package sample;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Map;


/**
 * Simple usage example for class java.lang.ProcessBuilder under Windows (XP, Vista, ...) 
 */
public class ProcessBuilderTest {
	/**
	 * @param args no arguments needed
	 */
	public static void main(String[] args) {
		ProcessBuilder pb = new ProcessBuilder();
		pb.redirectErrorStream(true);
		pb.directory(new File("C:/"));
		pb.command("cmd", "/c", "dir");
		//Map<String, String> env = pb.environment();
		//env.put("PB_SAMPLE_VAR", "Hello World!");
		//pb.command("cmd", "/c", "echo", "%PB_SAMPLE_VAR%");
		
		Process p;
		try {
			p = pb.start();
		}
		catch (Exception e) {
			e.printStackTrace();
			System.exit(1);
			return;
		}
		
		System.out.println("stdout/stderr of command: " + pb.command());
		System.out.println("-------------------------");
		InputStreamReader isr = null;
		BufferedReader    br  = null;
		try {
		    isr = new InputStreamReader(p.getInputStream());
		    br  = new BufferedReader(isr);
		
		    String line;
		    for (;;) {
		        try {
				    line = br.readLine();
				    if (line == null) {
					    break;
				    }
				    System.out.println(line);
			    }
		        catch (IOException e) {
				    e.printStackTrace();
				    break;
			    }
		    }
		}
		finally {
			if (br != null) {
				try { br.close(); } catch (Exception ex) { /* */ }
			}
		}
		
		int exitcode = -1;
		try {
			exitcode = p.waitFor();
		} catch (InterruptedException e) {
			e.printStackTrace();
			exitcode = -42;
		}
		System.out.println("-------");
		System.out.println("exitcode: " + exitcode);
	}
}