import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.RandomAccessFile;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;

public class Detector {

	private static void keepTomcatAlive() throws Exception {
		String s;
		String t = "Tomcat7.exe";
		boolean isTomcatAlive = false;
		BufferedReader in;
		try {
			URL url = new URL(PropertiesUtil.getProps("url"));
			URLConnection con = url.openConnection();
			in = new BufferedReader(new InputStreamReader(con.getInputStream()));
			con.setConnectTimeout(1000);
			con.setReadTimeout(4000);
			while ((s = in.readLine()) != null) {
				if (s.length() > 0) {
					System.out.println("<" + new Date()
							+ "> Tomcat is alive...");
					writeConsoleToFile("<" + new Date()
							+ "> Tomcat is alive...");
					return;
				}
			}
			in.close();
		} catch (Exception e) {
			e.printStackTrace();
			writeConsoleToFile(e.toString());
		}

		try {
			Process p = Runtime.getRuntime().exec("tasklist");
			in = new BufferedReader(new InputStreamReader(p.getInputStream()));
			while ((s = in.readLine()) != null) {
				if (s.startsWith(t)) {
					isTomcatAlive = true;
					break;
				}
			}
			in.close();
		} catch (Exception e) {
			e.printStackTrace();
			writeConsoleToFile(e.toString());
		}

		if (isTomcatAlive) {
			System.out.println("<" + new Date()
					+ "> Tomcat is alive but not response!");
			writeConsoleToFile("<" + new Date()
					+ "> Tomcat is alive but not response!");
			stopTomcat();
		}

		startTomcat();
	}

	public static void stopTomcat() {
		try {
			Process p = Runtime.getRuntime().exec("net stop Tomcat7");
			BufferedReader in = new BufferedReader(new InputStreamReader(
					p.getInputStream()));
			String s;
			String t = "成功停止";
			boolean restart = false;
			while ((s = in.readLine()) != null) {
				if (s.indexOf(t) != -1) {
					restart = true;
					break;
				}
				System.out.println(s);
				writeConsoleToFile(s);
			}
			System.out.println("<" + new Date() + "> Tomcat is stop "
					+ (restart ? "OK" : "ERROR"));
			writeConsoleToFile("<" + new Date() + "> Tomcat is stop "
					+ (restart ? "OK" : "ERROR"));
		} catch (Exception e) {
			e.printStackTrace();
			try {
				writeConsoleToFile(e.toString());
			} catch (Exception e1) {
				e1.printStackTrace();
			}
		}

	}

	public static void startTomcat() {
		try {
			Process p = Runtime.getRuntime().exec("net start Tomcat7");
			BufferedReader in = new BufferedReader(new InputStreamReader(
					p.getInputStream()));
			String s;
			String t = "启动成功";
			boolean restart = false;
			while ((s = in.readLine()) != null) {
				if (s.indexOf(t) != -1) {
					restart = true;
					break;
				}
				System.out.println(s);
				writeConsoleToFile(s);
			}
			System.out.println("<" + new Date() + "> Tomcat is start "
					+ (restart ? "OK" : "ERROR"));
			writeConsoleToFile("<" + new Date() + "> Tomcat is start "
					+ (restart ? "OK" : "ERROR"));
		} catch (Exception e) {
			e.printStackTrace();
			try {
				writeConsoleToFile(e.toString());
			} catch (Exception e1) {
				e1.printStackTrace();
			}
		}
	}

	public static void writeConsoleToFile(String newStr) throws Exception {
		File filename = new File(PropertiesUtil.getProps("file"));
		if (!filename.exists()) {
			filename.createNewFile();
		}
		String readStr = "";
		String read;
		FileReader fileread = new FileReader(filename);
		BufferedReader bufread = new BufferedReader(fileread);
		while ((read = bufread.readLine()) != null) {
			readStr = readStr + read + "\r\n";
		}
		String filein = newStr + "\r\n" + readStr + "\r\n";
		RandomAccessFile mm = new RandomAccessFile(filename, "rw");
		mm.writeBytes(filein);
		if (bufread != null) {
			bufread.close();
		}
		if (mm != null) {
			mm.close();
		}
	}

	public static void main(String[] args) {
		while (true) {
			try {
				Detector.keepTomcatAlive();
				Thread.sleep(30000);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

}