001    /*
002     * Copyright 2011 Christian Kumpe http://kumpe.de/christian/java
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *     http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package de.kumpe.hadooptimizer.hadoop;
017    
018    import java.io.IOException;
019    
020    import org.apache.hadoop.io.DoubleWritable;
021    import org.apache.hadoop.mapreduce.Mapper;
022    
023    import de.kumpe.hadooptimizer.EaOptimizerConfigurationBase;
024    
025    public class MapperWithOptimizerConfiguration<I> extends
026                    Mapper<DoubleWritable, I, DoubleWritable, I> {
027            protected EaOptimizerConfigurationBase<I> configuration;
028    
029            @Override
030            @SuppressWarnings("unchecked")
031            protected void setup(final Context context) throws IOException,
032                            InterruptedException {
033                    super.setup(context);
034    
035                    configuration = (EaOptimizerConfigurationBase<I>) HadoOptimizerBase
036                                    .readConfiguration(context);
037    
038                    context.getCounter(HadoOptimizerBase.COUNTER_GROUP,
039                                    getClass().getSimpleName() + " instances").increment(1);
040            }
041    }