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- package grayscalefromfile_exc;
- import java.io.IOException;
- import java.io.FileInputStream;
- import java.io.File;
- import java.util.List;
- import java.util.Arrays;
- import java.util.Iterator;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.conf.Configured;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.io.IntWritable;
- import org.apache.hadoop.io.Text;
- import org.apache.hadoop.mapreduce.Job;
- import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
- import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
- import org.apache.hadoop.util.Tool;
- import org.apache.hadoop.util.ToolRunner;
- import org.apache.hadoop.util.GenericOptionsParser;
- import hipi.imagebundle.mapreduce.ImageBundleInputFormat;
- public class StubDriver extends Configured implements Tool {
- public int run(String[] args) throws Exception {
- Configuration conf = new Configuration();
- String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
- System.out.println("num of args: " + args.length + ":" + args[0] + "," + args[1]);
- if (args.length != 2) {
- System.out.println("Usage: dumphib <input hib> <outputdir>");
- System.exit(0);
- }
- String inputPath = args[0];
- String outputPath = args[1];
- Job job = new Job(conf);
- job.setJobName("grayscalefromfile_exc");
- job.setJarByClass(StubDriver.class);
- job.setMapperClass(StubMapper.class);
- job.setReducerClass(StubReducer.class);
- // Set formats
- job.setOutputKeyClass(IntWritable.class);
- job.setOutputValueClass(Text.class);
- job.setInputFormatClass(ImageBundleInputFormat.class);
- // Set out/in paths
- removeDir(outputPath, conf);
- FileOutputFormat.setOutputPath(job, new Path(outputPath));
- FileInputFormat.setInputPaths(job, new Path(inputPath));
- job.setNumReduceTasks(1);
- System.exit(job.waitForCompletion(true) ? 0 : 1);
- return 0;
- }
- public static void main(String[] args) throws Exception {
- int exitCode = ToolRunner.run(new StubDriver(), args);
- System.exit(exitCode);
- }
- public static void removeDir(String path, Configuration conf) throws IOException {
- Path output_path = new Path(path);
- FileSystem fs = FileSystem.get(conf);
- if (fs.exists(output_path)) {
- fs.delete(output_path, true);
- }
- }
- }
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