I’m reading “Mahout in Action” MEAP Edition, but it doesn’t teach how to construct a development environment of Mahout…
So I wrote the way of that by testing sample codes of “Mahout in Action”.
Install
I examine based on Windows 2008 x64.
Install several packages.
- Cygwin
- Java SDK 6u23 x64
- Eclipse 3.6(helios) SR1 x64
- Maven 3.0.2
- (Hadoop 0.21.0)
Hadoop is not used in this article.
Maven
I am not good at Maven… So I’ve read the following documents.
Maven 3 has “Maven 2 Repository”! 
Source of Mahout
Use not the binary but the source code of Mahout, because reference them in Eclipse.
- https://cwiki.apache.org/confluence/display/MAHOUT/Downloads
- https://cwiki.apache.org/confluence/display/MAHOUT/Version+Control
I used Mahout 0.4, but 0.5 SNAPSHOT may be better since Mahout’s API is fluid.
At first, start Eclipse and create a workspace. We take it “C:\Users\shuyo\workspace” for the present.
Extract the source of Mahout below the workspace. It is “C:\Users\shuyo\workspace\mahout-distribution-0.4″ for the present.
Convert Maven project of Mahout into Eclipse project with the below command.
cd C:\Users\shuyo\workspace\mahout-distribution-0.4 mvn eclipse:eclipse
Now set the classpath variable M2_REPO of Eclipse to Maven 2 local repository.
mvn -Declipse.workspace= eclipse:add-maven-repo
But “Maven – Guide to using Eclipse with Maven 2.x” says “Issue: The command does not work”. So set it in Eclipse directly.
- Open Window > Preferences > Java > Build Path > Classpath Valirables from Eclipse’s menu.
- Press “New” and Add Name as “M2_REPO” and Path as Maven 2 repository path (its default is .m2/repository at your user directory).
When M2_REPO doesn’t be set, the following errors are thrown.
The project cannot be built until build path errors are resolved Unbound classpath variable: 'M2_REPO/junit/junit/3.8.1/junit-3.8.1.jar' in project '********'
Finally import the converted Eclipse project of Mahout.
- Open File > Import > General > Existing Projects into Workspace from Eclipse menu.
- Select the project directory C:\Users\shuyo\workspace\mahout-distribution-0.4 and all projects.
Continued on the next post.
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when I tried this it showed..
cd C:\Users\shuyo\workspace\mahout-distribution-0.4
mvn eclipse:eclipse
Cannot execute mojo: eclipse. It requires a project with an existing pom.
what shall i do?
I tried doing the same but changed the directory into “mahout-collections-1.0″ (another zip that i download from mahout) and it worked successfully, I think because it contained pom file.
I need your reply urgently, I searched google for 2 hrs and no results
Thanks alot
“shuyo” is my user name
You should change the current directory according to your environment.
I know
.. I meant I tried it using my directory but it didn’t work, anyway I fixed the problem I discovered that I downloaded the binary zip instead of the source :S .. but thanks alot for the reply, I’ll complete the next steps hope it’ll work 
..
Mmm, I see. But I can’t reproduce it…
As the message said, is there a pom xml in the current directory?
I don ve the all projects folder in my mahout 0.4 distribution is it something i should create or what should be done pls help ? i am completely new to mahout and eclipse
Extremely helpful post. Thank you!
Respected Sir, I completly follows your steps, I am facing some errors at the end of this project. When i import mahout-distribution-0.7 project into my workspace(/home/saeed/workspace/mahout-distribution-0.7).
there are some missing files (OpenIntLongHashMap.java, math.function.IntObjectProcedure.java, math.set.OpenIntHashSet.java, etc) that require in another packages. What can i do sir,
My mahout is 0.7.
Excellent post thanks, sometimes simple thinks take the longest and this is so detailed you just cannot make mistakes
Just a typo in
“mvn -Declipse.workspace= eclipse:add-maven-repo”
It worked for me removing the space after “=” :
“mvn -Declipse.workspace=eclipse:add-maven-repo”