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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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
import  org.apache.hadoop.conf.Configuration;
import  org.apache.hadoop.fs.FSDataOutputStream;
import  org.apache.hadoop.fs.FileSystem;
import  org.apache.hadoop.fs.Path;
LogisticRegressionOutput is used to write the final model output to file system.
public class LogisticRegressionOutput extends
    private static final Logger LOG = LoggerFactory.getLogger(LogisticRegressionOutput.class);

Get output file setting and write final sum value to HDFS file.
        .info("Starts to write final value to file.");
        Path out = new Path(context.getProps().getProperty("lr.model.output"));
        .info("Writing results to {}"out.toString());
        PrintWriter pw = null;
        try {
            FSDataOutputStream fos = FileSystem.get(new Configuration()).create(out);
            pw = new PrintWriter(fos);
        } catch (IOException e) {
            .error("Error in writing output."e);
        } finally {
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