Yes you can. You can deploy 2 separate tomcat's each with their own ports, contexts, etc. This will allow you to run your apps in 2 separate VMs, so they can use different versions of classes etc.
This was in Tomcat 3.23-3.3. I think 4 should work the same way with this? jchuang ----- Original Message ----- From: "Martin v. Boehlen" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, January 08, 2002 2:04 PM Subject: class loading tc 3.3 & virtual hosts > Greetings Users, > > is it possible to use two completely separate virtual hosts > with tomcat ? > What I want to do is using two virtual hosts on the same box. > One for real web serving and one for development. > > My problems so far are: > 1. Class loading - > Can I configure tomcat in a way that classes don't > interfere between virtual hosts ? > 2. Context scope - > Can I use JkMount with a single path for all > applications ? > 3. Host aliases > Can I do an 'AutoWebApp' for an 'Alias' and > a full host name at the same time ? > > Please note, that: > The application name is 'jRolodex', but I used the 'numguess.jsp' > example for testing. > 'www' is the web host and > 'javadex' is the development host. > > A 'build.sh all' copies the application files to host 'javadex' > i.e. the 'docBase' directory of virtual host > 'javadex.tiade-voboe.de'. > > A 'build.sh dist' produces a 'jRolodex.war' and a 'jRoldex.jar' > in the 'docBase' directory of host 'www.tiade-voboe.de'. > > Before I plunge into the details, please look at the partial > config files, stack and SW version at the end of this mail. > > Now the gory details: > > ad 1. When i change some code in the application and afterwards do a > 'build.sh all' for application 'jRolodex' without doing a > 'build.sh dist', the first virtual server I hit works fine! > No matter wether it is 'www' or 'javadex'. > The second server always gets an 'Error 500' (see error stack at > end of mail). > It seems to me, that tomcat does not load the appropriate class > definitions. > > ad 2. I tried to use '/wapps' as the context path (with and without a > 'prefix' in 'AutoWebApp') because I wanted something like > 'JkMount /wapps' in 'httpd.conf'. It didn't work. So I have > to mount every application explicitly. > > ad 3. I tried to use the 'Alias' definition in 'AutoWebApp'. I.e.: > <AutoWebApp dir="/usr/local/httpd/webapps/javadex" > prefix="/wapps" > host="javadex" /> > It worked fine but it didn't work for 'javadex.tiade-voboe.de' (and > vice versa). > > > <!-- --------------- httpd.conf START ---------------------------------- --> > # ----- The Waltons, Daltons, everyone > <VirtualHost www.tiade-voboe.de:80> > ServerAdmin [EMAIL PROTECTED] > ServerName www.tiade-voboe.de > DocumentRoot "/usr/local/httpd/htdocs/www" > ServerAlias www www.tiade-voboe.de > > <Directory "/usr/local/httpd/htdocs/www" > > Options Indexes -FollowSymLinks -Includes +MultiViews > Order deny,allow > Allow from all > </Directory> > > JkMount /*.jsp ajp13 > JkMount /wapps/jRolodex ajp13 > JkMount /wapps/jRolodex/* ajp13 > </VirtualHost> > > # ----- Tomcat developer > <VirtualHost javadex.tiade-voboe.de:80> > ServerAdmin [EMAIL PROTECTED] > ServerName javadex.tiade-voboe.de > DocumentRoot "/usr/local/httpd/htdocs/javadex" > ServerAlias javadex javadex.tiade-voboe.de > > # ----- Here comes the directory accessible by all users of the local > network > <Directory "/usr/local/httpd/htdocs/javadex" > > Options Indexes +FollowSymLinks -Includes +MultiViews > Order allow,deny > Allow from 192.168.17.0/255.255.255.0 > </Directory> > > JkMount /*.jsp ajp13 > JkMount /wapps/jRolodex ajp13 > JkMount /wapps/jRolodex/* ajp13 > </VirtualHost> > <!-- --------------- httpd.conf END ------------------------------------ --> > > <!-- --------------- apps-vhosts.xml START ----------------------------- --> > <?xml version="1.0" encoding="ISO-8859-1"?> > <Server> > > > <Host name="www.tiade-voboe.de"> > <Alias name="www" /> > <Context path="" > docBase="/usr/local/httpd/webapps/www" > debug="0" > reloadable="False" > > <SimpleRealm filename="conf/users/example-users.xml" /> > <LogSetter name="www_tc.log" > path="/var/log/tomcat/www_tc.log" > verbosityLevel="ERROR"/> > <LogSetter name="www_servlet_log" > path="/var/log/tomcat/www_servlet.log" > servletLogger="true" > verbosityLevel = "ERROR"/> > <AutoDeploy source="/usr/local/httpd/webapps/www" > target="/usr/local/httpd/webapps/www" /> > <AutoWebApp dir="/usr/local/httpd/webapps/www" > prefix="/wapps" > host="www.tiade-voboe.de" /> > </Context> > </Host> > > > <Host name="javadex.tiade-voboe.de"> > <Alias name="javadex" /> > <Context path="" > docBase="/usr/local/httpd/webapps/javadex" > debug="99" > reloadable="True" > <SimpleRealm filename="conf/users/example-users.xml" /> > <LogSetter name="javadex_tc.log" > path="/var/log/tomcat/javadex_tc.log" > verbosityLevel = "DEBUG"/> > <LogSetter name="javadex_servlet_log" > path="/var/log/tomcat/javadex_servlet.log" > servletLogger="DEBUG"/> > <AutoWebApp dir="/usr/local/httpd/webapps/javadex" > prefix="/wapps" > host="javadex.tiade-voboe.de" /> > </Context> > </Host> > > > </Server> > > <!-- --------------- apps-vhosts.xml END ------------------------------- --> > > > <!-- --------------- Error stack START - ------------------------------- --> > Error: 500Location: /wapps/jRolodex/numguess.jspInternal Servlet Error: > org.apache.jasper.JasperException: object is not an instance of declaring > class > at > org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(Unknown Source) > at org.apache.jasper.runtime.JspRuntimeLibrary.introspect(Unknown > Source) > at numguess_1._jspService(numguess_1.java:84) > at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) > at javax.servlet.http.HttpServlet.service(HttpServlet.java) > at org.apache.tomcat.facade.ServletHandler.doService(Unknown Source) > at org.apache.tomcat.core.Handler.invoke(Unknown Source) > at org.apache.tomcat.core.Handler.service(Unknown Source) > at org.apache.tomcat.facade.ServletHandler.service(Unknown Source) > at org.apache.tomcat.core.ContextManager.internalService(Unknown > Source) > at org.apache.tomcat.core.ContextManager.service(Unknown Source) > at > org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Unknown > Source) > at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Unknown Source) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(Unknown Source) > at java.lang.Thread.run(Thread.java:539) > Root cause: > java.lang.IllegalArgumentException: object is not an instance of declaring > class > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:42 ) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl .java:28) > at java.lang.reflect.Method.invoke(Method.java:327) > at > org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(Unknown Source) > at org.apache.jasper.runtime.JspRuntimeLibrary.introspect(Unknown > Source) > at numguess_1._jspService(numguess_1.java:84) > at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) > at javax.servlet.http.HttpServlet.service(HttpServlet.java) > at org.apache.tomcat.facade.ServletHandler.doService(Unknown Source) > at org.apache.tomcat.core.Handler.invoke(Unknown Source) > at org.apache.tomcat.core.Handler.service(Unknown Source) > at org.apache.tomcat.facade.ServletHandler.service(Unknown Source) > at org.apache.tomcat.core.ContextManager.internalService(Unknown > Source) > at org.apache.tomcat.core.ContextManager.service(Unknown Source) > at > org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Unknown > Source) > at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Unknown Source) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(Unknown Source) > at java.lang.Thread.run(Thread.java:539) > <!-- --------------- Error stack END------------------------------- --> > > > <!-- --------------- Software versions START ---------------------- --> > <!-- ---- Server side --> > srv01:~ # uname -a > Linux srv01.tiade-voboe.de 2.4.16 #38 SMP Fri Dec 28 20:37:27 CET 2001 i686 > unknown > srv01:~ # java -version > java version "1.4.0-beta3" > Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b84) > Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed mode) > srv01:~ # file /usr/local/httpd/tomcat > /usr/local/httpd/tomcat: symbolic link to jakarta-tomcat-3.3 > > <!-- ---- Client side --> > martin@maptop:~ > java -version > java version "1.3.1_02" > Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_02-b02) > Java HotSpot(TM) Client VM (build 1.3.1_02-b02, mixed mode) > martin@maptop:~ >konqueror --version > Qt: 2.3.0 > KDE: 2.1.2 > Konqueror: 2.1.1 > <!-- --------------- Software versions END ------------------------ --> > > -- > To unsubscribe: <mailto:[EMAIL PROTECTED]> > For additional commands: <mailto:[EMAIL PROTECTED]> > Troubles with the list: <mailto:[EMAIL PROTECTED]> > -- To unsubscribe: <mailto:[EMAIL PROTECTED]> For additional commands: <mailto:[EMAIL PROTECTED]> Troubles with the list: <mailto:[EMAIL PROTECTED]>
