Created
June 19, 2013 14:37
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Database Model for Mahout
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import java.util.List; | |
import org.apache.mahout.cf.taste.common.TasteException; | |
import org.apache.mahout.cf.taste.impl.model.jdbc.MySQLJDBCDataModel; | |
import org.apache.mahout.cf.taste.impl.recommender.slopeone.SlopeOneRecommender; | |
import org.apache.mahout.cf.taste.model.JDBCDataModel; | |
import org.apache.mahout.cf.taste.model.PreferenceArray; | |
import org.apache.mahout.cf.taste.recommender.RecommendedItem; | |
import org.apache.mahout.cf.taste.recommender.Recommender; | |
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource; | |
class DbDataModel { | |
private DbDataModel() { | |
} | |
public static void main(String[] args) { | |
MysqlDataSource dataSource = new MysqlDataSource(); | |
dataSource.setServerName("localhost"); | |
dataSource.setUser("root"); | |
dataSource.setPassword("password"); | |
dataSource.setDatabaseName("mia01"); | |
JDBCDataModel model = new MySQLJDBCDataModel(dataSource, | |
"taste_preferences", "user_id", "item_id", "preference", null); | |
Recommender recommender = null; | |
try { | |
recommender = new SlopeOneRecommender(model); | |
} catch (TasteException e1) { | |
e1.printStackTrace(); | |
System.exit(-1); | |
} | |
recommender.refresh(null); | |
List<RecommendedItem> r = null; | |
try { | |
r = recommender.recommend(1, 5); | |
} catch (TasteException e1) { | |
// TODO Auto-generated catch block | |
e1.printStackTrace(); | |
} | |
System.out.println(r); | |
System.out.println(model); | |
try { | |
PreferenceArray v = model.getPreferencesFromUser(2); | |
v.sortByValue(); | |
System.out.println(v); | |
} catch (TasteException e) { | |
// TODO Auto-generated catch block | |
e.printStackTrace(); | |
} | |
} | |
} |
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