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path: root/gearman/controllerWorker/ControllerWorker/Shutdown.java
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package ControllerWorker;

import java.io.IOException;
import java.lang.Thread;
import java.util.concurrent.ExecutionException;
import java.util.Date;
import java.util.HashMap;
import java.util.Vector;

import org.gearman.client.GearmanClient;
import org.gearman.client.GearmanClientImpl;
import org.gearman.client.GearmanJob;
import org.gearman.client.GearmanJobImpl;
import org.gearman.client.GearmanJobResult;
import org.gearman.client.GearmanJobStatus;
import org.gearman.common.GearmanJobServerConnection;
import org.gearman.common.GearmanNIOJobServerConnection;
import org.gearman.util.ByteUtils;

import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

public class Shutdown extends Thread {
	private long beginTime;
	private long timeTaken;
	private long timeLeft;
	private Boolean finished;
	private Boolean error;
	private final int updateRate;
	private final long updatePeriod;

	private HashMap<Integer, GearmanJob> pingJobs;
	private HashMap<Integer, GearmanJob> whoJobs;
	private HashMap<Integer, GearmanJob> shutdownJobs;
	private HashMap<Integer, GearmanJob> pingShutdownJobs;
	private HashMap<Integer, GearmanJob> sshJobs;
	private HashMap<Integer, Integer> status;
	private HashMap<Integer, Integer> errors;
	private HashMap<Integer, Long> pingShutdownTime;

	private Vector<HashMap<String, String>> clients;

	private final GearmanJobServerConnection gearmanConnection;
	private GearmanClient gearmanClient;

	public Shutdown(String serverAddress, int port,
			Vector<HashMap<String, String>> clients, int updateRate) {
		this.pingJobs = new HashMap<Integer, GearmanJob>();
		this.whoJobs = new HashMap<Integer, GearmanJob>();
		this.shutdownJobs = new HashMap<Integer, GearmanJob>();
		this.sshJobs = new HashMap<Integer, GearmanJob>();
		this.status = new HashMap<Integer, Integer>();
		this.errors = new HashMap<Integer, Integer>();
		this.updateRate = updateRate; // updates per second
		this.updatePeriod = 1000000000L / this.updateRate; // nanoseconds
		this.gearmanConnection = new GearmanNIOJobServerConnection(
				serverAddress, port);
		this.gearmanClient = new GearmanClientImpl();
		gearmanClient.addJobServer(this.gearmanConnection);
		this.clients = clients;
		for (HashMap<String, String> client : clients) {
			int clientID = Integer.parseInt(client.get("id"));
			status.put(clientID, 0); // no work
		}
		this.finished = false;
		this.error = false;
	}

	public void run() {
		workerLoop();
	}

	private void workerLoop() {
		Boolean run = true;
		while (run) {
			try {
				beginTime = System.nanoTime();
				run = update();
				timeTaken = System.nanoTime() - beginTime;
				timeLeft = (updatePeriod - timeTaken) / 1000000;
				if (timeLeft < 10)
					timeLeft = 10;
				Thread.sleep(timeLeft);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		this.finished = true;
		System.out.println("Shutdown finished");
	}

	private Boolean update() throws IllegalStateException, IOException,
			InterruptedException, ExecutionException {
		Boolean allFinished = false;

		for (HashMap<String, String> client : clients) {
			String ipAddress = client.get("ip");
			String macAddress = client.get("mac");
			int clientID = Integer.parseInt(client.get("id"));
			int clientStatus = status.get(clientID);

			switch (clientStatus) {

			case 0:
				ping(client);

				break;

			case 1:
				GearmanJob pingJob = pingJobs.get(clientID);

				if (pingJob != null) {
					GearmanJobStatus jobStatus = gearmanClient
							.getJobStatus(pingJob);

					if (!jobStatus.isKnown() && pingJob.isDone()) {
						GearmanJobResult pingJobRes = pingJob.get();
						String result = ByteUtils.fromUTF8Bytes(pingJobRes
								.getResults());

						if (result != "") {
							JSONObject resultObj = (JSONObject) JSONValue
									.parse(result);
							String alive = resultObj.get("alive").toString();

							if (alive.equals("true")) {
								System.out.println(ipAddress + " alive");
								status.put(clientID, 3); // alive, check Users
								pingJobs.remove(clientID);
							} else {
								System.out.println(ipAddress + " not alive");
								status.put(clientID, 7); // not alive, go in
								// successState
								pingJobs.remove(clientID);
							}
						}
					}
				}

				break;

			case 2:
				who(client);

				break;

			case 3:
				shutdown(client);

				break;

			case 4:
				pingShutdown(client);

				break;

			case 5:
				GearmanJob pingJobShutdown = pingShutdownJobs.get(clientID);
				if (pingJobShutdown != null) {
					Date currentDate = new Date();
					Long currentTimestamp = currentDate.getTime();
					Long expectedTimestamp = this.pingShutdownTime
							.get(clientID) + 120000L; // wait 2 min until
					// WoL-Failed
					if (expectedTimestamp >= currentTimestamp) {
						GearmanJobStatus jobStatus = gearmanClient
								.getJobStatus(pingJobShutdown);
						if (!jobStatus.isKnown() && pingJobShutdown.isDone()) {
							GearmanJobResult pingJobRes = pingJobShutdown.get();
							String result = ByteUtils.fromUTF8Bytes(pingJobRes
									.getResults());
							if (result != "") {
								JSONObject resultObj = (JSONObject) JSONValue
										.parse(result);
								String alive = resultObj.get("alive")
										.toString();
								if (alive.equals("false")) {
									System.out
											.println(ipAddress
													+ " is alive after shutdown. Ping again...");
									status.put(clientID, 4); // alive, ping
									// again
									pingShutdownJobs.remove(clientID);
								} else {
									System.out
											.println("not alive after shutdown"
													+ ipAddress);
									status.put(clientID, 7); // go in
									// successState
								}
							}
						}
					} else {
						System.out.println(ipAddress
								+ " is alive after shutdown");
						status.put(clientID, 6); // not alive, go in errorState
						pingShutdownJobs.remove(clientID);
					}
				}

				break;

			case 6:
				System.out.println("Shutdown failed after 2min"); // errorState

				break;

			case 7:
				System.out.println("Shutdown successful"); // successState

				break;

			}
			if (clientStatus == 20) {
				allFinished = true;
			} else if (clientStatus == 19) {
				allFinished = true;
				this.error = true;
			} else {
				allFinished = false;
			}
		}

		if (allFinished) {
			return false;
		} else {
			return true;
		}
	}

	private void ping(HashMap<String, String> client) {
		String ipAddress = client.get("ip");
		int clientID = Integer.parseInt(client.get("id"));

		GearmanJob job = GearmanJobImpl.createJob("ping", ipAddress.getBytes(),
				"ping" + clientID);
		gearmanClient.submit(job);

		status.put(clientID, 1); // ping started
		pingJobs.put(clientID, job);

		System.out.println("ping " + ipAddress);
	}

	private void who(HashMap<String, String> client) {
		String ipAddress = client.get("ip");
		int clientID = Integer.parseInt(client.get("id"));

		GearmanJob job = GearmanJobImpl.createJob("who", ipAddress.getBytes(),
				"who" + clientID);
		gearmanClient.submit(job);

		status.put(clientID, 1); // who started
		pingJobs.put(clientID, job);

		System.out.println("who " + ipAddress);
	}

	private void shutdown(HashMap<String, String> client) {
		String ipAddress = client.get("ip");
		int clientID = Integer.parseInt(client.get("id"));

		GearmanJob job = GearmanJobImpl.createJob("shutdown", ipAddress
				.getBytes(), "shutdown" + clientID);
		gearmanClient.submit(job);

		status.put(clientID, 5); // shutdown started
		pingJobs.put(clientID, job);

		System.out.println("shutdown " + ipAddress);
	}

	private void pingShutdown(HashMap<String, String> client) {
		String ipAddress = client.get("ip");
		int clientID = Integer.parseInt(client.get("id"));

		GearmanJob job = GearmanJobImpl.createJob("ping", ipAddress.getBytes(),
				"ping" + clientID);
		gearmanClient.submit(job);

		status.put(clientID, 7); // pingShutdown started
		pingShutdownJobs.put(clientID, job);

		System.out.println("ping " + ipAddress);
	}

	private void ssh(HashMap<String, String> client) {
		String ipAddress = client.get("ip");
		int clientID = Integer.parseInt(client.get("id"));

		GearmanJob job = GearmanJobImpl.createJob("ssh", ipAddress.getBytes(),
				"ssh" + clientID);
		gearmanClient.submit(job);

		status.put(clientID, 6); // ssh started
		sshJobs.put(clientID, job);

		System.out.println("ssh " + ipAddress);
	}

	public Vector<HashMap<String, String>> getClients() {
		return clients;
	}

	public GearmanClient getGearmanClient() {
		return gearmanClient;
	}

	public GearmanJobServerConnection getGearmanConnection() {
		return gearmanConnection;
	}

	public HashMap<Integer, GearmanJob> getPingJobs() {
		return pingJobs;
	}

	public HashMap<Integer, GearmanJob> getSshJobs() {
		return sshJobs;
	}

	public HashMap<Integer, GearmanJob> getWhoJobs() {
		return whoJobs;
	}

	public HashMap<Integer, GearmanJob> getShutdownJobs() {
		return shutdownJobs;
	}

	public HashMap<Integer, Integer> getStatus() {
		return status;
	}

	public HashMap<Integer, Integer> getErrors() {
		return errors;
	}

	public Boolean isFinished() {
		return finished;
	}

	public Boolean isFinishedWithErrors() {
		return finished && error;
	}
}