Remote debugging maven jetty with IntelliJ Idea in Ubuntu 11.10

Jetty web server is an open source http server/client container which can be used to run and test webapps.  Jetty server provides a plugin to integrate with apache maven and it can be used to run a webapp in a maven project. To do this we need to add jetty-maven-plugin into our <plugins> section by adding it into webapp pom.xml file.

<plugin>
            <groupId>org.mortbay.jetty</groupId>
            <artifactId>maven-jetty-plugin</artifactId>
            <version>6.1.10</version>
            <configuration>
               <webXml>${project.build.directory}/jetty/WEB-INF/web.xml</webXml>
               <webAppConfig>
                  <contextPath>/${webapp.name}</contextPath>
                  <!--enable reloading static resources -->
                  <overrideDescriptor>src/test/resources/override-web.xml</overrideDescriptor>
               </webAppConfig>
               <scanIntervalSeconds>10</scanIntervalSeconds>
            </configuration>
         </plugin>


Now add the following Maven Options line into your .bashrc file.

For JDK 1.3 or above :

export MAVEN_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000"

For below JDK 1.3:

export MAVEN_OPTS="-Xnoagent -Djava.compiler=NONE -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000"

Goto the webapp folder from terminal and enter,

 mvn jetty:run

Jetty server will start on debug mode and will listen on port 8000 now. The following info will be appeared in terminal.

Goto IntelliJ Idea project and create a remote debug confiruation giving following parameters. (to do this follow the path Run --> Edit Configurations. Click on the + button followed by Remote and you will see remote configuration window appears)


Host = localhost
Port = 8000

Run the remote debug and it will also listen on port 8000 now.

Configuring proxy settings for Apache Maven

Ever wondered how to build your project with Apache Maven via a proxy server? This is a brief tutorial on how to do so.

Environment : Ubuntu 11.10 Oneiric

                        Apache maven 2.2.1

Apache maven holds all the configuration data in a single file called settings.xml file inside the 'conf' directory in the main directory of maven. The file includes configuration details regarding the proxies therefore we need to edit that section in order to enable the proxy server for a maven build.

This is how to do it.

• Download the maven binary distribution from Apache Maven downloads page. The newest version is 3.0.4 however the stable version is 2.2.1 for the existing projects which are not upgraded into maven 3.

• Extract the binary distribution into somewhere in your hard disk. apache-maven-2.2.1 directory will be visible now. Browse to the 'conf' directory inside 'apache-maven-2.2.1' main directory.

• The 'settings.xml' file is inside the 'conf' directory. Open the file with a text editor and uncomment the section between <proxy> </proxy> tags. Edit the <proxy> entry as follows.

<proxies>
    <!-- proxy
     | Specification for one proxy, to be used in connecting to the network.
     | -->
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>MYHOST.LK</host>
      <port>3200</port>
      <nonProxyHosts>www.google.com|*.somewhere.com</nonProxyHosts>
    </proxy>
   
  </proxies>

• Replace the MYHOST.LK address with the host address of your proxy server and replace the port number with relevant proxy port too. Save and close the file, now and you are ready to build via a proxy :)