I am reading Mahout in Action and working through the first example in chapter 2.
$ javac RecommenderIntro.java
RecommenderIntro.java:2: error: package org.apache.mahout.cf.taste.impl.model.file does not exist
import org.apache.mahout.cf.taste.impl.model.file.*;
^
RecommenderIntro.java:3: error: package org.apache.mahout.cf.taste.impl.neighborhood does not exist
import org.apache.mahout.cf.taste.impl.neighborhood.*;
^
RecommenderIntro.java:4: error: package org.apache.mahout.cf.taste.impl.recommender does not exist
import org.apache.mahout.cf.taste.impl.recommender.*;
I installed Mahout via yum:
$ sudo yum install mahout
...
Downloading Packages:
mahout-0.7+12-1.cdh4.2.0.p0.9.el6.noarch.rpm | 94 MB 05:17
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : mahout-0.7+12-1.cdh4.2.0.p0.9.el6.noarch 1/2
Cleanup : mahout-0.7+8-1.cdh4.1.2.p0.12.el6.noarch 2/2
Verifying : mahout-0.7+12-1.cdh4.2.0.p0.9.el6.noarch 1/2
Verifying : mahout-0.7+8-1.cdh4.1.2.p0.12.el6.noarch 2/2
Updated:
mahout.noarch 0:0.7+12-1.cdh4.2.0.p0.9.el6
Complete!
I am also completely brand new to Java.
Am I compiling this incorrectly?
Do I need to specify some include paths on the command line with invoking javac?
So it turns out this is simple, once you know where the jars you need are located. In the cloudera mahout distribution they are in /usr/lib/mahout and /usr/lib/mahout/lib.
$ javac -cp "/usr/lib/mahout/*:/usr/lib/mahout/lib/*:." RecommenderIntro.java
$ java -cp "/usr/lib/mahout/*:/usr/lib/mahout/lib/*:." RecommenderIntro
RecommendedItem[item:104, value:4.257081]