8. Jakarta Tomcat

8.2.1. Java2

8.2.2. Download the binaries

Go to http://java.sun.com/j2se/1.3/ [1],choose your platform and follow the steps on the site. [Graph theory Study]

8.2.3. Installing the binaries

Execute the binary:

chmod +x j2sdk-1_3_1_02-linux-i386.bin

./2sdk-1_3_1_02-linux-i386.bin

After accepting the license, unpack the stuff and move the resulting directory to /usr/lib and set an appropriate symbolic link

8.3.1. Installing the binaries

cd /usr/local

tar -xvzf jakarta-tomcat-4.1.8.tar.gz

cd jakarta-tomcat-4.1.8

cd bin

rm *.bat

echo export JAVA_HOME=/usr/lib/java/ >> /etc/profile
. /etc/profile

To enable the Tomcat manager, you need to modify /usr/local/jakarta-tomcat-4.1.8/conf/tomcat-users.xml add a user admin or with the role manager. The result should look like this:

<?xml version='1.0' encoding='utf-8'?>
<tomcat-users>
  <role rolename="manager"/>
  <role rolename="tomcat"/>
  <role rolename="role1"/>
  <user username="admin" password="secret" roles="manager"/>
  <user username="tomcat" password="tomcat" roles="tomcat"/>
  <user username="role1" password="tomcat" roles="role1"/>
  <user username="both" password="tomcat" roles="tomcat,role1"/>
</tomcat-users>

Now you should be able to startup tomcat:

/usr/local/apache/jakarta-tomcat-4.1.8/bin/startup.sh

You should now be able to connect to: http://localhost:8080/index.jsp

8.4.1. Download the source

If you like to have a native interface into your Apache Webserver, you need to build mod_jk with must be downloaded separately here: http://jakarta.apache.org/builds/jakarta-tomcat-4.0/release/v4.1.18/src/jakarta-tomcat-connectors-4.1.18-src.tar.gz.

8.4.2. Building and installing

tar -xvzf jakarta-tomcat-connectors-4.1.18-src.tar.gz

cd jakarta-tomcat-connectors-4.1.18-src/jk/native

./buildconf
./configure --with-apxs=/usr/local/apache/bin/apxs

make
make install

8.4.3. Customizing

Now follows the annoying part, the customizing of the config files. First edit /usr/local/jakarta-tomcat-connectors-4.1.18-src/jk/conf/workers.properties .:: dk.pinterest.com ::. , and copy the file to /usr/local/apache/conf

I made a sample workers.properties that works with the example JSPs and servlets that comes with the Tomcat distribution. It is based on the sample workers.properties from Tomcat

workers.tomcat_home=/usr/local/jakarta-tomcat-4.1.18

# workers.java_home should point to your Java installation. Normally
# you should have a bin and lib directories beneath it.
#
workers.java_home=/usr/lib/java2

# You should configure your environment slash... ps=\ on NT and / on UNIX
# and maybe something different elsewhere.
#
ps=/

# The workers that your plugins should create and work with
#
worker.list=worker1

#------ DEFAULT ajp13 WORKER DEFINITION ------------------------------
#---------------------------------------------------------------------
# Defining a worker named ajp13 and of type ajp13
# Note that the name and the type do not have to match.
#
worker.worker1.port=8009
worker.worker1.host=localhost
worker.worker1.type=ajp13

#------ CLASSPATH DEFINITION -----------------------------------------
#---------------------------------------------------------------------
# Additional class path components.
#
worker.inprocess.class_path=$(workers.tomcat_home)$(ps)lib$(ps)tomcat.jar

# The JVM that we are about to use
#
# Unix - Sun VM or blackdown
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)i386$(ps)classic$(ps)libjvm.so

# Setting the place for the stdout and stderr of tomcat
#
worker.inprocess.stdout=$(workers.tomcat_home)$(ps)logs$(ps)inprocess.stdout
worker.inprocess.stderr=$(workers.tomcat_home)$(ps)logs$(ps)inprocess.stderr

Next, you need to configure your apache config file httpd.conf. The following example matches the examples provided by Tomcat. .:: docs.google.com ::.

LoadModule jk_module libexec/mod_jk.so
AddModule mod_jk.c

JkWorkersFile /usr/local/apache/conf/workers.properties
JkLogFile /var/log/httpd/mod_jk.log
JkLogLevel info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
JkRequestLogFormat "%w %V %T"
JkMount /examples/servlet/* worker1
JkMount /examples/*.jsp worker1 

After restarting Apache, you should now be able to connect to your JSP's via Apache. I.e: http://localhost/examples/jsp/num/numguess.jsp

For the further steps like installing your servlets and jsp-files, you are responsible by yourself... [Research on Cassandra]

	Environment Variables
	If Tomcat fails to start and/or your servlets could not be started the most common error made is having not all needed classes in the CLASSPATH variable.