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 /*
  * Copyright [2013-2014] eBay Software Foundation
  *  
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *    http://www.apache.org/licenses/LICENSE-2.0
  *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ml.shifu.guagua.mapreduce.example.kmeans;
import  org.apache.hadoop.conf.Configuration;
import  org.apache.hadoop.fs.FSDataOutputStream;
import  org.apache.hadoop.fs.FileSystem;
import  org.apache.hadoop.fs.Path;
import  org.apache.hadoop.io.IOUtils;
KMeansDataOutput is used to save tagged data into HDFS.
    private static final Logger LOG = LoggerFactory.getLogger(KMeansDataOutput.class);
    @Override
        Path outFolder = new Path(context.getProps().getProperty(.,
                "part-g-" + context.getContainerId()));
        String separator = context.getProps().getProperty(.);
        @SuppressWarnings("unchecked")
        List<TaggedRecorddataList = (List<TaggedRecord>) context.getAttachment();
        PrintWriter pw = null;
        try {
            FileSystem fileSystem = FileSystem.get(new Configuration());
            fileSystem.mkdirs(outFolder);
            Path outputFile = new Path(outFolder"part-g-" + context.getContainerId());
            FSDataOutputStream fos = fileSystem.create(outputFile);
            .info("Writing results to {}"outputFile.toString());
            pw = new PrintWriter(fos);
            for(TaggedRecord recorddataList) {
                pw.println(record.toString(separator));
            }
            pw.flush();
        } catch (IOException e) {
            .error("Error in writing output."e);
        } finally {
            IOUtils.closeStream(pw);
        }
    }
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