/*/url-pattern !-- If you list http methods, only those methods are protected -- http-methodDELETE/http-method http-methodGET/http-method http-methodPOST/http-method http-methodPUT/http-method /web-resource-collection auth-constraint !-- Anyone with one of the listed roles may access this area -- role-nametomcat/role-name role-namerole1/role-name /auth-constraint /security-constraint !-- Default login configuration uses BASIC authentication --login-config auth-methodBASIC/auth-method realm-nameExample Basic Authentication Area/realm-name /login-config Shouldn't all this require the server to ask me for a password before I can use any of my servlets or am I missing something here?
Re: single login form for single sign on
I am new to servlets and Tomcat and I was looking at how to authenticate
users with my webapps. Is this JDBCRealm the best way to do this or is
there a better way anybody suggest. If so where can I get info and samples
on this.
Thanks in advance,
Kevin
- Original Message -
From: Craig R. McClanahan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, May 01, 2001 1:36 AM
Subject: Re: single login form for single sign on
On Thu, 22 Mar 2001, Manish wrote:
Also can someone explain me when my authentication is successful using
JDBCRealm , how do I get the role information, cause only two attributes
are set for the session (username and password). Do I have to go back in
the roles table to get the role info or they are stored in someway in
the session.
This answer is late, but I'm assuming better late than never ...
If a user has been successfully authenticated, then you can access role
information in one of two ways:
* You can define a security constraint that requires a certain role
before the request URI will be processed for this user. If the user
tries to access a prohibited page, they will receive a 501 error
(forbidden).
* You can programmatically ask if the currently authenticated user
has a certain role by saying something like:
if (request.isUserInRole(manager)) {
... this user is a manager ...
}
The JDBCRealm implementation takes care of reading the required
information from the roles table in the database for you. There is
nothing your application needs to worry about for this.
TIA
--
Manish Poddar
Paycom.net
310-827-5880 x 327
818-415-7447 (m)
Craig McClanahan
multi user calander application
I want to create a multi user calander application. I searched through the archives and found no real goo info on using acl's or user authentication. Just wanted to know if anyone had any tips on how to handle this?
