Re: iterate on a value
If you don't mind mixing Struts and JSTL, use a c:forEach loop, with the end value being the number of children parameters; At 11:00 AM 6/30/2005, Dewitte Rémi wrote: Hello ! In my form , i ask the number of children. On the next page, i'd like to display as many textboxes as children to get their name. logic:iterate provides iteration on array or collection, how can i iterate on the number of children ? Thanks ! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.comhttp://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax)
Apache-Tomcat Servlet Mapping Issues
System: Solaris SunOS 5.9 Apache: 2.0.52 Tomcat: 4.1.31 Mod JK: 1.2.6 The problem: Apache/mod_jk cannot resolve servlet URL mappings When Tomcat is running stand-alone, it can resolve servlet mappings without any problems; so that a page with this form definition: FORM name=login method=POST action=loginhandler correctly invokes the com.company.LoginHandler servlet (which suggests there's nothing syntactically wrong with the servlet and servlet-mapping entries in web.xml); When Tomcat stand-alone is turned off and Apache is turned on, that same page always throws a 404 error for site/loginhandler; these are the error messages in mod_jk.log: [Wed Jun 22 09:04:08 2005] [mod_jk.c (2313)]: mod_jk::jk_translate, check alias_dir: /usr/apache/tomcat/webapps [Wed Jun 22 09:04:08 2005] [mod_jk.c (2337)]: mod_jk::jk_translate, AutoAlias child_dir: loginhandler [Wed Jun 22 09:04:08 2005] [mod_jk.c (2363)]: mod_jk::jk_translate, AutoAlias OK for file: /usr/apache/tomcat/webapps/aiwosc/loginhandler [Wed Jun 22 09:04:08 2005] [jk_uri_worker_map.c (445)]: Into jk_uri_worker_map_t::map_uri_to_worker [Wed Jun 22 09:04:08 2005] [jk_uri_worker_map.c (459)]: Attempting to map URI '/aiwosc/loginhandler' [Wed Jun 22 09:04:08 2005] [jk_uri_worker_map.c (577)]: jk_uri_worker_map_t::map_uri_to_worker, done without a match What terribly simple configuration error have I made here? These are the web.xml entries for this servlet: servlet servlet-nameloginhandler/servlet-name servlet-classcom.company.aiwosc.LoginHandler/servlet-class /servlet servlet-mapping servlet-nameloginhandler/servlet-name url-pattern/loginhandler/url-pattern /servlet-mapping This is the workers.properties file: worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=server.org worker.ajp13.type=ajp13 This is the app section from mod_jk.conf: server.org:/aiwosc # Static files Alias /aiwosc /var/apache/tomcat/webapps/aiwosc Directory /var/apache/tomcat/webapps/aiwosc Options Indexes FollowSymLinks DirectoryIndex index.html /Directory # Deny direct access to WEB-INF and META-INF # Location /aiwosc/WEB-INF/* AllowOverride None deny from all /Location Location /aiwosc/META-INF/* AllowOverride None deny from all /Location JkMount /aiwosc/addtitleservlet ajp13 JkMount /aiwosc/submittitleservlet ajp13 JkMount /aiwosc/transfertitleservlet ajp13 JkMount /aiwosc/saveoscservlet ajp13 JkMount /aiwosc/reordercastservlet ajp13 JkMount /aiwosc/loginhandler ajp13 JkMount /aiwosc/editcategoryservlet ajp13 JkMount /aiwosc/edittitleservlet ajp13 JkMount /aiwosc/addaddendumservlet ajp13 JkMount /aiwosc/*.jsp ajp13 JkMount /aiwosc/addcategoryservlet ajp13 This is the Context entry for the app in server.xml: !-- Oscars OSC Context -- Context path=/aiwosc docBase=aiwosc debug=5 reloadable=true crossContext=true Logger className=org.apache.catalina.logger.FileLogger prefix=aiwosc_log. suffix=.txt timestamp=true/ Resource name=jdbc/oscars auth=Container type=javax.sql.DataSource/ ResourceParams name=jdbc/oscars parameter namefactory/name valueorg.apache.commons.dbcp.BasicDataSourceFactory/value /parameter parameter namedriverClassName/name valueoracle.jdbc.driver.OracleDriver/value /parameter parameter nameurl/name valuejdbc:oracle:thin:@gtsora2.gtsgraphics.com:1521:ACAD/value /parameter parameter nameusername/name valueIMPC_ADMIN/value /parameter parameter namepassword/name valuePIRANHA/value /parameter parameter namemaxActive/name value20/value /parameter parameter namemaxIdle/name value10/value /parameter parameter namemaxWait/name value-1/value /parameter /ResourceParams /Context And these are the mod_jk load/configuration entries from httpd.conf: IfModule !mod_jk.c LoadModule jk_module modules/mod_jk.so /IfModule Include /usr/apache/tomcat/conf/auto/mod_jk.conf JkWorkersFile /usr/apache/tomcat/conf/workers.properties JkLogFile /usr/apache/logs/mod_jk.log JkLogLevel debug JkLogStampFormat [%a %b %d %H:%M:%S %Y] JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories JkRequestLogFormat %w %V %T JkAutoAlias /usr/apache/tomcat/webapps JkMount /*.jsp ajp13 JkMount /*/servlet/ ajp13 -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit
Re: Concurrent login detection - how?
Don't know if this is an optimum solution, but it should work: Keep a List or Vector of IDs for active users in a shared, application-level object (probably ServletContext); When someone logs in, search the List for the submitted ID: if not present, continue with login sequence; if present, kick them to the duplicate login page; Remove IDs from the List when users log out (and add a ServletContextListener to catch people who leave the site without logging out--remove their IDs when their sessions time out); At 09:22 AM 6/14/2005, you wrote: What is the best way to detect two people being logged in concurrently using the same account? This is one aspect of my efforts to restrict fraudulent access. Again, I don't want to use Acegi since it seems to break the rest of my app. So, what's the best way to do this 'traditionally'? Thanks! Michael - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.comhttp://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax)
Re: Concurrent login detection - how?
A HttpSessionListener implements a sessionDestroyed() method, which receives a HttpSessionEvent object from the servlet container when a session is about to be invalidated (the timing undoubtedly depends upon the container); the HttpSessionEvent object has a getSession() method, which returns the HttpSession object about to be invalidated, from which you can get the session ID other information to identify the affected user; At 01:28 PM 6/14/2005, Michael Mehrle wrote: That actually goes to the heart of my question: HOW do I detect when their session times out? ;-) I know the 'strategy' of doing this, but I don't know how to capture a timed-out session - technically. Any input would be welcome. TIA, Michael - Original Message - From: David Rickard [EMAIL PROTECTED] To: Tomcat Users List tomcat-user@jakarta.apache.org Sent: Tuesday, June 14, 2005 9:53 AM Subject: Re: Concurrent login detection - how? Remove IDs from the List when users log out (and add a ServletContextListener to catch people who leave the site without logging out--remove their IDs when their sessions time out); At 09:22 AM 6/14/2005, you wrote: What is the best way to detect two people being logged in concurrently using the same account? This is one aspect of my efforts to restrict fraudulent access. Again, I don't want to use Acegi since it seems to break the rest of my app. So, what's the best way to do this 'traditionally'? Thanks! Michael - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.comhttp://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax) -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.comhttp://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax)
Tomcat Startup/Shutdown and mod_jk Issues
System: SunOS 5.9 Generic_117171-13 sun4u sparc SUNW,Sun-Fire-V440 Apache: 2.0.52 Tomcat: 5.5.4 Connector: jk-1.2.6 Java: JDK 1.5.0.01 We're attempting an upgrade from Tomcat 4.1.31 to 5.5.4; we are using JK 1 as a connector to Apache (due to prior experience and relative simplicity); We are encountering three issues: 1) During start-up, Tomcat throws the following error messages: java.lang.NoSuchMethodError: org.apache.naming.NamingContextEnumeration.init(Ljava/util/Iterator;)V [ for each application it attempts to deploy] SEVERE: Catalina.start: LifecycleException: Protocol handler start failed: java.net.BindException: Address already in use:8080 [presumably from Tomcat not releasing 8080 properly during previous start-up/shut-down cycles] 2) During shut-down, Tomcat throws the following error: SEVERE: Protocol handler pause failed java.lang.NullPointerException at org.apache.jk.server.JkMain.pause(JkMain.java:655) 3) The mod_jk.conf file does not build; its entire contents are: ## Auto generated on Tue Jan 18 16:24:18 PST 2005## IfModule !mod_jk.c LoadModule jk_module /usr/apache/modules/jakarta-tomcat-connectors-jk-1.2.6-solaris8-sparc-apache-2.0.43_ native.so /IfModule JkWorkersFile /var/apache/tomcat/conf/jk/workers.properties JkLogFile /var/apache/tomcat/logs/mod_jk.log JkLogLevel emerg VirtualHost spinach.techbooks.com ServerName spinach.techbooks.com /VirtualHost [presumably this is from applications not loading during start-up; but could it be from some other cause?] -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.comhttp://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax)
Tomcat Won't Shutdown
System: SunOS 5.9 Generic_117171-13 sun4u sparc SUNW,Sun-Fire-V440 Apache: 2.0.52 Tomcat: 4.1.31 Connector: jk-1.2.6 We installed Apache and Tomcat without error (built Apache from source, loaded Tomcat from binary), and configured the connector so that they were talking correctly (the /examples/jsp/ site comes up fine); We experimented with an application that would use a ServletContextListener and the Jakarta Commons/Configuration package to load application variables t startup; the ServletContextListener by itself worked fine--i.e., it loaded hard-coded variables into ServletContext and they could be retrieved by JSPs, servlets etc; The problems started when we added Commons/Configuration to the ServletContextListener: the application would not load, and catalina.out listed various ClassNotFound errors for needed Jakarta Commons classes (from digester, logging etc)--even though the jars are in tomcat/commons/lib; so we placed the latest JARs for commons-lang, commons-digester, commons-logging in the application WEB-INF/lib directory; the application started loading, though the ServletContextListener could not find the configuration files--kept spitting out Exception caught opening stream to URL errors (which is presumably just a file-pathing issue); Only something has been stepped on, because Tomcat will no longer shut down: when we execute shutdown.sh, it throws the following error: Jan 14, 2005 4:40:43 PM org.apache.commons.digester.Digester startElement SEVERE: Begin event threw exception java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer [full stack trace is in the attached file] And catalina.out records the following errors when we try to execute startup.sh: Jan 14, 2005 4:43:03 PM org.apache.coyote.http11.Http11Protocol init SEVERE: Error initializing endpoint java.net.BindException: Address already in use:8080 Obviously, port 8080 is already in use because Tomcat hasn't released it--because it didn't shutdown as requested; our questions are: 1) What got stepped on in Tomcat to cause this behavior? 2) Is there another way to stop Tomcat (other than system reboot), to see if we can get it to restart gracefully? 3) Is there a way to fix Tomcat, short of re-installing it? -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax) TOMCAT SHUTDOWN STACK TRACE Jan 14, 2005 4:40:43 PM org.apache.commons.digester.Digester startElement SEVERE: Begin event threw exception java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer at java.net.URLClassLoader$1.run(URLClassLoader.java:199) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:187) at java.lang.ClassLoader.loadClass(ClassLoader.java:289) at java.lang.ClassLoader.loadClass(ClassLoader.java:235) at org.apache.commons.digester.ObjectCreateRule.begin(ObjectCreateRule.java:204) at org.apache.commons.digester.Rule.begin(Rule.java:152) at org.apache.commons.digester.Digester.startElement(Digester.java:1286) at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source) at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.commons.digester.Digester.parse(Digester.java:1572) at org.apache.catalina.startup.Catalina.stop(Catalina.java:522) at org.apache.catalina.startup.Catalina.execute(Catalina.java:352) at org.apache.catalina.startup.Catalina.process(Catalina.java:129) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:156) Catalina.stop: java.lang.ClassNotFoundException
Tomcat Connections And Memory Usage
Apache Version: 2.0.47 Tomcat Version: 4.1.29 Connector: mod_jk Server: SunOS 5.9 Generic_112233-07 sun4u sparc SUNW,Ultra-250 Does Tomcat have a configurable maximum number of simultaneous connections (ala Apache's MaxClients property)? If so, how/where is this value configured? If not, is the connection limit determined by the front-end web server? or by machine resource limits? How do we determine how much memory Tomcat is using per connection? -- David Rickard Software Engineer TechBooks/GTS Your Single Source Solution! Los Angeles CA * York, PA * Boston,MA * New Delhi, India Visit us on the World Wide Web http://www.techbooks.comhttp://www.techbooks.com [EMAIL PROTECTED] 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 (Fax)
System Clock Issues with Webapps
Server: SunOS 5.9 Generic_112233-07 sun4u sparc SUNW,Ultra-250 Apache: 2.0.47 Tomcat: 4.1.29 Our server is used by divisions in multiple timezones, so the system clock is set to UTC to simplify log writing etc; Each system user--including root--has a profile which masks the system clock to the appropriate time zone; root is masked to US-Pacific, the physical location of the server (confirmed by running date as root). Apache and Tomcat run as root processes and should use root's profile; however, they sometimes bypass the profile and report UTC date/time value (evidenced by outputting the value of a java.util.Date in a JSP). Doing an Apache/Tomcat restart will correct this system--so that our time JSP reports US-Pacific time as expected; however, Apache/Tomcat will revert (usually in less than a day) to reporting UTC time. Any ideas on why this is happening? and how we can correct it? -- David Rickard Software Engineer The GTS Companies A TechBooks Company -- The GTS Companies: GTS Publishing Services, GTS Graphics, GTS Innova: Your Single-Source Solution! Los Angeles CA * York, PA * Boston MA * New Delhi, India -- [EMAIL PROTECTED] Visit us on the World Wide Web http://www.gtscompanies.com 5650 Jillson St., Los Angeles, CA 90040 (323) 888-8889 x331 (323) 888-1849 [fax]
