configuring pache tomcat and eclipse in ubuntu

Download Eclipse;

use the Eclipse Update Manager to install all packages from the category Web, XML, Java EE Development and OSGi Enterprise Development, except “PHP Development” and the “RAP” Tooling;

while you wait for the installation of the packages you can install tomcat7 by running from terminal:

sudo apt-get install tomcat7 tomcat7-docs tomcat7-examples tomcat7-admin -y

configure WTP to use Tomcat:

1. select Windows -> Preferences -> Server -> Runtime Environments;
2. press Add…;
3. select “Apache Tomcat v7.0″;
4. enter “/usr/share/tomcat7″ into the “Tomcat installation directory” field;
5. press Ok;

create a new “Dynamic Web Project”

• as Target Runtime select “Apache Tomcat v7.0″;
• press twice Next;
• select the “Generate the web.xml deployment descriptor” option at the final dialog;
• press Finish;

close Eclipse;

to fix the error “Cannot create a server using the selected type” run the following:

cd ~/workspace/.metadata/.plugins/org.eclipse.core.runtime/.settings/
rm org.eclipse.jst.server.tomcat.core.prefs
rm org.eclipse.wst.server.core.prefs

to fix the error “Could not load the Tomcat server configuration at /usr/share/tomcat7/conf. The configuration may be corrupt or incomplete. /usr/share/tomcat7/conf/catalina.policy (No such file or directory)” run the following commands:

cd /usr/share/tomcat7
sudo ln -s /var/lib/tomcat7/conf conf
sudo ln -s /etc/tomcat7/policy.d/03catalina.policy conf/catalina.policy
sudo ln -s /var/log/tomcat7 log
sudo chmod -R 777 /usr/share/tomcat7/conf

to fix the error “Could not load the Tomcat server configuration at /Servers/Tomcat v7.0 Server at localhost-config. The configuration may be corrupt or incomplete” run the following commands:

cp /etc/tomcat7/* workspace/Servers/Tomcat\ v7.0\ Server\ at\ localhost-config/

log out and log back in;

open Eclipse;

open the server view:

• go to Window->Show View->Other…;
• choose the Servers under the Server category;

click on “new server wizard”;

• choose Apache / Tomcat v7.0 Server and press Next;
• enter “/usr/share/tomcat7″ into the “Tomcat installation directory” field;
• press Next;
• select your project on the left pane under “Available” and press Add> to move it to the right pane under “Configured”;
• press Finish”;

to be able to start the Tomcat server from Eclipse you need first to stop the one running in background:

sudo service tomcat7 stop

and to disable Tomcat to automatically start at boot run:

sudo update-rc.d tomcat7 disable

download the zip of Jersey;

put the the jersey jars into the folder “WEB-INF/lib” and add them to the project build path;

create your first RESTful Webservice by following this tutorial by Lars Vogel.

Your web services will be automatically deployed in the following folder:

~/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/

Your web service will be accessible through the following URI:

http://localhost:8080/EclipseProjectName/x/y/z

Where:

1. x = the root of your service set inside the tag url-pattern in web.xml;
2. y = the path set for your class
3. z = the path set for your method