Launcher.java

package com.taobao.loganalyzer.common;

import java.util.HashMap;
import java.util.Map;

public class Launcher {

	public static void printErrorAndExit(String message) {
		System.out.println(message);

		System.out
				.println("Usage : Launcher [ProcessorClass] [InputPath] [OutputPath] [numOfMappers] [numOfReducers] <name1=value1> <name2=value2>...");

		System.exit(1);
	}

	public static void main(String args[]) throws Exception {
		try {
			if (args.length < 6)
				printErrorAndExit("Sorry,Invalid number of arguments");

			Processor processor = null;

			try {
				processor = (Processor) (Class.forName(args[0]).newInstance());
			} catch (Exception e) {
				printErrorAndExit("Sorry,Invaild processor" + args[0]);
			}
			Map<String, String> properties = new HashMap<String, String>();
			if (args.length > 6) {
				String arg = null;
				for (int i = 6; i < args.length; i++) {
					arg = args[i];
					int p = arg.indexOf("=");
					if (p != -1) {
						properties.put(arg.substring(0, p), arg
								.substring(p + 1));
					} else {
						printErrorAndExit("Sorry,Invaild parameter" + arg);
					}
				}
			}

			boolean success = processor.run(args[1], args[2], Integer
					.parseInt(args[3]), Integer.parseInt(args[4]), Boolean
					.parseBoolean(args[5]), properties);
			
			System.out.println("Taobao_Status :" +success);
			System.exit(0);

		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("Taobao_Status : false");
			System.exit(1);
		}
	}
}