标签: toolrunner

大多数Hadoop MapReduce程序都是这样的:

public class MyApp extends Configured Implements Tool {
    @Override
    public int run(String[] args) throws Exception {
        Job job = new Job(getConf());
        /* process command line options */
        return job.waitForCompletion(true) ? 0 : 1;
    }
    public static void main(String[] args) throws Exception {
        int exitCode = ToolRunner.run(new MyApp(), args);
        System.exit(exitCode);
    }
}

有什么用Configured？由于Tool和Configured都有getConf()和setConf()共同点.它为我们的应用程序提供了什么？