Main aim is to use IntelliJ IDEA in Ubuntu for Java based web applications.
With Maven and Jetty through its plugin as the server
And speeding up development with JRebel
1.a Why?
The combination of Ubuntu, IntelliJ, Maven, Jetty and JRebel enables really quick web app development in Java.
Ubuntu. Feel handicapped when forced to use dumbdowned Windows at work.
Maven. A build system with flaws but still better than most, and especially important as it is used by most projects.
IntelliJ IDEA. An IDE with many ingenious little tricks to make development speedier and feels very comfortable to use. At work my IDE is often either Eclipse on some projects as it often is the company standard, or NetBeans when work refuse to buy IntelliJ licenses. But with some clients and at home with my FOSS license I am much more productive with IntelliJ.
Jetty. A standalone java web application server. It is quick and very light. The Maven plugin for it makes it easy to bundle and launch locally. It also then allows for very swift development cycles.
JRebel. JRebel (Née JavaRebel) reloads java classes dynamically and allows even swifter development cycles, by negating the need to ever redeploy. This saves a lot of time, thus money, and improves quality with quicker feedback loops.
And I need these tools to work together seamlessly. 1.b Prerequisites
Ubuntu
I will assume you have a normal version of Ubuntu Desktop installed. This guide was based upon Ubuntu 10.04 lucid lynx.
Project
A normal java based webapp project buildt with maven that are using the jetty plugin is assumed to be checked out on your machine. If you do not have one set up, you can read up on java, maven & jetty and clone an example app of mine.
2 Java 2.a Install Java
sudo aptitude install sun-java6-jdk 2.b Configure Java
In case of other Java JDK are installed, choose Sun's flavour
sudo update-alternatives --config java sudo update-alternatives --config javac
Environment variables
sudo vi /etc/profile.d/java.sh export JAVA_HOME=/usr/lib/jvm/java-6-sun
export JDK_HOME=/usr/lib/jvm/java-6-sun sudo chmod +x /etc/profile.d/java.sh
3 Maven 3.a Install Maven
Your choice: either install via Ubuntu package repository or download the full Maven directly. The repository version depends on a load of unneccesary packages such as gjc, Ant etc. So most people recommend using the apache.org dowload instead.
For this howto I will utilise the repository version, but the only difference afterwards is the path. (You may try and restrict the installation of optional packages...)
sudo aptitude install maven2
If you prefer the downloaded archive then do this instead:
tar xzf apache-maven-2.2.1.tar.gz;
sudo mkdir /opt/apache;
sudo mv apache-maven-2.2.1 /opt/apache/maven-2.2.1;
cd /opt/apache;
sudo ln -s maven-2.2.1 maven;
And refer to /opt/apache/maven instead of /usr/share/maven2 in the paths below. 3.b Configure Maven
Some programs depend on different environment variables for Maven.
Also the default memory assignment is very low so you may optionally add it.
sudo vi /etc/profile.d/maven.sh export MAVEN_HOME=/usr/share/maven2
export M2_HOME=/usr/share/maven2
#export MAVEN_OPTS=-Xms128M -Xmx512M -XX:MaxPermSize=256m
#export MAVEN_OPTS=-noverify -javaagent:$JREBEL_HOME/jrebel.jar
sudo chmod +x /etc/profile.d/maven.sh 3.b.i Settings.xml
Depending on your project you may need to configure the default maven settings, such as any mirrors you use, passwords, other repositories, profiles etc.
But that is out of scope of this document.
mkdir ~/.m2;
vi ~/.m2/settings.xml 3.c Download the internet
Because of maven dependency characteristics it is wise to do an initial a simple clean & build of your application do download all the dependencies, and the special go-offline goal. Remember to include any potential profiles if they have dependencies. ( -P profile1,profile2....)
This may take a while.... But you only have to do it once (ish..)
cd /path/to/your/project,
mvn clean;
# Wait a little while....
mvn dependency:go-offline;
# Wait a long while....
mvn install;
# Wait a longer while....
mvn jetty:run;
# Wait a longish while....
When ready kill Jetty with ^C (As in ctrl+c)
Remember from now on you should mostly do append -o parameter (offline) to speed up builds.
4 JRebel 4.a JRebel license
You need to obtain a license to run JRebel.
You can use the trial version for 30 days. (Its worth it)
Note: ZeroTurnaround do offer free licenses for open source developers. 4.b Download JRebel
Download the generic JAR installer 4.c Install JRebel
cd /tmp;
unzip ~/Downloads/jrebel-*-setup.zip;
sudo -jar jrebel/jrebel-setup.zip
I tend to choose /opt/ZeroTurnaround/JRebel as my install path, but the default it /usr/local/ZeroTurnaround/Jrebel. 4.d Configure JRebel
If the installer doesn't trigger the configuration, or you want to reconfigure:
sudo /opt/ZeroTurnaround/JRebel/bin/jrebel-config.sh
Choose "IntelliJ 8.x or later" as IDE
Tick "I use maven to build my application"
Tick "I run the server from my IDE"
Click Next and read how JRebel integrates with IntelliJ.
Click Next and read how JRebel integrates with Maven, you may want to update your projects Pom file.
Click Next and read how the servers inside IDEs are affected.
A usefull tip is the ctrl+s remaped keyboard shortcut
In the top right click on "Configure manually"
In "Java version" choose "Java 5 or later"
In "Operating System" choose "Unix-like (Linux, Mac OS C, etc)"
In "Server" choose "Maven Jetty Plugin"
Read how you should update your projects pom.xml by setting the scanIntervalseconds to 0
Add the jrebel line to maven opts sudo vi /etc/profile.d/maven.sh And then uncomment or add the MAVEN_OPTS line: export MAVEN_OPTS="-noverify -javaagent:/opt/ZeroTurnaround/JRebel/jrebel.jar $MAVEN_OPTS"
Click Next
Tick "Log to file"
Set "Custom log file location" to "/var/log/jrebel/jrebel.log". Create the jrebel log folder: sudo mkdir /var/log/jrebel;
sudo chown jrebel:jrebel /var/log/jrebel
Pick your plugins..
Click Next and Finish
sudo vi /etc/profile.d/jrebel.sh export JREBEL_HOME=/opt/ZeroTurnaround/JRebel sudo chmod +x /etc/profile.d/jrebel.sh
5 IntelliJ IDEA 5.a IntelliJ license
Decide which version you want. I will assume a trial of the ultimate edition.
Note: JetBrains do offer free licenses for IntelliJ Ultimate for open source developers. 5.b Download IntelliJ
Go to JetBrains IntelliJ download page, and download the most recent version. 5.c Install IntelliJ
Like JRebel I prefer /opt/jetbrains as my install location. You may prefer directly in /opt or in /usr/local, etc.
cd /tmp;
tar xzf ~/Downloads/ideaIU-10.0.1.tar.gz;
sudo chown -R root:root idea-IU-99.32;
sudo mkdir /opt/jetbrains;
sudo mv idea-IU-99.32/opt/jetbrains/;
sudo cd /opt/jetbrains;
sudo ln -s idea--IU-99.32 idea; 5.c.i Add IntelliJ to the menu
Select System/Preferences/Main Menu
In the left column, select Programming
Click New item
Enter "IntelliJ IDEA" as the Name
Enter /opt/jetbrains/idea/bin/idea.sh as the Command
Click on the icon on the left to choose icon.
Enter /opt/jetbrains/idea/bin/ in the Location field
Choose idea128.png as the icon and click on Open
Then OK, then Close
5.d Configure IntelliJ
On first launch IntelliJ will ask you a series of questions regarding plugins etc.
Choose maven plugin amongst others. 5.d.i Configure Maven in IntelliJ
Open settings via File/Settings/maven and enter Maven home directory as /usr/share/maven2 5.d.ii Install & configure JRebel plugin in IntelliJ
Open the plugins section via File/Settings/Plugins
Choose the Available tab
Search for JRebel
Right click on JRebel Plugin and choose Download and install
Once installed go to File/Settings/JRebel
Enter /opt/ZeroTurnaround/JRebel/jrebel.jar in JRebel location
6 Your project 6.a Import project into IntelliJ
Find your project via File/New project
Choose Import project from External model
Select Maven
Find your project root
Check Environment settings still refer to /usr/share/maven2 as Maven location
Wait awhile for IntelliJ to load the new project information
7 Jetty 7.a Run Jetty in IntelliJ
In IntelliJ, click to open Maven Projects on the right hand side
Expand
your project
Plugins
Jetty
Right clik on jetty:run
I choose the top option Run Maven build, which is the same as if I double clicked on jetty:run.
( Others say you should choose Run with JRebel, but the top option works for me, and the JRebel action actually gives me an error that maven is not configured...)
8 Extension 8.a Compile on save
IntelliJ does not support Compile-on-save / Auto-build.
This feature is essential to get the best time saving from using JRebel.
So you will have to manually enter ctrl++shift+F9 to compile your file, or just ctrl+F9 to build your whole project.
A decent work around is to map ctrl+s as the build command.
Another is to install a plugin called Eclipse Mode, which auto build like eclipse.
(I have not been able to get this to work as expected)
9 References
Matt Raible's tips on IntelliJ on Mac OS X
10 Feedback
If you find any elements are missing, please let me know.
If you spot any errors, please let me know.
If there are elements you want to discuss, the Ubuntu forums are very busy and usefull.
If you found this helpfull, why not buy a t-shirt from my shop?
If you would like committed help from me, consider hiring me?
If you write/find similar howto, or even one based on these, please let me know so I can link to it!
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发表于 2017-2-27 11:47:32
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